com.amazonaws.services.dynamodbv2.model.ScanRequest Maven / Gradle / Ivy
Show all versions of aws-java-sdk-dynamodb Show documentation
/*
* Copyright 2017-2022 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance with
* the License. A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions
* and limitations under the License.
*/
package com.amazonaws.services.dynamodbv2.model;
import java.io.Serializable;
import javax.annotation.Generated;
import com.amazonaws.AmazonWebServiceRequest;
/**
*
* Represents the input of a Scan operation.
*
*
* @see AWS API
* Documentation
*/
@Generated("com.amazonaws:aws-java-sdk-code-generator")
public class ScanRequest extends com.amazonaws.AmazonWebServiceRequest implements Serializable, Cloneable {
/**
*
* The name of the table containing the requested items; or, if you provide IndexName, the name of the
* table to which that index belongs.
*
*/
private String tableName;
/**
*
* The name of a secondary index to scan. This index can be any local secondary index or global secondary index.
* Note that if you use the IndexName parameter, you must also provide TableName.
*
*/
private String indexName;
/**
*
* This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
*
*/
private java.util.List attributesToGet;
/**
*
* The maximum number of items to evaluate (not necessarily the number of matching items). If DynamoDB processes the
* number of items up to the limit while processing the results, it stops the operation and returns the matching
* values up to that point, and a key in LastEvaluatedKey to apply in a subsequent operation, so that
* you can pick up where you left off. Also, if the processed dataset size exceeds 1 MB before DynamoDB reaches this
* limit, it stops the operation and returns the matching values up to the limit, and a key in
* LastEvaluatedKey to apply in a subsequent operation to continue the operation. For more information,
* see Working with
* Queries in the Amazon DynamoDB Developer Guide.
*
*/
private Integer limit;
/**
*
* The attributes to be returned in the result. You can retrieve all item attributes, specific item attributes, the
* count of matching items, or in the case of an index, some or all of the attributes projected into the index.
*
*
* -
*
* ALL_ATTRIBUTES - Returns all of the item attributes from the specified table or index. If you query
* a local secondary index, then for each matching item in the index, DynamoDB fetches the entire item from the
* parent table. If the index is configured to project all item attributes, then all of the data can be obtained
* from the local secondary index, and no fetching is required.
*
*
* -
*
* ALL_PROJECTED_ATTRIBUTES - Allowed only when querying an index. Retrieves all attributes that have
* been projected into the index. If the index is configured to project all attributes, this return value is
* equivalent to specifying ALL_ATTRIBUTES.
*
*
* -
*
* COUNT - Returns the number of matching items, rather than the matching items themselves.
*
*
* -
*
* SPECIFIC_ATTRIBUTES - Returns only the attributes listed in ProjectionExpression. This
* return value is equivalent to specifying ProjectionExpression without specifying any value for
* Select.
*
*
* If you query or scan a local secondary index and request only attributes that are projected into that index, the
* operation reads only the index and not the table. If any of the requested attributes are not projected into the
* local secondary index, DynamoDB fetches each of these attributes from the parent table. This extra fetching
* incurs additional throughput cost and latency.
*
*
* If you query or scan a global secondary index, you can only request attributes that are projected into the index.
* Global secondary index queries cannot fetch attributes from the parent table.
*
*
*
*
* If neither Select nor ProjectionExpression are specified, DynamoDB defaults to
* ALL_ATTRIBUTES when accessing a table, and ALL_PROJECTED_ATTRIBUTES when accessing an
* index. You cannot use both Select and ProjectionExpression together in a single
* request, unless the value for Select is SPECIFIC_ATTRIBUTES. (This usage is equivalent
* to specifying ProjectionExpression without any value for Select.)
*
*
*
* If you use the ProjectionExpression parameter, then the value for Select can only be
* SPECIFIC_ATTRIBUTES. Any other value for Select will return an error.
*
*
*/
private String select;
/**
*
* This is a legacy parameter. Use FilterExpression instead. For more information, see ScanFilter in the Amazon DynamoDB Developer Guide.
*
*/
private java.util.Map scanFilter;
/**
*
* This is a legacy parameter. Use FilterExpression instead. For more information, see ConditionalOperator in the Amazon DynamoDB Developer Guide.
*
*/
private String conditionalOperator;
/**
*
* The primary key of the first item that this operation will evaluate. Use the value that was returned for
* LastEvaluatedKey in the previous operation.
*
*
* The data type for ExclusiveStartKey must be String, Number or Binary. No set data types are allowed.
*
*
* In a parallel scan, a Scan request that includes ExclusiveStartKey must specify the
* same segment whose previous Scan returned the corresponding value of LastEvaluatedKey.
*
*/
private java.util.Map exclusiveStartKey;
private String returnConsumedCapacity;
/**
*
* For a parallel Scan request, TotalSegments represents the total number of segments into
* which the Scan operation will be divided. The value of TotalSegments corresponds to the
* number of application workers that will perform the parallel scan. For example, if you want to use four
* application threads to scan a table or an index, specify a TotalSegments value of 4.
*
*
* The value for TotalSegments must be greater than or equal to 1, and less than or equal to 1000000.
* If you specify a TotalSegments value of 1, the Scan operation will be sequential rather
* than parallel.
*
*
* If you specify TotalSegments, you must also specify Segment.
*
*/
private Integer totalSegments;
/**
*
* For a parallel Scan request, Segment identifies an individual segment to be scanned by
* an application worker.
*
*
* Segment IDs are zero-based, so the first segment is always 0. For example, if you want to use four application
* threads to scan a table or an index, then the first thread specifies a Segment value of 0, the
* second thread specifies 1, and so on.
*
*
* The value of LastEvaluatedKey returned from a parallel Scan request must be used as
* ExclusiveStartKey with the same segment ID in a subsequent Scan operation.
*
*
* The value for Segment must be greater than or equal to 0, and less than the value provided for
* TotalSegments.
*
*
* If you provide Segment, you must also provide TotalSegments.
*
*/
private Integer segment;
/**
*
* A string that identifies one or more attributes to retrieve from the specified table or index. These attributes
* can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by
* commas.
*
*
* If no attribute names are specified, then all attributes will be returned. If any of the requested attributes are
* not found, they will not appear in the result.
*
*
* For more information, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
*
*/
private String projectionExpression;
/**
*
* A string that contains conditions that DynamoDB applies after the Scan operation, but before the
* data is returned to you. Items that do not satisfy the FilterExpression criteria are not returned.
*
*
*
* A FilterExpression is applied after the items have already been read; the process of filtering does
* not consume any additional read capacity units.
*
*
*
* For more information, see Filter Expressions in the Amazon DynamoDB Developer Guide.
*
*/
private String filterExpression;
/**
*
* One or more substitution tokens for attribute names in an expression. The following are some use cases for using
* ExpressionAttributeNames:
*
*
* -
*
* To access an attribute whose name conflicts with a DynamoDB reserved word.
*
*
* -
*
* To create a placeholder for repeating occurrences of an attribute name in an expression.
*
*
* -
*
* To prevent special characters in an attribute name from being misinterpreted in an expression.
*
*
*
*
* Use the # character in an expression to dereference an attribute name. For example, consider the following
* attribute name:
*
*
* -
*
* Percentile
*
*
*
*
* The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For
* the complete list of reserved words, see Reserved Words in
* the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for
* ExpressionAttributeNames:
*
*
* -
*
* {"#P":"Percentile"}
*
*
*
*
* You could then use this substitution in an expression, as in this example:
*
*
* -
*
* #P = :val
*
*
*
*
*
* Tokens that begin with the : character are expression attribute values, which are placeholders for
* the actual value at runtime.
*
*
*
* For more information on expression attribute names, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
*
*/
private java.util.Map expressionAttributeNames;
/**
*
* One or more values that can be substituted in an expression.
*
*
* Use the : (colon) character in an expression to dereference an attribute value. For example, suppose that
* you wanted to check whether the value of the ProductStatus attribute was one of the following:
*
*
* Available | Backordered | Discontinued
*
*
* You would first need to specify ExpressionAttributeValues as follows:
*
*
* { ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"} }
*
*
* You could then use these values in an expression, such as this:
*
*
* ProductStatus IN (:avail, :back, :disc)
*
*
* For more information on expression attribute values, see Condition Expressions in the Amazon DynamoDB Developer Guide.
*
*/
private java.util.Map expressionAttributeValues;
/**
*
* A Boolean value that determines the read consistency model during the scan:
*
*
* -
*
* If ConsistentRead is false, then the data returned from Scan might not
* contain the results from other recently completed write operations (PutItem, UpdateItem
* , or DeleteItem).
*
*
* -
*
* If ConsistentRead is true, then all of the write operations that completed before the
* Scan began are guaranteed to be contained in the Scan response.
*
*
*
*
* The default setting for ConsistentRead is false.
*
*
* The ConsistentRead parameter is not supported on global secondary indexes. If you scan a global
* secondary index with ConsistentRead set to true, you will receive a ValidationException
* .
*
*/
private Boolean consistentRead;
/**
* Default constructor for ScanRequest object. Callers should use the setter or fluent setter (with...) methods to
* initialize the object after creating it.
*/
public ScanRequest() {
}
/**
* Constructs a new ScanRequest object. Callers should use the setter or fluent setter (with...) methods to
* initialize any additional object members.
*
* @param tableName
* The name of the table containing the requested items; or, if you provide IndexName, the name
* of the table to which that index belongs.
*/
public ScanRequest(String tableName) {
setTableName(tableName);
}
/**
*
* The name of the table containing the requested items; or, if you provide IndexName, the name of the
* table to which that index belongs.
*
*
* @param tableName
* The name of the table containing the requested items; or, if you provide IndexName, the name
* of the table to which that index belongs.
*/
public void setTableName(String tableName) {
this.tableName = tableName;
}
/**
*
* The name of the table containing the requested items; or, if you provide IndexName, the name of the
* table to which that index belongs.
*
*
* @return The name of the table containing the requested items; or, if you provide IndexName, the name
* of the table to which that index belongs.
*/
public String getTableName() {
return this.tableName;
}
/**
*
* The name of the table containing the requested items; or, if you provide IndexName, the name of the
* table to which that index belongs.
*
*
* @param tableName
* The name of the table containing the requested items; or, if you provide IndexName, the name
* of the table to which that index belongs.
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest withTableName(String tableName) {
setTableName(tableName);
return this;
}
/**
*
* The name of a secondary index to scan. This index can be any local secondary index or global secondary index.
* Note that if you use the IndexName parameter, you must also provide TableName.
*
*
* @param indexName
* The name of a secondary index to scan. This index can be any local secondary index or global secondary
* index. Note that if you use the IndexName parameter, you must also provide
* TableName.
*/
public void setIndexName(String indexName) {
this.indexName = indexName;
}
/**
*
* The name of a secondary index to scan. This index can be any local secondary index or global secondary index.
* Note that if you use the IndexName parameter, you must also provide TableName.
*
*
* @return The name of a secondary index to scan. This index can be any local secondary index or global secondary
* index. Note that if you use the IndexName parameter, you must also provide
* TableName.
*/
public String getIndexName() {
return this.indexName;
}
/**
*
* The name of a secondary index to scan. This index can be any local secondary index or global secondary index.
* Note that if you use the IndexName parameter, you must also provide TableName.
*
*
* @param indexName
* The name of a secondary index to scan. This index can be any local secondary index or global secondary
* index. Note that if you use the IndexName parameter, you must also provide
* TableName.
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest withIndexName(String indexName) {
setIndexName(indexName);
return this;
}
/**
*
* This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
*
*
* @return This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
*/
public java.util.List getAttributesToGet() {
return attributesToGet;
}
/**
*
* This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
*
*
* @param attributesToGet
* This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
*/
public void setAttributesToGet(java.util.Collection attributesToGet) {
if (attributesToGet == null) {
this.attributesToGet = null;
return;
}
this.attributesToGet = new java.util.ArrayList(attributesToGet);
}
/**
*
* This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
*
*
* NOTE: This method appends the values to the existing list (if any). Use
* {@link #setAttributesToGet(java.util.Collection)} or {@link #withAttributesToGet(java.util.Collection)} if you
* want to override the existing values.
*
*
* @param attributesToGet
* This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest withAttributesToGet(String... attributesToGet) {
if (this.attributesToGet == null) {
setAttributesToGet(new java.util.ArrayList(attributesToGet.length));
}
for (String ele : attributesToGet) {
this.attributesToGet.add(ele);
}
return this;
}
/**
*
* This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
*
*
* @param attributesToGet
* This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest withAttributesToGet(java.util.Collection attributesToGet) {
setAttributesToGet(attributesToGet);
return this;
}
/**
*
* The maximum number of items to evaluate (not necessarily the number of matching items). If DynamoDB processes the
* number of items up to the limit while processing the results, it stops the operation and returns the matching
* values up to that point, and a key in LastEvaluatedKey to apply in a subsequent operation, so that
* you can pick up where you left off. Also, if the processed dataset size exceeds 1 MB before DynamoDB reaches this
* limit, it stops the operation and returns the matching values up to the limit, and a key in
* LastEvaluatedKey to apply in a subsequent operation to continue the operation. For more information,
* see Working with
* Queries in the Amazon DynamoDB Developer Guide.
*
*
* @param limit
* The maximum number of items to evaluate (not necessarily the number of matching items). If DynamoDB
* processes the number of items up to the limit while processing the results, it stops the operation and
* returns the matching values up to that point, and a key in LastEvaluatedKey to apply in a
* subsequent operation, so that you can pick up where you left off. Also, if the processed dataset size
* exceeds 1 MB before DynamoDB reaches this limit, it stops the operation and returns the matching values up
* to the limit, and a key in LastEvaluatedKey to apply in a subsequent operation to continue
* the operation. For more information, see Working with
* Queries in the Amazon DynamoDB Developer Guide.
*/
public void setLimit(Integer limit) {
this.limit = limit;
}
/**
*
* The maximum number of items to evaluate (not necessarily the number of matching items). If DynamoDB processes the
* number of items up to the limit while processing the results, it stops the operation and returns the matching
* values up to that point, and a key in LastEvaluatedKey to apply in a subsequent operation, so that
* you can pick up where you left off. Also, if the processed dataset size exceeds 1 MB before DynamoDB reaches this
* limit, it stops the operation and returns the matching values up to the limit, and a key in
* LastEvaluatedKey to apply in a subsequent operation to continue the operation. For more information,
* see Working with
* Queries in the Amazon DynamoDB Developer Guide.
*
*
* @return The maximum number of items to evaluate (not necessarily the number of matching items). If DynamoDB
* processes the number of items up to the limit while processing the results, it stops the operation and
* returns the matching values up to that point, and a key in LastEvaluatedKey to apply in a
* subsequent operation, so that you can pick up where you left off. Also, if the processed dataset size
* exceeds 1 MB before DynamoDB reaches this limit, it stops the operation and returns the matching values
* up to the limit, and a key in LastEvaluatedKey to apply in a subsequent operation to
* continue the operation. For more information, see Working with
* Queries in the Amazon DynamoDB Developer Guide.
*/
public Integer getLimit() {
return this.limit;
}
/**
*
* The maximum number of items to evaluate (not necessarily the number of matching items). If DynamoDB processes the
* number of items up to the limit while processing the results, it stops the operation and returns the matching
* values up to that point, and a key in LastEvaluatedKey to apply in a subsequent operation, so that
* you can pick up where you left off. Also, if the processed dataset size exceeds 1 MB before DynamoDB reaches this
* limit, it stops the operation and returns the matching values up to the limit, and a key in
* LastEvaluatedKey to apply in a subsequent operation to continue the operation. For more information,
* see Working with
* Queries in the Amazon DynamoDB Developer Guide.
*
*
* @param limit
* The maximum number of items to evaluate (not necessarily the number of matching items). If DynamoDB
* processes the number of items up to the limit while processing the results, it stops the operation and
* returns the matching values up to that point, and a key in LastEvaluatedKey to apply in a
* subsequent operation, so that you can pick up where you left off. Also, if the processed dataset size
* exceeds 1 MB before DynamoDB reaches this limit, it stops the operation and returns the matching values up
* to the limit, and a key in LastEvaluatedKey to apply in a subsequent operation to continue
* the operation. For more information, see Working with
* Queries in the Amazon DynamoDB Developer Guide.
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest withLimit(Integer limit) {
setLimit(limit);
return this;
}
/**
*
* The attributes to be returned in the result. You can retrieve all item attributes, specific item attributes, the
* count of matching items, or in the case of an index, some or all of the attributes projected into the index.
*
*
* -
*
* ALL_ATTRIBUTES - Returns all of the item attributes from the specified table or index. If you query
* a local secondary index, then for each matching item in the index, DynamoDB fetches the entire item from the
* parent table. If the index is configured to project all item attributes, then all of the data can be obtained
* from the local secondary index, and no fetching is required.
*
*
* -
*
* ALL_PROJECTED_ATTRIBUTES - Allowed only when querying an index. Retrieves all attributes that have
* been projected into the index. If the index is configured to project all attributes, this return value is
* equivalent to specifying ALL_ATTRIBUTES.
*
*
* -
*
* COUNT - Returns the number of matching items, rather than the matching items themselves.
*
*
* -
*
* SPECIFIC_ATTRIBUTES - Returns only the attributes listed in ProjectionExpression. This
* return value is equivalent to specifying ProjectionExpression without specifying any value for
* Select.
*
*
* If you query or scan a local secondary index and request only attributes that are projected into that index, the
* operation reads only the index and not the table. If any of the requested attributes are not projected into the
* local secondary index, DynamoDB fetches each of these attributes from the parent table. This extra fetching
* incurs additional throughput cost and latency.
*
*
* If you query or scan a global secondary index, you can only request attributes that are projected into the index.
* Global secondary index queries cannot fetch attributes from the parent table.
*
*
*
*
* If neither Select nor ProjectionExpression are specified, DynamoDB defaults to
* ALL_ATTRIBUTES when accessing a table, and ALL_PROJECTED_ATTRIBUTES when accessing an
* index. You cannot use both Select and ProjectionExpression together in a single
* request, unless the value for Select is SPECIFIC_ATTRIBUTES. (This usage is equivalent
* to specifying ProjectionExpression without any value for Select.)
*
*
*
* If you use the ProjectionExpression parameter, then the value for Select can only be
* SPECIFIC_ATTRIBUTES. Any other value for Select will return an error.
*
*
*
* @param select
* The attributes to be returned in the result. You can retrieve all item attributes, specific item
* attributes, the count of matching items, or in the case of an index, some or all of the attributes
* projected into the index.
*
* -
*
* ALL_ATTRIBUTES - Returns all of the item attributes from the specified table or index. If you
* query a local secondary index, then for each matching item in the index, DynamoDB fetches the entire item
* from the parent table. If the index is configured to project all item attributes, then all of the data can
* be obtained from the local secondary index, and no fetching is required.
*
*
* -
*
* ALL_PROJECTED_ATTRIBUTES - Allowed only when querying an index. Retrieves all attributes that
* have been projected into the index. If the index is configured to project all attributes, this return
* value is equivalent to specifying ALL_ATTRIBUTES.
*
*
* -
*
* COUNT - Returns the number of matching items, rather than the matching items themselves.
*
*
* -
*
* SPECIFIC_ATTRIBUTES - Returns only the attributes listed in ProjectionExpression
* . This return value is equivalent to specifying ProjectionExpression without specifying any
* value for Select.
*
*
* If you query or scan a local secondary index and request only attributes that are projected into that
* index, the operation reads only the index and not the table. If any of the requested attributes are not
* projected into the local secondary index, DynamoDB fetches each of these attributes from the parent table.
* This extra fetching incurs additional throughput cost and latency.
*
*
* If you query or scan a global secondary index, you can only request attributes that are projected into the
* index. Global secondary index queries cannot fetch attributes from the parent table.
*
*
*
*
* If neither Select nor ProjectionExpression are specified, DynamoDB defaults to
* ALL_ATTRIBUTES when accessing a table, and ALL_PROJECTED_ATTRIBUTES when
* accessing an index. You cannot use both Select and ProjectionExpression together
* in a single request, unless the value for Select is SPECIFIC_ATTRIBUTES. (This
* usage is equivalent to specifying ProjectionExpression without any value for
* Select.)
*
*
*
* If you use the ProjectionExpression parameter, then the value for Select can
* only be SPECIFIC_ATTRIBUTES. Any other value for Select will return an error.
*
* @see Select
*/
public void setSelect(String select) {
this.select = select;
}
/**
*
* The attributes to be returned in the result. You can retrieve all item attributes, specific item attributes, the
* count of matching items, or in the case of an index, some or all of the attributes projected into the index.
*
*
* -
*
* ALL_ATTRIBUTES - Returns all of the item attributes from the specified table or index. If you query
* a local secondary index, then for each matching item in the index, DynamoDB fetches the entire item from the
* parent table. If the index is configured to project all item attributes, then all of the data can be obtained
* from the local secondary index, and no fetching is required.
*
*
* -
*
* ALL_PROJECTED_ATTRIBUTES - Allowed only when querying an index. Retrieves all attributes that have
* been projected into the index. If the index is configured to project all attributes, this return value is
* equivalent to specifying ALL_ATTRIBUTES.
*
*
* -
*
* COUNT - Returns the number of matching items, rather than the matching items themselves.
*
*
* -
*
* SPECIFIC_ATTRIBUTES - Returns only the attributes listed in ProjectionExpression. This
* return value is equivalent to specifying ProjectionExpression without specifying any value for
* Select.
*
*
* If you query or scan a local secondary index and request only attributes that are projected into that index, the
* operation reads only the index and not the table. If any of the requested attributes are not projected into the
* local secondary index, DynamoDB fetches each of these attributes from the parent table. This extra fetching
* incurs additional throughput cost and latency.
*
*
* If you query or scan a global secondary index, you can only request attributes that are projected into the index.
* Global secondary index queries cannot fetch attributes from the parent table.
*
*
*
*
* If neither Select nor ProjectionExpression are specified, DynamoDB defaults to
* ALL_ATTRIBUTES when accessing a table, and ALL_PROJECTED_ATTRIBUTES when accessing an
* index. You cannot use both Select and ProjectionExpression together in a single
* request, unless the value for Select is SPECIFIC_ATTRIBUTES. (This usage is equivalent
* to specifying ProjectionExpression without any value for Select.)
*
*
*
* If you use the ProjectionExpression parameter, then the value for Select can only be
* SPECIFIC_ATTRIBUTES. Any other value for Select will return an error.
*
*
*
* @return The attributes to be returned in the result. You can retrieve all item attributes, specific item
* attributes, the count of matching items, or in the case of an index, some or all of the attributes
* projected into the index.
*
* -
*
* ALL_ATTRIBUTES - Returns all of the item attributes from the specified table or index. If
* you query a local secondary index, then for each matching item in the index, DynamoDB fetches the entire
* item from the parent table. If the index is configured to project all item attributes, then all of the
* data can be obtained from the local secondary index, and no fetching is required.
*
*
* -
*
* ALL_PROJECTED_ATTRIBUTES - Allowed only when querying an index. Retrieves all attributes
* that have been projected into the index. If the index is configured to project all attributes, this
* return value is equivalent to specifying ALL_ATTRIBUTES.
*
*
* -
*
* COUNT - Returns the number of matching items, rather than the matching items themselves.
*
*
* -
*
* SPECIFIC_ATTRIBUTES - Returns only the attributes listed in
* ProjectionExpression. This return value is equivalent to specifying
* ProjectionExpression without specifying any value for Select.
*
*
* If you query or scan a local secondary index and request only attributes that are projected into that
* index, the operation reads only the index and not the table. If any of the requested attributes are not
* projected into the local secondary index, DynamoDB fetches each of these attributes from the parent
* table. This extra fetching incurs additional throughput cost and latency.
*
*
* If you query or scan a global secondary index, you can only request attributes that are projected into
* the index. Global secondary index queries cannot fetch attributes from the parent table.
*
*
*
*
* If neither Select nor ProjectionExpression are specified, DynamoDB defaults to
* ALL_ATTRIBUTES when accessing a table, and ALL_PROJECTED_ATTRIBUTES when
* accessing an index. You cannot use both Select and ProjectionExpression
* together in a single request, unless the value for Select is
* SPECIFIC_ATTRIBUTES. (This usage is equivalent to specifying
* ProjectionExpression without any value for Select.)
*
*
*
* If you use the ProjectionExpression parameter, then the value for Select can
* only be SPECIFIC_ATTRIBUTES. Any other value for Select will return an error.
*
* @see Select
*/
public String getSelect() {
return this.select;
}
/**
*
* The attributes to be returned in the result. You can retrieve all item attributes, specific item attributes, the
* count of matching items, or in the case of an index, some or all of the attributes projected into the index.
*
*
* -
*
* ALL_ATTRIBUTES - Returns all of the item attributes from the specified table or index. If you query
* a local secondary index, then for each matching item in the index, DynamoDB fetches the entire item from the
* parent table. If the index is configured to project all item attributes, then all of the data can be obtained
* from the local secondary index, and no fetching is required.
*
*
* -
*
* ALL_PROJECTED_ATTRIBUTES - Allowed only when querying an index. Retrieves all attributes that have
* been projected into the index. If the index is configured to project all attributes, this return value is
* equivalent to specifying ALL_ATTRIBUTES.
*
*
* -
*
* COUNT - Returns the number of matching items, rather than the matching items themselves.
*
*
* -
*
* SPECIFIC_ATTRIBUTES - Returns only the attributes listed in ProjectionExpression. This
* return value is equivalent to specifying ProjectionExpression without specifying any value for
* Select.
*
*
* If you query or scan a local secondary index and request only attributes that are projected into that index, the
* operation reads only the index and not the table. If any of the requested attributes are not projected into the
* local secondary index, DynamoDB fetches each of these attributes from the parent table. This extra fetching
* incurs additional throughput cost and latency.
*
*
* If you query or scan a global secondary index, you can only request attributes that are projected into the index.
* Global secondary index queries cannot fetch attributes from the parent table.
*
*
*
*
* If neither Select nor ProjectionExpression are specified, DynamoDB defaults to
* ALL_ATTRIBUTES when accessing a table, and ALL_PROJECTED_ATTRIBUTES when accessing an
* index. You cannot use both Select and ProjectionExpression together in a single
* request, unless the value for Select is SPECIFIC_ATTRIBUTES. (This usage is equivalent
* to specifying ProjectionExpression without any value for Select.)
*
*
*
* If you use the ProjectionExpression parameter, then the value for Select can only be
* SPECIFIC_ATTRIBUTES. Any other value for Select will return an error.
*
*
*
* @param select
* The attributes to be returned in the result. You can retrieve all item attributes, specific item
* attributes, the count of matching items, or in the case of an index, some or all of the attributes
* projected into the index.
*
* -
*
* ALL_ATTRIBUTES - Returns all of the item attributes from the specified table or index. If you
* query a local secondary index, then for each matching item in the index, DynamoDB fetches the entire item
* from the parent table. If the index is configured to project all item attributes, then all of the data can
* be obtained from the local secondary index, and no fetching is required.
*
*
* -
*
* ALL_PROJECTED_ATTRIBUTES - Allowed only when querying an index. Retrieves all attributes that
* have been projected into the index. If the index is configured to project all attributes, this return
* value is equivalent to specifying ALL_ATTRIBUTES.
*
*
* -
*
* COUNT - Returns the number of matching items, rather than the matching items themselves.
*
*
* -
*
* SPECIFIC_ATTRIBUTES - Returns only the attributes listed in ProjectionExpression
* . This return value is equivalent to specifying ProjectionExpression without specifying any
* value for Select.
*
*
* If you query or scan a local secondary index and request only attributes that are projected into that
* index, the operation reads only the index and not the table. If any of the requested attributes are not
* projected into the local secondary index, DynamoDB fetches each of these attributes from the parent table.
* This extra fetching incurs additional throughput cost and latency.
*
*
* If you query or scan a global secondary index, you can only request attributes that are projected into the
* index. Global secondary index queries cannot fetch attributes from the parent table.
*
*
*
*
* If neither Select nor ProjectionExpression are specified, DynamoDB defaults to
* ALL_ATTRIBUTES when accessing a table, and ALL_PROJECTED_ATTRIBUTES when
* accessing an index. You cannot use both Select and ProjectionExpression together
* in a single request, unless the value for Select is SPECIFIC_ATTRIBUTES. (This
* usage is equivalent to specifying ProjectionExpression without any value for
* Select.)
*
*
*
* If you use the ProjectionExpression parameter, then the value for Select can
* only be SPECIFIC_ATTRIBUTES. Any other value for Select will return an error.
*
* @return Returns a reference to this object so that method calls can be chained together.
* @see Select
*/
public ScanRequest withSelect(String select) {
setSelect(select);
return this;
}
/**
*
* The attributes to be returned in the result. You can retrieve all item attributes, specific item attributes, the
* count of matching items, or in the case of an index, some or all of the attributes projected into the index.
*
*
* -
*
* ALL_ATTRIBUTES - Returns all of the item attributes from the specified table or index. If you query
* a local secondary index, then for each matching item in the index, DynamoDB fetches the entire item from the
* parent table. If the index is configured to project all item attributes, then all of the data can be obtained
* from the local secondary index, and no fetching is required.
*
*
* -
*
* ALL_PROJECTED_ATTRIBUTES - Allowed only when querying an index. Retrieves all attributes that have
* been projected into the index. If the index is configured to project all attributes, this return value is
* equivalent to specifying ALL_ATTRIBUTES.
*
*
* -
*
* COUNT - Returns the number of matching items, rather than the matching items themselves.
*
*
* -
*
* SPECIFIC_ATTRIBUTES - Returns only the attributes listed in ProjectionExpression. This
* return value is equivalent to specifying ProjectionExpression without specifying any value for
* Select.
*
*
* If you query or scan a local secondary index and request only attributes that are projected into that index, the
* operation reads only the index and not the table. If any of the requested attributes are not projected into the
* local secondary index, DynamoDB fetches each of these attributes from the parent table. This extra fetching
* incurs additional throughput cost and latency.
*
*
* If you query or scan a global secondary index, you can only request attributes that are projected into the index.
* Global secondary index queries cannot fetch attributes from the parent table.
*
*
*
*
* If neither Select nor ProjectionExpression are specified, DynamoDB defaults to
* ALL_ATTRIBUTES when accessing a table, and ALL_PROJECTED_ATTRIBUTES when accessing an
* index. You cannot use both Select and ProjectionExpression together in a single
* request, unless the value for Select is SPECIFIC_ATTRIBUTES. (This usage is equivalent
* to specifying ProjectionExpression without any value for Select.)
*
*
*
* If you use the ProjectionExpression parameter, then the value for Select can only be
* SPECIFIC_ATTRIBUTES. Any other value for Select will return an error.
*
*
*
* @param select
* The attributes to be returned in the result. You can retrieve all item attributes, specific item
* attributes, the count of matching items, or in the case of an index, some or all of the attributes
* projected into the index.
*
* -
*
* ALL_ATTRIBUTES - Returns all of the item attributes from the specified table or index. If you
* query a local secondary index, then for each matching item in the index, DynamoDB fetches the entire item
* from the parent table. If the index is configured to project all item attributes, then all of the data can
* be obtained from the local secondary index, and no fetching is required.
*
*
* -
*
* ALL_PROJECTED_ATTRIBUTES - Allowed only when querying an index. Retrieves all attributes that
* have been projected into the index. If the index is configured to project all attributes, this return
* value is equivalent to specifying ALL_ATTRIBUTES.
*
*
* -
*
* COUNT - Returns the number of matching items, rather than the matching items themselves.
*
*
* -
*
* SPECIFIC_ATTRIBUTES - Returns only the attributes listed in ProjectionExpression
* . This return value is equivalent to specifying ProjectionExpression without specifying any
* value for Select.
*
*
* If you query or scan a local secondary index and request only attributes that are projected into that
* index, the operation reads only the index and not the table. If any of the requested attributes are not
* projected into the local secondary index, DynamoDB fetches each of these attributes from the parent table.
* This extra fetching incurs additional throughput cost and latency.
*
*
* If you query or scan a global secondary index, you can only request attributes that are projected into the
* index. Global secondary index queries cannot fetch attributes from the parent table.
*
*
*
*
* If neither Select nor ProjectionExpression are specified, DynamoDB defaults to
* ALL_ATTRIBUTES when accessing a table, and ALL_PROJECTED_ATTRIBUTES when
* accessing an index. You cannot use both Select and ProjectionExpression together
* in a single request, unless the value for Select is SPECIFIC_ATTRIBUTES. (This
* usage is equivalent to specifying ProjectionExpression without any value for
* Select.)
*
*
*
* If you use the ProjectionExpression parameter, then the value for Select can
* only be SPECIFIC_ATTRIBUTES. Any other value for Select will return an error.
*
* @see Select
*/
public void setSelect(Select select) {
withSelect(select);
}
/**
*
* The attributes to be returned in the result. You can retrieve all item attributes, specific item attributes, the
* count of matching items, or in the case of an index, some or all of the attributes projected into the index.
*
*
* -
*
* ALL_ATTRIBUTES - Returns all of the item attributes from the specified table or index. If you query
* a local secondary index, then for each matching item in the index, DynamoDB fetches the entire item from the
* parent table. If the index is configured to project all item attributes, then all of the data can be obtained
* from the local secondary index, and no fetching is required.
*
*
* -
*
* ALL_PROJECTED_ATTRIBUTES - Allowed only when querying an index. Retrieves all attributes that have
* been projected into the index. If the index is configured to project all attributes, this return value is
* equivalent to specifying ALL_ATTRIBUTES.
*
*
* -
*
* COUNT - Returns the number of matching items, rather than the matching items themselves.
*
*
* -
*
* SPECIFIC_ATTRIBUTES - Returns only the attributes listed in ProjectionExpression. This
* return value is equivalent to specifying ProjectionExpression without specifying any value for
* Select.
*
*
* If you query or scan a local secondary index and request only attributes that are projected into that index, the
* operation reads only the index and not the table. If any of the requested attributes are not projected into the
* local secondary index, DynamoDB fetches each of these attributes from the parent table. This extra fetching
* incurs additional throughput cost and latency.
*
*
* If you query or scan a global secondary index, you can only request attributes that are projected into the index.
* Global secondary index queries cannot fetch attributes from the parent table.
*
*
*
*
* If neither Select nor ProjectionExpression are specified, DynamoDB defaults to
* ALL_ATTRIBUTES when accessing a table, and ALL_PROJECTED_ATTRIBUTES when accessing an
* index. You cannot use both Select and ProjectionExpression together in a single
* request, unless the value for Select is SPECIFIC_ATTRIBUTES. (This usage is equivalent
* to specifying ProjectionExpression without any value for Select.)
*
*
*
* If you use the ProjectionExpression parameter, then the value for Select can only be
* SPECIFIC_ATTRIBUTES. Any other value for Select will return an error.
*
*
*
* @param select
* The attributes to be returned in the result. You can retrieve all item attributes, specific item
* attributes, the count of matching items, or in the case of an index, some or all of the attributes
* projected into the index.
*
* -
*
* ALL_ATTRIBUTES - Returns all of the item attributes from the specified table or index. If you
* query a local secondary index, then for each matching item in the index, DynamoDB fetches the entire item
* from the parent table. If the index is configured to project all item attributes, then all of the data can
* be obtained from the local secondary index, and no fetching is required.
*
*
* -
*
* ALL_PROJECTED_ATTRIBUTES - Allowed only when querying an index. Retrieves all attributes that
* have been projected into the index. If the index is configured to project all attributes, this return
* value is equivalent to specifying ALL_ATTRIBUTES.
*
*
* -
*
* COUNT - Returns the number of matching items, rather than the matching items themselves.
*
*
* -
*
* SPECIFIC_ATTRIBUTES - Returns only the attributes listed in ProjectionExpression
* . This return value is equivalent to specifying ProjectionExpression without specifying any
* value for Select.
*
*
* If you query or scan a local secondary index and request only attributes that are projected into that
* index, the operation reads only the index and not the table. If any of the requested attributes are not
* projected into the local secondary index, DynamoDB fetches each of these attributes from the parent table.
* This extra fetching incurs additional throughput cost and latency.
*
*
* If you query or scan a global secondary index, you can only request attributes that are projected into the
* index. Global secondary index queries cannot fetch attributes from the parent table.
*
*
*
*
* If neither Select nor ProjectionExpression are specified, DynamoDB defaults to
* ALL_ATTRIBUTES when accessing a table, and ALL_PROJECTED_ATTRIBUTES when
* accessing an index. You cannot use both Select and ProjectionExpression together
* in a single request, unless the value for Select is SPECIFIC_ATTRIBUTES. (This
* usage is equivalent to specifying ProjectionExpression without any value for
* Select.)
*
*
*
* If you use the ProjectionExpression parameter, then the value for Select can
* only be SPECIFIC_ATTRIBUTES. Any other value for Select will return an error.
*
* @return Returns a reference to this object so that method calls can be chained together.
* @see Select
*/
public ScanRequest withSelect(Select select) {
this.select = select.toString();
return this;
}
/**
*
* This is a legacy parameter. Use FilterExpression instead. For more information, see ScanFilter in the Amazon DynamoDB Developer Guide.
*
*
* @return This is a legacy parameter. Use FilterExpression instead. For more information, see ScanFilter in the Amazon DynamoDB Developer Guide.
*/
public java.util.Map getScanFilter() {
return scanFilter;
}
/**
*
* This is a legacy parameter. Use FilterExpression instead. For more information, see ScanFilter in the Amazon DynamoDB Developer Guide.
*
*
* @param scanFilter
* This is a legacy parameter. Use FilterExpression instead. For more information, see ScanFilter in the Amazon DynamoDB Developer Guide.
*/
public void setScanFilter(java.util.Map scanFilter) {
this.scanFilter = scanFilter;
}
/**
*
* This is a legacy parameter. Use FilterExpression instead. For more information, see ScanFilter in the Amazon DynamoDB Developer Guide.
*
*
* @param scanFilter
* This is a legacy parameter. Use FilterExpression instead. For more information, see ScanFilter in the Amazon DynamoDB Developer Guide.
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest withScanFilter(java.util.Map scanFilter) {
setScanFilter(scanFilter);
return this;
}
/**
* Add a single ScanFilter entry
*
* @see ScanRequest#withScanFilter
* @returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest addScanFilterEntry(String key, Condition value) {
if (null == this.scanFilter) {
this.scanFilter = new java.util.HashMap();
}
if (this.scanFilter.containsKey(key))
throw new IllegalArgumentException("Duplicated keys (" + key.toString() + ") are provided.");
this.scanFilter.put(key, value);
return this;
}
/**
* Removes all the entries added into ScanFilter.
*
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest clearScanFilterEntries() {
this.scanFilter = null;
return this;
}
/**
*
* This is a legacy parameter. Use FilterExpression instead. For more information, see ConditionalOperator in the Amazon DynamoDB Developer Guide.
*
*
* @param conditionalOperator
* This is a legacy parameter. Use FilterExpression instead. For more information, see ConditionalOperator in the Amazon DynamoDB Developer Guide.
* @see ConditionalOperator
*/
public void setConditionalOperator(String conditionalOperator) {
this.conditionalOperator = conditionalOperator;
}
/**
*
* This is a legacy parameter. Use FilterExpression instead. For more information, see ConditionalOperator in the Amazon DynamoDB Developer Guide.
*
*
* @return This is a legacy parameter. Use FilterExpression instead. For more information, see ConditionalOperator in the Amazon DynamoDB Developer Guide.
* @see ConditionalOperator
*/
public String getConditionalOperator() {
return this.conditionalOperator;
}
/**
*
* This is a legacy parameter. Use FilterExpression instead. For more information, see ConditionalOperator in the Amazon DynamoDB Developer Guide.
*
*
* @param conditionalOperator
* This is a legacy parameter. Use FilterExpression instead. For more information, see ConditionalOperator in the Amazon DynamoDB Developer Guide.
* @return Returns a reference to this object so that method calls can be chained together.
* @see ConditionalOperator
*/
public ScanRequest withConditionalOperator(String conditionalOperator) {
setConditionalOperator(conditionalOperator);
return this;
}
/**
*
* This is a legacy parameter. Use FilterExpression instead. For more information, see ConditionalOperator in the Amazon DynamoDB Developer Guide.
*
*
* @param conditionalOperator
* This is a legacy parameter. Use FilterExpression instead. For more information, see ConditionalOperator in the Amazon DynamoDB Developer Guide.
* @see ConditionalOperator
*/
public void setConditionalOperator(ConditionalOperator conditionalOperator) {
withConditionalOperator(conditionalOperator);
}
/**
*
* This is a legacy parameter. Use FilterExpression instead. For more information, see ConditionalOperator in the Amazon DynamoDB Developer Guide.
*
*
* @param conditionalOperator
* This is a legacy parameter. Use FilterExpression instead. For more information, see ConditionalOperator in the Amazon DynamoDB Developer Guide.
* @return Returns a reference to this object so that method calls can be chained together.
* @see ConditionalOperator
*/
public ScanRequest withConditionalOperator(ConditionalOperator conditionalOperator) {
this.conditionalOperator = conditionalOperator.toString();
return this;
}
/**
*
* The primary key of the first item that this operation will evaluate. Use the value that was returned for
* LastEvaluatedKey in the previous operation.
*
*
* The data type for ExclusiveStartKey must be String, Number or Binary. No set data types are allowed.
*
*
* In a parallel scan, a Scan request that includes ExclusiveStartKey must specify the
* same segment whose previous Scan returned the corresponding value of LastEvaluatedKey.
*
*
* @return The primary key of the first item that this operation will evaluate. Use the value that was returned for
* LastEvaluatedKey in the previous operation.
*
* The data type for ExclusiveStartKey must be String, Number or Binary. No set data types are
* allowed.
*
*
* In a parallel scan, a Scan request that includes ExclusiveStartKey must specify
* the same segment whose previous Scan returned the corresponding value of
* LastEvaluatedKey.
*/
public java.util.Map getExclusiveStartKey() {
return exclusiveStartKey;
}
/**
*
* The primary key of the first item that this operation will evaluate. Use the value that was returned for
* LastEvaluatedKey in the previous operation.
*
*
* The data type for ExclusiveStartKey must be String, Number or Binary. No set data types are allowed.
*
*
* In a parallel scan, a Scan request that includes ExclusiveStartKey must specify the
* same segment whose previous Scan returned the corresponding value of LastEvaluatedKey.
*
*
* @param exclusiveStartKey
* The primary key of the first item that this operation will evaluate. Use the value that was returned for
* LastEvaluatedKey in the previous operation.
*
* The data type for ExclusiveStartKey must be String, Number or Binary. No set data types are
* allowed.
*
*
* In a parallel scan, a Scan request that includes ExclusiveStartKey must specify
* the same segment whose previous Scan returned the corresponding value of
* LastEvaluatedKey.
*/
public void setExclusiveStartKey(java.util.Map exclusiveStartKey) {
this.exclusiveStartKey = exclusiveStartKey;
}
/**
*
* The primary key of the first item that this operation will evaluate. Use the value that was returned for
* LastEvaluatedKey in the previous operation.
*
*
* The data type for ExclusiveStartKey must be String, Number or Binary. No set data types are allowed.
*
*
* In a parallel scan, a Scan request that includes ExclusiveStartKey must specify the
* same segment whose previous Scan returned the corresponding value of LastEvaluatedKey.
*
*
* @param exclusiveStartKey
* The primary key of the first item that this operation will evaluate. Use the value that was returned for
* LastEvaluatedKey in the previous operation.
*
* The data type for ExclusiveStartKey must be String, Number or Binary. No set data types are
* allowed.
*
*
* In a parallel scan, a Scan request that includes ExclusiveStartKey must specify
* the same segment whose previous Scan returned the corresponding value of
* LastEvaluatedKey.
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest withExclusiveStartKey(java.util.Map exclusiveStartKey) {
setExclusiveStartKey(exclusiveStartKey);
return this;
}
/**
* Add a single ExclusiveStartKey entry
*
* @see ScanRequest#withExclusiveStartKey
* @returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest addExclusiveStartKeyEntry(String key, AttributeValue value) {
if (null == this.exclusiveStartKey) {
this.exclusiveStartKey = new java.util.HashMap();
}
if (this.exclusiveStartKey.containsKey(key))
throw new IllegalArgumentException("Duplicated keys (" + key.toString() + ") are provided.");
this.exclusiveStartKey.put(key, value);
return this;
}
/**
* Removes all the entries added into ExclusiveStartKey.
*
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest clearExclusiveStartKeyEntries() {
this.exclusiveStartKey = null;
return this;
}
/**
* @param returnConsumedCapacity
* @see ReturnConsumedCapacity
*/
public void setReturnConsumedCapacity(String returnConsumedCapacity) {
this.returnConsumedCapacity = returnConsumedCapacity;
}
/**
* @return
* @see ReturnConsumedCapacity
*/
public String getReturnConsumedCapacity() {
return this.returnConsumedCapacity;
}
/**
* @param returnConsumedCapacity
* @return Returns a reference to this object so that method calls can be chained together.
* @see ReturnConsumedCapacity
*/
public ScanRequest withReturnConsumedCapacity(String returnConsumedCapacity) {
setReturnConsumedCapacity(returnConsumedCapacity);
return this;
}
/**
* @param returnConsumedCapacity
* @see ReturnConsumedCapacity
*/
public void setReturnConsumedCapacity(ReturnConsumedCapacity returnConsumedCapacity) {
withReturnConsumedCapacity(returnConsumedCapacity);
}
/**
* @param returnConsumedCapacity
* @return Returns a reference to this object so that method calls can be chained together.
* @see ReturnConsumedCapacity
*/
public ScanRequest withReturnConsumedCapacity(ReturnConsumedCapacity returnConsumedCapacity) {
this.returnConsumedCapacity = returnConsumedCapacity.toString();
return this;
}
/**
*
* For a parallel Scan request, TotalSegments represents the total number of segments into
* which the Scan operation will be divided. The value of TotalSegments corresponds to the
* number of application workers that will perform the parallel scan. For example, if you want to use four
* application threads to scan a table or an index, specify a TotalSegments value of 4.
*
*
* The value for TotalSegments must be greater than or equal to 1, and less than or equal to 1000000.
* If you specify a TotalSegments value of 1, the Scan operation will be sequential rather
* than parallel.
*
*
* If you specify TotalSegments, you must also specify Segment.
*
*
* @param totalSegments
* For a parallel Scan request, TotalSegments represents the total number of
* segments into which the Scan operation will be divided. The value of
* TotalSegments corresponds to the number of application workers that will perform the parallel
* scan. For example, if you want to use four application threads to scan a table or an index, specify a
* TotalSegments value of 4.
*
* The value for TotalSegments must be greater than or equal to 1, and less than or equal to
* 1000000. If you specify a TotalSegments value of 1, the Scan operation will be
* sequential rather than parallel.
*
*
* If you specify TotalSegments, you must also specify Segment.
*/
public void setTotalSegments(Integer totalSegments) {
this.totalSegments = totalSegments;
}
/**
*
* For a parallel Scan request, TotalSegments represents the total number of segments into
* which the Scan operation will be divided. The value of TotalSegments corresponds to the
* number of application workers that will perform the parallel scan. For example, if you want to use four
* application threads to scan a table or an index, specify a TotalSegments value of 4.
*
*
* The value for TotalSegments must be greater than or equal to 1, and less than or equal to 1000000.
* If you specify a TotalSegments value of 1, the Scan operation will be sequential rather
* than parallel.
*
*
* If you specify TotalSegments, you must also specify Segment.
*
*
* @return For a parallel Scan request, TotalSegments represents the total number of
* segments into which the Scan operation will be divided. The value of
* TotalSegments corresponds to the number of application workers that will perform the
* parallel scan. For example, if you want to use four application threads to scan a table or an index,
* specify a TotalSegments value of 4.
*
* The value for TotalSegments must be greater than or equal to 1, and less than or equal to
* 1000000. If you specify a TotalSegments value of 1, the Scan operation will be
* sequential rather than parallel.
*
*
* If you specify TotalSegments, you must also specify Segment.
*/
public Integer getTotalSegments() {
return this.totalSegments;
}
/**
*
* For a parallel Scan request, TotalSegments represents the total number of segments into
* which the Scan operation will be divided. The value of TotalSegments corresponds to the
* number of application workers that will perform the parallel scan. For example, if you want to use four
* application threads to scan a table or an index, specify a TotalSegments value of 4.
*
*
* The value for TotalSegments must be greater than or equal to 1, and less than or equal to 1000000.
* If you specify a TotalSegments value of 1, the Scan operation will be sequential rather
* than parallel.
*
*
* If you specify TotalSegments, you must also specify Segment.
*
*
* @param totalSegments
* For a parallel Scan request, TotalSegments represents the total number of
* segments into which the Scan operation will be divided. The value of
* TotalSegments corresponds to the number of application workers that will perform the parallel
* scan. For example, if you want to use four application threads to scan a table or an index, specify a
* TotalSegments value of 4.
*
* The value for TotalSegments must be greater than or equal to 1, and less than or equal to
* 1000000. If you specify a TotalSegments value of 1, the Scan operation will be
* sequential rather than parallel.
*
*
* If you specify TotalSegments, you must also specify Segment.
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest withTotalSegments(Integer totalSegments) {
setTotalSegments(totalSegments);
return this;
}
/**
*
* For a parallel Scan request, Segment identifies an individual segment to be scanned by
* an application worker.
*
*
* Segment IDs are zero-based, so the first segment is always 0. For example, if you want to use four application
* threads to scan a table or an index, then the first thread specifies a Segment value of 0, the
* second thread specifies 1, and so on.
*
*
* The value of LastEvaluatedKey returned from a parallel Scan request must be used as
* ExclusiveStartKey with the same segment ID in a subsequent Scan operation.
*
*
* The value for Segment must be greater than or equal to 0, and less than the value provided for
* TotalSegments.
*
*
* If you provide Segment, you must also provide TotalSegments.
*
*
* @param segment
* For a parallel Scan request, Segment identifies an individual segment to be
* scanned by an application worker.
*
* Segment IDs are zero-based, so the first segment is always 0. For example, if you want to use four
* application threads to scan a table or an index, then the first thread specifies a Segment
* value of 0, the second thread specifies 1, and so on.
*
*
* The value of LastEvaluatedKey returned from a parallel Scan request must be used
* as ExclusiveStartKey with the same segment ID in a subsequent Scan operation.
*
*
* The value for Segment must be greater than or equal to 0, and less than the value provided
* for TotalSegments.
*
*
* If you provide Segment, you must also provide TotalSegments.
*/
public void setSegment(Integer segment) {
this.segment = segment;
}
/**
*
* For a parallel Scan request, Segment identifies an individual segment to be scanned by
* an application worker.
*
*
* Segment IDs are zero-based, so the first segment is always 0. For example, if you want to use four application
* threads to scan a table or an index, then the first thread specifies a Segment value of 0, the
* second thread specifies 1, and so on.
*
*
* The value of LastEvaluatedKey returned from a parallel Scan request must be used as
* ExclusiveStartKey with the same segment ID in a subsequent Scan operation.
*
*
* The value for Segment must be greater than or equal to 0, and less than the value provided for
* TotalSegments.
*
*
* If you provide Segment, you must also provide TotalSegments.
*
*
* @return For a parallel Scan request, Segment identifies an individual segment to be
* scanned by an application worker.
*
* Segment IDs are zero-based, so the first segment is always 0. For example, if you want to use four
* application threads to scan a table or an index, then the first thread specifies a Segment
* value of 0, the second thread specifies 1, and so on.
*
*
* The value of LastEvaluatedKey returned from a parallel Scan request must be
* used as ExclusiveStartKey with the same segment ID in a subsequent Scan
* operation.
*
*
* The value for Segment must be greater than or equal to 0, and less than the value provided
* for TotalSegments.
*
*
* If you provide Segment, you must also provide TotalSegments.
*/
public Integer getSegment() {
return this.segment;
}
/**
*
* For a parallel Scan request, Segment identifies an individual segment to be scanned by
* an application worker.
*
*
* Segment IDs are zero-based, so the first segment is always 0. For example, if you want to use four application
* threads to scan a table or an index, then the first thread specifies a Segment value of 0, the
* second thread specifies 1, and so on.
*
*
* The value of LastEvaluatedKey returned from a parallel Scan request must be used as
* ExclusiveStartKey with the same segment ID in a subsequent Scan operation.
*
*
* The value for Segment must be greater than or equal to 0, and less than the value provided for
* TotalSegments.
*
*
* If you provide Segment, you must also provide TotalSegments.
*
*
* @param segment
* For a parallel Scan request, Segment identifies an individual segment to be
* scanned by an application worker.
*
* Segment IDs are zero-based, so the first segment is always 0. For example, if you want to use four
* application threads to scan a table or an index, then the first thread specifies a Segment
* value of 0, the second thread specifies 1, and so on.
*
*
* The value of LastEvaluatedKey returned from a parallel Scan request must be used
* as ExclusiveStartKey with the same segment ID in a subsequent Scan operation.
*
*
* The value for Segment must be greater than or equal to 0, and less than the value provided
* for TotalSegments.
*
*
* If you provide Segment, you must also provide TotalSegments.
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest withSegment(Integer segment) {
setSegment(segment);
return this;
}
/**
*
* A string that identifies one or more attributes to retrieve from the specified table or index. These attributes
* can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by
* commas.
*
*
* If no attribute names are specified, then all attributes will be returned. If any of the requested attributes are
* not found, they will not appear in the result.
*
*
* For more information, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
*
*
* @param projectionExpression
* A string that identifies one or more attributes to retrieve from the specified table or index. These
* attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression
* must be separated by commas.
*
* If no attribute names are specified, then all attributes will be returned. If any of the requested
* attributes are not found, they will not appear in the result.
*
*
* For more information, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
*/
public void setProjectionExpression(String projectionExpression) {
this.projectionExpression = projectionExpression;
}
/**
*
* A string that identifies one or more attributes to retrieve from the specified table or index. These attributes
* can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by
* commas.
*
*
* If no attribute names are specified, then all attributes will be returned. If any of the requested attributes are
* not found, they will not appear in the result.
*
*
* For more information, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
*
*
* @return A string that identifies one or more attributes to retrieve from the specified table or index. These
* attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression
* must be separated by commas.
*
* If no attribute names are specified, then all attributes will be returned. If any of the requested
* attributes are not found, they will not appear in the result.
*
*
* For more information, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
*/
public String getProjectionExpression() {
return this.projectionExpression;
}
/**
*
* A string that identifies one or more attributes to retrieve from the specified table or index. These attributes
* can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by
* commas.
*
*
* If no attribute names are specified, then all attributes will be returned. If any of the requested attributes are
* not found, they will not appear in the result.
*
*
* For more information, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
*
*
* @param projectionExpression
* A string that identifies one or more attributes to retrieve from the specified table or index. These
* attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression
* must be separated by commas.
*
* If no attribute names are specified, then all attributes will be returned. If any of the requested
* attributes are not found, they will not appear in the result.
*
*
* For more information, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest withProjectionExpression(String projectionExpression) {
setProjectionExpression(projectionExpression);
return this;
}
/**
*
* A string that contains conditions that DynamoDB applies after the Scan operation, but before the
* data is returned to you. Items that do not satisfy the FilterExpression criteria are not returned.
*
*
*
* A FilterExpression is applied after the items have already been read; the process of filtering does
* not consume any additional read capacity units.
*
*
*
* For more information, see Filter Expressions in the Amazon DynamoDB Developer Guide.
*
*
* @param filterExpression
* A string that contains conditions that DynamoDB applies after the Scan operation, but before
* the data is returned to you. Items that do not satisfy the FilterExpression criteria are not
* returned.
*
* A FilterExpression is applied after the items have already been read; the process of
* filtering does not consume any additional read capacity units.
*
*
*
* For more information, see Filter Expressions in the Amazon DynamoDB Developer Guide.
*/
public void setFilterExpression(String filterExpression) {
this.filterExpression = filterExpression;
}
/**
*
* A string that contains conditions that DynamoDB applies after the Scan operation, but before the
* data is returned to you. Items that do not satisfy the FilterExpression criteria are not returned.
*
*
*
* A FilterExpression is applied after the items have already been read; the process of filtering does
* not consume any additional read capacity units.
*
*
*
* For more information, see Filter Expressions in the Amazon DynamoDB Developer Guide.
*
*
* @return A string that contains conditions that DynamoDB applies after the Scan operation, but before
* the data is returned to you. Items that do not satisfy the FilterExpression criteria are not
* returned.
*
* A FilterExpression is applied after the items have already been read; the process of
* filtering does not consume any additional read capacity units.
*
*
*
* For more information, see Filter Expressions in the Amazon DynamoDB Developer Guide.
*/
public String getFilterExpression() {
return this.filterExpression;
}
/**
*
* A string that contains conditions that DynamoDB applies after the Scan operation, but before the
* data is returned to you. Items that do not satisfy the FilterExpression criteria are not returned.
*
*
*
* A FilterExpression is applied after the items have already been read; the process of filtering does
* not consume any additional read capacity units.
*
*
*
* For more information, see Filter Expressions in the Amazon DynamoDB Developer Guide.
*
*
* @param filterExpression
* A string that contains conditions that DynamoDB applies after the Scan operation, but before
* the data is returned to you. Items that do not satisfy the FilterExpression criteria are not
* returned.
*
* A FilterExpression is applied after the items have already been read; the process of
* filtering does not consume any additional read capacity units.
*
*
*
* For more information, see Filter Expressions in the Amazon DynamoDB Developer Guide.
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest withFilterExpression(String filterExpression) {
setFilterExpression(filterExpression);
return this;
}
/**
*
* One or more substitution tokens for attribute names in an expression. The following are some use cases for using
* ExpressionAttributeNames:
*
*
* -
*
* To access an attribute whose name conflicts with a DynamoDB reserved word.
*
*
* -
*
* To create a placeholder for repeating occurrences of an attribute name in an expression.
*
*
* -
*
* To prevent special characters in an attribute name from being misinterpreted in an expression.
*
*
*
*
* Use the # character in an expression to dereference an attribute name. For example, consider the following
* attribute name:
*
*
* -
*
* Percentile
*
*
*
*
* The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For
* the complete list of reserved words, see Reserved Words in
* the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for
* ExpressionAttributeNames:
*
*
* -
*
* {"#P":"Percentile"}
*
*
*
*
* You could then use this substitution in an expression, as in this example:
*
*
* -
*
* #P = :val
*
*
*
*
*
* Tokens that begin with the : character are expression attribute values, which are placeholders for
* the actual value at runtime.
*
*
*
* For more information on expression attribute names, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
*
*
* @return One or more substitution tokens for attribute names in an expression. The following are some use cases
* for using ExpressionAttributeNames:
*
* -
*
* To access an attribute whose name conflicts with a DynamoDB reserved word.
*
*
* -
*
* To create a placeholder for repeating occurrences of an attribute name in an expression.
*
*
* -
*
* To prevent special characters in an attribute name from being misinterpreted in an expression.
*
*
*
*
* Use the # character in an expression to dereference an attribute name. For example, consider the
* following attribute name:
*
*
* -
*
* Percentile
*
*
*
*
* The name of this attribute conflicts with a reserved word, so it cannot be used directly in an
* expression. (For the complete list of reserved words, see Reserved
* Words in the Amazon DynamoDB Developer Guide). To work around this, you could specify the
* following for ExpressionAttributeNames:
*
*
* -
*
* {"#P":"Percentile"}
*
*
*
*
* You could then use this substitution in an expression, as in this example:
*
*
* -
*
* #P = :val
*
*
*
*
*
* Tokens that begin with the : character are expression attribute values, which are
* placeholders for the actual value at runtime.
*
*
*
* For more information on expression attribute names, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
*/
public java.util.Map getExpressionAttributeNames() {
return expressionAttributeNames;
}
/**
*
* One or more substitution tokens for attribute names in an expression. The following are some use cases for using
* ExpressionAttributeNames:
*
*
* -
*
* To access an attribute whose name conflicts with a DynamoDB reserved word.
*
*
* -
*
* To create a placeholder for repeating occurrences of an attribute name in an expression.
*
*
* -
*
* To prevent special characters in an attribute name from being misinterpreted in an expression.
*
*
*
*
* Use the # character in an expression to dereference an attribute name. For example, consider the following
* attribute name:
*
*
* -
*
* Percentile
*
*
*
*
* The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For
* the complete list of reserved words, see Reserved Words in
* the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for
* ExpressionAttributeNames:
*
*
* -
*
* {"#P":"Percentile"}
*
*
*
*
* You could then use this substitution in an expression, as in this example:
*
*
* -
*
* #P = :val
*
*
*
*
*
* Tokens that begin with the : character are expression attribute values, which are placeholders for
* the actual value at runtime.
*
*
*
* For more information on expression attribute names, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
*
*
* @param expressionAttributeNames
* One or more substitution tokens for attribute names in an expression. The following are some use cases for
* using ExpressionAttributeNames:
*
* -
*
* To access an attribute whose name conflicts with a DynamoDB reserved word.
*
*
* -
*
* To create a placeholder for repeating occurrences of an attribute name in an expression.
*
*
* -
*
* To prevent special characters in an attribute name from being misinterpreted in an expression.
*
*
*
*
* Use the # character in an expression to dereference an attribute name. For example, consider the
* following attribute name:
*
*
* -
*
* Percentile
*
*
*
*
* The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression.
* (For the complete list of reserved words, see Reserved
* Words in the Amazon DynamoDB Developer Guide). To work around this, you could specify the
* following for ExpressionAttributeNames:
*
*
* -
*
* {"#P":"Percentile"}
*
*
*
*
* You could then use this substitution in an expression, as in this example:
*
*
* -
*
* #P = :val
*
*
*
*
*
* Tokens that begin with the : character are expression attribute values, which are
* placeholders for the actual value at runtime.
*
*
*
* For more information on expression attribute names, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
*/
public void setExpressionAttributeNames(java.util.Map expressionAttributeNames) {
this.expressionAttributeNames = expressionAttributeNames;
}
/**
*
* One or more substitution tokens for attribute names in an expression. The following are some use cases for using
* ExpressionAttributeNames:
*
*
* -
*
* To access an attribute whose name conflicts with a DynamoDB reserved word.
*
*
* -
*
* To create a placeholder for repeating occurrences of an attribute name in an expression.
*
*
* -
*
* To prevent special characters in an attribute name from being misinterpreted in an expression.
*
*
*
*
* Use the # character in an expression to dereference an attribute name. For example, consider the following
* attribute name:
*
*
* -
*
* Percentile
*
*
*
*
* The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For
* the complete list of reserved words, see Reserved Words in
* the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for
* ExpressionAttributeNames:
*
*
* -
*
* {"#P":"Percentile"}
*
*
*
*
* You could then use this substitution in an expression, as in this example:
*
*
* -
*
* #P = :val
*
*
*
*
*
* Tokens that begin with the : character are expression attribute values, which are placeholders for
* the actual value at runtime.
*
*
*
* For more information on expression attribute names, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
*
*
* @param expressionAttributeNames
* One or more substitution tokens for attribute names in an expression. The following are some use cases for
* using ExpressionAttributeNames:
*
* -
*
* To access an attribute whose name conflicts with a DynamoDB reserved word.
*
*
* -
*
* To create a placeholder for repeating occurrences of an attribute name in an expression.
*
*
* -
*
* To prevent special characters in an attribute name from being misinterpreted in an expression.
*
*
*
*
* Use the # character in an expression to dereference an attribute name. For example, consider the
* following attribute name:
*
*
* -
*
* Percentile
*
*
*
*
* The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression.
* (For the complete list of reserved words, see Reserved
* Words in the Amazon DynamoDB Developer Guide). To work around this, you could specify the
* following for ExpressionAttributeNames:
*
*
* -
*
* {"#P":"Percentile"}
*
*
*
*
* You could then use this substitution in an expression, as in this example:
*
*
* -
*
* #P = :val
*
*
*
*
*
* Tokens that begin with the : character are expression attribute values, which are
* placeholders for the actual value at runtime.
*
*
*
* For more information on expression attribute names, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest withExpressionAttributeNames(java.util.Map expressionAttributeNames) {
setExpressionAttributeNames(expressionAttributeNames);
return this;
}
/**
* Add a single ExpressionAttributeNames entry
*
* @see ScanRequest#withExpressionAttributeNames
* @returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest addExpressionAttributeNamesEntry(String key, String value) {
if (null == this.expressionAttributeNames) {
this.expressionAttributeNames = new java.util.HashMap();
}
if (this.expressionAttributeNames.containsKey(key))
throw new IllegalArgumentException("Duplicated keys (" + key.toString() + ") are provided.");
this.expressionAttributeNames.put(key, value);
return this;
}
/**
* Removes all the entries added into ExpressionAttributeNames.
*
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest clearExpressionAttributeNamesEntries() {
this.expressionAttributeNames = null;
return this;
}
/**
*
* One or more values that can be substituted in an expression.
*
*
* Use the : (colon) character in an expression to dereference an attribute value. For example, suppose that
* you wanted to check whether the value of the ProductStatus attribute was one of the following:
*
*
* Available | Backordered | Discontinued
*
*
* You would first need to specify ExpressionAttributeValues as follows:
*
*
* { ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"} }
*
*
* You could then use these values in an expression, such as this:
*
*
* ProductStatus IN (:avail, :back, :disc)
*
*
* For more information on expression attribute values, see Condition Expressions in the Amazon DynamoDB Developer Guide.
*
*
* @return One or more values that can be substituted in an expression.
*
* Use the : (colon) character in an expression to dereference an attribute value. For example,
* suppose that you wanted to check whether the value of the ProductStatus attribute was one of
* the following:
*
*
* Available | Backordered | Discontinued
*
*
* You would first need to specify ExpressionAttributeValues as follows:
*
*
* { ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"} }
*
*
* You could then use these values in an expression, such as this:
*
*
* ProductStatus IN (:avail, :back, :disc)
*
*
* For more information on expression attribute values, see Condition Expressions in the Amazon DynamoDB Developer Guide.
*/
public java.util.Map getExpressionAttributeValues() {
return expressionAttributeValues;
}
/**
*
* One or more values that can be substituted in an expression.
*
*
* Use the : (colon) character in an expression to dereference an attribute value. For example, suppose that
* you wanted to check whether the value of the ProductStatus attribute was one of the following:
*
*
* Available | Backordered | Discontinued
*
*
* You would first need to specify ExpressionAttributeValues as follows:
*
*
* { ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"} }
*
*
* You could then use these values in an expression, such as this:
*
*
* ProductStatus IN (:avail, :back, :disc)
*
*
* For more information on expression attribute values, see Condition Expressions in the Amazon DynamoDB Developer Guide.
*
*
* @param expressionAttributeValues
* One or more values that can be substituted in an expression.
*
* Use the : (colon) character in an expression to dereference an attribute value. For example,
* suppose that you wanted to check whether the value of the ProductStatus attribute was one of
* the following:
*
*
* Available | Backordered | Discontinued
*
*
* You would first need to specify ExpressionAttributeValues as follows:
*
*
* { ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"} }
*
*
* You could then use these values in an expression, such as this:
*
*
* ProductStatus IN (:avail, :back, :disc)
*
*
* For more information on expression attribute values, see Condition Expressions in the Amazon DynamoDB Developer Guide.
*/
public void setExpressionAttributeValues(java.util.Map expressionAttributeValues) {
this.expressionAttributeValues = expressionAttributeValues;
}
/**
*
* One or more values that can be substituted in an expression.
*
*
* Use the : (colon) character in an expression to dereference an attribute value. For example, suppose that
* you wanted to check whether the value of the ProductStatus attribute was one of the following:
*
*
* Available | Backordered | Discontinued
*
*
* You would first need to specify ExpressionAttributeValues as follows:
*
*
* { ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"} }
*
*
* You could then use these values in an expression, such as this:
*
*
* ProductStatus IN (:avail, :back, :disc)
*
*
* For more information on expression attribute values, see Condition Expressions in the Amazon DynamoDB Developer Guide.
*
*
* @param expressionAttributeValues
* One or more values that can be substituted in an expression.
*
* Use the : (colon) character in an expression to dereference an attribute value. For example,
* suppose that you wanted to check whether the value of the ProductStatus attribute was one of
* the following:
*
*
* Available | Backordered | Discontinued
*
*
* You would first need to specify ExpressionAttributeValues as follows:
*
*
* { ":avail":{"S":"Available"}, ":back":{"S":"Backordered"}, ":disc":{"S":"Discontinued"} }
*
*
* You could then use these values in an expression, such as this:
*
*
* ProductStatus IN (:avail, :back, :disc)
*
*
* For more information on expression attribute values, see Condition Expressions in the Amazon DynamoDB Developer Guide.
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest withExpressionAttributeValues(java.util.Map expressionAttributeValues) {
setExpressionAttributeValues(expressionAttributeValues);
return this;
}
/**
* Add a single ExpressionAttributeValues entry
*
* @see ScanRequest#withExpressionAttributeValues
* @returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest addExpressionAttributeValuesEntry(String key, AttributeValue value) {
if (null == this.expressionAttributeValues) {
this.expressionAttributeValues = new java.util.HashMap();
}
if (this.expressionAttributeValues.containsKey(key))
throw new IllegalArgumentException("Duplicated keys (" + key.toString() + ") are provided.");
this.expressionAttributeValues.put(key, value);
return this;
}
/**
* Removes all the entries added into ExpressionAttributeValues.
*
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest clearExpressionAttributeValuesEntries() {
this.expressionAttributeValues = null;
return this;
}
/**
*
* A Boolean value that determines the read consistency model during the scan:
*
*
* -
*
* If ConsistentRead is false, then the data returned from Scan might not
* contain the results from other recently completed write operations (PutItem, UpdateItem
* , or DeleteItem).
*
*
* -
*
* If ConsistentRead is true, then all of the write operations that completed before the
* Scan began are guaranteed to be contained in the Scan response.
*
*
*
*
* The default setting for ConsistentRead is false.
*
*
* The ConsistentRead parameter is not supported on global secondary indexes. If you scan a global
* secondary index with ConsistentRead set to true, you will receive a ValidationException
* .
*
*
* @param consistentRead
* A Boolean value that determines the read consistency model during the scan:
*
* -
*
* If ConsistentRead is false, then the data returned from Scan might
* not contain the results from other recently completed write operations (PutItem,
* UpdateItem, or DeleteItem).
*
*
* -
*
* If ConsistentRead is true, then all of the write operations that completed
* before the Scan began are guaranteed to be contained in the Scan response.
*
*
*
*
* The default setting for ConsistentRead is false.
*
*
* The ConsistentRead parameter is not supported on global secondary indexes. If you scan a
* global secondary index with ConsistentRead set to true, you will receive a
* ValidationException.
*/
public void setConsistentRead(Boolean consistentRead) {
this.consistentRead = consistentRead;
}
/**
*
* A Boolean value that determines the read consistency model during the scan:
*
*
* -
*
* If ConsistentRead is false, then the data returned from Scan might not
* contain the results from other recently completed write operations (PutItem, UpdateItem
* , or DeleteItem).
*
*
* -
*
* If ConsistentRead is true, then all of the write operations that completed before the
* Scan began are guaranteed to be contained in the Scan response.
*
*
*
*
* The default setting for ConsistentRead is false.
*
*
* The ConsistentRead parameter is not supported on global secondary indexes. If you scan a global
* secondary index with ConsistentRead set to true, you will receive a ValidationException
* .
*
*
* @return A Boolean value that determines the read consistency model during the scan:
*
* -
*
* If ConsistentRead is false, then the data returned from Scan might
* not contain the results from other recently completed write operations (PutItem,
* UpdateItem, or DeleteItem).
*
*
* -
*
* If ConsistentRead is true, then all of the write operations that completed
* before the Scan began are guaranteed to be contained in the Scan response.
*
*
*
*
* The default setting for ConsistentRead is false.
*
*
* The ConsistentRead parameter is not supported on global secondary indexes. If you scan a
* global secondary index with ConsistentRead set to true, you will receive a
* ValidationException.
*/
public Boolean getConsistentRead() {
return this.consistentRead;
}
/**
*
* A Boolean value that determines the read consistency model during the scan:
*
*
* -
*
* If ConsistentRead is false, then the data returned from Scan might not
* contain the results from other recently completed write operations (PutItem, UpdateItem
* , or DeleteItem).
*
*
* -
*
* If ConsistentRead is true, then all of the write operations that completed before the
* Scan began are guaranteed to be contained in the Scan response.
*
*
*
*
* The default setting for ConsistentRead is false.
*
*
* The ConsistentRead parameter is not supported on global secondary indexes. If you scan a global
* secondary index with ConsistentRead set to true, you will receive a ValidationException
* .
*
*
* @param consistentRead
* A Boolean value that determines the read consistency model during the scan:
*
* -
*
* If ConsistentRead is false, then the data returned from Scan might
* not contain the results from other recently completed write operations (PutItem,
* UpdateItem, or DeleteItem).
*
*
* -
*
* If ConsistentRead is true, then all of the write operations that completed
* before the Scan began are guaranteed to be contained in the Scan response.
*
*
*
*
* The default setting for ConsistentRead is false.
*
*
* The ConsistentRead parameter is not supported on global secondary indexes. If you scan a
* global secondary index with ConsistentRead set to true, you will receive a
* ValidationException.
* @return Returns a reference to this object so that method calls can be chained together.
*/
public ScanRequest withConsistentRead(Boolean consistentRead) {
setConsistentRead(consistentRead);
return this;
}
/**
*
* A Boolean value that determines the read consistency model during the scan:
*
*
* -
*
* If ConsistentRead is false, then the data returned from Scan might not
* contain the results from other recently completed write operations (PutItem, UpdateItem
* , or DeleteItem).
*
*
* -
*
* If ConsistentRead is true, then all of the write operations that completed before the
* Scan began are guaranteed to be contained in the Scan response.
*
*
*
*
* The default setting for ConsistentRead is false.
*
*
* The ConsistentRead parameter is not supported on global secondary indexes. If you scan a global
* secondary index with ConsistentRead set to true, you will receive a ValidationException
* .
*
*
* @return A Boolean value that determines the read consistency model during the scan:
*
* -
*
* If ConsistentRead is false, then the data returned from Scan might
* not contain the results from other recently completed write operations (PutItem,
* UpdateItem, or DeleteItem).
*
*
* -
*
* If ConsistentRead is true, then all of the write operations that completed
* before the Scan began are guaranteed to be contained in the Scan response.
*
*
*
*
* The default setting for ConsistentRead is false.
*
*
* The ConsistentRead parameter is not supported on global secondary indexes. If you scan a
* global secondary index with ConsistentRead set to true, you will receive a
* ValidationException.
*/
public Boolean isConsistentRead() {
return this.consistentRead;
}
/**
* The primary hash and range keys of the first item that this operation will evaluate. Use the value that was
* returned for LastEvaluatedKey in the previous operation.
*
* The data type for ExclusiveStartKey must be String, Number or Binary. No set data types are allowed.
*
* @param hashKey
* a map entry including the name and value of the primary hash key.
* @param rangeKey
* a map entry including the name and value of the primary range key, or null if it is a hash-only table.
*/
public void setExclusiveStartKey(java.util.Map.Entry hashKey, java.util.Map.Entry rangeKey)
throws IllegalArgumentException {
java.util.HashMap exclusiveStartKey = new java.util.HashMap();
if (hashKey != null) {
exclusiveStartKey.put(hashKey.getKey(), hashKey.getValue());
} else {
throw new IllegalArgumentException("hashKey must be non-null object.");
}
if (rangeKey != null) {
exclusiveStartKey.put(rangeKey.getKey(), rangeKey.getValue());
}
setExclusiveStartKey(exclusiveStartKey);
}
/**
* The primary hash and range keys of the first item that this operation will evaluate. Use the value that was
* returned for LastEvaluatedKey in the previous operation.
*
* The data type for ExclusiveStartKey must be String, Number or Binary. No set data types are allowed.
*
* Returns a reference to this object so that method calls can be chained together.
*
* @param hashKey
* a map entry including the name and value of the primary hash key.
* @param rangeKey
* a map entry including the name and value of the primary range key, or null if it is a hash-only table.
*/
public ScanRequest withExclusiveStartKey(java.util.Map.Entry hashKey, java.util.Map.Entry rangeKey)
throws IllegalArgumentException {
setExclusiveStartKey(hashKey, rangeKey);
return this;
}
/**
* Returns a string representation of this object. This is useful for testing and debugging. Sensitive data will be
* redacted from this string using a placeholder value.
*
* @return A string representation of this object.
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("{");
if (getTableName() != null)
sb.append("TableName: ").append(getTableName()).append(",");
if (getIndexName() != null)
sb.append("IndexName: ").append(getIndexName()).append(",");
if (getAttributesToGet() != null)
sb.append("AttributesToGet: ").append(getAttributesToGet()).append(",");
if (getLimit() != null)
sb.append("Limit: ").append(getLimit()).append(",");
if (getSelect() != null)
sb.append("Select: ").append(getSelect()).append(",");
if (getScanFilter() != null)
sb.append("ScanFilter: ").append(getScanFilter()).append(",");
if (getConditionalOperator() != null)
sb.append("ConditionalOperator: ").append(getConditionalOperator()).append(",");
if (getExclusiveStartKey() != null)
sb.append("ExclusiveStartKey: ").append(getExclusiveStartKey()).append(",");
if (getReturnConsumedCapacity() != null)
sb.append("ReturnConsumedCapacity: ").append(getReturnConsumedCapacity()).append(",");
if (getTotalSegments() != null)
sb.append("TotalSegments: ").append(getTotalSegments()).append(",");
if (getSegment() != null)
sb.append("Segment: ").append(getSegment()).append(",");
if (getProjectionExpression() != null)
sb.append("ProjectionExpression: ").append(getProjectionExpression()).append(",");
if (getFilterExpression() != null)
sb.append("FilterExpression: ").append(getFilterExpression()).append(",");
if (getExpressionAttributeNames() != null)
sb.append("ExpressionAttributeNames: ").append(getExpressionAttributeNames()).append(",");
if (getExpressionAttributeValues() != null)
sb.append("ExpressionAttributeValues: ").append(getExpressionAttributeValues()).append(",");
if (getConsistentRead() != null)
sb.append("ConsistentRead: ").append(getConsistentRead());
sb.append("}");
return sb.toString();
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (obj instanceof ScanRequest == false)
return false;
ScanRequest other = (ScanRequest) obj;
if (other.getTableName() == null ^ this.getTableName() == null)
return false;
if (other.getTableName() != null && other.getTableName().equals(this.getTableName()) == false)
return false;
if (other.getIndexName() == null ^ this.getIndexName() == null)
return false;
if (other.getIndexName() != null && other.getIndexName().equals(this.getIndexName()) == false)
return false;
if (other.getAttributesToGet() == null ^ this.getAttributesToGet() == null)
return false;
if (other.getAttributesToGet() != null && other.getAttributesToGet().equals(this.getAttributesToGet()) == false)
return false;
if (other.getLimit() == null ^ this.getLimit() == null)
return false;
if (other.getLimit() != null && other.getLimit().equals(this.getLimit()) == false)
return false;
if (other.getSelect() == null ^ this.getSelect() == null)
return false;
if (other.getSelect() != null && other.getSelect().equals(this.getSelect()) == false)
return false;
if (other.getScanFilter() == null ^ this.getScanFilter() == null)
return false;
if (other.getScanFilter() != null && other.getScanFilter().equals(this.getScanFilter()) == false)
return false;
if (other.getConditionalOperator() == null ^ this.getConditionalOperator() == null)
return false;
if (other.getConditionalOperator() != null && other.getConditionalOperator().equals(this.getConditionalOperator()) == false)
return false;
if (other.getExclusiveStartKey() == null ^ this.getExclusiveStartKey() == null)
return false;
if (other.getExclusiveStartKey() != null && other.getExclusiveStartKey().equals(this.getExclusiveStartKey()) == false)
return false;
if (other.getReturnConsumedCapacity() == null ^ this.getReturnConsumedCapacity() == null)
return false;
if (other.getReturnConsumedCapacity() != null && other.getReturnConsumedCapacity().equals(this.getReturnConsumedCapacity()) == false)
return false;
if (other.getTotalSegments() == null ^ this.getTotalSegments() == null)
return false;
if (other.getTotalSegments() != null && other.getTotalSegments().equals(this.getTotalSegments()) == false)
return false;
if (other.getSegment() == null ^ this.getSegment() == null)
return false;
if (other.getSegment() != null && other.getSegment().equals(this.getSegment()) == false)
return false;
if (other.getProjectionExpression() == null ^ this.getProjectionExpression() == null)
return false;
if (other.getProjectionExpression() != null && other.getProjectionExpression().equals(this.getProjectionExpression()) == false)
return false;
if (other.getFilterExpression() == null ^ this.getFilterExpression() == null)
return false;
if (other.getFilterExpression() != null && other.getFilterExpression().equals(this.getFilterExpression()) == false)
return false;
if (other.getExpressionAttributeNames() == null ^ this.getExpressionAttributeNames() == null)
return false;
if (other.getExpressionAttributeNames() != null && other.getExpressionAttributeNames().equals(this.getExpressionAttributeNames()) == false)
return false;
if (other.getExpressionAttributeValues() == null ^ this.getExpressionAttributeValues() == null)
return false;
if (other.getExpressionAttributeValues() != null && other.getExpressionAttributeValues().equals(this.getExpressionAttributeValues()) == false)
return false;
if (other.getConsistentRead() == null ^ this.getConsistentRead() == null)
return false;
if (other.getConsistentRead() != null && other.getConsistentRead().equals(this.getConsistentRead()) == false)
return false;
return true;
}
@Override
public int hashCode() {
final int prime = 31;
int hashCode = 1;
hashCode = prime * hashCode + ((getTableName() == null) ? 0 : getTableName().hashCode());
hashCode = prime * hashCode + ((getIndexName() == null) ? 0 : getIndexName().hashCode());
hashCode = prime * hashCode + ((getAttributesToGet() == null) ? 0 : getAttributesToGet().hashCode());
hashCode = prime * hashCode + ((getLimit() == null) ? 0 : getLimit().hashCode());
hashCode = prime * hashCode + ((getSelect() == null) ? 0 : getSelect().hashCode());
hashCode = prime * hashCode + ((getScanFilter() == null) ? 0 : getScanFilter().hashCode());
hashCode = prime * hashCode + ((getConditionalOperator() == null) ? 0 : getConditionalOperator().hashCode());
hashCode = prime * hashCode + ((getExclusiveStartKey() == null) ? 0 : getExclusiveStartKey().hashCode());
hashCode = prime * hashCode + ((getReturnConsumedCapacity() == null) ? 0 : getReturnConsumedCapacity().hashCode());
hashCode = prime * hashCode + ((getTotalSegments() == null) ? 0 : getTotalSegments().hashCode());
hashCode = prime * hashCode + ((getSegment() == null) ? 0 : getSegment().hashCode());
hashCode = prime * hashCode + ((getProjectionExpression() == null) ? 0 : getProjectionExpression().hashCode());
hashCode = prime * hashCode + ((getFilterExpression() == null) ? 0 : getFilterExpression().hashCode());
hashCode = prime * hashCode + ((getExpressionAttributeNames() == null) ? 0 : getExpressionAttributeNames().hashCode());
hashCode = prime * hashCode + ((getExpressionAttributeValues() == null) ? 0 : getExpressionAttributeValues().hashCode());
hashCode = prime * hashCode + ((getConsistentRead() == null) ? 0 : getConsistentRead().hashCode());
return hashCode;
}
@Override
public ScanRequest clone() {
return (ScanRequest) super.clone();
}
}