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/*
* Copyright 2010-2015 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 com.amazonaws.AmazonWebServiceRequest;
/**
* Container for the parameters to the {@link com.amazonaws.services.dynamodbv2.AmazonDynamoDB#getItem(GetItemRequest) GetItem operation}.
*
* The GetItem operation returns a set of attributes for the item
* with the given primary key. If there is no matching item,
* GetItem does not return any data.
*
*
* GetItem provides an eventually consistent read by default. If
* your application requires a strongly consistent read, set
* ConsistentRead to true . Although a strongly
* consistent read might take more time than an eventually consistent
* read, it always returns the last updated value.
*
*
* @see com.amazonaws.services.dynamodbv2.AmazonDynamoDB#getItem(GetItemRequest)
*/
public class GetItemRequest extends AmazonWebServiceRequest implements Serializable, Cloneable {
/**
* The name of the table containing the requested item.
*
* Constraints:
* Length: 3 - 255
* Pattern: [a-zA-Z0-9_.-]+
*/
private String tableName;
/**
* A map of attribute names to AttributeValue objects,
* representing the primary key of the item to retrieve.
For the
* primary key, you must provide all of the attributes. For example, with
* a hash type primary key, you only need to provide the hash attribute.
* For a hash-and-range type primary key, you must provide both the hash
* attribute and the range attribute.
*/
private java.util.Map key;
/**
* There is a newer parameter available. Use
* ProjectionExpression instead. Note that if you use
* AttributesToGet and ProjectionExpression at the same
* time, DynamoDB will return a ValidationException exception.
*
This parameter allows you to retrieve attributes of type List or
* Map; however, it cannot retrieve individual elements within a List or
* a Map.
The names of one or more attributes to retrieve.
* If no attribute names are provided, then all attributes will be
* returned. If any of the requested attributes are not found, they will
* not appear in the result.
Note that AttributesToGet has no
* effect on provisioned throughput consumption. DynamoDB determines
* capacity units consumed based on item size, not on the amount of data
* that is returned to an application.
*
* Constraints:
* Length: 1 -
*/
private com.amazonaws.internal.ListWithAutoConstructFlag attributesToGet;
/**
* A value that if set to true, then the operation uses
* strongly consistent reads; otherwise, eventually consistent reads are
* used.
*/
private Boolean consistentRead;
/**
* A value that if set to TOTAL, the response includes
* ConsumedCapacity data for tables and indexes. If set to
* INDEXES, the response includes ConsumedCapacity
* for indexes. If set to NONE (the default),
* ConsumedCapacity is not included in the response.
*
* Constraints:
* Allowed Values: INDEXES, TOTAL, NONE
*/
private String returnConsumedCapacity;
/**
* A string that identifies one or more attributes to retrieve from the
* table. 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, go to Accessing
* Item Attributes in the Amazon DynamoDB Developer Guide.
*/
private String projectionExpression;
/**
* 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,
* go to 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, go to Accessing
* Item Attributes in the Amazon DynamoDB Developer Guide.
*/
private java.util.Map expressionAttributeNames;
/**
* Default constructor for a new GetItemRequest object. Callers should use the
* setter or fluent setter (with...) methods to initialize this object after creating it.
*/
public GetItemRequest() {}
/**
* Constructs a new GetItemRequest 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 item.
* @param key A map of attribute names to AttributeValue objects,
* representing the primary key of the item to retrieve. For the
* primary key, you must provide all of the attributes. For example, with
* a hash type primary key, you only need to provide the hash attribute.
* For a hash-and-range type primary key, you must provide both the hash
* attribute and the range attribute.
*/
public GetItemRequest(String tableName, java.util.Map key) {
setTableName(tableName);
setKey(key);
}
/**
* Constructs a new GetItemRequest 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 item.
* @param key A map of attribute names to AttributeValue objects,
* representing the primary key of the item to retrieve. For the
* primary key, you must provide all of the attributes. For example, with
* a hash type primary key, you only need to provide the hash attribute.
* For a hash-and-range type primary key, you must provide both the hash
* attribute and the range attribute.
* @param consistentRead A value that if set to true, then
* the operation uses strongly consistent reads; otherwise, eventually
* consistent reads are used.
*/
public GetItemRequest(String tableName, java.util.Map key, Boolean consistentRead) {
setTableName(tableName);
setKey(key);
setConsistentRead(consistentRead);
}
/**
* The name of the table containing the requested item.
*
* Constraints:
* Length: 3 - 255
* Pattern: [a-zA-Z0-9_.-]+
*
* @return The name of the table containing the requested item.
*/
public String getTableName() {
return tableName;
}
/**
* The name of the table containing the requested item.
*
* Constraints:
* Length: 3 - 255
* Pattern: [a-zA-Z0-9_.-]+
*
* @param tableName The name of the table containing the requested item.
*/
public void setTableName(String tableName) {
this.tableName = tableName;
}
/**
* The name of the table containing the requested item.
*
* Returns a reference to this object so that method calls can be chained together.
*
* Constraints:
* Length: 3 - 255
* Pattern: [a-zA-Z0-9_.-]+
*
* @param tableName The name of the table containing the requested item.
*
* @return A reference to this updated object so that method calls can be chained
* together.
*/
public GetItemRequest withTableName(String tableName) {
this.tableName = tableName;
return this;
}
/**
* A map of attribute names to AttributeValue objects,
* representing the primary key of the item to retrieve.
For the
* primary key, you must provide all of the attributes. For example, with
* a hash type primary key, you only need to provide the hash attribute.
* For a hash-and-range type primary key, you must provide both the hash
* attribute and the range attribute.
*
* @return A map of attribute names to AttributeValue objects,
* representing the primary key of the item to retrieve.
For the
* primary key, you must provide all of the attributes. For example, with
* a hash type primary key, you only need to provide the hash attribute.
* For a hash-and-range type primary key, you must provide both the hash
* attribute and the range attribute.
*/
public java.util.Map getKey() {
return key;
}
/**
* A map of attribute names to AttributeValue objects,
* representing the primary key of the item to retrieve. For the
* primary key, you must provide all of the attributes. For example, with
* a hash type primary key, you only need to provide the hash attribute.
* For a hash-and-range type primary key, you must provide both the hash
* attribute and the range attribute.
*
* @param key A map of attribute names to AttributeValue objects,
* representing the primary key of the item to retrieve.
For the
* primary key, you must provide all of the attributes. For example, with
* a hash type primary key, you only need to provide the hash attribute.
* For a hash-and-range type primary key, you must provide both the hash
* attribute and the range attribute.
*/
public void setKey(java.util.Map key) {
this.key = key;
}
/**
* A map of attribute names to AttributeValue objects,
* representing the primary key of the item to retrieve. For the
* primary key, you must provide all of the attributes. For example, with
* a hash type primary key, you only need to provide the hash attribute.
* For a hash-and-range type primary key, you must provide both the hash
* attribute and the range attribute.
*
* Returns a reference to this object so that method calls can be chained together.
*
* @param key A map of attribute names to AttributeValue objects,
* representing the primary key of the item to retrieve.
For the
* primary key, you must provide all of the attributes. For example, with
* a hash type primary key, you only need to provide the hash attribute.
* For a hash-and-range type primary key, you must provide both the hash
* attribute and the range attribute.
*
* @return A reference to this updated object so that method calls can be chained
* together.
*/
public GetItemRequest withKey(java.util.Map key) {
setKey(key);
return this;
}
/**
* A map of attribute names to AttributeValue objects,
* representing the primary key of the item to retrieve. For the
* primary key, you must provide all of the attributes. For example, with
* a hash type primary key, you only need to provide the hash attribute.
* For a hash-and-range type primary key, you must provide both the hash
* attribute and the range attribute.
*
* This method accepts the hashKey, rangeKey of Key as
* java.util.Map.Entry objects.
*
* @param hashKey Primary hash key.
* @param rangeKey Primary range key. (null if it a hash-only table)
*/
public void setKey(java.util.Map.Entry hashKey, java.util.Map.Entry rangeKey) throws IllegalArgumentException {
java.util.HashMap key = new java.util.HashMap();
if (hashKey != null) {
key.put(hashKey.getKey(), hashKey.getValue());
} else
throw new IllegalArgumentException("hashKey must be non-null object.");
if (rangeKey != null) {
key.put(rangeKey.getKey(), rangeKey.getValue());
}
setKey(key);
}
/**
* A map of attribute names to AttributeValue objects,
* representing the primary key of the item to retrieve. For the
* primary key, you must provide all of the attributes. For example, with
* a hash type primary key, you only need to provide the hash attribute.
* For a hash-and-range type primary key, you must provide both the hash
* attribute and the range attribute.
*
* This method accepts the hashKey, rangeKey of Key as
* java.util.Map.Entry objects.
*
* Returns a reference to this object so that method calls can be chained together.
*
* @param hashKey Primary hash key.
* @param rangeKey Primary range key. (null if it a hash-only table)
*/
public GetItemRequest withKey(java.util.Map.Entry hashKey, java.util.Map.Entry rangeKey) throws IllegalArgumentException {
setKey(hashKey, rangeKey);
return this;
}
/**
* A map of attribute names to AttributeValue objects,
* representing the primary key of the item to retrieve. For the
* primary key, you must provide all of the attributes. For example, with
* a hash type primary key, you only need to provide the hash attribute.
* For a hash-and-range type primary key, you must provide both the hash
* attribute and the range attribute.
*
* The method adds a new key-value pair into Key parameter, and returns a
* reference to this object so that method calls can be chained together.
*
* @param key The key of the entry to be added into Key.
* @param value The corresponding value of the entry to be added into Key.
*/
public GetItemRequest addKeyEntry(String key, AttributeValue value) {
if (null == this.key) {
this.key = new java.util.HashMap();
}
if (this.key.containsKey(key))
throw new IllegalArgumentException("Duplicated keys (" + key.toString() + ") are provided.");
this.key.put(key, value);
return this;
}
/**
* Removes all the entries added into Key.
*
* Returns a reference to this object so that method calls can be chained together.
*/
public GetItemRequest clearKeyEntries() {
this.key = null;
return this;
}
/**
* There is a newer parameter available. Use
* ProjectionExpression instead. Note that if you use
* AttributesToGet and ProjectionExpression at the same
* time, DynamoDB will return a ValidationException exception.
*
This parameter allows you to retrieve attributes of type List or
* Map; however, it cannot retrieve individual elements within a List or
* a Map.
The names of one or more attributes to retrieve.
* If no attribute names are provided, then all attributes will be
* returned. If any of the requested attributes are not found, they will
* not appear in the result.
Note that AttributesToGet has no
* effect on provisioned throughput consumption. DynamoDB determines
* capacity units consumed based on item size, not on the amount of data
* that is returned to an application.
*
* Constraints:
* Length: 1 -
*
* @return There is a newer parameter available. Use
* ProjectionExpression instead. Note that if you use
* AttributesToGet and ProjectionExpression at the same
* time, DynamoDB will return a ValidationException exception.
*
This parameter allows you to retrieve attributes of type List or
* Map; however, it cannot retrieve individual elements within a List or
* a Map.
The names of one or more attributes to retrieve.
* If no attribute names are provided, then all attributes will be
* returned. If any of the requested attributes are not found, they will
* not appear in the result.
Note that AttributesToGet has no
* effect on provisioned throughput consumption. DynamoDB determines
* capacity units consumed based on item size, not on the amount of data
* that is returned to an application.
*/
public java.util.List getAttributesToGet() {
return attributesToGet;
}
/**
* There is a newer parameter available. Use
* ProjectionExpression instead. Note that if you use
* AttributesToGet and ProjectionExpression at the same
* time, DynamoDB will return a ValidationException exception.
*
This parameter allows you to retrieve attributes of type List or
* Map; however, it cannot retrieve individual elements within a List or
* a Map.
The names of one or more attributes to retrieve.
* If no attribute names are provided, then all attributes will be
* returned. If any of the requested attributes are not found, they will
* not appear in the result.
Note that AttributesToGet has no
* effect on provisioned throughput consumption. DynamoDB determines
* capacity units consumed based on item size, not on the amount of data
* that is returned to an application.
*
* Constraints:
* Length: 1 -
*
* @param attributesToGet There is a newer parameter available. Use
* ProjectionExpression instead. Note that if you use
* AttributesToGet and ProjectionExpression at the same
* time, DynamoDB will return a ValidationException exception.
*
This parameter allows you to retrieve attributes of type List or
* Map; however, it cannot retrieve individual elements within a List or
* a Map.
The names of one or more attributes to retrieve.
* If no attribute names are provided, then all attributes will be
* returned. If any of the requested attributes are not found, they will
* not appear in the result.
Note that AttributesToGet has no
* effect on provisioned throughput consumption. DynamoDB determines
* capacity units consumed based on item size, not on the amount of data
* that is returned to an application.
*/
public void setAttributesToGet(java.util.Collection attributesToGet) {
if (attributesToGet == null) {
this.attributesToGet = null;
return;
}
com.amazonaws.internal.ListWithAutoConstructFlag attributesToGetCopy = new com.amazonaws.internal.ListWithAutoConstructFlag(attributesToGet.size());
attributesToGetCopy.addAll(attributesToGet);
this.attributesToGet = attributesToGetCopy;
}
/**
* There is a newer parameter available. Use
* ProjectionExpression instead. Note that if you use
* AttributesToGet and ProjectionExpression at the same
* time, DynamoDB will return a ValidationException exception.
*
This parameter allows you to retrieve attributes of type List or
* Map; however, it cannot retrieve individual elements within a List or
* a Map.
The names of one or more attributes to retrieve.
* If no attribute names are provided, then all attributes will be
* returned. If any of the requested attributes are not found, they will
* not appear in the result.
Note that AttributesToGet has no
* effect on provisioned throughput consumption. DynamoDB determines
* capacity units consumed based on item size, not on the amount of data
* that is returned to an application.
*
* Returns a reference to this object so that method calls can be chained together.
*
* Constraints:
* Length: 1 -
*
* @param attributesToGet There is a newer parameter available. Use
* ProjectionExpression instead. Note that if you use
* AttributesToGet and ProjectionExpression at the same
* time, DynamoDB will return a ValidationException exception.
*
This parameter allows you to retrieve attributes of type List or
* Map; however, it cannot retrieve individual elements within a List or
* a Map.
The names of one or more attributes to retrieve.
* If no attribute names are provided, then all attributes will be
* returned. If any of the requested attributes are not found, they will
* not appear in the result.
Note that AttributesToGet has no
* effect on provisioned throughput consumption. DynamoDB determines
* capacity units consumed based on item size, not on the amount of data
* that is returned to an application.
*
* @return A reference to this updated object so that method calls can be chained
* together.
*/
public GetItemRequest withAttributesToGet(String... attributesToGet) {
if (getAttributesToGet() == null) setAttributesToGet(new java.util.ArrayList(attributesToGet.length));
for (String value : attributesToGet) {
getAttributesToGet().add(value);
}
return this;
}
/**
* There is a newer parameter available. Use
* ProjectionExpression instead. Note that if you use
* AttributesToGet and ProjectionExpression at the same
* time, DynamoDB will return a ValidationException exception.
*
This parameter allows you to retrieve attributes of type List or
* Map; however, it cannot retrieve individual elements within a List or
* a Map.
The names of one or more attributes to retrieve.
* If no attribute names are provided, then all attributes will be
* returned. If any of the requested attributes are not found, they will
* not appear in the result.
Note that AttributesToGet has no
* effect on provisioned throughput consumption. DynamoDB determines
* capacity units consumed based on item size, not on the amount of data
* that is returned to an application.
*
* Returns a reference to this object so that method calls can be chained together.
*
* Constraints:
* Length: 1 -
*
* @param attributesToGet There is a newer parameter available. Use
* ProjectionExpression instead. Note that if you use
* AttributesToGet and ProjectionExpression at the same
* time, DynamoDB will return a ValidationException exception.
*
This parameter allows you to retrieve attributes of type List or
* Map; however, it cannot retrieve individual elements within a List or
* a Map.
The names of one or more attributes to retrieve.
* If no attribute names are provided, then all attributes will be
* returned. If any of the requested attributes are not found, they will
* not appear in the result.
Note that AttributesToGet has no
* effect on provisioned throughput consumption. DynamoDB determines
* capacity units consumed based on item size, not on the amount of data
* that is returned to an application.
*
* @return A reference to this updated object so that method calls can be chained
* together.
*/
public GetItemRequest withAttributesToGet(java.util.Collection attributesToGet) {
if (attributesToGet == null) {
this.attributesToGet = null;
} else {
com.amazonaws.internal.ListWithAutoConstructFlag attributesToGetCopy = new com.amazonaws.internal.ListWithAutoConstructFlag(attributesToGet.size());
attributesToGetCopy.addAll(attributesToGet);
this.attributesToGet = attributesToGetCopy;
}
return this;
}
/**
* A value that if set to true, then the operation uses
* strongly consistent reads; otherwise, eventually consistent reads are
* used.
*
* @return A value that if set to true, then the operation uses
* strongly consistent reads; otherwise, eventually consistent reads are
* used.
*/
public Boolean isConsistentRead() {
return consistentRead;
}
/**
* A value that if set to true, then the operation uses
* strongly consistent reads; otherwise, eventually consistent reads are
* used.
*
* @param consistentRead A value that if set to true, then the operation uses
* strongly consistent reads; otherwise, eventually consistent reads are
* used.
*/
public void setConsistentRead(Boolean consistentRead) {
this.consistentRead = consistentRead;
}
/**
* A value that if set to true, then the operation uses
* strongly consistent reads; otherwise, eventually consistent reads are
* used.
*
* Returns a reference to this object so that method calls can be chained together.
*
* @param consistentRead A value that if set to true, then the operation uses
* strongly consistent reads; otherwise, eventually consistent reads are
* used.
*
* @return A reference to this updated object so that method calls can be chained
* together.
*/
public GetItemRequest withConsistentRead(Boolean consistentRead) {
this.consistentRead = consistentRead;
return this;
}
/**
* A value that if set to true, then the operation uses
* strongly consistent reads; otherwise, eventually consistent reads are
* used.
*
* @return A value that if set to true, then the operation uses
* strongly consistent reads; otherwise, eventually consistent reads are
* used.
*/
public Boolean getConsistentRead() {
return consistentRead;
}
/**
* A value that if set to TOTAL, the response includes
* ConsumedCapacity data for tables and indexes. If set to
* INDEXES, the response includes ConsumedCapacity
* for indexes. If set to NONE (the default),
* ConsumedCapacity is not included in the response.
*
* Constraints:
* Allowed Values: INDEXES, TOTAL, NONE
*
* @return A value that if set to TOTAL, the response includes
* ConsumedCapacity data for tables and indexes. If set to
* INDEXES, the response includes ConsumedCapacity
* for indexes. If set to NONE (the default),
* ConsumedCapacity is not included in the response.
*
* @see ReturnConsumedCapacity
*/
public String getReturnConsumedCapacity() {
return returnConsumedCapacity;
}
/**
* A value that if set to TOTAL, the response includes
* ConsumedCapacity data for tables and indexes. If set to
* INDEXES, the response includes ConsumedCapacity
* for indexes. If set to NONE (the default),
* ConsumedCapacity is not included in the response.
*
* Constraints:
* Allowed Values: INDEXES, TOTAL, NONE
*
* @param returnConsumedCapacity A value that if set to TOTAL, the response includes
* ConsumedCapacity data for tables and indexes. If set to
* INDEXES, the response includes ConsumedCapacity
* for indexes. If set to NONE (the default),
* ConsumedCapacity is not included in the response.
*
* @see ReturnConsumedCapacity
*/
public void setReturnConsumedCapacity(String returnConsumedCapacity) {
this.returnConsumedCapacity = returnConsumedCapacity;
}
/**
* A value that if set to TOTAL, the response includes
* ConsumedCapacity data for tables and indexes. If set to
* INDEXES, the response includes ConsumedCapacity
* for indexes. If set to NONE (the default),
* ConsumedCapacity is not included in the response.
*
* Returns a reference to this object so that method calls can be chained together.
*
* Constraints:
* Allowed Values: INDEXES, TOTAL, NONE
*
* @param returnConsumedCapacity A value that if set to TOTAL, the response includes
* ConsumedCapacity data for tables and indexes. If set to
* INDEXES, the response includes ConsumedCapacity
* for indexes. If set to NONE (the default),
* ConsumedCapacity is not included in the response.
*
* @return A reference to this updated object so that method calls can be chained
* together.
*
* @see ReturnConsumedCapacity
*/
public GetItemRequest withReturnConsumedCapacity(String returnConsumedCapacity) {
this.returnConsumedCapacity = returnConsumedCapacity;
return this;
}
/**
* A value that if set to TOTAL, the response includes
* ConsumedCapacity data for tables and indexes. If set to
* INDEXES, the response includes ConsumedCapacity
* for indexes. If set to NONE (the default),
* ConsumedCapacity is not included in the response.
*
* Constraints:
* Allowed Values: INDEXES, TOTAL, NONE
*
* @param returnConsumedCapacity A value that if set to TOTAL, the response includes
* ConsumedCapacity data for tables and indexes. If set to
* INDEXES, the response includes ConsumedCapacity
* for indexes. If set to NONE (the default),
* ConsumedCapacity is not included in the response.
*
* @see ReturnConsumedCapacity
*/
public void setReturnConsumedCapacity(ReturnConsumedCapacity returnConsumedCapacity) {
this.returnConsumedCapacity = returnConsumedCapacity.toString();
}
/**
* A value that if set to TOTAL, the response includes
* ConsumedCapacity data for tables and indexes. If set to
* INDEXES, the response includes ConsumedCapacity
* for indexes. If set to NONE (the default),
* ConsumedCapacity is not included in the response.
*
* Returns a reference to this object so that method calls can be chained together.
*
* Constraints:
* Allowed Values: INDEXES, TOTAL, NONE
*
* @param returnConsumedCapacity A value that if set to TOTAL, the response includes
* ConsumedCapacity data for tables and indexes. If set to
* INDEXES, the response includes ConsumedCapacity
* for indexes. If set to NONE (the default),
* ConsumedCapacity is not included in the response.
*
* @return A reference to this updated object so that method calls can be chained
* together.
*
* @see ReturnConsumedCapacity
*/
public GetItemRequest withReturnConsumedCapacity(ReturnConsumedCapacity returnConsumedCapacity) {
this.returnConsumedCapacity = returnConsumedCapacity.toString();
return this;
}
/**
* A string that identifies one or more attributes to retrieve from the
* table. 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, go to Accessing
* Item Attributes in the Amazon DynamoDB Developer Guide.
*
* @return A string that identifies one or more attributes to retrieve from the
* table. 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, go to Accessing
* Item Attributes in the Amazon DynamoDB Developer Guide.
*/
public String getProjectionExpression() {
return projectionExpression;
}
/**
* A string that identifies one or more attributes to retrieve from the
* table. 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, go to Accessing
* Item Attributes in the Amazon DynamoDB Developer Guide.
*
* @param projectionExpression A string that identifies one or more attributes to retrieve from the
* table. 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, go to Accessing
* 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
* table. 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, go to Accessing
* Item Attributes in the Amazon DynamoDB Developer Guide.
*
* Returns a reference to this object so that method calls can be chained together.
*
* @param projectionExpression A string that identifies one or more attributes to retrieve from the
* table. 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, go to Accessing
* Item Attributes in the Amazon DynamoDB Developer Guide.
*
* @return A reference to this updated object so that method calls can be chained
* together.
*/
public GetItemRequest withProjectionExpression(String projectionExpression) {
this.projectionExpression = projectionExpression;
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,
* go to 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, go to Accessing
* 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,
* go to 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, go to Accessing
* 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,
* go to 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, go to Accessing
* 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,
* go to 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, go to Accessing
* 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,
* go to 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, go to Accessing
* Item Attributes in the Amazon DynamoDB Developer Guide.
*
* Returns a reference to this object so that method calls can be chained together.
*
* @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,
* go to 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, go to Accessing
* Item Attributes in the Amazon DynamoDB Developer Guide.
*
* @return A reference to this updated object so that method calls can be chained
* together.
*/
public GetItemRequest withExpressionAttributeNames(java.util.Map expressionAttributeNames) {
setExpressionAttributeNames(expressionAttributeNames);
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,
* go to 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, go to Accessing
* Item Attributes in the Amazon DynamoDB Developer Guide.
*
* The method adds a new key-value pair into ExpressionAttributeNames
* parameter, and returns a reference to this object so that method calls
* can be chained together.
*
* @param key The key of the entry to be added into ExpressionAttributeNames.
* @param value The corresponding value of the entry to be added into ExpressionAttributeNames.
*/
public GetItemRequest 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.
*
* Returns a reference to this object so that method calls can be chained together.
*/
public GetItemRequest clearExpressionAttributeNamesEntries() {
this.expressionAttributeNames = null;
return this;
}
/**
* Returns a string representation of this object; useful for testing and
* debugging.
*
* @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: " + getTableName() + ",");
if (getKey() != null) sb.append("Key: " + getKey() + ",");
if (getAttributesToGet() != null) sb.append("AttributesToGet: " + getAttributesToGet() + ",");
if (isConsistentRead() != null) sb.append("ConsistentRead: " + isConsistentRead() + ",");
if (getReturnConsumedCapacity() != null) sb.append("ReturnConsumedCapacity: " + getReturnConsumedCapacity() + ",");
if (getProjectionExpression() != null) sb.append("ProjectionExpression: " + getProjectionExpression() + ",");
if (getExpressionAttributeNames() != null) sb.append("ExpressionAttributeNames: " + getExpressionAttributeNames() );
sb.append("}");
return sb.toString();
}
@Override
public int hashCode() {
final int prime = 31;
int hashCode = 1;
hashCode = prime * hashCode + ((getTableName() == null) ? 0 : getTableName().hashCode());
hashCode = prime * hashCode + ((getKey() == null) ? 0 : getKey().hashCode());
hashCode = prime * hashCode + ((getAttributesToGet() == null) ? 0 : getAttributesToGet().hashCode());
hashCode = prime * hashCode + ((isConsistentRead() == null) ? 0 : isConsistentRead().hashCode());
hashCode = prime * hashCode + ((getReturnConsumedCapacity() == null) ? 0 : getReturnConsumedCapacity().hashCode());
hashCode = prime * hashCode + ((getProjectionExpression() == null) ? 0 : getProjectionExpression().hashCode());
hashCode = prime * hashCode + ((getExpressionAttributeNames() == null) ? 0 : getExpressionAttributeNames().hashCode());
return hashCode;
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (obj instanceof GetItemRequest == false) return false;
GetItemRequest other = (GetItemRequest)obj;
if (other.getTableName() == null ^ this.getTableName() == null) return false;
if (other.getTableName() != null && other.getTableName().equals(this.getTableName()) == false) return false;
if (other.getKey() == null ^ this.getKey() == null) return false;
if (other.getKey() != null && other.getKey().equals(this.getKey()) == 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.isConsistentRead() == null ^ this.isConsistentRead() == null) return false;
if (other.isConsistentRead() != null && other.isConsistentRead().equals(this.isConsistentRead()) == 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.getProjectionExpression() == null ^ this.getProjectionExpression() == null) return false;
if (other.getProjectionExpression() != null && other.getProjectionExpression().equals(this.getProjectionExpression()) == false) return false;
if (other.getExpressionAttributeNames() == null ^ this.getExpressionAttributeNames() == null) return false;
if (other.getExpressionAttributeNames() != null && other.getExpressionAttributeNames().equals(this.getExpressionAttributeNames()) == false) return false;
return true;
}
@Override
public GetItemRequest clone() {
return (GetItemRequest) super.clone();
}
}