com.amazonaws.services.dynamodbv2.model.BatchGetItemRequest Maven / Gradle / Ivy
/*
* Copyright 2010-2016 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;
/**
*
* Represents the input of a BatchGetItem operation.
*
*/
public class BatchGetItemRequest extends AmazonWebServiceRequest implements
Serializable, Cloneable {
/**
*
* A map of one or more table names and, for each table, a map that
* describes one or more items to retrieve from that table. Each table name
* can be used only once per BatchGetItem request.
*
*
* Each element in the map of items to retrieve consists of the following:
*
*
* -
*
* ConsistentRead - If true, a strongly consistent read
* is used; if false (the default), an eventually consistent
* read is used.
*
*
* -
*
* ExpressionAttributeNames - One or more substitution tokens for
* attribute names in the ProjectionExpression parameter. 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 Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* Keys - An array of primary key attribute values that define
* specific items in the table. For each primary key, you must provide
* all of the key 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.
*
*
* -
*
* 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, see Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* AttributesToGet -
*
*
*
* This is a legacy parameter, for backward compatibility. New applications
* should use ProjectionExpression instead. Do not combine legacy
* parameters and expression parameters in a single API call; otherwise,
* 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.
*
*
*
*/
private java.util.Map requestItems;
private String returnConsumedCapacity;
/**
* Default constructor for BatchGetItemRequest object. Callers should use
* the setter or fluent setter (with...) methods to initialize the object
* after creating it.
*/
public BatchGetItemRequest() {
}
/**
* Constructs a new BatchGetItemRequest object. Callers should use the
* setter or fluent setter (with...) methods to initialize any additional
* object members.
*
* @param requestItems
* A map of one or more table names and, for each table, a map that
* describes one or more items to retrieve from that table. Each
* table name can be used only once per BatchGetItem
* request.
*
* Each element in the map of items to retrieve consists of the
* following:
*
*
* -
*
* ConsistentRead - If true, a strongly
* consistent read is used; if false (the default), an
* eventually consistent read is used.
*
*
* -
*
* ExpressionAttributeNames - One or more substitution tokens
* for attribute names in the ProjectionExpression parameter.
* 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 Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* Keys - An array of primary key attribute values that define
* specific items in the table. For each primary key, you must
* provide all of the key 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.
*
*
* -
*
* 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, see Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* AttributesToGet -
*
*
*
* This is a legacy parameter, for backward compatibility. New
* applications should use ProjectionExpression instead. Do
* not combine legacy parameters and expression parameters in a
* single API call; otherwise, 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 BatchGetItemRequest(
java.util.Map requestItems) {
setRequestItems(requestItems);
}
/**
* Constructs a new BatchGetItemRequest object. Callers should use the
* setter or fluent setter (with...) methods to initialize any additional
* object members.
*
* @param requestItems
* A map of one or more table names and, for each table, a map that
* describes one or more items to retrieve from that table. Each
* table name can be used only once per BatchGetItem
* request.
*
* Each element in the map of items to retrieve consists of the
* following:
*
*
* -
*
* ConsistentRead - If true, a strongly
* consistent read is used; if false (the default), an
* eventually consistent read is used.
*
*
* -
*
* ExpressionAttributeNames - One or more substitution tokens
* for attribute names in the ProjectionExpression parameter.
* 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 Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* Keys - An array of primary key attribute values that define
* specific items in the table. For each primary key, you must
* provide all of the key 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.
*
*
* -
*
* 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, see Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* AttributesToGet -
*
*
*
* This is a legacy parameter, for backward compatibility. New
* applications should use ProjectionExpression instead. Do
* not combine legacy parameters and expression parameters in a
* single API call; otherwise, 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.
*
*
* @param returnConsumedCapacity
*/
public BatchGetItemRequest(
java.util.Map requestItems,
String returnConsumedCapacity) {
setRequestItems(requestItems);
setReturnConsumedCapacity(returnConsumedCapacity);
}
/**
* Constructs a new BatchGetItemRequest object. Callers should use the
* setter or fluent setter (with...) methods to initialize any additional
* object members.
*
* @param requestItems
* A map of one or more table names and, for each table, a map that
* describes one or more items to retrieve from that table. Each
* table name can be used only once per BatchGetItem
* request.
*
* Each element in the map of items to retrieve consists of the
* following:
*
*
* -
*
* ConsistentRead - If true, a strongly
* consistent read is used; if false (the default), an
* eventually consistent read is used.
*
*
* -
*
* ExpressionAttributeNames - One or more substitution tokens
* for attribute names in the ProjectionExpression parameter.
* 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 Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* Keys - An array of primary key attribute values that define
* specific items in the table. For each primary key, you must
* provide all of the key 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.
*
*
* -
*
* 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, see Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* AttributesToGet -
*
*
*
* This is a legacy parameter, for backward compatibility. New
* applications should use ProjectionExpression instead. Do
* not combine legacy parameters and expression parameters in a
* single API call; otherwise, 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.
*
*
* @param returnConsumedCapacity
*/
public BatchGetItemRequest(
java.util.Map requestItems,
ReturnConsumedCapacity returnConsumedCapacity) {
setRequestItems(requestItems);
setReturnConsumedCapacity(returnConsumedCapacity.toString());
}
/**
*
* A map of one or more table names and, for each table, a map that
* describes one or more items to retrieve from that table. Each table name
* can be used only once per BatchGetItem request.
*
*
* Each element in the map of items to retrieve consists of the following:
*
*
* -
*
* ConsistentRead - If true, a strongly consistent read
* is used; if false (the default), an eventually consistent
* read is used.
*
*
* -
*
* ExpressionAttributeNames - One or more substitution tokens for
* attribute names in the ProjectionExpression parameter. 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 Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* Keys - An array of primary key attribute values that define
* specific items in the table. For each primary key, you must provide
* all of the key 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.
*
*
* -
*
* 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, see Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* AttributesToGet -
*
*
*
* This is a legacy parameter, for backward compatibility. New applications
* should use ProjectionExpression instead. Do not combine legacy
* parameters and expression parameters in a single API call; otherwise,
* 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 map of one or more table names and, for each table, a map that
* describes one or more items to retrieve from that table. Each
* table name can be used only once per BatchGetItem
* request.
*
* Each element in the map of items to retrieve consists of the
* following:
*
*
* -
*
* ConsistentRead - If true, a strongly
* consistent read is used; if false (the default), an
* eventually consistent read is used.
*
*
* -
*
* ExpressionAttributeNames - One or more substitution tokens
* for attribute names in the ProjectionExpression parameter.
* 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 Accessing Item Attributes in the Amazon DynamoDB
* Developer Guide.
*
*
* -
*
* Keys - An array of primary key attribute values that
* define specific items in the table. For each primary key, you
* must provide all of the key 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.
*
*
* -
*
* 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, see Accessing Item Attributes in the Amazon DynamoDB
* Developer Guide.
*
*
* -
*
* AttributesToGet -
*
*
*
* This is a legacy parameter, for backward compatibility. New
* applications should use ProjectionExpression instead. Do
* not combine legacy parameters and expression parameters in a
* single API call; otherwise, 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.Map getRequestItems() {
return requestItems;
}
/**
*
* A map of one or more table names and, for each table, a map that
* describes one or more items to retrieve from that table. Each table name
* can be used only once per BatchGetItem request.
*
*
* Each element in the map of items to retrieve consists of the following:
*
*
* -
*
* ConsistentRead - If true, a strongly consistent read
* is used; if false (the default), an eventually consistent
* read is used.
*
*
* -
*
* ExpressionAttributeNames - One or more substitution tokens for
* attribute names in the ProjectionExpression parameter. 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 Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* Keys - An array of primary key attribute values that define
* specific items in the table. For each primary key, you must provide
* all of the key 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.
*
*
* -
*
* 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, see Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* AttributesToGet -
*
*
*
* This is a legacy parameter, for backward compatibility. New applications
* should use ProjectionExpression instead. Do not combine legacy
* parameters and expression parameters in a single API call; otherwise,
* 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.
*
*
*
*
* @param requestItems
* A map of one or more table names and, for each table, a map that
* describes one or more items to retrieve from that table. Each
* table name can be used only once per BatchGetItem
* request.
*
* Each element in the map of items to retrieve consists of the
* following:
*
*
* -
*
* ConsistentRead - If true, a strongly
* consistent read is used; if false (the default), an
* eventually consistent read is used.
*
*
* -
*
* ExpressionAttributeNames - One or more substitution tokens
* for attribute names in the ProjectionExpression parameter.
* 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 Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* Keys - An array of primary key attribute values that define
* specific items in the table. For each primary key, you must
* provide all of the key 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.
*
*
* -
*
* 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, see Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* AttributesToGet -
*
*
*
* This is a legacy parameter, for backward compatibility. New
* applications should use ProjectionExpression instead. Do
* not combine legacy parameters and expression parameters in a
* single API call; otherwise, 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 setRequestItems(
java.util.Map requestItems) {
this.requestItems = requestItems;
}
/**
*
* A map of one or more table names and, for each table, a map that
* describes one or more items to retrieve from that table. Each table name
* can be used only once per BatchGetItem request.
*
*
* Each element in the map of items to retrieve consists of the following:
*
*
* -
*
* ConsistentRead - If true, a strongly consistent read
* is used; if false (the default), an eventually consistent
* read is used.
*
*
* -
*
* ExpressionAttributeNames - One or more substitution tokens for
* attribute names in the ProjectionExpression parameter. 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 Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* Keys - An array of primary key attribute values that define
* specific items in the table. For each primary key, you must provide
* all of the key 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.
*
*
* -
*
* 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, see Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* AttributesToGet -
*
*
*
* This is a legacy parameter, for backward compatibility. New applications
* should use ProjectionExpression instead. Do not combine legacy
* parameters and expression parameters in a single API call; otherwise,
* 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.
*
*
*
*
* @param requestItems
* A map of one or more table names and, for each table, a map that
* describes one or more items to retrieve from that table. Each
* table name can be used only once per BatchGetItem
* request.
*
* Each element in the map of items to retrieve consists of the
* following:
*
*
* -
*
* ConsistentRead - If true, a strongly
* consistent read is used; if false (the default), an
* eventually consistent read is used.
*
*
* -
*
* ExpressionAttributeNames - One or more substitution tokens
* for attribute names in the ProjectionExpression parameter.
* 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 Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* Keys - An array of primary key attribute values that define
* specific items in the table. For each primary key, you must
* provide all of the key 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.
*
*
* -
*
* 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, see Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
* -
*
* AttributesToGet -
*
*
*
* This is a legacy parameter, for backward compatibility. New
* applications should use ProjectionExpression instead. Do
* not combine legacy parameters and expression parameters in a
* single API call; otherwise, 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 Returns a reference to this object so that method calls can be
* chained together.
*/
public BatchGetItemRequest withRequestItems(
java.util.Map requestItems) {
setRequestItems(requestItems);
return this;
}
public BatchGetItemRequest addRequestItemsEntry(String key,
KeysAndAttributes value) {
if (null == this.requestItems) {
this.requestItems = new java.util.HashMap();
}
if (this.requestItems.containsKey(key))
throw new IllegalArgumentException("Duplicated keys ("
+ key.toString() + ") are provided.");
this.requestItems.put(key, value);
return this;
}
/**
* Removes all the entries added into RequestItems. <p> Returns a
* reference to this object so that method calls can be chained together.
*/
public BatchGetItemRequest clearRequestItemsEntries() {
this.requestItems = 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 BatchGetItemRequest withReturnConsumedCapacity(
String returnConsumedCapacity) {
setReturnConsumedCapacity(returnConsumedCapacity);
return this;
}
/**
* @param returnConsumedCapacity
* @return Returns a reference to this object so that method calls can be
* chained together.
* @see ReturnConsumedCapacity
*/
public void setReturnConsumedCapacity(
ReturnConsumedCapacity returnConsumedCapacity) {
this.returnConsumedCapacity = returnConsumedCapacity.toString();
}
/**
* @param returnConsumedCapacity
* @return Returns a reference to this object so that method calls can be
* chained together.
* @see ReturnConsumedCapacity
*/
public BatchGetItemRequest withReturnConsumedCapacity(
ReturnConsumedCapacity returnConsumedCapacity) {
setReturnConsumedCapacity(returnConsumedCapacity);
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 (getRequestItems() != null)
sb.append("RequestItems: " + getRequestItems() + ",");
if (getReturnConsumedCapacity() != null)
sb.append("ReturnConsumedCapacity: " + getReturnConsumedCapacity());
sb.append("}");
return sb.toString();
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (obj instanceof BatchGetItemRequest == false)
return false;
BatchGetItemRequest other = (BatchGetItemRequest) obj;
if (other.getRequestItems() == null ^ this.getRequestItems() == null)
return false;
if (other.getRequestItems() != null
&& other.getRequestItems().equals(this.getRequestItems()) == false)
return false;
if (other.getReturnConsumedCapacity() == null
^ this.getReturnConsumedCapacity() == null)
return false;
if (other.getReturnConsumedCapacity() != null
&& other.getReturnConsumedCapacity().equals(
this.getReturnConsumedCapacity()) == false)
return false;
return true;
}
@Override
public int hashCode() {
final int prime = 31;
int hashCode = 1;
hashCode = prime
* hashCode
+ ((getRequestItems() == null) ? 0 : getRequestItems()
.hashCode());
hashCode = prime
* hashCode
+ ((getReturnConsumedCapacity() == null) ? 0
: getReturnConsumedCapacity().hashCode());
return hashCode;
}
@Override
public BatchGetItemRequest clone() {
return (BatchGetItemRequest) super.clone();
}
}