com.amazonaws.services.dynamodbv2.model.GetItemRequest Maven / Gradle / Ivy
Show all versions of aws-java-sdk-dynamodb Show documentation
/*
* 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 GetItem operation.
*
*/
public class GetItemRequest extends AmazonWebServiceRequest implements
Serializable, Cloneable {
/**
*
* The name of the table containing the requested item.
*
*/
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 simple primary key, you only need to provide a value for the
* partition key. For a composite primary key, you must provide values for
* both the partition key and the sort key.
*
*/
private java.util.Map key;
/**
*
*
* 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.List attributesToGet;
/**
*
* Determines the read consistency model: If set to true, then
* the operation uses strongly consistent reads; otherwise, the operation
* uses eventually consistent reads.
*
*/
private Boolean consistentRead;
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, see Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
*
* ProjectionExpression replaces the legacy AttributesToGet
* parameter.
*
*
*/
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, 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.
*
*/
private java.util.Map expressionAttributeNames;
/**
* Default constructor for GetItemRequest object. Callers should use the
* setter or fluent setter (with...) methods to initialize the 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 simple primary key, you only need to provide a
* value for the partition key. For a composite primary key, you must
* provide values for both the partition key and the sort key.
*/
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 simple primary key, you only need to provide a
* value for the partition key. For a composite primary key, you must
* provide values for both the partition key and the sort key.
* @param consistentRead
* Determines the read consistency model: If set to true
* , then the operation uses strongly consistent reads; otherwise,
* the operation uses eventually consistent reads.
*/
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.
*
*
* @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.
*
*
* @return The name of the table containing the requested item.
*/
public String getTableName() {
return this.tableName;
}
/**
*
* The name of the table containing the requested item.
*
*
* @param tableName
* The name of the table containing the requested item.
* @return Returns a reference to this object so that method calls can be
* chained together.
*/
public GetItemRequest withTableName(String tableName) {
setTableName(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 simple primary key, you only need to provide a value for the
* partition key. For a composite primary key, you must provide values for
* both the partition key and the sort key.
*
*
* @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 simple primary key, you only need to provide a
* value for the partition key. For a composite primary key, you
* must provide values for both the partition key and the sort key.
*/
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 simple primary key, you only need to provide a value for the
* partition key. For a composite primary key, you must provide values for
* both the partition key and the sort key.
*
*
* @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 simple primary key, you only need to provide a
* value for the partition key. For a composite primary key, you must
* provide values for both the partition key and the sort key.
*/
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 simple primary key, you only need to provide a value for the
* partition key. For a composite primary key, you must provide values for
* both the partition key and the sort key.
*
*
* @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 simple primary key, you only need to provide a
* value for the partition key. For a composite primary key, you must
* provide values for both the partition key and the sort key.
* @return Returns a reference to this object so that method calls can be
* chained together.
*/
public GetItemRequest withKey(java.util.Map key) {
setKey(key);
return this;
}
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. <p> Returns a reference to
* this object so that method calls can be chained together.
*/
public GetItemRequest clearKeyEntries() {
this.key = null;
return this;
}
/**
*
*
* 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 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
*/
public java.util.List getAttributesToGet() {
return 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 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
*/
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, 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.
*
*
* 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, 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
* @return Returns a reference to this object so that method calls can be
* chained together.
*/
public GetItemRequest 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, 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 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
* @return Returns a reference to this object so that method calls can be
* chained together.
*/
public GetItemRequest withAttributesToGet(
java.util.Collection attributesToGet) {
setAttributesToGet(attributesToGet);
return this;
}
/**
*
* Determines the read consistency model: If set to true, then
* the operation uses strongly consistent reads; otherwise, the operation
* uses eventually consistent reads.
*
*
* @param consistentRead
* Determines the read consistency model: If set to true
* , then the operation uses strongly consistent reads; otherwise,
* the operation uses eventually consistent reads.
*/
public void setConsistentRead(Boolean consistentRead) {
this.consistentRead = consistentRead;
}
/**
*
* Determines the read consistency model: If set to true, then
* the operation uses strongly consistent reads; otherwise, the operation
* uses eventually consistent reads.
*
*
* @return Determines the read consistency model: If set to
* true, then the operation uses strongly consistent
* reads; otherwise, the operation uses eventually consistent reads.
*/
public Boolean getConsistentRead() {
return this.consistentRead;
}
/**
*
* Determines the read consistency model: If set to true, then
* the operation uses strongly consistent reads; otherwise, the operation
* uses eventually consistent reads.
*
*
* @param consistentRead
* Determines the read consistency model: If set to true
* , then the operation uses strongly consistent reads; otherwise,
* the operation uses eventually consistent reads.
* @return Returns a reference to this object so that method calls can be
* chained together.
*/
public GetItemRequest withConsistentRead(Boolean consistentRead) {
setConsistentRead(consistentRead);
return this;
}
/**
*
* Determines the read consistency model: If set to true, then
* the operation uses strongly consistent reads; otherwise, the operation
* uses eventually consistent reads.
*
*
* @return Determines the read consistency model: If set to
* true, then the operation uses strongly consistent
* reads; otherwise, the operation uses eventually consistent reads.
*/
public Boolean isConsistentRead() {
return this.consistentRead;
}
/**
* @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 GetItemRequest withReturnConsumedCapacity(
String returnConsumedCapacity) {
setReturnConsumedCapacity(returnConsumedCapacity);
return this;
}
/**
* @param returnConsumedCapacity
* @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 GetItemRequest withReturnConsumedCapacity(
ReturnConsumedCapacity returnConsumedCapacity) {
setReturnConsumedCapacity(returnConsumedCapacity);
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, see Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
*
* ProjectionExpression replaces the legacy AttributesToGet
* parameter.
*
*
*
* @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, see Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
*
* ProjectionExpression replaces the legacy
* AttributesToGet parameter.
*
*/
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, see Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
*
* ProjectionExpression replaces the legacy AttributesToGet
* parameter.
*
*
*
* @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, see Accessing Item Attributes in the Amazon DynamoDB
* Developer Guide.
*
*
*
* ProjectionExpression replaces the legacy
* AttributesToGet parameter.
*
*/
public String getProjectionExpression() {
return this.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.
*
*
*
* ProjectionExpression replaces the legacy AttributesToGet
* parameter.
*
*
*
* @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, see Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
*
*
*
* ProjectionExpression replaces the legacy
* AttributesToGet parameter.
*
* @return Returns a reference to this object so that method calls can be
* chained together.
*/
public GetItemRequest withProjectionExpression(String projectionExpression) {
setProjectionExpression(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, 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.
*
*
* @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 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, 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.
*
*
* @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 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, 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.
*
*
* @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 Accessing Item Attributes in the Amazon DynamoDB Developer
* Guide.
* @return Returns a reference to this object so that method calls can be
* chained together.
*/
public GetItemRequest withExpressionAttributeNames(
java.util.Map expressionAttributeNames) {
setExpressionAttributeNames(expressionAttributeNames);
return this;
}
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. <p>
* Returns a reference to this object so that method calls can be chained
* together.
*/
public GetItemRequest clearExpressionAttributeNamesEntries() {
this.expressionAttributeNames = null;
return this;
}
/**
* Set the hash and range key attributes of the item.
*
* For a hash-only table, you only need to provide the hash attribute. For a
* hash-and-range table, you must provide both.
*
* @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 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);
}
/**
* Set the hash and range key attributes of the item.
*
* For a hash-only table, you only need to provide the hash attribute. For a
* hash-and-range table, you must provide both.
*
* 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 GetItemRequest withKey(
java.util.Map.Entry hashKey,
java.util.Map.Entry rangeKey)
throws IllegalArgumentException {
setKey(hashKey, rangeKey);
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 (getConsistentRead() != null)
sb.append("ConsistentRead: " + getConsistentRead() + ",");
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 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.getConsistentRead() == null
^ this.getConsistentRead() == null)
return false;
if (other.getConsistentRead() != null
&& other.getConsistentRead().equals(this.getConsistentRead()) == 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 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
+ ((getConsistentRead() == null) ? 0 : getConsistentRead()
.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 GetItemRequest clone() {
return (GetItemRequest) super.clone();
}
}