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/*
* Copyright 2011-2016 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;
/**
*
* Represents a set of primary keys and, for each key, the attributes to
* retrieve from the table.
*
*
* For each primary key, you must provide all of the key attributes. For
* example, with a simple primary key, you only need to provide the partition
* key. For a composite primary key, you must provide both the partition
* key and the sort key.
*
*/
public class KeysAndAttributes implements Serializable, Cloneable {
/**
*
* The primary key attribute values that define the items and the attributes
* associated with the items.
*
*/
private java.util.List> keys;
/**
*
* One or more attributes to retrieve from the table or index. If no
* attribute names are specified then all attributes will be returned. If
* any of the specified attributes are not found, they will not appear in
* the result.
*
*/
private java.util.List attributesToGet;
/**
*
* The consistency of a read operation. If set to true, then a
* strongly consistent read is used; otherwise, an eventually consistent
* read is used.
*
*/
private Boolean consistentRead;
/**
*
* 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 ProjectionExpression 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;
/**
*
* The primary key attribute values that define the items and the attributes
* associated with the items.
*
*
* @return The primary key attribute values that define the items and the
* attributes associated with the items.
*/
public java.util.List> getKeys() {
return keys;
}
/**
*
* The primary key attribute values that define the items and the attributes
* associated with the items.
*
*
* @param keys
* The primary key attribute values that define the items and the
* attributes associated with the items.
*/
public void setKeys(
java.util.Collection> keys) {
if (keys == null) {
this.keys = null;
return;
}
this.keys = new java.util.ArrayList>(
keys);
}
/**
*
* The primary key attribute values that define the items and the attributes
* associated with the items.
*
*
* NOTE: This method appends the values to the existing list (if
* any). Use {@link #setKeys(java.util.Collection)} or
* {@link #withKeys(java.util.Collection)} if you want to override the
* existing values.
*
*
* @param keys
* The primary key attribute values that define the items and the
* attributes associated with the items.
* @return Returns a reference to this object so that method calls can be
* chained together.
*/
public KeysAndAttributes withKeys(
java.util.Map... keys) {
if (this.keys == null) {
setKeys(new java.util.ArrayList>(
keys.length));
}
for (java.util.Map ele : keys) {
this.keys.add(ele);
}
return this;
}
/**
*
* The primary key attribute values that define the items and the attributes
* associated with the items.
*
*
* @param keys
* The primary key attribute values that define the items and the
* attributes associated with the items.
* @return Returns a reference to this object so that method calls can be
* chained together.
*/
public KeysAndAttributes withKeys(
java.util.Collection> keys) {
setKeys(keys);
return this;
}
/**
*
* One or more attributes to retrieve from the table or index. If no
* attribute names are specified then all attributes will be returned. If
* any of the specified attributes are not found, they will not appear in
* the result.
*
*
* @return One or more attributes to retrieve from the table or index. If no
* attribute names are specified then all attributes will be
* returned. If any of the specified attributes are not found, they
* will not appear in the result.
*/
public java.util.List getAttributesToGet() {
return attributesToGet;
}
/**
*
* One or more attributes to retrieve from the table or index. If no
* attribute names are specified then all attributes will be returned. If
* any of the specified attributes are not found, they will not appear in
* the result.
*
*
* @param attributesToGet
* One or more attributes to retrieve from the table or index. If no
* attribute names are specified then all attributes will be
* returned. If any of the specified attributes are not found, they
* will not appear in the result.
*/
public void setAttributesToGet(java.util.Collection attributesToGet) {
if (attributesToGet == null) {
this.attributesToGet = null;
return;
}
this.attributesToGet = new java.util.ArrayList(attributesToGet);
}
/**
*
* One or more attributes to retrieve from the table or index. If no
* attribute names are specified then all attributes will be returned. If
* any of the specified attributes are not found, they will not appear in
* the result.
*
*
* 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
* One or more attributes to retrieve from the table or index. If no
* attribute names are specified then all attributes will be
* returned. If any of the specified attributes are not found, they
* will not appear in the result.
* @return Returns a reference to this object so that method calls can be
* chained together.
*/
public KeysAndAttributes withAttributesToGet(String... attributesToGet) {
if (this.attributesToGet == null) {
setAttributesToGet(new java.util.ArrayList(
attributesToGet.length));
}
for (String ele : attributesToGet) {
this.attributesToGet.add(ele);
}
return this;
}
/**
*
* One or more attributes to retrieve from the table or index. If no
* attribute names are specified then all attributes will be returned. If
* any of the specified attributes are not found, they will not appear in
* the result.
*
*
* @param attributesToGet
* One or more attributes to retrieve from the table or index. If no
* attribute names are specified then all attributes will be
* returned. If any of the specified attributes are not found, they
* will not appear in the result.
* @return Returns a reference to this object so that method calls can be
* chained together.
*/
public KeysAndAttributes withAttributesToGet(
java.util.Collection attributesToGet) {
setAttributesToGet(attributesToGet);
return this;
}
/**
*
* The consistency of a read operation. If set to true, then a
* strongly consistent read is used; otherwise, an eventually consistent
* read is used.
*
*
* @param consistentRead
* The consistency of a read operation. If set to true,
* then a strongly consistent read is used; otherwise, an eventually
* consistent read is used.
*/
public void setConsistentRead(Boolean consistentRead) {
this.consistentRead = consistentRead;
}
/**
*
* The consistency of a read operation. If set to true, then a
* strongly consistent read is used; otherwise, an eventually consistent
* read is used.
*
*
* @return The consistency of a read operation. If set to true,
* then a strongly consistent read is used; otherwise, an eventually
* consistent read is used.
*/
public Boolean getConsistentRead() {
return this.consistentRead;
}
/**
*
* The consistency of a read operation. If set to true, then a
* strongly consistent read is used; otherwise, an eventually consistent
* read is used.
*
*
* @param consistentRead
* The consistency of a read operation. If set to true,
* then a strongly consistent read is used; otherwise, an eventually
* consistent read is used.
* @return Returns a reference to this object so that method calls can be
* chained together.
*/
public KeysAndAttributes withConsistentRead(Boolean consistentRead) {
setConsistentRead(consistentRead);
return this;
}
/**
*
* The consistency of a read operation. If set to true, then a
* strongly consistent read is used; otherwise, an eventually consistent
* read is used.
*
*
* @return The consistency of a read operation. If set to true,
* then a strongly consistent read is used; otherwise, an eventually
* consistent read is used.
*/
public Boolean isConsistentRead() {
return this.consistentRead;
}
/**
*
* 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 ProjectionExpression 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
* ProjectionExpression 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 ProjectionExpression 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
* ProjectionExpression 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 ProjectionExpression 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
* ProjectionExpression 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 KeysAndAttributes 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 KeysAndAttributes withExpressionAttributeNames(
java.util.Map expressionAttributeNames) {
setExpressionAttributeNames(expressionAttributeNames);
return this;
}
public KeysAndAttributes 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 KeysAndAttributes 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 (getKeys() != null)
sb.append("Keys: " + getKeys() + ",");
if (getAttributesToGet() != null)
sb.append("AttributesToGet: " + getAttributesToGet() + ",");
if (getConsistentRead() != null)
sb.append("ConsistentRead: " + getConsistentRead() + ",");
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 KeysAndAttributes == false)
return false;
KeysAndAttributes other = (KeysAndAttributes) obj;
if (other.getKeys() == null ^ this.getKeys() == null)
return false;
if (other.getKeys() != null
&& other.getKeys().equals(this.getKeys()) == 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.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
+ ((getKeys() == null) ? 0 : getKeys().hashCode());
hashCode = prime
* hashCode
+ ((getAttributesToGet() == null) ? 0 : getAttributesToGet()
.hashCode());
hashCode = prime
* hashCode
+ ((getConsistentRead() == null) ? 0 : getConsistentRead()
.hashCode());
hashCode = prime
* hashCode
+ ((getProjectionExpression() == null) ? 0
: getProjectionExpression().hashCode());
hashCode = prime
* hashCode
+ ((getExpressionAttributeNames() == null) ? 0
: getExpressionAttributeNames().hashCode());
return hashCode;
}
@Override
public KeysAndAttributes clone() {
try {
return (KeysAndAttributes) super.clone();
} catch (CloneNotSupportedException e) {
throw new IllegalStateException(
"Got a CloneNotSupportedException from Object.clone() "
+ "even though we're Cloneable!", e);
}
}
}