com.amazonaws.services.simpledb.model.SelectRequest Maven / Gradle / Ivy
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/*
* Copyright 2010-2014 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.simpledb.model;
import java.io.Serializable;
import com.amazonaws.AmazonWebServiceRequest;
/**
* Container for the parameters to the {@link com.amazonaws.services.simpledb.AmazonSimpleDB#select(SelectRequest) Select operation}.
*
* The Select operation returns a set of attributes for
* ItemNames that match the select expression.
* Select is similar to the standard SQL SELECT statement.
*
*
* The total size of the response cannot exceed 1 MB in total size.
* Amazon SimpleDB automatically adjusts the number of items returned per
* page to enforce this limit. For example, if the client asks to
* retrieve 2500 items, but each individual item is 10 kB in size, the
* system returns 100 items and an appropriate NextToken so
* the client can access the next page of results.
*
*
* For information on how to construct select expressions, see Using
* Select to Create Amazon SimpleDB Queries in the Developer Guide.
*
*
* @see com.amazonaws.services.simpledb.AmazonSimpleDB#select(SelectRequest)
*/
public class SelectRequest extends AmazonWebServiceRequest implements Serializable {
/**
* The expression used to query the domain.
*/
private String selectExpression;
/**
* A string informing Amazon SimpleDB where to start the next list of
* ItemNames.
*/
private String nextToken;
/**
* Determines whether or not strong consistency should be enforced when
* data is read from SimpleDB. If true, any data previously
* written to SimpleDB will be returned. Otherwise, results will be
* consistent eventually, and the client may not see data that was
* written immediately before your read.
*/
private Boolean consistentRead;
/**
* Default constructor for a new SelectRequest object. Callers should use the
* setter or fluent setter (with...) methods to initialize this object after creating it.
*/
public SelectRequest() {}
/**
* Constructs a new SelectRequest object.
* Callers should use the setter or fluent setter (with...) methods to
* initialize any additional object members.
*
* @param selectExpression The expression used to query the domain.
*/
public SelectRequest(String selectExpression) {
setSelectExpression(selectExpression);
}
/**
* Constructs a new SelectRequest object.
* Callers should use the setter or fluent setter (with...) methods to
* initialize any additional object members.
*
* @param selectExpression The expression used to query the domain.
* @param consistentRead Determines whether or not strong consistency
* should be enforced when data is read from SimpleDB. If
* true, any data previously written to SimpleDB will be
* returned. Otherwise, results will be consistent eventually, and the
* client may not see data that was written immediately before your read.
*/
public SelectRequest(String selectExpression, Boolean consistentRead) {
setSelectExpression(selectExpression);
setConsistentRead(consistentRead);
}
/**
* The expression used to query the domain.
*
* @return The expression used to query the domain.
*/
public String getSelectExpression() {
return selectExpression;
}
/**
* The expression used to query the domain.
*
* @param selectExpression The expression used to query the domain.
*/
public void setSelectExpression(String selectExpression) {
this.selectExpression = selectExpression;
}
/**
* The expression used to query the domain.
*
* Returns a reference to this object so that method calls can be chained together.
*
* @param selectExpression The expression used to query the domain.
*
* @return A reference to this updated object so that method calls can be chained
* together.
*/
public SelectRequest withSelectExpression(String selectExpression) {
this.selectExpression = selectExpression;
return this;
}
/**
* A string informing Amazon SimpleDB where to start the next list of
* ItemNames.
*
* @return A string informing Amazon SimpleDB where to start the next list of
* ItemNames.
*/
public String getNextToken() {
return nextToken;
}
/**
* A string informing Amazon SimpleDB where to start the next list of
* ItemNames.
*
* @param nextToken A string informing Amazon SimpleDB where to start the next list of
* ItemNames.
*/
public void setNextToken(String nextToken) {
this.nextToken = nextToken;
}
/**
* A string informing Amazon SimpleDB where to start the next list of
* ItemNames.
*
* Returns a reference to this object so that method calls can be chained together.
*
* @param nextToken A string informing Amazon SimpleDB where to start the next list of
* ItemNames.
*
* @return A reference to this updated object so that method calls can be chained
* together.
*/
public SelectRequest withNextToken(String nextToken) {
this.nextToken = nextToken;
return this;
}
/**
* Determines whether or not strong consistency should be enforced when
* data is read from SimpleDB. If true, any data previously
* written to SimpleDB will be returned. Otherwise, results will be
* consistent eventually, and the client may not see data that was
* written immediately before your read.
*
* @return Determines whether or not strong consistency should be enforced when
* data is read from SimpleDB. If true, any data previously
* written to SimpleDB will be returned. Otherwise, results will be
* consistent eventually, and the client may not see data that was
* written immediately before your read.
*/
public Boolean isConsistentRead() {
return consistentRead;
}
/**
* Determines whether or not strong consistency should be enforced when
* data is read from SimpleDB. If true, any data previously
* written to SimpleDB will be returned. Otherwise, results will be
* consistent eventually, and the client may not see data that was
* written immediately before your read.
*
* @param consistentRead Determines whether or not strong consistency should be enforced when
* data is read from SimpleDB. If true, any data previously
* written to SimpleDB will be returned. Otherwise, results will be
* consistent eventually, and the client may not see data that was
* written immediately before your read.
*/
public void setConsistentRead(Boolean consistentRead) {
this.consistentRead = consistentRead;
}
/**
* Determines whether or not strong consistency should be enforced when
* data is read from SimpleDB. If true, any data previously
* written to SimpleDB will be returned. Otherwise, results will be
* consistent eventually, and the client may not see data that was
* written immediately before your read.
*
* Returns a reference to this object so that method calls can be chained together.
*
* @param consistentRead Determines whether or not strong consistency should be enforced when
* data is read from SimpleDB. If true, any data previously
* written to SimpleDB will be returned. Otherwise, results will be
* consistent eventually, and the client may not see data that was
* written immediately before your read.
*
* @return A reference to this updated object so that method calls can be chained
* together.
*/
public SelectRequest withConsistentRead(Boolean consistentRead) {
this.consistentRead = consistentRead;
return this;
}
/**
* Determines whether or not strong consistency should be enforced when
* data is read from SimpleDB. If true, any data previously
* written to SimpleDB will be returned. Otherwise, results will be
* consistent eventually, and the client may not see data that was
* written immediately before your read.
*
* @return Determines whether or not strong consistency should be enforced when
* data is read from SimpleDB. If true, any data previously
* written to SimpleDB will be returned. Otherwise, results will be
* consistent eventually, and the client may not see data that was
* written immediately before your read.
*/
public Boolean getConsistentRead() {
return consistentRead;
}
/**
* 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 (getSelectExpression() != null) sb.append("SelectExpression: " + getSelectExpression() + ",");
if (getNextToken() != null) sb.append("NextToken: " + getNextToken() + ",");
if (isConsistentRead() != null) sb.append("ConsistentRead: " + isConsistentRead() );
sb.append("}");
return sb.toString();
}
@Override
public int hashCode() {
final int prime = 31;
int hashCode = 1;
hashCode = prime * hashCode + ((getSelectExpression() == null) ? 0 : getSelectExpression().hashCode());
hashCode = prime * hashCode + ((getNextToken() == null) ? 0 : getNextToken().hashCode());
hashCode = prime * hashCode + ((isConsistentRead() == null) ? 0 : isConsistentRead().hashCode());
return hashCode;
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (obj instanceof SelectRequest == false) return false;
SelectRequest other = (SelectRequest)obj;
if (other.getSelectExpression() == null ^ this.getSelectExpression() == null) return false;
if (other.getSelectExpression() != null && other.getSelectExpression().equals(this.getSelectExpression()) == false) return false;
if (other.getNextToken() == null ^ this.getNextToken() == null) return false;
if (other.getNextToken() != null && other.getNextToken().equals(this.getNextToken()) == false) return false;
if (other.isConsistentRead() == null ^ this.isConsistentRead() == null) return false;
if (other.isConsistentRead() != null && other.isConsistentRead().equals(this.isConsistentRead()) == false) return false;
return true;
}
}