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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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* See the License for the specific language governing permissions and
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*/
package org.apache.commons.collections.functors;
import java.io.Serializable;
import org.apache.commons.collections.Predicate;
Predicate implementation that returns true if the input is the same object
as the one stored in this predicate.
Author: Stephen Colebourne Since: Commons Collections 3.0 Version: $Revision: 646777 $ $Date: 2008-04-10 14:33:15 +0200 (Thu, 10 Apr 2008) $
/**
* Predicate implementation that returns true if the input is the same object
* as the one stored in this predicate.
*
* @since Commons Collections 3.0
* @version $Revision: 646777 $ $Date: 2008-04-10 14:33:15 +0200 (Thu, 10 Apr 2008) $
*
* @author Stephen Colebourne
*/
public final class IdentityPredicate implements Predicate, Serializable {
Serial version UID /** Serial version UID */
private static final long serialVersionUID = -89901658494523293L;
The value to compare to /** The value to compare to */
private final Object iValue;
Factory to create the identity predicate.
Params: - object – the object to compare to
Throws: - IllegalArgumentException – if the predicate is null
Returns: the predicate
/**
* Factory to create the identity predicate.
*
* @param object the object to compare to
* @return the predicate
* @throws IllegalArgumentException if the predicate is null
*/
public static Predicate getInstance(Object object) {
if (object == null) {
return NullPredicate.INSTANCE;
}
return new IdentityPredicate(object);
}
Constructor that performs no validation.
Use getInstance
if you want that.
Params: - object – the object to compare to
/**
* Constructor that performs no validation.
* Use <code>getInstance</code> if you want that.
*
* @param object the object to compare to
*/
public IdentityPredicate(Object object) {
super();
iValue = object;
}
Evaluates the predicate returning true if the input object is identical to
the stored object.
Params: - object – the input object
Returns: true if input is the same object as the stored value
/**
* Evaluates the predicate returning true if the input object is identical to
* the stored object.
*
* @param object the input object
* @return true if input is the same object as the stored value
*/
public boolean evaluate(Object object) {
return (iValue == object);
}
Gets the value.
Returns: the value Since: Commons Collections 3.1
/**
* Gets the value.
*
* @return the value
* @since Commons Collections 3.1
*/
public Object getValue() {
return iValue;
}
}