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'databene commons' is an open source Java library by Volker Bergmann.
It provides extensions to the Java core library by utility classes, abstract concepts
and concrete implementations.
/*
* Copyright (C) 2004-2014 Volker Bergmann ([email protected]).
* 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.
* 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,
* 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 org.databene.commons.bean;
import java.util.Arrays;
import org.databene.commons.ArrayFormat;
/**
* Wraps a plain object or an array and provides equals() and hashCode()
* that works consistently for both.
* Created: 09.09.2010 09:53:11
* @since 0.5.4
* @author Volker Bergmann
*/
public class ObjectOrArray {
private Object realObject;
public ObjectOrArray(Object realObject) {
this.realObject = realObject;
}
@Override
public int hashCode() {
if (realObject.getClass().isArray())
return Arrays.hashCode((Object[]) realObject);
else
return realObject.hashCode();
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null || getClass() != obj.getClass())
return false;
ObjectOrArray that = (ObjectOrArray) obj;
if (this.realObject.getClass().isArray())
return Arrays.equals((Object[]) this.realObject, (Object[]) that.realObject);
else
return this.realObject.equals(that.realObject);
}
@Override
public String toString() {
if (realObject.getClass().isArray())
return ArrayFormat.format((Object[]) realObject);
else
return String.valueOf(realObject);
}
}