org.databene.commons.bean.ArrayWithIdentity Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of databene-commons Show documentation

'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.

The newest version!

/*
 * Copyright (C) 2004-2015 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;

/**
 * Wrapper for an array which implements {@link #equals(Object)}, {@link #hashCode()} and {@link #toString()}
 * based on the array's element values.
 * Created: 03.02.2012 16:34:14
 * @since 0.5.4
 * @author Volker Bergmann
 */
public class ArrayWithIdentity {

	private Object[] elements;

	public ArrayWithIdentity(Object[] elements) {
	    this.elements = elements;
    }

	public int getElementCount() {
		return elements.length;
	}
	
	// java.lang.Object overrides --------------------------------------------------------------------------------------
	
	@Override
	public int hashCode() {
		return Arrays.hashCode(elements);
    }

	@Override
    public boolean equals(Object obj) {
	    if (this == obj)
		    return true;
	    if (obj == null || getClass() != obj.getClass())
		    return false;
	    ArrayWithIdentity that = (ArrayWithIdentity) obj;
	    return Arrays.equals(this.elements, that.elements);
    }
	
	@Override
	public String toString() {
		return ArrayFormat.format(elements);
    }

}