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Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2019 TIBCO Software Inc. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* JasperReports is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with JasperReports. If not, see .
*/
package net.sf.jasperreports.engine;
import net.sf.jasperreports.engine.util.DeduplicableRegistry;
/**
* Interface implemented by objects that can be deduplicated by detecting
* previously created identical instances.
*
* @author Lucian Chirita ([email protected])
* @see DeduplicableRegistry
*/
public interface Deduplicable
{
/**
* Returns a hash code to be used for the deduplicate map.
*
* The returned hash code should be consitent wiwh {@link #isIdentical(Object)},
* i.e. if two objects are identical they should have the same hash code.
*
* @return deduplication hash code
*/
int getHashCode();
/**
* Determines if this instance is identical to another object.
*
* @param object the object to compare with this instance
* @return true
if the two objects are identical and can be deduplicated
*/
boolean isIdentical(Object object);
}