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CIP4 JDF Library for JDF 1.x
/*
*
* The CIP4 Software License, Version 1.0
*
*
* Copyright (c) 2001-2024 The International Cooperation for the Integration of
* Processes in Prepress, Press and Postpress (CIP4). All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* The International Cooperation for the Integration of
* Processes in Prepress, Press and Postpress (www.cip4.org)"
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "CIP4" and "The International Cooperation for the Integration of
* Processes in Prepress, Press and Postpress" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact [email protected].
*
* 5. Products derived from this software may not be called "CIP4",
* nor may "CIP4" appear in their name, without prior written
* permission of the CIP4 organization
*
* Usage of this software in commercial products is subject to restrictions. For
* details please consult [email protected].
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE INTERNATIONAL COOPERATION FOR
* THE INTEGRATION OF PROCESSES IN PREPRESS, PRESS AND POSTPRESS OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the The International Cooperation for the Integration
* of Processes in Prepress, Press and Postpress and was
* originally based on software
* copyright (c) 1999-2001, Heidelberger Druckmaschinen AG
* copyright (c) 1999-2001, Agfa-Gevaert N.V.
*
* For more information on The International Cooperation for the
* Integration of Processes in Prepress, Press and Postpress , please see
*
* hashCode()
*
*
* values in data objects. For example, to calculate the hashCode of a data object, use the methods of this class as follows:
*
*
* int myIntField;
* Object myObject;
*
* public int hashCode()
* {
* // int hash = super.hashCode(); // use when not extending Object
* int hash = 0; // use when extending Object
* hash = HashUtil.hashCode(hash, myIntField);
* hash = HashUtil.hashCode(hash, myObject);
* return hash;
* }
*
*
*
* Hint: Start your hashCode calculation depending on the object your data object extends. If you extend Object initialize your hash value to 0. Otherwise initialize hash to
* super.hashCode(). See the example code.
*
* @author Manfred Steinbach
*/
public class HashUtil extends Object
{
/**
*
*/
public static final int PRIME = 1000003;
private HashUtil()
{ // Prevent an instantiation
super();
}
/**
* @param source
* @param x
* @return
*/
public static final int hashCode(final int source, final boolean x)
{
return PRIME * source + (x ? 1 : 0);
}
/**
* @param source
* @param x
* @return
*/
public static final int hashCode(final int source, final int x)
{
return PRIME * source + x;
}
/**
* @param source
* @param x
* @return
*/
public static final int hashCode(final int source, final long x)
{
return PRIME * source + (int) (PRIME * (x >>> 32) + (x & 0xFFFFFFFF));
}
/**
* @param source
* @param x
* @return
*/
public static final int hashCode(final int source, final float x)
{
return hashCode(source, x == 0 ? 0 : Float.floatToIntBits(x));
}
/**
* @param source
* @param x
* @return
*/
public static final int hashCode(final int source, final double x)
{
return hashCode(source, x == 0 ? 0L : Double.doubleToLongBits(x));
}
/**
* @param source
* @param x
* @return
*/
public static final int hashCode(final int source, final Object x)
{
return (null == x) ? 0 : PRIME * source + x.hashCode();
}
/**
* @param source
* @param c
* @return
*/
public static final int hashCode(int source, final Collection c)
{
if (null != c)
{
for (final Object o : c)
{
source = hashCode(source, o);
}
}
return source;
}
/**
* @param source
* @param x
* @return
*/
public static final int hashCode(int source, final Object[] x)
{
if (null != x)
{
final int len = x.length;
for (int i = 0; i < len; i++)
{
source = hashCode(source, x[i]);
}
}
return source;
}
}
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