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/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program 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 General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.util;
/**
* This class contains utility methods operating on objects.
*/
public class ObjectUtil
{
/**
* Returns whether the given objects are the same.
* @param object1 the first object, may be null.
* @param object2 the second object, may be null.
* @return whether the objects are the same.
*/
public static boolean equal(Object object1, Object object2)
{
return object1 == null ?
object2 == null :
object1.equals(object2);
}
/**
* Returns the hash code of the given object, or 0 if it is null.
* @param object the object, may be null.
* @return the hash code.
*/
public static int hashCode(Object object)
{
return object == null ? 0 : object.hashCode();
}
/**
* Returns a comparison of the two given objects.
* @param object1 the first object, may be null.
* @param object2 the second object, may be null.
* @return -1, 0, or 1.
* @see Comparable#compareTo(Object)
*/
public static int compare(Comparable object1, Comparable object2)
{
return object1 == null ?
object2 == null ? 0 : -1 :
object2 == null ? 1 : object1.compareTo(object2);
}
}
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