/*
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* that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright
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* above copyright notice, this list of conditions and the
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* please contact info@exolab.org.
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* 4. Products derived from this Software may not be called "Exolab"
* nor may "Exolab" appear in their names without prior written
* permission of Intalio, Inc. Exolab is a registered
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*
* 5. Due credit should be given to the Exolab Project
* (http://www.exolab.org/).
*
* THIS SOFTWARE IS PROVIDED BY INTALIO, INC. AND CONTRIBUTORS
* ``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
* INTALIO, INC. 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.
*
* Copyright 1999 (C) Intalio, Inc. All Rights Reserved.
*
* $Id: CompareHelper.java 6785 2007-01-29 05:09:59Z ekuns $
*/
package org.castor.xmlctf;
import java.lang.reflect.Array;
/**
* Assists in the comparison of objects. This method is used by generated
* code but is not used within the CTF directly.
*
* @author <a href="mailto:gignoux@intalio.com">Sebastien Gignoux</a>
* @version $Revision: 6785 $ $Date: 2003-10-15 09:17:49 -0600 (Wed, 15 Oct 2003) $
*/
public class CompareHelper {
/**
* Compare two objects. Return true if they are both null or if they are
* equal. This comparison method has special handling for arrays: For
* arrays, each element is compared.
* <p>
* Warning: We will throw a NullPointerException if any element of either
* array is null.
*
* @param o1 first object
* @param o2 second object
* @return true if both objects are both null or otherwise are equal
*/
public static boolean equals(Object o1, Object o2) {
if (o1 == null && o2 == null) {
return true;
}
if ((o1 != null && o2 == null) || (o1 == null && o2 != null)) {
return false;
}
// From now we can safely assume (o1 != null && o2 != null)
if (! o1.getClass().equals(o2.getClass())) {
return false;
}
if (o1.getClass().isArray()) {
return compareArray(o1, o2);
}
return o1.equals(o2);
}
/**
* Compares two arrays, returning true if the arrays contain the same
* values.
* <p>
* Warning: We will throw a NullPointerException if any element of either
* array is null.
*
* @param o1 The first array
* @param o2 The second array
* @return true if the two objects represent arrays with the same values
*/
private static boolean compareArray(Object o1, Object o2) {
int size = Array.getLength(o1);
if (size != Array.getLength(o2))
return false;
Class component = o1.getClass().getComponentType();
if ( ! component.equals(o2.getClass().getComponentType()))
return false;
if (component.isPrimitive()) {
return comparePrimitiveArray(o1, o2);
}
for (int i=0; i < size; ++i) {
if (! Array.get(o1, i).equals(Array.get(o2, i))) {
return false;
}
}
return true;
}
/**
* Compares two arrays of primitive values. The caller should have tested
* that the two array have the same length and that the component type are
* equal.
*
* @param o1 The first array
* @param o2 The second array
* @return true if the two objects represent arrays of the same primitive
* values
*/
public static boolean comparePrimitiveArray(Object o1, Object o2) {
Class component = o1.getClass().getComponentType();
int size = Array.getLength(o1);
if (component.equals(Boolean.TYPE)) {
for (int i=0; i<size; ++i) {
if (Array.getBoolean(o1, i) != Array.getBoolean(o2, i)) {
return false;
}
}
return true;
} else if (component.equals(Byte.TYPE)) {
for (int i=0; i<size; ++i) {
if (Array.getByte(o1, i) != Array.getByte(o2, i)) {
return false;
}
}
return true;
} else if (component.equals(Character.TYPE)) {
for (int i=0; i<size; ++i) {
if (Array.getChar(o1, i) != Array.getChar(o2, i)) {
return false;
}
}
return true;
} else if (component.equals(Double.TYPE)) {
for (int i=0; i<size; ++i) {
if (Array.getDouble(o1, i) != Array.getDouble(o2, i)) {
return false;
}
}
return true;
} else if (component.equals(Float.TYPE)) {
for (int i=0; i<size; ++i) {
if (Array.getFloat(o1, i) != Array.getFloat(o2, i)) {
return false;
}
}
return true;
} else if (component.equals(Integer.TYPE)) {
for (int i=0; i<size; ++i) {
if (Array.getInt(o1, i) != Array.getInt(o2, i)) {
return false;
}
}
return true;
} else if (component.equals(Long.TYPE)) {
for (int i=0; i<size; ++i) {
if (Array.getLong(o1, i) != Array.getLong(o2, i)) {
return false;
}
}
return true;
} else if (component.equals(Short.TYPE)) {
for (int i=0; i<size; ++i) {
if (Array.getShort(o1, i) != Array.getShort(o2, i)) {
return false;
}
}
return true;
} else {
throw new IllegalArgumentException("Unexpected primitive type " + component.toString());
}
}
}