com.izforge.izpack.rules.XOrCondition Maven / Gradle / Ivy
/*
* IzPack - Copyright 2001-2008 Julien Ponge, All Rights Reserved.
*
* http://izpack.org/
* http://izpack.codehaus.org/
*
* Copyright 2007 Dennis Reil
*
* 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 com.izforge.izpack.rules;
import com.izforge.izpack.util.Debug;
import net.n3.nanoxml.XMLElement;
/**
* @author Dennis Reil,
* @version $Id: XOrCondition.java,v 1.1 2006/09/29 14:40:38 dennis Exp $
*/
public class XOrCondition extends OrCondition
{
/**
*
*/
private static final long serialVersionUID = 3148555083095194992L;
/**
*
*/
public XOrCondition()
{
super();
}
/**
* @param operand1
* @param operand2
*/
public XOrCondition(Condition operand1, Condition operand2)
{
super(operand1, operand2);
}
/*
* (non-Javadoc)
*
* @see de.reddot.installer.rules.Condition#readFromXML(net.n3.nanoxml.XMLElement)
*/
public void readFromXML(XMLElement xmlcondition)
{
try
{
if (xmlcondition.getChildrenCount() != 2)
{
Debug.log("xor-condition needs two conditions as operands");
return;
}
this.leftoperand = RulesEngine.analyzeCondition(xmlcondition.getChildAtIndex(0));
this.rightoperand = RulesEngine.analyzeCondition(xmlcondition.getChildAtIndex(1));
}
catch (Exception e)
{
Debug.log("missing element in xor-condition");
}
}
public boolean isTrue()
{
boolean op1true = leftoperand.isTrue();
boolean op2true = rightoperand.isTrue();
if (op1true && op2true)
{
// in case where both are true
return false;
}
return op1true || op2true;
}
/* (non-Javadoc)
* @see com.izforge.izpack.rules.OrCondition#getDependenciesDetails()
*/
public String getDependenciesDetails()
{
StringBuffer details = new StringBuffer();
details.append(this.id);
details.append(" depends on:- ");
details.append(leftoperand.getDependenciesDetails());
details.append("
XOR - ");
details.append(rightoperand.getDependenciesDetails());
details.append("
");
return details.toString();
}
}