com.izforge.izpack.rules.RefCondition 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 net.n3.nanoxml.XMLElement;
/**
* References an already defined condition
*
* @author Dennis Reil,
*/
public class RefCondition extends Condition
{
/**
*
*/
private static final long serialVersionUID = -2880915036530702269L;
Condition referencedcondition;
private String referencedConditionId;
public RefCondition()
{
this.referencedcondition = null;
this.referencedConditionId = null;
}
/*
* public boolean isTrue(Properties variables) { if (referencedcondition == null) { return
* false; } else { return referencedcondition.isTrue(variables); } }
*/
public void readFromXML(XMLElement xmlcondition)
{
this.referencedConditionId = xmlcondition.getAttribute("refid");
this.referencedcondition = RulesEngine.getCondition(this.referencedConditionId);
}
public boolean isTrue()
{
if (this.referencedConditionId == null)
{
return false;
}
else
{
if (this.referencedcondition == null)
{
this.referencedcondition = RulesEngine.getCondition(this.referencedConditionId);
}
return (this.referencedcondition != null) ? this.referencedcondition.isTrue() : false;
}
}
/* (non-Javadoc)
* @see com.izforge.izpack.rules.Condition#getDependenciesDetails()
*/
public String getDependenciesDetails()
{
StringBuffer details = new StringBuffer();
details.append(this.id);
details.append(" depends on:- ");
details.append(referencedcondition.getDependenciesDetails());
details.append("
");
return details.toString();
}
}