/*
* 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 com.izforge.izpack.util.VariableSubstitutor;
import net.n3.nanoxml.XMLElement;
import java.util.HashMap;
/**
* @author Dennis Reil, <Dennis.Reil@reddot.de>
*/
public class VariableCondition extends Condition
{
/**
*
*/
private static final long serialVersionUID = 2881336115632480575L;
protected String variablename;
protected String value;
public VariableCondition(String variablename, String value, HashMap packstoremove)
{
super();
this.variablename = variablename;
this.value = value;
}
public VariableCondition(String variablename, String value)
{
super();
this.variablename = variablename;
this.value = value;
}
public VariableCondition()
{
super();
}
public String getValue()
{
return value;
}
public void setValue(String value)
{
this.value = value;
}
public String getVariablename()
{
return variablename;
}
public void setVariablename(String variablename)
{
this.variablename = variablename;
}
/*
* (non-Javadoc)
*
* @see de.reddot.installer.rules.Condition#readFromXML(net.n3.nanoxml.XMLElement)
*/
public void readFromXML(XMLElement xmlcondition)
{
try
{
this.variablename = xmlcondition.getFirstChildNamed("name").getContent();
this.value = xmlcondition.getFirstChildNamed("value").getContent();
if (this.value == null) {
this.value = "";
}
}
catch (Exception e)
{
Debug.log("missing element in <condition type=\"variable\"/>");
}
}
public boolean isTrue()
{
if (this.installdata != null)
{
String val = this.installdata.getVariable(variablename);
if (val == null)
{
return false;
}
else
{
if (value != null) {
VariableSubstitutor vs = new VariableSubstitutor(installdata.getVariables());
value = vs.substituteMultiple(value, null);
val = vs.substituteMultiple(val, null);
} else {
value = "";
}
return val.equals(value);
}
}
else
{
return 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 a value of <b>");
details.append(this.value);
details.append("</b> on variable <b>");
details.append(this.variablename);
details.append(" (current value: ");
details.append(this.installdata.getVariable(variablename));
details.append(")");
details.append("</b><br/>");
return details.toString();
}
}