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/*
* Copyright (c) 2001-2004 Ant-Contrib project. All rights reserved.
*
* 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 net.sf.antcontrib.property;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.types.RegularExpression;
import org.apache.tools.ant.util.regexp.Regexp;
/****************************************************************************
* Place class description here.
*
* @author <a href='mailto:mattinger@yahoo.com'>Matthew Inger</a>
* @author <additional author>
*
* @since
*
****************************************************************************/
public class PropertySelector
extends AbstractPropertySetterTask
{
private RegularExpression match;
private String select = "\\0";
private char delim = ',';
private boolean caseSensitive = true;
private boolean distinct = false;
public PropertySelector()
{
super();
}
public void setMatch(String match)
{
this.match = new RegularExpression();
this.match.setPattern(match);
}
public void setSelect(String select)
{
this.select = select;
}
public void setCaseSensitive(boolean caseSensitive)
{
this.caseSensitive = caseSensitive;
}
public void setDelimiter(char delim)
{
this.delim = delim;
}
public void setDistinct(boolean distinct)
{
this.distinct = distinct;
}
protected void validate()
{
super.validate();
if (match == null)
throw new BuildException("No match expression specified.");
}
public void execute()
throws BuildException
{
validate();
int options = 0;
if (!caseSensitive)
options |= Regexp.MATCH_CASE_INSENSITIVE;
Regexp regex = match.getRegexp(project);
Hashtable props = project.getProperties();
Enumeration e = props.keys();
StringBuffer buf = new StringBuffer();
int cnt = 0;
Vector used = new Vector();
while (e.hasMoreElements())
{
String key = (String) (e.nextElement());
if (regex.matches(key, options))
{
String output = select;
Vector groups = regex.getGroups(key, options);
int sz = groups.size();
for (int i = 0; i < sz; i++)
{
String s = (String) (groups.elementAt(i));
RegularExpression result = null;
result = new RegularExpression();
result.setPattern("\\\\" + i);
Regexp sregex = result.getRegexp(project);
output = sregex.substitute(output, s, Regexp.MATCH_DEFAULT);
}
if (!(distinct && used.contains(output)))
{
used.addElement(output);
if (cnt != 0) buf.append(delim);
buf.append(output);
cnt++;
}
}
}
if (buf.length() > 0)
setPropertyValue(buf.toString());
}
}
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