//========================================================================
//$Id: RewriteRegexRule.java 966 2008-04-17 13:53:44Z gregw $
//Copyright 2004-2005 Mort Bay Consulting Pty. Ltd.
//------------------------------------------------------------------------
//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 org.mortbay.jetty.handler.rewrite;
import java.io.IOException;
import java.util.regex.Matcher;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Rewrite the URI by matching with a regular expression.
* The replacement string may use $n" to replace the nth capture group.
*/
public class RewriteRegexRule extends RegexRule
{
private String _replacement;
/* ------------------------------------------------------------ */
public RewriteRegexRule()
{
_handling = false;
_terminating = false;
}
/* ------------------------------------------------------------ */
/**
* Whenever a match is found, it replaces with this value.
*
* @param replacement the replacement string.
*/
public void setReplacement(String replacement)
{
_replacement = replacement;
}
/* ------------------------------------------------------------ */
/* (non-Javadoc)
* @see org.mortbay.jetty.handler.rules.RegexRule#apply(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, java.util.regex.Matcher)
*/
public String apply(String target, HttpServletRequest request, HttpServletResponse response, Matcher matcher) throws IOException
{
target=_replacement;
for (int g=1;g<=matcher.groupCount();g++)
{
String group = matcher.group(g);
target=target.replaceAll("\\$"+g,group);
}
return target;
}
/* ------------------------------------------------------------ */
/**
* Returns the replacement string.
*/
public String toString()
{
return super.toString()+"["+_replacement+"]";
}
}