// ========================================================================
// Copyright 2008-2009 NEXCOM Systems
// ------------------------------------------------------------------------
// 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.cipango.sipapp.rules.request;
import javax.servlet.sip.SipURI;
import javax.servlet.sip.TelURL;
import javax.servlet.sip.URI;
public class Param implements Extractor
{
private String _param;
public Param(String token, String param)
{
if (!token.equals("uri"))
throw new IllegalArgumentException("Invalid expression: param after " + token);
_param = param;
}
public Object extract(Object input)
{
URI uri = (URI) input;
if (uri.isSipURI())
return ((SipURI) uri).getParameter(_param);
else if ("tel".equals(uri.getScheme()))
return ((TelURL) uri).getParameter(_param);
return null;
}
}