maint-5-2/tapestry-core/src/main/java/org/apache/tapestry5/internal/services/URLRewriterRequestFilter.java

// Copyright 2009, 2010 The Apache Software Foundation
//
// 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.apache.tapestry5.internal.services;

import java.io.IOException;

import org.apache.tapestry5.services.Request;
import org.apache.tapestry5.services.RequestFilter;
import org.apache.tapestry5.services.RequestHandler;
import org.apache.tapestry5.services.Response;
import org.apache.tapestry5.services.URLRewriter;

/**
 * <code>RequestFilter</code> that applies the URL rewriting rules to requests.
 * 
 * @see org.apache.tapestry5.services.RequestFilter
 */
public class URLRewriterRequestFilter implements RequestFilter
{

    final private URLRewriter urlRewriter;

    /**
     * Single constructor of this class.
     * @param urlRewriter um {@link URLRewriter}. It cannot be null.
     */
    public URLRewriterRequestFilter(URLRewriter urlRewriter)
    {
        assert urlRewriter != null;
        this.urlRewriter = urlRewriter;
    }

    public boolean service(Request request, Response response, RequestHandler handler)
            throws IOException
    {

        request = urlRewriter.processRequest(request);

        return handler.service(request, response);

    }

}