net.hillsdon.reviki.web.dispatching.impl.ResourceHandlerImpl.java Source code

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Here is the source code for net.hillsdon.reviki.web.dispatching.impl.ResourceHandlerImpl.java

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/**
 * Copyright 2008 Matthew Hillsdon
 *
 * 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.hillsdon.reviki.web.dispatching.impl;

import javax.servlet.RequestDispatcher;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.httpclient.util.URIUtil;

import net.hillsdon.reviki.vc.NotFoundException;
import net.hillsdon.reviki.web.common.ConsumedPath;
import net.hillsdon.reviki.web.common.View;
import net.hillsdon.reviki.web.dispatching.ResourceHandler;

public class ResourceHandlerImpl implements ResourceHandler {

    public View handle(final ConsumedPath path, final HttpServletRequest request,
            final HttpServletResponse response) throws Exception {
        if (!path.hasNext()) {
            throw new NotFoundException();
        }

        StringBuilder sb = new StringBuilder("/resources");

        while (path.hasNext()) {
            sb.append("/");
            sb.append(URIUtil.encodeWithinPath(path.next()));
        }

        final String resource = sb.toString();

        return new View() {
            public void render(final HttpServletRequest request, final HttpServletResponse response)
                    throws Exception {
                RequestDispatcher requestDispatcher = request.getRequestDispatcher(resource);
                requestDispatcher.forward(request, response);
            }
        };
    }

}