Package org.apache.clerezza.web.fileserver

Source Code of org.apache.clerezza.web.fileserver.FileServer

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you 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.clerezza.web.fileserver;

import org.apache.clerezza.utils.osgi.BundlePathNode;
import java.io.File;
import java.net.URL;
import javax.ws.rs.Path;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.wymiwyg.commons.util.dirbrowser.FilePathNode;
import org.wymiwyg.commons.util.dirbrowser.PathNode;

/**
* A utility class providing a FileServer that can be configured in different
* ways. It provides an alternative to {@link AbstractFileServer} for jax-rs
* resources serviceng static files to override.
*
* @author reto
*/
@Path("/")
public class FileServer extends AbstractFileServer {
  private PathNode rootPathNode;

  /**
   * Construct a new instance that has to be configured using one of the
   * configure-methods.
   */
  public FileServer() {}

  /**
   * creates a new instance configured with specified pathnode as root
   *
   * @param pathNode the root of the PathNode hierarchy
   */
  public FileServer(PathNode pathNode) {
    this.rootPathNode = pathNode;
  }


  /**
   * configures the instance with the specified PathNode
   *
   * @param pathNode the root of the PathNode hierarchy
   */
  public void configure(PathNode pathNode) {
    this.rootPathNode = pathNode;
  }

  /**
   * Configures the instance to use the 'staticweb' folder next to (sub-)class
   * in the bundle associated to the specified context.
   *
   * @param context The scr component context of the bundle containing the
   *    'staticweb' directory where the subclass is located.
   */
  public void configure(BundleContext context) {
    configure(context, "staticweb");
  }

  /**
   * Sets up a path in a bundle or file system to be exposed over a
   * <code>org.apache.clerezza.web.fileserver.FileServer</code>. The path is
   * relative to the locationof the class.
   *
   * @param context The bundle context of the bundle containing the path.
   * @param path the path where the file are to be exposed
   */
  public void configure(BundleContext context, String path) {
    PathNode pathNode;
    Bundle bundle = context.getBundle();
    URL resourceDir = getClass().getResource(path);
    pathNode = new BundlePathNode(bundle, resourceDir.getPath());
    configure(pathNode);
  }
  /**
   * configures the instance to use the specified directory as root
   *
   * @param rootDir the root of the serverd hierarchy
   */
  public void configure(File rootDir) {
    configure(new FilePathNode(rootDir));
  }

  /**
   * resets the configuration
   */
  public void reset() {
    rootPathNode = null;
  }

  @Override
  protected PathNode getRootNode() {
    return rootPathNode;
  }

}
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