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// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The SFC 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.openqa.selenium.server;

import org.openqa.jetty.util.IO;
import org.openqa.jetty.util.Resource;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URL;

/**
 * Represents resource file off of the classpath.
 *
 * @author Patrick Lightbody (plightbo at gmail dot com)
 */
public class ClassPathResource extends Resource {
  String path;

  ByteArrayOutputStream os;

  /**
   * Specifies the classpath path containing the resource
   */
  public ClassPathResource(String path) {
    this.path = path;
    InputStream is = getSeleniumResourceAsStream(path);
    if (is != null) {
      os = new ByteArrayOutputStream();
      try {
        IO.copy(is, os);
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
  }

  public static InputStream getSeleniumResourceAsStream(String resourceFile) {
    return ClassPathResource.class.getResourceAsStream(resourceFile);
  }

  /* ------------------------------------------------------------ */
  @Override
  public Object getAssociate() {
    return super.getAssociate();
  }

  @Override
  public void release() {
  }

  @Override
  public boolean exists() {
    return os != null;
  }

  @Override
  public boolean isDirectory() {
    return false;
  }

  /**
   * Returns the lastModified time, which is always in the distant future to prevent caching.
   */
  @Override
  public long lastModified() {
    return System.currentTimeMillis() + 1000L * 3600L * 24L * 365L;
  }

  @Override
  public long length() {
    if (os != null) {
      return os.size();
    }

    return 0;
  }

  @Override
  public URL getURL() {
    return null;
  }

  @Override
  public File getFile() throws IOException {
    return null;
  }

  @Override
  public String getName() {
    return path;
  }

  @Override
  public InputStream getInputStream() throws IOException {
    if (os != null) {
      return new ByteArrayInputStream(os.toByteArray());
    }
    return null;
  }

  @Override
  public OutputStream getOutputStream() throws IOException, SecurityException {
    return null;
  }

  @Override
  public boolean delete() throws SecurityException {
    return false;
  }

  @Override
  public boolean renameTo(Resource dest) throws SecurityException {
    return false;
  }

  @Override
  public String[] list() {
    return new String[0];
  }

  @Override
  public Resource addPath(String pathParm) throws IOException,
      MalformedURLException {
    return new ClassPathResource(this.path + "/" + pathParm);
  }

  @Override
  public String toString() {
    return getName();
  }
}