ResourceAccessor.java

/*
 *
 * Copyright (c) void.fm
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this list
 * of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice, this
 * list of conditions and the following disclaimer in the documentation and/or
 * other materials provided with the distribution.
 *
 * Neither the name void.fm nor the names of its contributors may be
 * used to endorse or promote products derived from this software without specific
 * prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

package etm.contrib.console.util;

import etm.contrib.console.ConsoleException;
import etm.core.monitor.EtmMonitor;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * In memory "cache" for drop-in html console resources.
 *
 * @author void.fm
 * @version $Revision$
 */
public class ResourceAccessor {
  private byte[] favicon;
  private byte[] downarrow;
  private byte[] css;
  private byte[] robots;
  private byte[] uparrow;

  public ResourceAccessor() {
    favicon = loadResource("etm/contrib/console/resources/favicon.ico");
    downarrow = loadResource("etm/contrib/console/resources/down-arrow.png");
    uparrow = loadResource("etm/contrib/console/resources/up-arrow.png");
    css = loadResource("etm/contrib/console/resources/style.css");
    robots = loadResource("etm/contrib/console/resources/robots.txt");
  }

  private byte[] loadResource(String resourcePath) {
    InputStream in = EtmMonitor.class.getClassLoader().getResourceAsStream(resourcePath);
    ByteArrayOutputStream output = new ByteArrayOutputStream();

    if (in != null) {
      try {
        byte[] buffer = new byte[8192];
        int n;
        while (-1 != (n = in.read(buffer))) {
          output.write(buffer, 0, n);
        }
      } catch (Exception e) {
        throw new ConsoleException(e);
      } finally {
        try {
          in.close();
        } catch (IOException e) {
          // ignored
        }
      }
    }
    return output.toByteArray();
  }

  public byte[] getFavicon() {
    return favicon;
  }

  public byte[] getStyleSheet() {
    return css;
  }

  public byte[] getRobotsTxt() {
    return robots;
  }

  public byte[] getDownarrow() {
    return downarrow;
  }

  public byte[] getUparrow() {
    return uparrow;
  }
}