/*

 *   StarOffice News Server

 *   see AUTHORS for the list of contributors

 *

 *   This program is free software: you can redistribute it and/or modify

 *   it under the terms of the GNU General Public License as published by

 *   the Free Software Foundation, either version 3 of the License, or

 *   (at your option) any later version.

 *

 *   This program is distributed in the hope that it will be useful,

 *   but WITHOUT ANY WARRANTY; without even the implied warranty of

 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *   GNU General Public License for more details.

 *

 *   You should have received a copy of the GNU General Public License

 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

package com.so.news.io;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.URL;

import java.nio.charset.Charset;

/**

 * Provides method for loading of resources.

 * @author Christian Lins

 */

public class Resource

{

  /**

   * Loads a file as array of byte. As the file is completely loaded into

   * memory this method should only be used with small files.

   * @param file

   * @return

   */

  public static byte[] getBytes(File file)

  {

    try

    {

      FileInputStream in = new FileInputStream(file);

      byte[] buffer = new byte[(int)file.length()];

      in.read(buffer);

      return buffer;

    }

    catch(IOException ex)

    {

      System.err.println(ex.getLocalizedMessage());

      return null;

    }

  }

  /**

   * Loads a resource and returns it as URL reference.

   * The Resource's classloader is used to load the resource, not

   * the System's ClassLoader so it may be safe to use this method

   * in a sandboxed environment.

   * @return

   */

  public static URL getAsURL(String name)

  {

    return Resource.class.getClassLoader().getResource(name);

  }

  /**

   * Loads a resource and returns an InputStream to it.

   * @param name

   * @return

   */

  public static InputStream getAsStream(String name)

  {

    try

    {

      URL url = getAsURL(name);

      return url.openStream();

    }

    catch(IOException e)

    {

      e.printStackTrace();

      return null;

    }

  }

  /**

   * Loads a plain text resource.

   * @param withNewline If false all newlines are removed from the 

   * return String

   */

  public static String getAsString(String name, boolean withNewline)

  {

    try

    {

      BufferedReader in  = new BufferedReader(

          new InputStreamReader(getAsStream(name), Charset.forName("UTF-8")));

      StringBuffer   buf = new StringBuffer();

      for(;;)

      {

        String line = in.readLine();

        if(line == null)

          break;

        buf.append(line);

        if(withNewline)

          buf.append('\n');

      }

      return buf.toString();

    }

    catch(Exception e)

    {

      e.printStackTrace();

      return null;

    }

  }

}