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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 * 
 * Modified by Matthieu Chaffotte - BonitaSoft S.A.
 */
package org.ow2.bonita.util;

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

public abstract class IoUtil {

  public static final int BUFFERSIZE = 4096;

  public static byte[] readBytes(InputStream inputStream) {
    byte[] bytes = null;
    if (inputStream == null) {
    	String message = ExceptionManager.getInstance().getFullMessage("bp_IU_1");
      throw new BonitaRuntimeException(message);
    }
    ByteArrayOutputStream outputStream = null;
    try {
      outputStream = new ByteArrayOutputStream();
      transfer(inputStream, outputStream);
      bytes = outputStream.toByteArray();
      return bytes;
    } finally {
      try {
        if (outputStream != null) {
          outputStream.close();
        }
      } catch (IOException e) {
        String message = ExceptionManager.getInstance().getFullMessage("bp_IU_2");
        throw new BonitaRuntimeException(message, e);
      }
    }
  }

  public static int transfer(InputStream in, OutputStream out) {
    int total = 0;
    byte[] buffer = new byte[BUFFERSIZE];
    try {
      int bytesRead = in.read(buffer);
      while (bytesRead != -1) {
        out.write(buffer, 0, bytesRead);
        total += bytesRead;
        bytesRead = in.read(buffer);
      }
      return total;
    } catch (IOException e) {
    	String message = ExceptionManager.getInstance().getFullMessage("bp_IU_3");
      throw new BonitaRuntimeException(message, e);
    }
  }
}