org.jbpm.util.IoUtil Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of jbpm-jpdl Show documentation
The newest version!
/*
 * 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.
 */
package org.jbpm.util;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.AccessController;
import java.security.PrivilegedAction;

public class IoUtil {

  private static final int BUFFER_SIZE = 4096;

  public static final String lineSeparator = (String) AccessController.doPrivileged(
    new PrivilegedAction() {
      public Object run() {
        return System.getProperty("line.separator");
      }
    });

  // hide default constructor
  private IoUtil() {
  }

  public static byte[] readBytes(InputStream in) throws IOException {
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    transfer(in, out);
    return out.toByteArray();
  }

  public static int transfer(InputStream in, OutputStream out) throws IOException {
    int total = 0;
    byte[] buffer = new byte[BUFFER_SIZE];
    for (int bytesRead; (bytesRead = in.read(buffer)) != -1; total += bytesRead) {
      out.write(buffer, 0, bytesRead);
    }
    return total;
  }
}