01: /*
02: * JBoss, Home of Professional Open Source
03: * Copyright 2005, JBoss Inc., and individual contributors as indicated
04: * by the @authors tag. See the copyright.txt in the distribution for a
05: * full listing of individual contributors.
06: *
07: * This is free software; you can redistribute it and/or modify it
08: * under the terms of the GNU Lesser General Public License as
09: * published by the Free Software Foundation; either version 2.1 of
10: * the License, or (at your option) any later version.
11: *
12: * This software is distributed in the hope that it will be useful,
13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15: * Lesser General Public License for more details.
16: *
17: * You should have received a copy of the GNU Lesser General Public
18: * License along with this software; if not, write to the Free
19: * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20: * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21: */
22: package org.jbpm.util;
23:
24: import java.io.ByteArrayOutputStream;
25: import java.io.IOException;
26: import java.io.InputStream;
27: import java.io.OutputStream;
28:
29: import org.jbpm.JbpmException;
30:
31: public abstract class IoUtil {
32:
33: public static final int BUFFERSIZE = 4096;
34:
35: public static byte[] readBytes(InputStream inputStream)
36: throws IOException {
37: byte[] bytes = null;
38: if (inputStream == null) {
39: throw new JbpmException("inputStream is null");
40: }
41: ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
42: transfer(inputStream, outputStream);
43: bytes = outputStream.toByteArray();
44: outputStream.close();
45: return bytes;
46: }
47:
48: public static int transfer(InputStream in, OutputStream out)
49: throws IOException {
50: int total = 0;
51: byte[] buffer = new byte[BUFFERSIZE];
52: int bytesRead = in.read(buffer);
53: while (bytesRead != -1) {
54: out.write(buffer, 0, bytesRead);
55: total += bytesRead;
56: bytesRead = in.read(buffer);
57: }
58: return total;
59: }
60: }
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