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1 /*
2  * $Id: IOUtil.java,v 1.1.2.2 2003/02/25 15:19:57 jeremias Exp $
3  * ============================================================================
4  * The Apache Software License, Version 1.1
5  * ============================================================================
6  *
7  * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without modifica-
10  * tion, are permitted provided that the following conditions are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright notice,
13  * this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright notice,
16  * this list of conditions and the following disclaimer in the documentation
17  * and/or other materials provided with the distribution.
18  *
19  * 3. The end-user documentation included with the redistribution, if any, must
20  * include the following acknowledgment: "This product includes software
21  * developed by the Apache Software Foundation (http://www.apache.org/)."
22  * Alternately, this acknowledgment may appear in the software itself, if
23  * and wherever such third-party acknowledgments normally appear.
24  *
25  * 4. The names "FOP" and "Apache Software Foundation" must not be used to
26  * endorse or promote products derived from this software without prior
27  * written permission. For written permission, please contact
28  * apache@apache.org.
29  *
30  * 5. Products derived from this software may not be called "Apache", nor may
31  * "Apache" appear in their name, without prior written permission of the
32  * Apache Software Foundation.
33  *
34  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
35  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
36  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
37  * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
38  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
39  * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
40  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
41  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
42  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
43  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44  * ============================================================================
45  *
46  * This software consists of voluntary contributions made by many individuals
47  * on behalf of the Apache Software Foundation and was originally created by
48  * James Tauber <jtauber@jtauber.com>. For more information on the Apache
49  * Software Foundation, please see <http://www.apache.org/>.
50  */

51 package org.apache.fop.tools;
52
53 import java.io.InputStream JavaDoc;
54 import java.io.OutputStream JavaDoc;
55 import java.io.ByteArrayOutputStream JavaDoc;
56 import java.io.IOException JavaDoc;
57
58 /**
59  * I/O utilities. This class should be replaced as soon as Jakarta Commons IO
60  * announces its first release.
61  * @todo Replace with Jakarta Commons I/O
62  */

63 public class IOUtil {
64
65     /**
66      * Copies the contents of the InputStream over to the OutputStream. This
67      * method doesn't close the streams.
68      * @param in InputStream to read from
69      * @param out OutputStream to write to
70      * @throws IOException In case of an I/O problem
71      */

72     public static void copyStream(InputStream JavaDoc in, OutputStream JavaDoc out) throws IOException JavaDoc {
73         final int bufferSize = 2048;
74         final byte[] buf = new byte[bufferSize];
75         int bytesRead;
76         while ((bytesRead = in.read(buf)) != -1) {
77             out.write(buf, 0, bytesRead);
78         }
79     }
80
81
82     /**
83      * Loads the contents of the InputStream to a byte array. The InputStream
84      * isn't closed.
85      * @param in InputStream to read from
86      * @param initialTargetBufferSize initial number of bytes to allocate
87      * (expected size to avoid a lot of reallocations)
88      * @return byte[] the array of bytes requested
89      * @throws IOException In case of an I/O problem
90      */

91     public static byte[] toByteArray(InputStream JavaDoc in, int initialTargetBufferSize)
92                 throws IOException JavaDoc {
93         ByteArrayOutputStream JavaDoc baout = new ByteArrayOutputStream JavaDoc(initialTargetBufferSize);
94         try {
95             copyStream(in, baout);
96         } finally {
97             baout.close();
98         }
99         return baout.toByteArray();
100     }
101
102 }
103
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