Mercurial > hg > monetdb-java

comparison src/main/java/org/monetdb/util/Extract.java @ 391:f523727db392

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Moved Java classes from packages starting with nl.cwi.monetdb.* to package org.monetdb.* This naming complies to the Java Package Naming convention as MonetDB's main website is www.monetdb.org.
author Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
date Thu, 12 Nov 2020 22:02:01 +0100 (2020-11-12)
parents src/main/java/nl/cwi/monetdb/util/Extract.java@54137aeb1f92
children bf9f6b6ecf40
comparison
equal deleted inserted replaced
390:6199e0be3c6e 391:f523727db392
1 /*
2 * This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
5 *
6 * Copyright 1997 - July 2008 CWI, August 2008 - 2020 MonetDB B.V.
7 */
8
9 package org.monetdb.util;
10
11 import java.io.BufferedReader;
12 import java.io.FileNotFoundException;
13 import java.io.FileWriter;
14 import java.io.IOException;
15
16 /**
17 * This file contains a function to extract files from its including Jar
18 * package.
19 *
20 * @author Ying Zhang "Y.Zhang@cwi.nl"
21 * @version 0.1
22 */
23 public class Extract {
24 private static final int DEFAULT_BUFSIZE = 16386;
25
26 public Extract() {}
27
28 /**
29 * Extracts a file from the Jar package which includes this class to
30 * the given destination
31 * @param fromFile The file to extract, including it absolute path
32 * inside its including Jar package.
33 * @param toFile Destination for the extracted file
34 * @throws FileNotFoundException If the file to extract can not be
35 * found in its including Jar package.
36 * @throws IOException If any error happens during
37 * creating/reading/writing files.
38 */
39 public static void extractFile(final String fromFile, final String toFile)
40 throws FileNotFoundException, IOException
41 {
42 final java.io.InputStream is = new Extract().getClass().getResourceAsStream(fromFile);
43 if (is == null) {
44 throw new FileNotFoundException("File " + fromFile +
45 " does not exist in the JAR package.");
46 }
47
48 final BufferedReader reader = new BufferedReader(new java.io.InputStreamReader(is));
49 final FileWriter writer = new FileWriter(toFile, false);
50 final char[] cbuf = new char[DEFAULT_BUFSIZE];
51 int ret = reader.read(cbuf, 0, DEFAULT_BUFSIZE);
52 while (ret > 0) {
53 writer.write(cbuf, 0, ret);
54 ret = reader.read(cbuf, 0, DEFAULT_BUFSIZE);
55 }
56 reader.close();
57 writer.close();
58 }
59 }