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annotate src/main/java/nl/cwi/monetdb/util/Extract.java @ 102:08bc9009d190 embedded

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Merged with default
author Pedro Ferreira <pedro.ferreira@monetdbsolutions.com>
date Fri, 13 Jan 2017 18:16:30 +0100 (2017-01-13)
parents eeb71f7d36bf b9b35ca2eec2
children 89c285fc0a49
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1 /*
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2 * This Source Code Form is subject to the terms of the Mozilla Public
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
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5 *
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b9b35ca2eec2 Updated copyright year to 2017 in *.java files and MonetDriver.java.in and build.xml and version.sh
Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
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6 * Copyright 1997 - July 2008 CWI, August 2008 - 2017 MonetDB B.V.
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7 */
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8
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9 package nl.cwi.monetdb.util;
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11 import java.io.BufferedReader;
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12 import java.io.FileNotFoundException;
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13 import java.io.FileWriter;
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14 import java.io.IOException;
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15 import java.io.InputStream;
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16 import java.io.InputStreamReader;
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19 /**
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20 * This file contains a function to extract files from its including Jar package.
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21 *
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22 * @author Ying Zhang <Y.Zhang@cwi.nl>
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23 * @version 0.1
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24 */
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26 public class Extract {
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27 private static final int DEFAULT_BUFSIZE = 16386;
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29 /**
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30 * Extracts a file from the Jar package which includes this class to the given destination
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31 * @param fromFile The file to extract, including it absolute path inside its including Jar package.
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32 * @param toFile Destination for the extracted file
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33 * @throws FileNotFoundException If the file to extract can not be
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34 * found in its including Jar package.
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35 * @throws IOException If any error happens during creating/reading/writing files.
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36 */
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37 public static void extractFile(String fromFile, String toFile) throws FileNotFoundException, IOException {
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38 char[] cbuf = new char[DEFAULT_BUFSIZE];
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39 int ret;
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41 InputStream is = Extract.class.getResourceAsStream(fromFile);
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42
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43 if(is == null) {
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44 throw new FileNotFoundException("File " + fromFile + " does not exist in the JAR package.");
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45 }
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47 BufferedReader reader = new BufferedReader(new InputStreamReader(is));
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48 FileWriter writer = new FileWriter(toFile, false);
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49
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50 ret = reader.read(cbuf, 0, DEFAULT_BUFSIZE);
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51 while(ret > 0){
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52 writer.write(cbuf, 0, ret);
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53 ret = reader.read(cbuf, 0, DEFAULT_BUFSIZE);
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54 }
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55 reader.close();
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56 writer.close();
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57 }
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58 }