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annotate src/main/java/org/monetdb/util/Extract.java @ 973:32f246853ec4 default tip

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Optimisation, call connection.mapClobAsVarChar() and connection.mapBlobAsVarBinary() outside the for-loop, as it does not change.
author Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
date Thu, 10 Apr 2025 19:26:59 +0200 (2 weeks ago)
parents d416e9b6b3d0
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * SPDX-License-Identifier: MPL-2.0
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3 *
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4 * This Source Code Form is subject to the terms of the Mozilla Public
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5 * License, v. 2.0. If a copy of the MPL was not distributed with this
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6 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
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7 *
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8 * Copyright 2024, 2025 MonetDB Foundation;
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9 * Copyright August 2008 - 2023 MonetDB B.V.;
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10 * Copyright 1997 - July 2008 CWI.
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11 */
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12
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f523727db392 Moved Java classes from packages starting with nl.cwi.monetdb.* to package org.monetdb.*
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13 package org.monetdb.util;
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15 import java.io.BufferedReader;
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16 import java.io.FileNotFoundException;
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17 import java.io.FileWriter;
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18 import java.io.IOException;
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19
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20 /**
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21 * This file contains a function to extract files from its including Jar
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22 * package.
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23 *
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24 * @author Ying Zhang "Y.Zhang@cwi.nl"
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25 * @version 0.1
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26 */
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27 public class Extract {
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28 private static final int DEFAULT_BUFSIZE = 16386;
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29
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30 public Extract() {}
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31
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32 /**
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33 * Extracts a file from the Jar package which includes this class to
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34 * the given destination
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35 * @param fromFile The file to extract, including it absolute path
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36 * inside its including Jar package.
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37 * @param toFile Destination for the extracted file
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38 * @throws FileNotFoundException If the file to extract can not be
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39 * found in its including Jar package.
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40 * @throws IOException If any error happens during
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41 * creating/reading/writing files.
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42 */
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43 public static void extractFile(final String fromFile, final String toFile)
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44 throws FileNotFoundException, IOException
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45 {
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46 final java.io.InputStream is = new Extract().getClass().getResourceAsStream(fromFile);
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47 if (is == null) {
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48 throw new FileNotFoundException("File " + fromFile +
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49 " does not exist in the JAR package.");
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50 }
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51
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52 final BufferedReader reader = new BufferedReader(new java.io.InputStreamReader(is));
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53 final FileWriter writer = new FileWriter(toFile, false);
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54 final char[] cbuf = new char[DEFAULT_BUFSIZE];
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55 int ret = reader.read(cbuf, 0, DEFAULT_BUFSIZE);
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56 while (ret > 0) {
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57 writer.write(cbuf, 0, ret);
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58 ret = reader.read(cbuf, 0, DEFAULT_BUFSIZE);
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59 }
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60 reader.close();
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61 writer.close();
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62 }
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63 }