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annotate src/main/java/nl/cwi/monetdb/util/Exporter.java @ 0:a5a898f6886c

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Copy of MonetDB java directory changeset e6e32756ad31.
author Sjoerd Mullender <sjoerd@acm.org>
date Wed, 21 Sep 2016 09:34:48 +0200 (2016-09-21)
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children 57978db4ee57 17fbaf2635bb
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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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6 * Copyright 1997 - July 2008 CWI, August 2008 - 2016 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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10
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11 import java.io.*;
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12 import java.sql.*;
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13 import java.util.Arrays;
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14
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15
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16 public abstract class Exporter {
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17 protected PrintWriter out;
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18 protected boolean useSchema;
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19
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20 protected Exporter(PrintWriter out) {
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21 this.out = out;
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22 }
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23
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24 public abstract void dumpSchema(
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25 DatabaseMetaData dbmd,
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26 String type,
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27 String catalog,
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28 String schema,
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29 String name) throws SQLException;
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30
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31 public abstract void dumpResultSet(ResultSet rs) throws SQLException;
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32
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33 public abstract void setProperty(int type, int value) throws Exception;
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34 public abstract int getProperty(int type) throws Exception;
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35
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36 //=== shared utilities
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37
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38 public void useSchemas(boolean use) {
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39 useSchema = use;
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40 }
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41
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42 /**
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43 * returns the given string between two double quotes for usage as
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44 * identifier such as column or table name in SQL queries.
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45 *
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46 * @param in the string to quote
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47 * @return the quoted string
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48 */
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49 protected static String dq(String in) {
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50 return "\"" + in.replaceAll("\\\\", "\\\\\\\\").replaceAll("\"", "\\\\\"") + "\"";
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51 }
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52
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53 /**
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54 * returns the given string between two single quotes for usage as
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55 * string literal in SQL queries.
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56 *
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57 * @param in the string to quote
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58 * @return the quoted string
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59 */
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60 protected static String q(String in) {
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61 return "'" + in.replaceAll("\\\\", "\\\\\\\\").replaceAll("'", "\\\\'") + "'";
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62 }
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63
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64 /**
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65 * Simple helper function to repeat a given character a number of
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66 * times.
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67 *
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68 * @param chr the character to repeat
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69 * @param cnt the number of times to repeat chr
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70 * @return a String holding cnt times chr
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71 */
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72 protected static String repeat(char chr, int cnt) {
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73 char[] buf = new char[cnt];
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74 Arrays.fill(buf, chr);
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75 return new String(buf);
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76 }
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77 }