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annotate flys-aft/src/main/java/de/intevation/db/Statements.java @ 4068:21e49e0a2307

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Add infrastructure to load SQL statements for databases. flys-aft/trunk@3389 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 12 Dec 2011 16:57:58 +0000
parents
children a4e79e8e0aa0
rev   line source
4068
21e49e0a2307 Add infrastructure to load SQL statements for databases.
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1 package de.intevation.db;
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2
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3 import java.util.Properties;
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4
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5 import java.io.IOException;
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6 import java.io.InputStream;
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7
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8 import org.apache.log4j.Logger;
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9
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10 public class Statements
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11 {
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12 private static Logger log = Logger.getLogger(Statements.class);
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13
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14 public static final String RESOURCE_PATH = "/sql/";
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15 public static final String COMMON_PROPERTIES = "-common.properties";
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16
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17 protected String type;
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18 protected String driver;
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19
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20 protected Properties properties;
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21
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22 public Statements(String type, String driver) {
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23 this.type = type;
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24 this.driver = driver;
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25 }
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26
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27 protected String driverToProperties() {
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28 return
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29 type + "-" +
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30 driver.replace('.', '-').toLowerCase() + ".properties";
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31 }
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32
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33 protected Properties loadCommon() {
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34 Properties common = new Properties();
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35
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36 String path = RESOURCE_PATH + type + COMMON_PROPERTIES;
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37
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38 InputStream in = Statements.class.getResourceAsStream(path);
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39
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40 if (in != null) {
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41 try {
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42 common.load(in);
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43 }
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44 catch (IOException ioe) {
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45 log.error("cannot load defaults: " + path, ioe);
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46 }
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47 finally {
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48 try {
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49 in.close();
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50 }
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51 catch (IOException ioe) {
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52 }
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53 }
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54 }
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55 else {
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56 log.warn("cannot find: " + path);
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57 }
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58
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59 return common;
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60 }
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61
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62 protected Properties getProperties() {
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63
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64 if (properties != null) {
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65 return properties;
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66 }
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67
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68 Properties common = loadCommon();
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69
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70 properties = new Properties(common);
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71
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72 String path = RESOURCE_PATH + driverToProperties();
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73
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74 InputStream in = Statements.class.getResourceAsStream(path);
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75
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76 if (in != null) {
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77 try {
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78 properties.load(in);
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79 }
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80 catch (IOException ioe) {
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81 log.error("cannot load statements: " + path, ioe);
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82 }
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83 finally {
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84 try {
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85 in.close();
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86 }
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87 catch (IOException ioe) {
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88 }
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89 }
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90 }
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91 else {
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92 log.warn("cannot find: " + path);
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93 }
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94
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95 return properties;
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96 }
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97 }
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98 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org