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org.apache.torque.engine.platform.PlatformFactory |
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1 | package org.apache.torque.engine.platform; |
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2 | ||
3 | /* |
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4 | * Copyright 2001-2005 The Apache Software Foundation. |
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5 | * |
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6 | * Licensed under the Apache License, Version 2.0 (the "License") |
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7 | * you may not use this file except in compliance with the License. |
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8 | * You may obtain a copy of the License at |
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9 | * |
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10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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11 | * |
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12 | * Unless required by applicable law or agreed to in writing, software |
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13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 | * See the License for the specific language governing permissions and |
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16 | * limitations under the License. |
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17 | */ |
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18 | ||
19 | import java.util.HashMap; |
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20 | ||
21 | import org.apache.commons.logging.Log; |
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22 | import org.apache.commons.logging.LogFactory; |
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23 | ||
24 | /** |
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25 | * Factory class responsible to create Platform objects that |
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26 | * define RDBMS platform specific behaviour. |
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27 | * |
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28 | * @author Thomas Mahler |
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29 | * @author <a href="mailto:mpoeschl@marmot.at">Martin Poeschl</a> |
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30 | * @version $Id: PlatformFactory.java 239626 2005-08-24 12:19:51Z henning $ |
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31 | */ |
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32 | 0 | public class PlatformFactory |
33 | { |
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34 | 10 | private static HashMap platforms = new HashMap(); |
35 | 20 | private static Log log = LogFactory.getLog(PlatformFactory.class); |
36 | ||
37 | /** |
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38 | * Returns the Platform for a platform name. |
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39 | * |
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40 | * @param dbms name of the platform |
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41 | */ |
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42 | public static Platform getPlatformFor(String dbms) |
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43 | { |
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44 | 3600 | Platform result = null; |
45 | 3600 | String platformName = null; |
46 | ||
47 | 3600 | result = (Platform) getPlatforms().get(dbms); |
48 | 3600 | if (result == null) |
49 | { |
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50 | try |
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51 | { |
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52 | 10 | platformName = getClassnameFor(dbms); |
53 | 10 | Class platformClass = Class.forName(platformName); |
54 | 10 | result = (Platform) platformClass.newInstance(); |
55 | ||
56 | } |
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57 | 0 | catch (Throwable t) |
58 | { |
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59 | 0 | log.warn("problems with platform " + platformName |
60 | + ": " + t.getMessage()); |
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61 | 0 | log.warn("Torque will use PlatformDefaultImpl instead"); |
62 | ||
63 | 0 | result = new PlatformDefaultImpl(); |
64 | 10 | } |
65 | 10 | getPlatforms().put(dbms, result); // cache the Platform |
66 | } |
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67 | 3600 | return result; |
68 | } |
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69 | ||
70 | /** |
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71 | * compute the name of the concrete Class representing the Platform |
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72 | * specified by <code>platform</code> |
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73 | * |
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74 | * @param platform the name of the platform as specified in the repository |
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75 | */ |
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76 | private static String getClassnameFor(String platform) |
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77 | { |
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78 | 10 | String pf = "Default"; |
79 | 10 | if (platform != null) |
80 | { |
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81 | 10 | pf = platform; |
82 | } |
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83 | 10 | return "org.apache.torque.engine.platform.Platform" + pf.substring(0, 1).toUpperCase() + pf.substring(1) + "Impl"; |
84 | } |
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85 | ||
86 | /** |
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87 | * Gets the platforms. |
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88 | * |
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89 | * @return Returns a HashMap |
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90 | */ |
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91 | private static HashMap getPlatforms() |
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92 | { |
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93 | 3610 | return platforms; |
94 | } |
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95 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |