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comparison artifact-database/src/main/java/de/intevation/artifactdatabase/FactoryBootstrap.java @ 5:8f2de197bce2

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Added config to artifact database and modelled bootstap of artifact factories on top of this. artifacts/trunk@15 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Fri, 04 Sep 2009 12:04:12 +0000
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children f95d9a449215
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4:13a12b607baf 5:8f2de197bce2
1 package de.intevation.artifactdatabase;
2
3 import org.w3c.dom.Document;
4 import org.w3c.dom.NodeList;
5
6 import java.util.ArrayList;
7
8 import de.intevation.artifacts.ArtifactFactory;
9 import de.intevation.artifacts.ArtifactContextFactory;
10
11 /**
12 * Bootstrap facility for the global context and the artifact factories.
13 *
14 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de)
15 */
16 public class FactoryBootstrap
17 {
18 public static final String CONTEXT_FACTORY =
19 "/artifact-database/factories/context-factory/text()";
20
21 public static final String DEFAULT_CONTEXT_FACTORY =
22 "de.intevation.artifactdatabase.DefaultArtifactContextFactory";
23
24 public static final String ARTIFACT_FACTORIES =
25 "/artifact-database/factories/artifact-factories/artifact-factory/text()";
26
27 protected Object context;
28
29 protected ArtifactFactory [] artifactFactories;
30
31 public FactoryBootstrap() {
32 }
33
34 void buildContext() {
35 String className = Config.getStringXPath(
36 CONTEXT_FACTORY, DEFAULT_CONTEXT_FACTORY);
37
38 ArtifactContextFactory factory = null;
39
40 try {
41 Class clazz = Class.forName(className);
42 factory = (ArtifactContextFactory)clazz.newInstance();
43 }
44 catch (ClassNotFoundException cnfe) {
45 cnfe.printStackTrace(System.err);
46 }
47 catch (InstantiationException ie) {
48 ie.printStackTrace(System.err);
49 }
50 catch (ClassCastException cce) {
51 cce.printStackTrace(System.err);
52 }
53 catch (IllegalAccessException iae) {
54 iae.printStackTrace(System.err);
55 }
56
57 if (factory == null) {
58 factory = new DefaultArtifactContextFactory();
59 }
60
61 context = factory.createArtifactContext(Config.getConfig());
62 }
63
64 protected void loadArtifactFactories() {
65 ArrayList loadedFactories = new ArrayList();
66
67 NodeList nodes = Config.getNodeSetXPath(ARTIFACT_FACTORIES);
68
69 Document config = Config.getConfig();
70
71 for (int i = 0, N = nodes.getLength(); i < N; ++i) {
72 String className = nodes.item(i).getTextContent();
73
74 ArtifactFactory factory = null;
75
76 try {
77 Class clazz = Class.forName(className);
78 factory = (ArtifactFactory)clazz.newInstance();
79 }
80 catch (ClassNotFoundException cnfe) {
81 cnfe.printStackTrace(System.err);
82 }
83 catch (InstantiationException ie) {
84 ie.printStackTrace(System.err);
85 }
86 catch (ClassCastException cce) {
87 cce.printStackTrace(System.err);
88 }
89 catch (IllegalAccessException iae) {
90 iae.printStackTrace(System.err);
91 }
92
93 if (factory != null) {
94 factory.setup(config);
95 loadedFactories.add(factory);
96 }
97 }
98
99 artifactFactories = (ArtifactFactory [])loadedFactories.toArray(
100 new ArtifactFactory[loadedFactories.size()]);
101 }
102
103 public void boot() {
104 buildContext();
105 loadArtifactFactories();
106 }
107
108 public ArtifactFactory [] getArtifactFactories() {
109 return artifactFactories;
110 }
111
112 public Object getContext() {
113 return context;
114 }
115 }
116 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
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