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1
11 package org.eclipse.pde.internal.core;
12
13 import java.io.IOException  ;
14 import java.net.URL ;
15 import java.util.Arrays ;
16 import java.util.Comparator ;
17 import java.util.HashMap ;
18 import java.util.Map ;
19
20 import org.eclipse.core.runtime.FileLocator;
21 import org.eclipse.core.runtime.IConfigurationElement;
22 import org.eclipse.core.runtime.IExtension;
23 import org.eclipse.core.runtime.IExtensionDelta;
24 import org.eclipse.core.runtime.IExtensionRegistry;
25 import org.eclipse.core.runtime.IRegistryChangeEvent;
26 import org.eclipse.core.runtime.IRegistryChangeListener;
27 import org.eclipse.core.runtime.Platform;
28 import org.osgi.framework.Bundle;
29
30 public class TargetDefinitionManager implements IRegistryChangeListener{
31
32 Map fTargets;
33 private static String [] attributes;
34 {
35 attributes = new String [] {"id", "name" }; }
37
38 public void registryChanged(IRegistryChangeEvent event) {
39 IExtensionDelta[] deltas = event.getExtensionDeltas();
40 for (int i = 0; i < deltas.length; i++) {
41 IExtension extension = deltas[i].getExtension();
42 String extensionId = extension.getExtensionPointUniqueIdentifier();
43 if (extensionId.equals("org.eclipse.pde.core.targets")) { IConfigurationElement[] elems = extension.getConfigurationElements();
45 if (deltas[i].getKind() == IExtensionDelta.ADDED)
46 add(elems);
47 else
48 remove(elems);
49 }
50 }
51 }
52
53 public IConfigurationElement[] getTargets() {
54 if (fTargets == null)
55 loadElements();
56 return (IConfigurationElement[])fTargets.values().toArray(new IConfigurationElement[fTargets.size()]);
57 }
58
59 public IConfigurationElement[] getSortedTargets() {
60 if (fTargets == null)
61 loadElements();
62 IConfigurationElement[] result = (IConfigurationElement[])fTargets.values().toArray(new IConfigurationElement[fTargets.size()]);
63 Arrays.sort(result, new Comparator () {
64
65 public int compare(Object o1, Object o2) {
66 String value1 = getString((IConfigurationElement)o1);
67 String value2 = getString((IConfigurationElement)o2);
68 return value1.compareTo(value2);
69 }
70
71 private String getString(IConfigurationElement elem){
72 String name = elem.getAttribute("name"); String id = elem.getAttribute("id"); name = name + " [" + id + "]"; return name;
76 }
77
78 });
79 return result;
80 }
81
82 public IConfigurationElement getTarget(String id) {
83 if (fTargets == null)
84 loadElements();
85 return (IConfigurationElement)fTargets.get(id);
86 }
87
88 private void loadElements() {
89 fTargets = new HashMap ();
90 IExtensionRegistry registry = Platform.getExtensionRegistry();
91 registry.addRegistryChangeListener(this);
92 IConfigurationElement[] elements = registry.getConfigurationElementsFor("org.eclipse.pde.core.targets"); add(elements);
94 }
95
96 private boolean isValid (IConfigurationElement elem) {
97 String value;
98 for (int i = 0; i < attributes.length; i++) {
99 value = elem.getAttribute(attributes[i]);
100 if (value == null || value.equals("")) return false;
102 }
103 value = elem.getAttribute("definition"); String symbolicName = elem.getDeclaringExtension().getNamespaceIdentifier();
105 URL url = getResourceURL(symbolicName, value);
106 try {
107 if (url != null && url.openStream().available() > 0)
108 return true;
109 } catch (IOException e) {
110 }
112 return false;
113 }
114
115 public static URL getResourceURL(String bundleID, String resourcePath) {
116 try {
117 Bundle bundle = Platform.getBundle(bundleID);
118 if (bundle != null && resourcePath != null) {
119 URL entry = bundle.getEntry(resourcePath);
120 if (entry != null)
121 return FileLocator.toFileURL(entry);
122 }
123 } catch (IOException e) {
124 }
125 return null;
126 }
127
128 private void add(IConfigurationElement[] elems) {
129 for (int i = 0; i < elems.length; i++) {
130 IConfigurationElement elem = elems[i];
131 if (isValid(elem)) {
132 String id = elem.getAttribute("id"); fTargets.put(id, elem);
134 }
135 }
136 }
137
138 private void remove(IConfigurationElement[] elems) {
139 for (int i = 0 ; i < elems.length; i++) {
140 fTargets.remove(elems[i].getAttribute("id")); }
142 }
143
144 public void shutdown() {
145 IExtensionRegistry registry = Platform.getExtensionRegistry();
146 registry.removeRegistryChangeListener(this);
147 }
148
149 }
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