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Package: ExtensionParser$ExtensionDescriptor
ExtensionParser$ExtensionDescriptor
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| ExtensionParser.ExtensionDescriptor(ElementRegistry, String, String, IConfigurationElement) |
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| getConfigurationElement() |
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| resolve() |
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Coverage
1: /********************************************************************************
2: * Copyright (c) 2011 Eike Stepper (Berlin, Germany) and others.
3: *
4: * All rights reserved. This program and the accompanying materials
5: * are made available under the terms of the Eclipse Public License 2.0
6: * which accompanies this distribution, and is available at
7: * https://www.eclipse.org/legal/epl-2.0/
8: *
9: * SPDX-License-Identifier: EPL-2.0
10: *
11: * Contributors:
12: * Eike Stepper - initial API and implementation
13: ********************************************************************************/
14: package org.eclipse.emf.ecp.internal.core.util;
15:
16: import java.io.File;
17: import java.util.HashSet;
18: import java.util.Set;
19:
20: import org.eclipse.core.runtime.IConfigurationElement;
21: import org.eclipse.core.runtime.IExtension;
22: import org.eclipse.core.runtime.IExtensionDelta;
23: import org.eclipse.core.runtime.IExtensionPoint;
24: import org.eclipse.core.runtime.IRegistryChangeEvent;
25: import org.eclipse.core.runtime.IRegistryChangeListener;
26: import org.eclipse.core.runtime.Platform;
27: import org.eclipse.emf.ecp.spi.core.util.ECPDisposable;
28: import org.eclipse.emf.ecp.spi.core.util.InternalRegistryElement;
29: import org.eclipse.net4j.util.lifecycle.Lifecycle;
30: import org.osgi.framework.Bundle;
31:
32: /**
33: * @author Eike Stepper
34: * @param <ELEMENT>
35: */
36: public abstract class ExtensionParser<ELEMENT extends InternalRegistryElement> extends Lifecycle implements
37: IRegistryChangeListener {
38: private final ElementRegistry<ELEMENT, ?> elementRegistry;
39:
40: private final String namespace;
41:
42: private final String name;
43:
44: public ExtensionParser(ElementRegistry<ELEMENT, ?> elementRegistry, String namespace, String name) {
45: this.elementRegistry = elementRegistry;
46: this.namespace = namespace;
47: this.name = name;
48: }
49:
50: public final ElementRegistry<ELEMENT, ?> getElementRegistry() {
51: return elementRegistry;
52: }
53:
54: public final String getNamespace() {
55: return namespace;
56: }
57:
58: public final String getName() {
59: return name;
60: }
61:
62: /** {@inheritDoc} */
63: @Override
64: public void registryChanged(IRegistryChangeEvent event) {
65: final Set<String> remove = new HashSet<String>();
66: final Set<ELEMENT> add = new HashSet<ELEMENT>();
67: for (final IExtensionDelta delta : event.getExtensionDeltas(namespace, name)) {
68: final IExtension extension = delta.getExtension();
69: final int kind = delta.getKind();
70: switch (kind) {
71: case IExtensionDelta.ADDED:
72: addExtension(extension, add);
73: break;
74:
75: case IExtensionDelta.REMOVED:
76: removeExtension(extension, remove);
77: break;
78: default:
79: break;
80: }
81: }
82:
83: final Set<ELEMENT> removedElements = elementRegistry.doChangeElements(remove, add);
84: if (removedElements != null) {
85: for (final ELEMENT removedElement : removedElements) {
86: if (removedElement instanceof ECPDisposable) {
87: final ECPDisposable disposable = removedElement;
88: disposable.dispose();
89: }
90: }
91: }
92: }
93:
94: @Override
95: protected void doActivate() throws Exception {
96: super.doActivate();
97:
98: final String extensionPointID = namespace + "." + name; //$NON-NLS-1$
99: final Set<ELEMENT> add = new HashSet<ELEMENT>();
100:
101: final IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(extensionPointID);
102: for (final IExtension extension : extensionPoint.getExtensions()) {
103: addExtension(extension, add);
104: }
105:
106: elementRegistry.doChangeElements(null, add);
107: Platform.getExtensionRegistry().addRegistryChangeListener(this, namespace);
108: }
109:
110: @Override
111: protected void doDeactivate() throws Exception {
112: Platform.getExtensionRegistry().removeRegistryChangeListener(this);
113: super.doDeactivate();
114: }
115:
116: protected void addExtension(IExtension extension, Set<ELEMENT> result) {
117: final String name = extension.getUniqueIdentifier();
118: final IConfigurationElement configurationElement = extension.getConfigurationElements()[0];
119:
120: final ELEMENT element = createElement(name, configurationElement);
121: element.setLabel(extension.getLabel());
122: element.setDescription(configurationElement.getAttribute("description")); //$NON-NLS-1$
123: result.add(element);
124: }
125:
126: protected void removeExtension(IExtension extension, Set<String> result) {
127: final String name = extension.getUniqueIdentifier();
128: result.add(name);
129: }
130:
131: protected abstract ELEMENT createElement(String name, IConfigurationElement configurationElement);
132:
133: /**
134: * @author Eike Stepper
135: * @param <ELEMENT> The type of this descriptor which must extend {@link InternalRegistryElement}
136: */
137: public static class ExtensionDescriptor<ELEMENT extends InternalRegistryElement>
138: extends ElementDescriptor<ELEMENT> {
139: private final String type;
140:
141: private final IConfigurationElement configurationElement;
142:
143: public ExtensionDescriptor(ElementRegistry<ELEMENT, ?> registry, String name, String type,
144: IConfigurationElement configurationElement) {
145: super(registry, name);
146: this.type = type;
147: this.configurationElement = configurationElement;
148:
149: try {
150: final String bundleName = configurationElement.getContributor().getName();
151: final Bundle bundle = Platform.getBundle(bundleName);
152: String location = bundle.getLocation();
153:
154:• if (location.startsWith("initial@")) { //$NON-NLS-1$
155: location = location.substring("initial@".length()); //$NON-NLS-1$
156: }
157:
158: final String prefix = "reference:file:"; //$NON-NLS-1$
159:• if (location.startsWith(prefix)) {
160: location = location.substring(prefix.length());
161:
162: // TODO Trace properly
163: System.out.println(getClass().getSimpleName() + ": " + bundleName + " [" + bundle.getBundleId() //$NON-NLS-1$ //$NON-NLS-2$
164: + "] --> file:" + new File(location).getCanonicalPath()); //$NON-NLS-1$
165: }
166: } catch (final Exception ex) {
167: ex.printStackTrace();
168: }
169: }
170:
171: /** {@inheritDoc} */
172: @Override
173: public String getType() {
174: return type;
175: }
176:
177: public final IConfigurationElement getConfigurationElement() {
178: return configurationElement;
179: }
180:
181: @Override
182: @SuppressWarnings("unchecked")
183: protected ELEMENT resolve() throws Exception {
184: return (ELEMENT) configurationElement.createExecutableExtension(getClassAttributeName());
185: }
186:
187: protected String getClassAttributeName() {
188: return "class"; //$NON-NLS-1$
189: }
190: }
191: }