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Diffstat (limited to 'bundles/org.eclipse.compare/compare/org/eclipse/compare/internal/CompareFilterDescriptor.java')
-rw-r--r--bundles/org.eclipse.compare/compare/org/eclipse/compare/internal/CompareFilterDescriptor.java110
1 files changed, 110 insertions, 0 deletions
diff --git a/bundles/org.eclipse.compare/compare/org/eclipse/compare/internal/CompareFilterDescriptor.java b/bundles/org.eclipse.compare/compare/org/eclipse/compare/internal/CompareFilterDescriptor.java
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index 000000000..bfddb2e80
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+++ b/bundles/org.eclipse.compare/compare/org/eclipse/compare/internal/CompareFilterDescriptor.java
@@ -0,0 +1,110 @@
+/*******************************************************************************
+ * Copyright (c) 2013 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.compare.internal;
+
+import java.net.URL;
+import java.util.Enumeration;
+import java.util.ResourceBundle;
+
+import org.eclipse.compare.ICompareFilter;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.FileLocator;
+import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.Path;
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.jface.resource.ImageDescriptor;
+import org.osgi.framework.Bundle;
+
+/**
+ * Describes compare filter extension.
+ */
+public class CompareFilterDescriptor {
+
+ private final static String CLASS_ATTRIBUTE = "class"; //$NON-NLS-1$
+ private final static String ID_ATTRIBUTE = "id"; //$NON-NLS-1$
+ private final static String DEFINITION_ID_ATTRIBUTE = "definitionId"; //$NON-NLS-1$
+ private final static String FILTER_IMAGE_ATTRIBUTE = "filter.image"; //$NON-NLS-1$
+
+ private IConfigurationElement fConfiguration;
+ private ResourceBundle fResourceBundle;
+ private ImageDescriptor fImageDescriptor;
+
+ private class ConfigurationKeysEnumeration implements Enumeration {
+
+ private String[] keySet;
+ private int cursor = 0;
+
+ public ConfigurationKeysEnumeration(IConfigurationElement configuration) {
+ super();
+ this.keySet = configuration.getAttributeNames();
+ }
+
+ public boolean hasMoreElements() {
+ return cursor >= keySet.length;
+ }
+
+ public Object nextElement() {
+ return keySet[cursor++];
+ }
+
+ }
+
+ public CompareFilterDescriptor(IConfigurationElement config) {
+ fConfiguration = config;
+ fResourceBundle = new ResourceBundle() {
+ protected Object handleGetObject(String key) {
+ return fConfiguration.getAttribute(key);
+ }
+
+ public Enumeration getKeys() {
+ return new ConfigurationKeysEnumeration(fConfiguration);
+ }
+ };
+
+ URL url = null;
+ String pluginId = fConfiguration.getContributor().getName();
+ Bundle bundle = Platform.getBundle(pluginId);
+ if (bundle != null) {
+ String path = Utilities.getString(fResourceBundle,
+ FILTER_IMAGE_ATTRIBUTE, FILTER_IMAGE_ATTRIBUTE);
+ if (path != null)
+ url = FileLocator.find(bundle, new Path(path), null);
+ }
+ fImageDescriptor = (url == null) ? null : ImageDescriptor
+ .createFromURL(url);
+ }
+
+ public ICompareFilter createCompareFilter() {
+ try {
+ return (ICompareFilter) fConfiguration
+ .createExecutableExtension(CLASS_ATTRIBUTE);
+ } catch (CoreException e) {
+ CompareUIPlugin.log(e);
+ }
+ return null;
+ }
+
+ public String getFilterId() {
+ return fConfiguration.getAttribute(ID_ATTRIBUTE);
+ }
+
+ public String getDefinitionId() {
+ return fConfiguration.getAttribute(DEFINITION_ID_ATTRIBUTE);
+ }
+
+ public ResourceBundle getResourceBundle() {
+ return fResourceBundle;
+ }
+
+ public ImageDescriptor getImageDescriptor() {
+ return fImageDescriptor;
+ }
+}

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