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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.java | 110 |
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 new file mode 100644 index 000000000..bfddb2e80 --- /dev/null +++ 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; + } +} |