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The source code/******************************************************************************* * Copyright (c) 2000, 2005 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.ui.internal.texteditor; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.eclipse.core.runtime.IConfigurationElement; import org.eclipse.core.runtime.IExtensionPoint; import org.eclipse.core.runtime.Platform; import org.eclipse.ui.editors.text.EditorsUI; /** * Internal annotation super type hierarchy cache. * TODO this cache is currently unbound, i.e. only limited by the number of annotation types * * @since 3.0 */ public final class AnnotationTypeHierarchy { private Map fTypeMap; private Map fTypesCache= new HashMap(); public AnnotationTypeHierarchy() { } public AnnotationType getAnnotationType(String typeName) { AnnotationType type= (AnnotationType) fTypesCache.get(typeName); if (type == null) { String[] superTypes= computeSuperTypes(typeName); type= new AnnotationType(typeName, superTypes); fTypesCache.put(typeName, type); } return type; } public boolean isSubtype(String superType, String subtypeCandidate) { AnnotationType type= getAnnotationType(subtypeCandidate); return type.isSubtype(superType); } private String[] computeSuperTypes(String typeName) { ArrayList types= new ArrayList(); append(types, getDirectSuperType(typeName)); int index= 0; while (index < types.size()) { String type= (String) types.get(index++); append(types, getDirectSuperType(type)); } String[] superTypes= new String[types.size()]; types.toArray(superTypes); return superTypes; } private String getDirectSuperType(String typeName) { return (String) getTypeMap().get(typeName); } private void append(List list, String string) { if (string == null || string.trim().length() == 0) return; if (!list.contains(string)) list.add(string); } private Map getTypeMap() { if (fTypeMap == null) fTypeMap= readTypes(); return fTypeMap; } private Map readTypes() { HashMap allTypes= new HashMap(); IExtensionPoint extensionPoint= Platform.getExtensionRegistry().getExtensionPoint(EditorsUI.PLUGIN_ID, "annotationTypes"); //$NON-NLS-1$ if (extensionPoint != null) { IConfigurationElement[] elements= extensionPoint.getConfigurationElements(); for (int i= 0; i < elements.length; i++) { IConfigurationElement element= elements[i]; String name= element.getAttribute("name"); //$NON-NLS-1$ if (name == null || name.trim().length() == 0) continue; String parent= element.getAttribute("super"); //$NON-NLS-1$ if (parent == null || parent.trim().length() == 0) parent= ""; //$NON-NLS-1$ allTypes.put(name, parent); } } return allTypes; } } |
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