Mercurial > projects > dwt2
view org.eclipse.core.databinding/src/org/eclipse/core/internal/databinding/ClassLookupSupport.d @ 78:0a55d2d5a946
Added file for databinding
author | Frank Benoit <benoit@tionex.de> |
---|---|
date | Tue, 14 Apr 2009 11:35:29 +0200 |
parents | |
children | 6be48cf9f95c |
line wrap: on
line source
/******************************************************************************* * Copyright (c) 2006 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 ******************************************************************************/ module org.eclipse.core.internal.databinding.ClassLookupSupport; import java.lang.all; import java.util.ArrayList; import java.util.Collection; import java.util.HashMap; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Set; /** * @since 1.0 * */ public class ClassLookupSupport { /* * code copied from AdapterManager.java */ private static HashMap classSearchOrderLookup; /** * For a given class or interface, return an array containing the given type and all its direct and indirect supertypes. * @param type * @return an array containing the given type and all its direct and indirect supertypes */ public static ClassInfo[] getTypeHierarchyFlattened(ClassInfo type) { List classes = null; //cache reference to lookup to protect against concurrent flush HashMap lookup = classSearchOrderLookup; if (lookup !is null) classes = cast(List) lookup.get(type); // compute class order only if it hasn't been cached before if (classes is null) { classes = new ArrayList(); computeClassOrder(type, classes); if (lookup is null) classSearchOrderLookup = lookup = new HashMap(); lookup.put(type, classes); } return cast(ClassInfo[]) classes.toArray(new ClassInfo[classes.size()]); } /** * Builds and returns a table of adapters for the given adaptable type. * The table is keyed by adapter class name. The * value is the <b>sole<b> factory that defines that adapter. Note that * if multiple adapters technically define the same property, only the * first found in the search order is considered. * * Note that it is important to maintain a consistent class and interface * lookup order. See the class comment for more details. */ private static void computeClassOrder(ClassInfo adaptable, Collection classes) { ClassInfo clazz = adaptable; Set seen = new HashSet(4); while (clazz !is null) { classes.add(clazz); computeInterfaceOrder(clazz.getInterfaces(), classes, seen); clazz = clazz.isInterface() ? Object.classinfo : clazz.getSuperclass(); } } private static void computeInterfaceOrder(ClassInfo[] interfaces, Collection classes, Set seen) { List newInterfaces = new ArrayList(interfaces.length); for (int i = 0; i < interfaces.length; i++) { ClassInfo interfac = interfaces[i]; if (seen.add(interfac)) { //note we cannot recurse here without changing the resulting interface order classes.add(interfac); newInterfaces.add(interfac); } } for (Iterator it = newInterfaces.iterator(); it.hasNext();) computeInterfaceOrder((cast(ClassInfo) it.next()).getInterfaces(), classes, seen); } }