| /* |
| * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.runtime; |
| |
| import java.util.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.debugger.cdbg.CDebugger; |
| import sun.jvm.hotspot.debugger.cdbg.ClosestSymbol; |
| import sun.jvm.hotspot.debugger.cdbg.LoadObject; |
| import sun.jvm.hotspot.types.*; |
| import sun.jvm.hotspot.HotSpotTypeDataBase; |
| |
| /** This provides a factory to create instances where the base virtual |
| * type is know and the expected subclasses are within a particular |
| * package. */ |
| |
| public class VirtualBaseConstructor<T> extends InstanceConstructor { |
| private TypeDataBase db; |
| private HashMap map; // Map<String, Class> |
| private Type baseType; |
| private Class unknownTypeHandler; |
| |
| public VirtualBaseConstructor(TypeDataBase db, Type baseType, String packageName, Class unknownTypeHandler) { |
| this.db = (HotSpotTypeDataBase)db; |
| map = new HashMap(); |
| this.baseType = baseType; |
| this.unknownTypeHandler = unknownTypeHandler; |
| if (packageName != null) { |
| // Try to find mirror types for each of the types. If there isn't |
| // a direct mirror then try to find an instantiable superclass and |
| // treat it as that. |
| for (Iterator iter = db.getTypes(); iter.hasNext(); ) { |
| Type t = (Type) iter.next(); |
| Type superType = t; |
| while (superType != null && superType != baseType) { |
| superType = superType.getSuperclass(); |
| } |
| if (superType == baseType) { |
| superType = t; |
| Class c = null; |
| while (c == null && superType != null) { |
| try { |
| c = Class.forName(packageName + "." + superType.getName()); |
| } catch (Exception e) { |
| } |
| if (c == null) superType = superType.getSuperclass(); |
| } |
| if (c == null) { |
| c = unknownTypeHandler; |
| } |
| map.put(t.getName(), c); |
| } |
| } |
| } |
| } |
| |
| /** Adds a mapping from the given C++ type name to the given Java |
| class. The latter must be a subclass of |
| sun.jvm.hotspot.runtime.VMObject. Returns false if there was |
| already a class for this type name in the map. */ |
| public boolean addMapping(String cTypeName, Class clazz) { |
| if (map.get(cTypeName) != null) { |
| return false; |
| } |
| |
| map.put(cTypeName, clazz); |
| return true; |
| } |
| |
| /** Instantiate the most-precisely typed wrapper object available |
| for the type of the given Address. If no type in the mapping |
| matched the type of the Address, throws a WrongTypeException. |
| Returns null for a null address (similar behavior to |
| VMObjectFactory). */ |
| public T instantiateWrapperFor(Address addr) throws WrongTypeException { |
| if (addr == null) { |
| return null; |
| } |
| |
| Type type = db.findDynamicTypeForAddress(addr, baseType); |
| if (type != null) { |
| return (T) VMObjectFactory.newObject((Class) map.get(type.getName()), addr); |
| } else if (unknownTypeHandler != null) { |
| return (T) VMObjectFactory.newObject(unknownTypeHandler, addr); |
| } |
| |
| throw newWrongTypeException(addr); |
| } |
| } |