JSJavaFactoryImpl.java revision 9883:903a2e023ffb
1/* 2 * Copyright (c) 2004, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25package sun.jvm.hotspot.utilities.soql; 26 27import java.lang.ref.*; 28import java.util.*; 29import sun.jvm.hotspot.oops.*; 30import sun.jvm.hotspot.runtime.*; 31import sun.jvm.hotspot.utilities.*; 32 33public class JSJavaFactoryImpl implements JSJavaFactory { 34 public JSJavaObject newJSJavaObject(Oop oop) { 35 if (oop == null) return null; 36 SoftReference sref = (SoftReference) om.get(oop); 37 JSJavaObject res = (sref != null)? (JSJavaObject) sref.get() : null; 38 if (res == null) { 39 if (oop instanceof TypeArray) { 40 res = new JSJavaTypeArray((TypeArray)oop, this); 41 } else if (oop instanceof ObjArray) { 42 res = new JSJavaObjArray((ObjArray)oop, this); 43 } else if (oop instanceof Instance) { 44 res = newJavaInstance((Instance) oop); 45 } 46 } 47 if (res != null) { 48 om.put(oop, new SoftReference(res)); 49 } 50 return res; 51 } 52 53 public JSJavaKlass newJSJavaKlass(Klass klass) { 54 JSJavaKlass res = null; 55 if (klass instanceof InstanceKlass) { 56 res = new JSJavaInstanceKlass((InstanceKlass) klass, this); 57 } else if (klass instanceof ObjArrayKlass) { 58 res = new JSJavaObjArrayKlass((ObjArrayKlass) klass, this); 59 } else if (klass instanceof TypeArrayKlass) { 60 res = new JSJavaTypeArrayKlass((TypeArrayKlass) klass, this); 61 } 62 if (res != null) { 63 om.put(klass, new SoftReference(res)); 64 } 65 return res; 66 } 67 68 public JSJavaMethod newJSJavaMethod(Method method) { 69 JSJavaMethod res = new JSJavaMethod(method, this); 70 if (res != null) { 71 om.put(method, new SoftReference(res)); 72 } 73 return res; 74 } 75 76 public JSJavaField newJSJavaField(Field field) { 77 if (field == null) return null; 78 return new JSJavaField(field, this); 79 } 80 81 public JSJavaThread newJSJavaThread(JavaThread jthread) { 82 if (jthread == null) return null; 83 return new JSJavaThread(jthread, this); 84 } 85 86 public JSJavaFrame newJSJavaFrame(JavaVFrame jvf) { 87 if (jvf == null) return null; 88 return new JSJavaFrame(jvf, this); 89 } 90 91 public JSList newJSList(List list) { 92 if (list == null) return null; 93 return new JSList(list, this); 94 } 95 96 public JSMap newJSMap(Map map) { 97 if (map == null) return null; 98 return new JSMap(map, this); 99 } 100 101 public Object newJSJavaWrapper(Object item) { 102 if (item == null) return null; 103 if (item instanceof Oop) { 104 return newJSJavaObject((Oop) item); 105 } else if (item instanceof Field) { 106 return newJSJavaField((Field) item); 107 } else if (item instanceof JavaThread) { 108 return newJSJavaThread((JavaThread) item); 109 } else if (item instanceof JavaVFrame) { 110 return newJSJavaFrame((JavaVFrame) item); 111 } else if (item instanceof List) { 112 return newJSList((List) item); 113 } else if (item instanceof Map) { 114 return newJSMap((Map) item); 115 } else { 116 // not-a-special-type, just return the input item 117 return item; 118 } 119 } 120 121 public JSJavaHeap newJSJavaHeap() { 122 return new JSJavaHeap(this); 123 } 124 125 public JSJavaVM newJSJavaVM() { 126 return new JSJavaVM(this); 127 } 128 129 // -- Internals only below this point 130 private Symbol javaLangString() { 131 if (javaLangString == null) { 132 javaLangString = getSymbol("java/lang/String"); 133 } 134 return javaLangString; 135 } 136 137 private Symbol javaLangThread() { 138 if (javaLangThread == null) { 139 javaLangThread = getSymbol("java/lang/Thread"); 140 } 141 return javaLangThread; 142 } 143 144 private Symbol javaLangClass() { 145 if (javaLangClass == null) { 146 javaLangClass = getSymbol("java/lang/Class"); 147 } 148 return javaLangClass; 149 } 150 151 private Symbol getSymbol(String str) { 152 return VM.getVM().getSymbolTable().probe(str); 153 } 154 155 private JSJavaObject newJavaInstance(Instance instance) { 156 // look for well-known classes 157 Symbol className = instance.getKlass().getName(); 158 if (Assert.ASSERTS_ENABLED) { 159 Assert.that(className != null, "Null class name"); 160 } 161 JSJavaObject res = null; 162 if (className.equals(javaLangString())) { 163 res = new JSJavaString(instance, this); 164 } else if (className.equals(javaLangThread())) { 165 res = new JSJavaThread(instance, this); 166 } else if (className.equals(javaLangClass())) { 167 Klass reflectedType = java_lang_Class.asKlass(instance); 168 if (reflectedType != null) { 169 JSJavaKlass jk = newJSJavaKlass(reflectedType); 170 // we don't support mirrors of VM internal Klasses 171 if (jk == null) return null; 172 res = new JSJavaClass(instance, jk, this); 173 } else { 174 // for primitive Classes, the reflected type is null 175 return null; 176 } 177 } else { 178 // not a well-known class. But the base class may be 179 // one of the known classes. 180 Klass kls = instance.getKlass().getSuper(); 181 while (kls != null) { 182 className = kls.getName(); 183 // java.lang.Class and java.lang.String are final classes 184 if (className.equals(javaLangThread())) { 185 res = new JSJavaThread(instance, this); 186 break; 187 } 188 kls = kls.getSuper(); 189 } 190 } 191 if (res == null) { 192 res = new JSJavaInstance(instance, this); 193 } 194 return res; 195 } 196 197 // Map<Oop, SoftReference<JSJavaObject>> 198 private Map om = new HashMap(); 199 private Symbol javaLangString; 200 private Symbol javaLangThread; 201 private Symbol javaLangClass; 202} 203