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/*
* Copyright 2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
*/
package sun.jvm.hotspot.utilities.soql;
import java.lang.ref.*;
import java.util.*;
import sun.jvm.hotspot.oops.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.utilities.*;
public class JSJavaFactoryImpl implements JSJavaFactory {
public JSJavaObject newJSJavaObject(Oop oop) {
if (oop == null) return null;
SoftReference sref = (SoftReference) om.get(oop);
JSJavaObject res = (sref != null)? (JSJavaObject) sref.get() : null;
if (res == null) {
if (oop instanceof TypeArray) {
res = new JSJavaTypeArray((TypeArray)oop, this);
} else if (oop instanceof ObjArray) {
res = new JSJavaObjArray((ObjArray)oop, this);
} else if (oop instanceof Instance) {
res = newJavaInstance((Instance) oop);
} else if (oop instanceof Method) {
res = new JSJavaMethod((Method) oop, this);
}
}
if (res != null) {
om.put(oop, new SoftReference(res));
}
return res;
}
public JSJavaKlass newJSJavaKlass(Klass klass) {
JSJavaKlass res = null;
if (klass instanceof InstanceKlass) {
res = new JSJavaInstanceKlass((InstanceKlass) klass, this);
} else if (klass instanceof ObjArrayKlass) {
res = new JSJavaObjArrayKlass((ObjArrayKlass) klass, this);
} else if (klass instanceof TypeArrayKlass) {
res = new JSJavaTypeArrayKlass((TypeArrayKlass) klass, this);
}
if (res != null) {
om.put(klass, new SoftReference(res));
}
return res;
}
public JSJavaField newJSJavaField(Field field) {
if (field == null) return null;
return new JSJavaField(field, this);
}
public JSJavaThread newJSJavaThread(JavaThread jthread) {
if (jthread == null) return null;
return new JSJavaThread(jthread, this);
}
public JSJavaFrame newJSJavaFrame(JavaVFrame jvf) {
if (jvf == null) return null;
return new JSJavaFrame(jvf, this);
}
public JSList newJSList(List list) {
if (list == null) return null;
return new JSList(list, this);
}
public JSMap newJSMap(Map map) {
if (map == null) return null;
return new JSMap(map, this);
}
public Object newJSJavaWrapper(Object item) {
if (item == null) return null;
if (item instanceof Oop) {
return newJSJavaObject((Oop) item);
} else if (item instanceof Field) {
return newJSJavaField((Field) item);
} else if (item instanceof JavaThread) {
return newJSJavaThread((JavaThread) item);
} else if (item instanceof JavaVFrame) {
return newJSJavaFrame((JavaVFrame) item);
} else if (item instanceof List) {
return newJSList((List) item);
} else if (item instanceof Map) {
return newJSMap((Map) item);
} else {
// not-a-special-type, just return the input item
return item;
}
}
public JSJavaHeap newJSJavaHeap() {
return new JSJavaHeap(this);
}
public JSJavaVM newJSJavaVM() {
return new JSJavaVM(this);
}
// -- Internals only below this point
private Symbol javaLangString() {
if (javaLangString == null) {
javaLangString = getSymbol("java/lang/String");
}
return javaLangString;
}
private Symbol javaLangThread() {
if (javaLangThread == null) {
javaLangThread = getSymbol("java/lang/Thread");
}
return javaLangThread;
}
private Symbol javaLangClass() {
if (javaLangClass == null) {
javaLangClass = getSymbol("java/lang/Class");
}
return javaLangClass;
}
private Symbol getSymbol(String str) {
return VM.getVM().getSymbolTable().probe(str);
}
private JSJavaObject newJavaInstance(Instance instance) {
// look for well-known classes
Symbol className = instance.getKlass().getName();
if (Assert.ASSERTS_ENABLED) {
Assert.that(className != null, "Null class name");
}
JSJavaObject res = null;
if (className.equals(javaLangString())) {
res = new JSJavaString(instance, this);
} else if (className.equals(javaLangThread())) {
res = new JSJavaThread(instance, this);
} else if (className.equals(javaLangClass())) {
Klass reflectedType = OopUtilities.classOopToKlass(instance);
if (reflectedType != null) {
JSJavaKlass jk = newJSJavaKlass(reflectedType);
// we don't support mirrors of VM internal Klasses
if (jk == null) return null;
res = new JSJavaClass(instance, jk, this);
} else {
// for primitive Classes, the reflected type is null
return null;
}
} else {
// not a well-known class. But the base class may be
// one of the known classes.
Klass kls = instance.getKlass().getSuper();
while (kls != null) {
className = kls.getName();
// java.lang.Class and java.lang.String are final classes
if (className.equals(javaLangThread())) {
res = new JSJavaThread(instance, this);
break;
}
kls = kls.getSuper();
}
}
if (res == null) {
res = new JSJavaInstance(instance, this);
}
return res;
}
// Map<Oop, SoftReference<JSJavaObject>>
private Map om = new HashMap();
private Symbol javaLangString;
private Symbol javaLangThread;
private Symbol javaLangClass;
}
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