Source/WebCore/bridge/jni/jsc/JavaInstanceJSC.cpp - platform/external/webkit - Git at Google

 /*
  * Copyright (C) 2003, 2008, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include "config.h"
 #include "JavaInstanceJSC.h"

 #if ENABLE(JAVA_BRIDGE)

 #include "JavaRuntimeObject.h"
 #include "JNIUtilityPrivate.h"
 #include "JSDOMBinding.h"
 #include "JavaArrayJSC.h"
 #include "JavaClassJSC.h"
 #include "JavaMethod.h"
 #include "JavaString.h"
 #include "Logging.h"
 #include "jni_jsobject.h"
 #include "runtime_method.h"
 #include "runtime_object.h"
 #include "runtime_root.h"
 #include <runtime/ArgList.h>
 #include <runtime/Error.h>
 #include <runtime/FunctionPrototype.h>
 #include <runtime/JSLock.h>

 using namespace JSC::Bindings;
 using namespace JSC;
 using namespace WebCore;

 JavaInstance::JavaInstance(jobject instance, PassRefPtr<RootObject> rootObject)
     : Instance(rootObject)
 {
     m_instance = new JobjectWrapper(instance);
     m_class = 0;
 }

 JavaInstance::~JavaInstance()
 {
     delete m_class;
 }

 RuntimeObject* JavaInstance::newRuntimeObject(ExecState* exec)
 {
     return new (exec) JavaRuntimeObject(exec, exec->lexicalGlobalObject(), this);
 }

 #define NUM_LOCAL_REFS 64

 void JavaInstance::virtualBegin()
 {
     getJNIEnv()->PushLocalFrame(NUM_LOCAL_REFS);
 }

 void JavaInstance::virtualEnd()
 {
     getJNIEnv()->PopLocalFrame(0);
 }

 Class* JavaInstance::getClass() const
 {
     if (!m_class)
         m_class = new JavaClass (m_instance->m_instance);
     return m_class;
 }

 JSValue JavaInstance::stringValue(ExecState* exec) const
 {
     JSLock lock(SilenceAssertionsOnly);

     jstring stringValue = (jstring)callJNIMethod<jobject>(m_instance->m_instance, "toString", "()Ljava/lang/String;");

     // Should throw a JS exception, rather than returning ""? - but better than a null dereference.
     if (!stringValue)
         return jsString(exec, UString());

     JNIEnv* env = getJNIEnv();
     const jchar* c = getUCharactersFromJStringInEnv(env, stringValue);
     UString u((const UChar*)c, (int)env->GetStringLength(stringValue));
     releaseUCharactersForJStringInEnv(env, stringValue, c);
     return jsString(exec, u);
 }

 JSValue JavaInstance::numberValue(ExecState*) const
 {
     jdouble doubleValue = callJNIMethod<jdouble>(m_instance->m_instance, "doubleValue", "()D");
     return jsNumber(doubleValue);
 }

 JSValue JavaInstance::booleanValue() const
 {
     jboolean booleanValue = callJNIMethod<jboolean>(m_instance->m_instance, "booleanValue", "()Z");
     return jsBoolean(booleanValue);
 }

 class JavaRuntimeMethod : public RuntimeMethod {
 public:
     JavaRuntimeMethod(ExecState* exec, JSGlobalObject* globalObject, const Identifier& name, Bindings::MethodList& list)
         // FIXME: deprecatedGetDOMStructure uses the prototype off of the wrong global object
         // We need to pass in the right global object for "i".
         : RuntimeMethod(exec, globalObject, WebCore::deprecatedGetDOMStructure<JavaRuntimeMethod>(exec), name, list)
     {
         ASSERT(inherits(&s_info));
     }

     static Structure* createStructure(JSGlobalData& globalData, JSValue prototype)
     {
         return Structure::create(globalData, prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount, &s_info);
     }

     static const ClassInfo s_info;
 };

 const ClassInfo JavaRuntimeMethod::s_info = { "JavaRuntimeMethod", &RuntimeMethod::s_info, 0, 0 };

 JSValue JavaInstance::getMethod(ExecState* exec, const Identifier& propertyName)
 {
     MethodList methodList = getClass()->methodsNamed(propertyName, this);
     return new (exec) JavaRuntimeMethod(exec, exec->lexicalGlobalObject(), propertyName, methodList);
 }

 JSValue JavaInstance::invokeMethod(ExecState* exec, RuntimeMethod* runtimeMethod)
 {
     if (!asObject(runtimeMethod)->inherits(&JavaRuntimeMethod::s_info))
         return throwError(exec, createTypeError(exec, "Attempt to invoke non-Java method on Java object."));

     const MethodList& methodList = *runtimeMethod->methods();

     int i;
     int count = exec->argumentCount();
     JSValue resultValue;
     Method* method = 0;
     size_t numMethods = methodList.size();

     // Try to find a good match for the overloaded method.  The
     // fundamental problem is that JavaScript doesn't have the
     // notion of method overloading and Java does.  We could
     // get a bit more sophisticated and attempt to does some
     // type checking as we as checking the number of parameters.
     for (size_t methodIndex = 0; methodIndex < numMethods; methodIndex++) {
         Method* aMethod = methodList[methodIndex];
         if (aMethod->numParameters() == count) {
             method = aMethod;
             break;
         }
     }
     if (!method) {
         LOG(LiveConnect, "JavaInstance::invokeMethod unable to find an appropiate method");
         return jsUndefined();
     }

     const JavaMethod* jMethod = static_cast<const JavaMethod*>(method);
     LOG(LiveConnect, "JavaInstance::invokeMethod call %s %s on %p", UString(jMethod->name().impl()).utf8().data(), jMethod->signature(), m_instance->m_instance);

     Vector<jvalue> jArgs(count);

     for (i = 0; i < count; i++) {
         CString javaClassName = jMethod->parameterAt(i).utf8();
         jArgs[i] = convertValueToJValue(exec, m_rootObject.get(), exec->argument(i), javaTypeFromClassName(javaClassName.data()), javaClassName.data());
         LOG(LiveConnect, "JavaInstance::invokeMethod arg[%d] = %s", i, exec->argument(i).toString(exec).ascii().data());
     }

     jvalue result;

     // Try to use the JNI abstraction first, otherwise fall back to
     // normal JNI.  The JNI dispatch abstraction allows the Java plugin
     // to dispatch the call on the appropriate internal VM thread.
     RootObject* rootObject = this->rootObject();
     if (!rootObject)
         return jsUndefined();

     bool handled = false;
     if (rootObject->nativeHandle()) {
         jobject obj = m_instance->m_instance;
         JSValue exceptionDescription;
         const char *callingURL = 0; // FIXME, need to propagate calling URL to Java
         jmethodID methodId = getMethodID(obj, jMethod->name().utf8().data(), jMethod->signature());
         handled = dispatchJNICall(exec, rootObject->nativeHandle(), obj, jMethod->isStatic(), jMethod->returnType(), methodId, jArgs.data(), result, callingURL, exceptionDescription);
         if (exceptionDescription) {
             throwError(exec, createError(exec, exceptionDescription.toString(exec)));
             return jsUndefined();
         }
     }

 // This is a deprecated code path which should not be required on Android.
 // Remove this guard once Bug 39476 is fixed.
 #if PLATFORM(ANDROID) || defined(BUILDING_ON_TIGER)
     if (!handled)
         result = callJNIMethod(m_instance->m_instance, jMethod->returnType(), jMethod->name().utf8().data(), jMethod->signature(), jArgs.data());
 #endif

     switch (jMethod->returnType()) {
     case JavaTypeVoid:
         {
             resultValue = jsUndefined();
         }
         break;

     case JavaTypeObject:
         {
             if (result.l) {
                 // FIXME: JavaTypeArray return type is handled below, can we actually get an array here?
                 const char* arrayType = jMethod->returnTypeClassName();
                 if (arrayType[0] == '[')
                     resultValue = JavaArray::convertJObjectToArray(exec, result.l, arrayType, rootObject);
                 else {
                     jobject classOfInstance = callJNIMethod<jobject>(result.l, "getClass", "()Ljava/lang/Class;");
                     jstring className = static_cast<jstring>(callJNIMethod<jobject>(classOfInstance, "getName", "()Ljava/lang/String;"));
                     if (!strcmp(JavaString(className).utf8(), "sun.plugin.javascript.webkit.JSObject")) {
                         // Pull the nativeJSObject value from the Java instance.  This is a pointer to the JSObject.
                         JNIEnv* env = getJNIEnv();
                         jfieldID fieldID = env->GetFieldID(static_cast<jclass>(classOfInstance), "nativeJSObject", "J");
                         jlong nativeHandle = env->GetLongField(result.l, fieldID);
                         // FIXME: Handling of undefined values differs between functions in JNIUtilityPrivate.cpp and those in those in jni_jsobject.mm,
                         // and so it does between different versions of LiveConnect spec. There should not be multiple code paths to do the same work.
                         if (nativeHandle == 1 /* UndefinedHandle */)
                             return jsUndefined();
                         return static_cast<JSObject*>(jlong_to_ptr(nativeHandle));
                     } else
                         return JavaInstance::create(result.l, rootObject)->createRuntimeObject(exec);
                 }
             } else
                 return jsUndefined();
         }
         break;

     case JavaTypeBoolean:
         {
             resultValue = jsBoolean(result.z);
         }
         break;

     case JavaTypeByte:
         {
             resultValue = jsNumber(result.b);
         }
         break;

     case JavaTypeChar:
         {
             resultValue = jsNumber(result.c);
         }
         break;

     case JavaTypeShort:
         {
             resultValue = jsNumber(result.s);
         }
         break;

     case JavaTypeInt:
         {
             resultValue = jsNumber(result.i);
         }
         break;

     case JavaTypeLong:
         {
             resultValue = jsNumber(result.j);
         }
         break;

     case JavaTypeFloat:
         {
             resultValue = jsNumber(result.f);
         }
         break;

     case JavaTypeDouble:
         {
             resultValue = jsNumber(result.d);
         }
         break;

     case JavaTypeArray:
         {
             const char* arrayType = jMethod->returnTypeClassName();
             ASSERT(arrayType[0] == '[');
             resultValue = JavaArray::convertJObjectToArray(exec, result.l, arrayType, rootObject);
         }
         break;

     case JavaTypeInvalid:
         {
             resultValue = jsUndefined();
         }
         break;
     }

     return resultValue;
 }

 JSValue JavaInstance::defaultValue(ExecState* exec, PreferredPrimitiveType hint) const
 {
     if (hint == PreferString)
         return stringValue(exec);
     if (hint == PreferNumber)
         return numberValue(exec);
     JavaClass* aClass = static_cast<JavaClass*>(getClass());
     if (aClass->isStringClass())
         return stringValue(exec);
     if (aClass->isNumberClass())
         return numberValue(exec);
     if (aClass->isBooleanClass())
         return booleanValue();
     return valueOf(exec);
 }

 JSValue JavaInstance::valueOf(ExecState* exec) const
 {
     return stringValue(exec);
 }

 #endif // ENABLE(JAVA_BRIDGE)
	/*
	* Copyright (C) 2003, 2008, 2010 Apple Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include "config.h"
	#include "JavaInstanceJSC.h"

	#if ENABLE(JAVA_BRIDGE)

	#include "JavaRuntimeObject.h"
	#include "JNIUtilityPrivate.h"
	#include "JSDOMBinding.h"
	#include "JavaArrayJSC.h"
	#include "JavaClassJSC.h"
	#include "JavaMethod.h"
	#include "JavaString.h"
	#include "Logging.h"
	#include "jni_jsobject.h"
	#include "runtime_method.h"
	#include "runtime_object.h"
	#include "runtime_root.h"
	#include <runtime/ArgList.h>
	#include <runtime/Error.h>
	#include <runtime/FunctionPrototype.h>
	#include <runtime/JSLock.h>

	using namespace JSC::Bindings;
	using namespace JSC;
	using namespace WebCore;

	JavaInstance::JavaInstance(jobject instance, PassRefPtr<RootObject> rootObject)
	: Instance(rootObject)
	{
	m_instance = new JobjectWrapper(instance);
	m_class = 0;
	}

	JavaInstance::~JavaInstance()
	{
	delete m_class;
	}

	RuntimeObject* JavaInstance::newRuntimeObject(ExecState* exec)
	{
	return new (exec) JavaRuntimeObject(exec, exec->lexicalGlobalObject(), this);
	}

	#define NUM_LOCAL_REFS 64

	void JavaInstance::virtualBegin()
	{
	getJNIEnv()->PushLocalFrame(NUM_LOCAL_REFS);
	}

	void JavaInstance::virtualEnd()
	{
	getJNIEnv()->PopLocalFrame(0);
	}

	Class* JavaInstance::getClass() const
	{
	if (!m_class)
	m_class = new JavaClass (m_instance->m_instance);
	return m_class;
	}

	JSValue JavaInstance::stringValue(ExecState* exec) const
	{
	JSLock lock(SilenceAssertionsOnly);

	jstring stringValue = (jstring)callJNIMethod<jobject>(m_instance->m_instance, "toString", "()Ljava/lang/String;");

	// Should throw a JS exception, rather than returning ""? - but better than a null dereference.
	if (!stringValue)
	return jsString(exec, UString());

	JNIEnv* env = getJNIEnv();
	const jchar* c = getUCharactersFromJStringInEnv(env, stringValue);
	UString u((const UChar*)c, (int)env->GetStringLength(stringValue));
	releaseUCharactersForJStringInEnv(env, stringValue, c);
	return jsString(exec, u);
	}

	JSValue JavaInstance::numberValue(ExecState*) const
	{
	jdouble doubleValue = callJNIMethod<jdouble>(m_instance->m_instance, "doubleValue", "()D");
	return jsNumber(doubleValue);
	}

	JSValue JavaInstance::booleanValue() const
	{
	jboolean booleanValue = callJNIMethod<jboolean>(m_instance->m_instance, "booleanValue", "()Z");
	return jsBoolean(booleanValue);
	}

	class JavaRuntimeMethod : public RuntimeMethod {
	public:
	JavaRuntimeMethod(ExecState* exec, JSGlobalObject* globalObject, const Identifier& name, Bindings::MethodList& list)
	// FIXME: deprecatedGetDOMStructure uses the prototype off of the wrong global object
	// We need to pass in the right global object for "i".
	: RuntimeMethod(exec, globalObject, WebCore::deprecatedGetDOMStructure<JavaRuntimeMethod>(exec), name, list)
	{
	ASSERT(inherits(&s_info));
	}

	static Structure* createStructure(JSGlobalData& globalData, JSValue prototype)
	{
	return Structure::create(globalData, prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount, &s_info);
	}

	static const ClassInfo s_info;
	};

	const ClassInfo JavaRuntimeMethod::s_info = { "JavaRuntimeMethod", &RuntimeMethod::s_info, 0, 0 };

	JSValue JavaInstance::getMethod(ExecState* exec, const Identifier& propertyName)
	{
	MethodList methodList = getClass()->methodsNamed(propertyName, this);
	return new (exec) JavaRuntimeMethod(exec, exec->lexicalGlobalObject(), propertyName, methodList);
	}

	JSValue JavaInstance::invokeMethod(ExecState* exec, RuntimeMethod* runtimeMethod)
	{
	if (!asObject(runtimeMethod)->inherits(&JavaRuntimeMethod::s_info))
	return throwError(exec, createTypeError(exec, "Attempt to invoke non-Java method on Java object."));

	const MethodList& methodList = *runtimeMethod->methods();

	int i;
	int count = exec->argumentCount();
	JSValue resultValue;
	Method* method = 0;
	size_t numMethods = methodList.size();

	// Try to find a good match for the overloaded method. The
	// fundamental problem is that JavaScript doesn't have the
	// notion of method overloading and Java does. We could
	// get a bit more sophisticated and attempt to does some
	// type checking as we as checking the number of parameters.
	for (size_t methodIndex = 0; methodIndex < numMethods; methodIndex++) {
	Method* aMethod = methodList[methodIndex];
	if (aMethod->numParameters() == count) {
	method = aMethod;
	break;
	}
	}
	if (!method) {
	LOG(LiveConnect, "JavaInstance::invokeMethod unable to find an appropiate method");
	return jsUndefined();
	}

	const JavaMethod* jMethod = static_cast<const JavaMethod*>(method);
	LOG(LiveConnect, "JavaInstance::invokeMethod call %s %s on %p", UString(jMethod->name().impl()).utf8().data(), jMethod->signature(), m_instance->m_instance);

	Vector<jvalue> jArgs(count);

	for (i = 0; i < count; i++) {
	CString javaClassName = jMethod->parameterAt(i).utf8();
	jArgs[i] = convertValueToJValue(exec, m_rootObject.get(), exec->argument(i), javaTypeFromClassName(javaClassName.data()), javaClassName.data());
	LOG(LiveConnect, "JavaInstance::invokeMethod arg[%d] = %s", i, exec->argument(i).toString(exec).ascii().data());
	}

	jvalue result;

	// Try to use the JNI abstraction first, otherwise fall back to
	// normal JNI. The JNI dispatch abstraction allows the Java plugin
	// to dispatch the call on the appropriate internal VM thread.
	RootObject* rootObject = this->rootObject();
	if (!rootObject)
	return jsUndefined();

	bool handled = false;
	if (rootObject->nativeHandle()) {
	jobject obj = m_instance->m_instance;
	JSValue exceptionDescription;
	const char *callingURL = 0; // FIXME, need to propagate calling URL to Java
	jmethodID methodId = getMethodID(obj, jMethod->name().utf8().data(), jMethod->signature());
	handled = dispatchJNICall(exec, rootObject->nativeHandle(), obj, jMethod->isStatic(), jMethod->returnType(), methodId, jArgs.data(), result, callingURL, exceptionDescription);
	if (exceptionDescription) {
	throwError(exec, createError(exec, exceptionDescription.toString(exec)));
	return jsUndefined();
	}
	}

	// This is a deprecated code path which should not be required on Android.
	// Remove this guard once Bug 39476 is fixed.
	#if PLATFORM(ANDROID) \|\| defined(BUILDING_ON_TIGER)
	if (!handled)
	result = callJNIMethod(m_instance->m_instance, jMethod->returnType(), jMethod->name().utf8().data(), jMethod->signature(), jArgs.data());
	#endif

	switch (jMethod->returnType()) {
	case JavaTypeVoid:
	{
	resultValue = jsUndefined();
	}
	break;

	case JavaTypeObject:
	{
	if (result.l) {
	// FIXME: JavaTypeArray return type is handled below, can we actually get an array here?
	const char* arrayType = jMethod->returnTypeClassName();
	if (arrayType[0] == '[')
	resultValue = JavaArray::convertJObjectToArray(exec, result.l, arrayType, rootObject);
	else {
	jobject classOfInstance = callJNIMethod<jobject>(result.l, "getClass", "()Ljava/lang/Class;");
	jstring className = static_cast<jstring>(callJNIMethod<jobject>(classOfInstance, "getName", "()Ljava/lang/String;"));
	if (!strcmp(JavaString(className).utf8(), "sun.plugin.javascript.webkit.JSObject")) {
	// Pull the nativeJSObject value from the Java instance. This is a pointer to the JSObject.
	JNIEnv* env = getJNIEnv();
	jfieldID fieldID = env->GetFieldID(static_cast<jclass>(classOfInstance), "nativeJSObject", "J");
	jlong nativeHandle = env->GetLongField(result.l, fieldID);
	// FIXME: Handling of undefined values differs between functions in JNIUtilityPrivate.cpp and those in those in jni_jsobject.mm,
	// and so it does between different versions of LiveConnect spec. There should not be multiple code paths to do the same work.
	if (nativeHandle == 1 /* UndefinedHandle */)
	return jsUndefined();
	return static_cast<JSObject*>(jlong_to_ptr(nativeHandle));
	} else
	return JavaInstance::create(result.l, rootObject)->createRuntimeObject(exec);
	}
	} else
	return jsUndefined();
	}
	break;

	case JavaTypeBoolean:
	{
	resultValue = jsBoolean(result.z);
	}
	break;

	case JavaTypeByte:
	{
	resultValue = jsNumber(result.b);
	}
	break;

	case JavaTypeChar:
	{
	resultValue = jsNumber(result.c);
	}
	break;

	case JavaTypeShort:
	{
	resultValue = jsNumber(result.s);
	}
	break;

	case JavaTypeInt:
	{
	resultValue = jsNumber(result.i);
	}
	break;

	case JavaTypeLong:
	{
	resultValue = jsNumber(result.j);
	}
	break;

	case JavaTypeFloat:
	{
	resultValue = jsNumber(result.f);
	}
	break;

	case JavaTypeDouble:
	{
	resultValue = jsNumber(result.d);
	}
	break;

	case JavaTypeArray:
	{
	const char* arrayType = jMethod->returnTypeClassName();
	ASSERT(arrayType[0] == '[');
	resultValue = JavaArray::convertJObjectToArray(exec, result.l, arrayType, rootObject);
	}
	break;

	case JavaTypeInvalid:
	{
	resultValue = jsUndefined();
	}
	break;
	}

	return resultValue;
	}

	JSValue JavaInstance::defaultValue(ExecState* exec, PreferredPrimitiveType hint) const
	{
	if (hint == PreferString)
	return stringValue(exec);
	if (hint == PreferNumber)
	return numberValue(exec);
	JavaClass* aClass = static_cast<JavaClass*>(getClass());
	if (aClass->isStringClass())
	return stringValue(exec);
	if (aClass->isNumberClass())
	return numberValue(exec);
	if (aClass->isBooleanClass())
	return booleanValue();
	return valueOf(exec);
	}

	JSValue JavaInstance::valueOf(ExecState* exec) const
	{
	return stringValue(exec);
	}

	#endif // ENABLE(JAVA_BRIDGE)