diff options
Diffstat (limited to 'JavaScriptCore/bindings/jni/jni_instance.cpp')
| -rw-r--r-- | JavaScriptCore/bindings/jni/jni_instance.cpp | 353 |
1 files changed, 353 insertions, 0 deletions
diff --git a/JavaScriptCore/bindings/jni/jni_instance.cpp b/JavaScriptCore/bindings/jni/jni_instance.cpp new file mode 100644 index 0000000..d5d89aa --- /dev/null +++ b/JavaScriptCore/bindings/jni/jni_instance.cpp @@ -0,0 +1,353 @@ +/* + * Copyright (C) 2003 Apple Computer, 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 "jni_class.h" +#include "jni_instance.h" +#include "jni_runtime.h" +#include "jni_utility.h" +#include "runtime_object.h" +#include "runtime_root.h" + +#ifdef NDEBUG +#define JS_LOG(formatAndArgs...) ((void)0) +#else +#define JS_LOG(formatAndArgs...) { \ + fprintf (stderr, "%s:%d -- %s: ", __FILE__, __LINE__, __FUNCTION__); \ + fprintf(stderr, formatAndArgs); \ +} +#endif + +using namespace KJS::Bindings; +using namespace KJS; + +JavaInstance::JavaInstance (jobject instance, PassRefPtr<RootObject> rootObject) + : Instance(rootObject) +{ + _instance = new JObjectWrapper (instance); + _class = 0; +} + +JavaInstance::~JavaInstance () +{ + delete _class; +} + +#define NUM_LOCAL_REFS 64 + +void JavaInstance::begin() +{ + getJNIEnv()->PushLocalFrame (NUM_LOCAL_REFS); +} + +void JavaInstance::end() +{ + getJNIEnv()->PopLocalFrame (NULL); +} + +Class *JavaInstance::getClass() const +{ + if (_class == 0) + _class = new JavaClass (_instance->_instance); + return _class; +} + +JSValue *JavaInstance::stringValue() const +{ + JSLock lock; + + jstring stringValue = (jstring)callJNIObjectMethod (_instance->_instance, "toString", "()Ljava/lang/String;"); + JNIEnv *env = getJNIEnv(); + const jchar *c = getUCharactersFromJStringInEnv(env, stringValue); + UString u((const UChar *)c, (int)env->GetStringLength(stringValue)); + releaseUCharactersForJStringInEnv(env, stringValue, c); + return jsString(u); +} + +JSValue *JavaInstance::numberValue() const +{ + jdouble doubleValue = callJNIDoubleMethod (_instance->_instance, "doubleValue", "()D"); + return jsNumber(doubleValue); +} + +JSValue *JavaInstance::booleanValue() const +{ + jboolean booleanValue = callJNIBooleanMethod (_instance->_instance, "booleanValue", "()Z"); + return jsBoolean(booleanValue); +} + +JSValue *JavaInstance::invokeMethod (ExecState *exec, const MethodList &methodList, const List &args) +{ + int i, count = args.size(); + jvalue *jArgs; + 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 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. + Method *aMethod; + for (size_t methodIndex = 0; methodIndex < numMethods; methodIndex++) { + aMethod = methodList[methodIndex]; + if (aMethod->numParameters() == count) { + method = aMethod; + break; + } + } + if (method == 0) { + JS_LOG ("unable to find an appropiate method\n"); + return jsUndefined(); + } + + const JavaMethod *jMethod = static_cast<const JavaMethod*>(method); + JS_LOG ("call %s %s on %p\n", method->name(), jMethod->signature(), _instance->_instance); + + if (count > 0) { + jArgs = (jvalue *)malloc (count * sizeof(jvalue)); + } + else + jArgs = 0; + + for (i = 0; i < count; i++) { + JavaParameter* aParameter = jMethod->parameterAt(i); + jArgs[i] = convertValueToJValue (exec, args.at(i), aParameter->getJNIType(), aParameter->type()); + JS_LOG("arg[%d] = %s\n", i, args.at(i)->toString(exec).ascii()); + } + + jvalue result; + + // Try to use the JNI abstraction first, otherwise fall back to + // nornmal 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 = _instance->_instance; + JSValue *exceptionDescription = NULL; + const char *callingURL = 0; // FIXME, need to propagate calling URL to Java + handled = dispatchJNICall(rootObject->nativeHandle(), obj, jMethod->isStatic(), jMethod->JNIReturnType(), jMethod->methodID(obj), jArgs, result, callingURL, exceptionDescription); + if (exceptionDescription) { + throwError(exec, GeneralError, exceptionDescription->toString(exec)); + free (jArgs); + return jsUndefined(); + } + } + + // The following code can be conditionally removed once we have a Tiger update that + // contains the new Java plugin. It is needed for builds prior to Tiger. + if (!handled) { + jobject obj = _instance->_instance; + switch (jMethod->JNIReturnType()){ + case void_type: { + callJNIVoidMethodIDA (obj, jMethod->methodID(obj), jArgs); + } + break; + + case object_type: { + result.l = callJNIObjectMethodIDA (obj, jMethod->methodID(obj), jArgs); + } + break; + + case boolean_type: { + result.z = callJNIBooleanMethodIDA (obj, jMethod->methodID(obj), jArgs); + } + break; + + case byte_type: { + result.b = callJNIByteMethodIDA (obj, jMethod->methodID(obj), jArgs); + } + break; + + case char_type: { + result.c = callJNICharMethodIDA (obj, jMethod->methodID(obj), jArgs); + } + break; + + case short_type: { + result.s = callJNIShortMethodIDA (obj, jMethod->methodID(obj), jArgs); + } + break; + + case int_type: { + result.i = callJNIIntMethodIDA (obj, jMethod->methodID(obj), jArgs); + } + break; + + case long_type: { + result.j = callJNILongMethodIDA (obj, jMethod->methodID(obj), jArgs); + } + break; + + case float_type: { + result.f = callJNIFloatMethodIDA (obj, jMethod->methodID(obj), jArgs); + } + break; + + case double_type: { + result.d = callJNIDoubleMethodIDA (obj, jMethod->methodID(obj), jArgs); + } + break; + + case invalid_type: + default: { + } + break; + } + } + + switch (jMethod->JNIReturnType()){ + case void_type: { + resultValue = jsUndefined(); + } + break; + + case object_type: { + if (result.l != 0) { + const char *arrayType = jMethod->returnType(); + if (arrayType[0] == '[') { + resultValue = JavaArray::convertJObjectToArray(exec, result.l, arrayType, rootObject); + } + else { + resultValue = Instance::createRuntimeObject(Instance::JavaLanguage, result.l, rootObject); + } + } + else { + resultValue = jsUndefined(); + } + } + break; + + case boolean_type: { + resultValue = jsBoolean(result.z); + } + break; + + case byte_type: { + resultValue = jsNumber(result.b); + } + break; + + case char_type: { + resultValue = jsNumber(result.c); + } + break; + + case short_type: { + resultValue = jsNumber(result.s); + } + break; + + case int_type: { + resultValue = jsNumber(result.i); + } + break; + + case long_type: { + resultValue = jsNumber(result.j); + } + break; + + case float_type: { + resultValue = jsNumber(result.f); + } + break; + + case double_type: { + resultValue = jsNumber(result.d); + } + break; + + case invalid_type: + default: { + resultValue = jsUndefined(); + } + break; + } + + free (jArgs); + + return resultValue; +} + +JSValue *JavaInstance::defaultValue (JSType hint) const +{ + if (hint == StringType) { + return stringValue(); + } + else if (hint == NumberType) { + return numberValue(); + } + else if (hint == BooleanType) { + return booleanValue(); + } + else if (hint == UnspecifiedType) { + JavaClass *aClass = static_cast<JavaClass*>(getClass()); + if (aClass->isStringClass()) { + return stringValue(); + } + else if (aClass->isNumberClass()) { + return numberValue(); + } + else if (aClass->isBooleanClass()) { + return booleanValue(); + } + } + + return valueOf(); +} + +JSValue *JavaInstance::valueOf() const +{ + return stringValue(); +} + +JObjectWrapper::JObjectWrapper(jobject instance) +: _refCount(0) +{ + assert (instance != 0); + + // Cache the JNIEnv used to get the global ref for this java instanace. + // It'll be used to delete the reference. + _env = getJNIEnv(); + + _instance = _env->NewGlobalRef (instance); + + JS_LOG ("new global ref %p for %p\n", _instance, instance); + + if (_instance == NULL) { + fprintf (stderr, "%s: could not get GlobalRef for %p\n", __PRETTY_FUNCTION__, instance); + } +} + +JObjectWrapper::~JObjectWrapper() { + JS_LOG ("deleting global ref %p\n", _instance); + _env->DeleteGlobalRef (_instance); +} |