C++ JSValue::asBoolean方法代码示例

static RefPtr<InspectorValue> jsToInspectorValue(ExecState* scriptState, JSValue value, int maxDepth)
{
    if (!value) {
        ASSERT_NOT_REACHED();
        return nullptr;
    }

    if (!maxDepth)
        return nullptr;

    maxDepth--;

    if (value.isNull() || value.isUndefined())
        return InspectorValue::null();
    if (value.isBoolean())
        return InspectorValue::create(value.asBoolean());
    if (value.isNumber() && value.isDouble())
        return InspectorValue::create(value.asNumber());
    if (value.isNumber() && value.isMachineInt())
        return InspectorValue::create(static_cast<int>(value.asMachineInt()));
    if (value.isString())
        return InspectorValue::create(value.getString(scriptState));

    if (value.isObject()) {
        if (isJSArray(value)) {
            Ref<InspectorArray> inspectorArray = InspectorArray::create();
            JSArray* array = asArray(value);
            unsigned length = array->length();
            for (unsigned i = 0; i < length; i++) {
                JSValue element = array->getIndex(scriptState, i);
                RefPtr<InspectorValue> elementValue = jsToInspectorValue(scriptState, element, maxDepth);
                if (!elementValue)
                    return nullptr;
                inspectorArray->pushValue(WTFMove(elementValue));
            }
            return WTFMove(inspectorArray);
        }
        Ref<InspectorObject> inspectorObject = InspectorObject::create();
        JSObject* object = value.getObject();
        PropertyNameArray propertyNames(scriptState, PropertyNameMode::Strings);
        object->methodTable()->getOwnPropertyNames(object, scriptState, propertyNames, EnumerationMode());
        for (size_t i = 0; i < propertyNames.size(); i++) {
            const Identifier& name = propertyNames[i];
            JSValue propertyValue = object->get(scriptState, name);
            RefPtr<InspectorValue> inspectorValue = jsToInspectorValue(scriptState, propertyValue, maxDepth);
            if (!inspectorValue)
                return nullptr;
            inspectorObject->setValue(name.string(), WTFMove(inspectorValue));
        }
        return WTFMove(inspectorObject);
    }

    ASSERT_NOT_REACHED();
    return nullptr;
}

static PassRefPtr<InspectorValue> jsToInspectorValue(ScriptState* scriptState, JSValue value, int maxDepth)
{
    if (!value) {
        ASSERT_NOT_REACHED();
        return 0;
    }

    if (!maxDepth)
        return 0;
    maxDepth--;

    if (value.isNull() || value.isUndefined())
        return InspectorValue::null();
    if (value.isBoolean())
        return InspectorBasicValue::create(value.asBoolean());
    if (value.isNumber())
        return InspectorBasicValue::create(value.asNumber());
    if (value.isString()) {
        String s = value.getString(scriptState);
        return InspectorString::create(String(s.characters(), s.length()));
    }
    if (value.isObject()) {
        if (isJSArray(value)) {
            RefPtr<InspectorArray> inspectorArray = InspectorArray::create();
            JSArray* array = asArray(value);
            unsigned length = array->length();
            for (unsigned i = 0; i < length; i++) {
                // FIXME: What if the array is in sparse mode? https://bugs.webkit.org/show_bug.cgi?id=95610
                JSValue element = array->getIndexQuickly(i);
                RefPtr<InspectorValue> elementValue = jsToInspectorValue(scriptState, element, maxDepth);
                if (!elementValue)
                    return 0;
                inspectorArray->pushValue(elementValue);
            }
            return inspectorArray;
        }
        RefPtr<InspectorObject> inspectorObject = InspectorObject::create();
        JSObject* object = value.getObject();
        PropertyNameArray propertyNames(scriptState);
        object->methodTable()->getOwnPropertyNames(object, scriptState, propertyNames, ExcludeDontEnumProperties);
        for (size_t i = 0; i < propertyNames.size(); i++) {
            const Identifier& name =  propertyNames[i];
            JSValue propertyValue = object->get(scriptState, name);
            RefPtr<InspectorValue> inspectorValue = jsToInspectorValue(scriptState, propertyValue, maxDepth);
            if (!inspectorValue)
                return 0;
            inspectorObject->setValue(String(name.characters(), name.length()), inspectorValue);
        }
        return inspectorObject;
    }
    ASSERT_NOT_REACHED();
    return 0;
}

static bool getBooleanFromJSON(ExecState* exec, JSObject* json, const char* key, bool& result)
{
    Identifier identifier(exec, key);
    PropertySlot slot(json);

    if (!json->getPropertySlot(exec, identifier, slot))
        return false;

    JSValue jsValue = slot.getValue(exec, identifier);
    ASSERT(!exec->hadException());
    if (!jsValue.isBoolean()) {
        throwTypeError(exec, String::format("Expected a boolean value for \"%s\" JSON key",  key));
        return false;
    }

    result = jsValue.asBoolean();
    return true;
}

jvalue convertValueToJValue(ExecState* exec, RootObject* rootObject, JSValue value, JavaType javaType, const char* javaClassName)
{
    JSLock lock(SilenceAssertionsOnly);

    jvalue result;
    memset(&result, 0, sizeof(jvalue));

    switch (javaType) {
    case JavaTypeArray:
    case JavaTypeObject:
        {
            // FIXME: JavaJSObject::convertValueToJObject functionality is almost exactly the same,
            // these functions should use common code.

            if (value.isObject()) {
                JSObject* object = asObject(value);
                if (object->inherits(&JavaRuntimeObject::s_info)) {
                    // Unwrap a Java instance.
                    JavaRuntimeObject* runtimeObject = static_cast<JavaRuntimeObject*>(object);
                    JavaInstance* instance = runtimeObject->getInternalJavaInstance();
                    if (instance)
                        result.l = instance->javaInstance();
                } else if (object->classInfo() == &RuntimeArray::s_info) {
                    // Input is a JavaScript Array that was originally created from a Java Array
                    RuntimeArray* imp = static_cast<RuntimeArray*>(object);
                    JavaArray* array = static_cast<JavaArray*>(imp->getConcreteArray());
                    result.l = array->javaArray();
                } else if (object->classInfo() == &JSArray::s_info) {
                    // Input is a Javascript Array. We need to create it to a Java Array.
                    result.l = convertArrayInstanceToJavaArray(exec, asArray(value), javaClassName);
                } else if ((!result.l && (!strcmp(javaClassName, "java.lang.Object")))
                           || (!strcmp(javaClassName, "netscape.javascript.JSObject"))) {
                    // Wrap objects in JSObject instances.
                    JNIEnv* env = getJNIEnv();
                    jclass jsObjectClass = env->FindClass("sun/plugin/javascript/webkit/JSObject");
                    jmethodID constructorID = env->GetMethodID(jsObjectClass, "<init>", "(J)V");
                    if (constructorID) {
                        jlong nativeHandle = ptr_to_jlong(object);
                        rootObject->gcProtect(object);
                        result.l = env->NewObject(jsObjectClass, constructorID, nativeHandle);
                    }
                }
            }

            // Create an appropriate Java object if target type is java.lang.Object.
            if (!result.l && !strcmp(javaClassName, "java.lang.Object")) {
                if (value.isString()) {
                    UString stringValue = asString(value)->value(exec);
                    JNIEnv* env = getJNIEnv();
                    jobject javaString = env->functions->NewString(env, (const jchar*)stringValue.characters(), stringValue.length());
                    result.l = javaString;
                } else if (value.isNumber()) {
                    double doubleValue = value.asNumber();
                    JNIEnv* env = getJNIEnv();
                    jclass clazz = env->FindClass("java/lang/Double");
                    jmethodID constructor = env->GetMethodID(clazz, "<init>", "(D)V");
                    jobject javaDouble = env->functions->NewObject(env, clazz, constructor, doubleValue);
                    result.l = javaDouble;
                } else if (value.isBoolean()) {
                    bool boolValue = value.asBoolean();
                    JNIEnv* env = getJNIEnv();
                    jclass clazz = env->FindClass("java/lang/Boolean");
                    jmethodID constructor = env->GetMethodID(clazz, "<init>", "(Z)V");
                    jobject javaBoolean = env->functions->NewObject(env, clazz, constructor, boolValue);
                    result.l = javaBoolean;
                } else if (value.isUndefined()) {
                    UString stringValue = "undefined";
                    JNIEnv* env = getJNIEnv();
                    jobject javaString = env->functions->NewString(env, (const jchar*)stringValue.characters(), stringValue.length());
                    result.l = javaString;
                }
            }

            // Convert value to a string if the target type is a java.lang.String, and we're not
            // converting from a null.
            if (!result.l && !strcmp(javaClassName, "java.lang.String")) {
                if (!value.isNull()) {
                    UString stringValue = value.toString(exec);
                    JNIEnv* env = getJNIEnv();
                    jobject javaString = env->functions->NewString(env, (const jchar*)stringValue.characters(), stringValue.length());
                    result.l = javaString;
                }
            }
        }
        break;

    case JavaTypeBoolean:
        {
            result.z = (jboolean)value.toNumber(exec);
        }
        break;

    case JavaTypeByte:
        {
            result.b = (jbyte)value.toNumber(exec);
        }
        break;

    case JavaTypeChar:
        {
//.........这里部分代码省略.........