Adding JNI methods as a faster reflection mechanism

This approach is only for the common cases of void-return,
single-argument float/int methods.

Change-Id: Ifb31535a6f717b85417eced93c579be6e461e039

1 files changed, 79 insertions, 0 deletions

diff --git a/core/jni/android_animation_PropertyValuesHolder.cpp b/core/jni/android_animation_PropertyValuesHolder.cpp
new file mode 100644
index 0000000..5991805
--- /dev/null
+++ b/core/jni/android_animation_PropertyValuesHolder.cpp
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <assert.h>
+
+#include "jni.h"
+#include <android_runtime/AndroidRuntime.h>
+#include <utils/misc.h>
+
+// ----------------------------------------------------------------------------
+
+namespace android {
+
+// ----------------------------------------------------------------------------
+
+const char* const kClassPathName = "android/animation/PropertyValuesHolder";
+
+static jmethodID android_animation_PropertyValuesHolder_getIntMethod(
+        JNIEnv* env, jclass pvhClass, jclass targetClass, jstring methodName)
+{
+    const char *nativeString = env->GetStringUTFChars(methodName, 0);
+    jmethodID mid = env->GetMethodID(targetClass, nativeString, "(I)V");
+    env->ReleaseStringUTFChars(methodName, nativeString);
+    return mid;
+}
+
+static jmethodID android_animation_PropertyValuesHolder_getFloatMethod(
+        JNIEnv* env, jclass pvhClass, jclass targetClass, jstring methodName)
+{
+    const char *nativeString = env->GetStringUTFChars(methodName, 0);
+    jmethodID mid = env->GetMethodID(targetClass, nativeString, "(F)V");
+    env->ReleaseStringUTFChars(methodName, nativeString);
+    return mid;
+}
+
+static void android_animation_PropertyValuesHolder_callIntMethod(
+        JNIEnv* env, jclass pvhObject, jobject target, jmethodID methodID, int arg)
+{
+    env->CallVoidMethod(target, methodID, arg);
+}
+
+static void android_animation_PropertyValuesHolder_callFloatMethod(
+        JNIEnv* env, jclass pvhObject, jobject target, jmethodID methodID, float arg)
+{
+    env->CallVoidMethod(target, methodID, arg);
+}
+
+static JNINativeMethod gMethods[] = {
+    {   "nGetIntMethod", "(Ljava/lang/Class;Ljava/lang/String;)I",
+            (void*)android_animation_PropertyValuesHolder_getIntMethod },
+    {   "nGetFloatMethod", "(Ljava/lang/Class;Ljava/lang/String;)I",
+            (void*)android_animation_PropertyValuesHolder_getFloatMethod },
+    {   "nCallIntMethod", "(Ljava/lang/Object;II)V",
+            (void*)android_animation_PropertyValuesHolder_callIntMethod },
+    {   "nCallFloatMethod", "(Ljava/lang/Object;IF)V",
+            (void*)android_animation_PropertyValuesHolder_callFloatMethod }
+};
+
+int register_android_animation_PropertyValuesHolder(JNIEnv* env)
+{
+    return AndroidRuntime::registerNativeMethods(env,
+            kClassPathName, gMethods, NELEM(gMethods));
+}
+
+};