| /* |
| * 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. |
| */ |
| |
| package android.animation; |
| |
| import com.android.layoutlib.bridge.Bridge; |
| import com.android.layoutlib.bridge.impl.DelegateManager; |
| import com.android.tools.layoutlib.annotations.LayoutlibDelegate; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * Delegate implementing the native methods of android.animation.PropertyValuesHolder |
| * |
| * Through the layoutlib_create tool, the original native methods of PropertyValuesHolder have been |
| * replaced by calls to methods of the same name in this delegate class. |
| * |
| * Because it's a stateless class to start with, there's no need to keep a {@link DelegateManager} |
| * around to map int to instance of the delegate. |
| * |
| * The main goal of this class' methods are to provide a native way to access setters and getters |
| * on some object. We override these methods to use reflection since the original reflection |
| * implementation of the PropertyValuesHolder won't be able to access protected methods. |
| * |
| */ |
| /*package*/ |
| @SuppressWarnings("unused") |
| class PropertyValuesHolder_Delegate { |
| // This code is copied from android.animation.PropertyValuesHolder and must be kept in sync |
| // We try several different types when searching for appropriate setter/getter functions. |
| // The caller may have supplied values in a type that does not match the setter/getter |
| // functions (such as the integers 0 and 1 to represent floating point values for alpha). |
| // Also, the use of generics in constructors means that we end up with the Object versions |
| // of primitive types (Float vs. float). But most likely, the setter/getter functions |
| // will take primitive types instead. |
| // So we supply an ordered array of other types to try before giving up. |
| private static Class[] FLOAT_VARIANTS = {float.class, Float.class, double.class, int.class, |
| Double.class, Integer.class}; |
| private static Class[] INTEGER_VARIANTS = {int.class, Integer.class, float.class, double.class, |
| Float.class, Double.class}; |
| |
| private static final Object sMethodIndexLock = new Object(); |
| private static final Map<Long, Method> ID_TO_METHOD = new HashMap<Long, Method>(); |
| private static final Map<String, Long> METHOD_NAME_TO_ID = new HashMap<String, Long>(); |
| private static long sNextId = 1; |
| |
| private static long registerMethod(Class<?> targetClass, String methodName, Class[] types, |
| int nArgs) { |
| // Encode the number of arguments in the method name |
| String methodIndexName = String.format("%1$s.%2$s#%3$d", targetClass.getSimpleName(), |
| methodName, nArgs); |
| synchronized (sMethodIndexLock) { |
| Long methodId = METHOD_NAME_TO_ID.get(methodIndexName); |
| |
| if (methodId != null) { |
| // The method was already registered |
| return methodId; |
| } |
| |
| Class[] args = new Class[nArgs]; |
| Method method = null; |
| for (Class typeVariant : types) { |
| for (int i = 0; i < nArgs; i++) { |
| args[i] = typeVariant; |
| } |
| try { |
| method = targetClass.getDeclaredMethod(methodName, args); |
| } catch (NoSuchMethodException ignore) { |
| } |
| } |
| |
| if (method != null) { |
| methodId = sNextId++; |
| ID_TO_METHOD.put(methodId, method); |
| METHOD_NAME_TO_ID.put(methodIndexName, methodId); |
| |
| return methodId; |
| } |
| } |
| |
| // Method not found |
| return 0; |
| } |
| |
| private static void callMethod(Object target, long methodID, Object... args) { |
| Method method = ID_TO_METHOD.get(methodID); |
| assert method != null; |
| |
| try { |
| method.setAccessible(true); |
| method.invoke(target, args); |
| } catch (IllegalAccessException e) { |
| Bridge.getLog().error(null, "Unable to update property during animation", e, null); |
| } catch (InvocationTargetException e) { |
| Bridge.getLog().error(null, "Unable to update property during animation", e, null); |
| } |
| } |
| |
| @LayoutlibDelegate |
| /*package*/ static long nGetIntMethod(Class<?> targetClass, String methodName) { |
| return nGetMultipleIntMethod(targetClass, methodName, 1); |
| } |
| |
| @LayoutlibDelegate |
| /*package*/ static long nGetFloatMethod(Class<?> targetClass, String methodName) { |
| return nGetMultipleFloatMethod(targetClass, methodName, 1); |
| } |
| |
| @LayoutlibDelegate |
| /*package*/ static long nGetMultipleIntMethod(Class<?> targetClass, String methodName, |
| int numParams) { |
| return registerMethod(targetClass, methodName, INTEGER_VARIANTS, numParams); |
| } |
| |
| @LayoutlibDelegate |
| /*package*/ static long nGetMultipleFloatMethod(Class<?> targetClass, String methodName, |
| int numParams) { |
| return registerMethod(targetClass, methodName, FLOAT_VARIANTS, numParams); |
| } |
| |
| @LayoutlibDelegate |
| /*package*/ static void nCallIntMethod(Object target, long methodID, int arg) { |
| callMethod(target, methodID, arg); |
| } |
| |
| @LayoutlibDelegate |
| /*package*/ static void nCallFloatMethod(Object target, long methodID, float arg) { |
| callMethod(target, methodID, arg); |
| } |
| |
| @LayoutlibDelegate |
| /*package*/ static void nCallTwoIntMethod(Object target, long methodID, int arg1, |
| int arg2) { |
| callMethod(target, methodID, arg1, arg2); |
| } |
| |
| @LayoutlibDelegate |
| /*package*/ static void nCallFourIntMethod(Object target, long methodID, int arg1, |
| int arg2, int arg3, int arg4) { |
| callMethod(target, methodID, arg1, arg2, arg3, arg4); |
| } |
| |
| @LayoutlibDelegate |
| /*package*/ static void nCallMultipleIntMethod(Object target, long methodID, |
| int[] args) { |
| assert args != null; |
| |
| // Box parameters |
| Object[] params = new Object[args.length]; |
| for (int i = 0; i < args.length; i++) { |
| params[i] = args; |
| } |
| callMethod(target, methodID, params); |
| } |
| |
| @LayoutlibDelegate |
| /*package*/ static void nCallTwoFloatMethod(Object target, long methodID, float arg1, |
| float arg2) { |
| callMethod(target, methodID, arg1, arg2); |
| } |
| |
| @LayoutlibDelegate |
| /*package*/ static void nCallFourFloatMethod(Object target, long methodID, float arg1, |
| float arg2, float arg3, float arg4) { |
| callMethod(target, methodID, arg1, arg2, arg3, arg4); |
| } |
| |
| @LayoutlibDelegate |
| /*package*/ static void nCallMultipleFloatMethod(Object target, long methodID, |
| float[] args) { |
| assert args != null; |
| |
| // Box parameters |
| Object[] params = new Object[args.length]; |
| for (int i = 0; i < args.length; i++) { |
| params[i] = args; |
| } |
| callMethod(target, methodID, params); |
| } |
| } |