| /* |
| * Copyright (C) 2008 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 com.android.tools.layoutlib.create; |
| |
| import java.util.HashMap; |
| |
| /** |
| * Allows stub methods from LayoutLib to be overriden at runtime. |
| * <p/> |
| * Implementation note: all types required by this class(inner/outer classes & interfaces) |
| * must be referenced by the injectClass argument to {@link AsmGenerator} in Main.java; |
| * Otherwise they won't be accessible in layoutlib.jar at runtime. |
| */ |
| public final class OverrideMethod { |
| |
| /** Map of method overridden. */ |
| private static HashMap<String, MethodListener> sMethods = new HashMap<String, MethodListener>(); |
| /** Default listener for all method not listed in sMethods. Nothing if null. */ |
| private static MethodListener sDefaultListener = null; |
| |
| /** |
| * Sets the default listener for all methods not specifically handled. |
| * Null means to do nothing. |
| */ |
| @SuppressWarnings("UnusedDeclaration") // Used by Bridge by reflection for debug purposes. |
| public static void setDefaultListener(MethodListener listener) { |
| sDefaultListener = listener; |
| } |
| |
| /** |
| * Defines or reset a listener for the given method signature. |
| * |
| * @param signature The signature of the method being invoked, composed of the |
| * binary class name followed by the method descriptor (aka argument |
| * types). Example: "com/foo/MyClass/InnerClass/printInt(I)V" |
| * @param listener The new listener. Removes it if null. |
| */ |
| public static void setMethodListener(String signature, MethodListener listener) { |
| if (listener == null) { |
| sMethods.remove(signature); |
| } else { |
| sMethods.put(signature, listener); |
| } |
| } |
| |
| /** |
| * Invokes the specific listener for the given signature or the default one if defined. |
| * <p/> |
| * This version invokes the method listener for the void return type. |
| * <p/> |
| * Note: this is not intended to be used by the LayoutLib Bridge. It is intended to be called |
| * by the stubbed methods generated by the LayoutLib_create tool. |
| * |
| * @param signature The signature of the method being invoked, composed of the |
| * binary class name followed by the method descriptor (aka argument |
| * types). Example: "com/foo/MyClass/InnerClass/printInt(I)V". |
| * @param isNative True if the method was a native method. |
| * @param caller The calling object. Null for static methods, "this" for instance methods. |
| */ |
| public static void invokeV(String signature, boolean isNative, Object caller) { |
| MethodListener i = sMethods.get(signature); |
| if (i != null) { |
| i.onInvokeV(signature, isNative, caller); |
| } else if (sDefaultListener != null) { |
| sDefaultListener.onInvokeV(signature, isNative, caller); |
| } |
| } |
| |
| /** |
| * Invokes the specific listener for the int return type. |
| * @see #invokeV(String, boolean, Object) |
| */ |
| public static int invokeI(String signature, boolean isNative, Object caller) { |
| MethodListener i = sMethods.get(signature); |
| if (i != null) { |
| return i.onInvokeI(signature, isNative, caller); |
| } else if (sDefaultListener != null) { |
| return sDefaultListener.onInvokeI(signature, isNative, caller); |
| } |
| return 0; |
| } |
| |
| /** |
| * Invokes the specific listener for the long return type. |
| * @see #invokeV(String, boolean, Object) |
| */ |
| public static long invokeL(String signature, boolean isNative, Object caller) { |
| MethodListener i = sMethods.get(signature); |
| if (i != null) { |
| return i.onInvokeL(signature, isNative, caller); |
| } else if (sDefaultListener != null) { |
| return sDefaultListener.onInvokeL(signature, isNative, caller); |
| } |
| return 0; |
| } |
| |
| /** |
| * Invokes the specific listener for the float return type. |
| * @see #invokeV(String, boolean, Object) |
| */ |
| public static float invokeF(String signature, boolean isNative, Object caller) { |
| MethodListener i = sMethods.get(signature); |
| if (i != null) { |
| return i.onInvokeF(signature, isNative, caller); |
| } else if (sDefaultListener != null) { |
| return sDefaultListener.onInvokeF(signature, isNative, caller); |
| } |
| return 0; |
| } |
| |
| /** |
| * Invokes the specific listener for the double return type. |
| * @see #invokeV(String, boolean, Object) |
| */ |
| public static double invokeD(String signature, boolean isNative, Object caller) { |
| MethodListener i = sMethods.get(signature); |
| if (i != null) { |
| return i.onInvokeD(signature, isNative, caller); |
| } else if (sDefaultListener != null) { |
| return sDefaultListener.onInvokeD(signature, isNative, caller); |
| } |
| return 0; |
| } |
| |
| /** |
| * Invokes the specific listener for the object return type. |
| * @see #invokeV(String, boolean, Object) |
| */ |
| public static Object invokeA(String signature, boolean isNative, Object caller) { |
| MethodListener i = sMethods.get(signature); |
| if (i != null) { |
| return i.onInvokeA(signature, isNative, caller); |
| } else if (sDefaultListener != null) { |
| return sDefaultListener.onInvokeA(signature, isNative, caller); |
| } |
| return null; |
| } |
| } |