1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.tools.layoutlib.create; 18 19 20 /** 21 * An adapter to make it easier to use {@link MethodListener}. 22 * <p/> 23 * The adapter calls the void {@link #onInvokeV(String, boolean, Object)} listener 24 * for all types (I, L, F, D and A), returning 0 or null as appropriate. 25 */ 26 public class MethodAdapter implements MethodListener { 27 /** 28 * A stub method is being invoked. 29 * <p/> 30 * Known limitation: caller arguments are not available. 31 * 32 * @param signature The signature of the method being invoked, composed of the 33 * binary class name followed by the method descriptor (aka argument 34 * types). Example: "com/foo/MyClass/InnerClass/printInt(I)V". 35 * @param isNative True if the method was a native method. 36 * @param caller The calling object. Null for static methods, "this" for instance methods. 37 */ 38 @Override onInvokeV(String signature, boolean isNative, Object caller)39 public void onInvokeV(String signature, boolean isNative, Object caller) { 40 } 41 42 /** 43 * Same as {@link #onInvokeV(String, boolean, Object)} but returns an integer or similar. 44 * @see #onInvokeV(String, boolean, Object) 45 * @return an integer, or a boolean, or a short or a byte. 46 */ 47 @Override onInvokeI(String signature, boolean isNative, Object caller)48 public int onInvokeI(String signature, boolean isNative, Object caller) { 49 onInvokeV(signature, isNative, caller); 50 return 0; 51 } 52 53 /** 54 * Same as {@link #onInvokeV(String, boolean, Object)} but returns a long. 55 * @see #onInvokeV(String, boolean, Object) 56 * @return a long. 57 */ 58 @Override onInvokeL(String signature, boolean isNative, Object caller)59 public long onInvokeL(String signature, boolean isNative, Object caller) { 60 onInvokeV(signature, isNative, caller); 61 return 0; 62 } 63 64 /** 65 * Same as {@link #onInvokeV(String, boolean, Object)} but returns a float. 66 * @see #onInvokeV(String, boolean, Object) 67 * @return a float. 68 */ 69 @Override onInvokeF(String signature, boolean isNative, Object caller)70 public float onInvokeF(String signature, boolean isNative, Object caller) { 71 onInvokeV(signature, isNative, caller); 72 return 0; 73 } 74 75 /** 76 * Same as {@link #onInvokeV(String, boolean, Object)} but returns a double. 77 * @see #onInvokeV(String, boolean, Object) 78 * @return a double. 79 */ 80 @Override onInvokeD(String signature, boolean isNative, Object caller)81 public double onInvokeD(String signature, boolean isNative, Object caller) { 82 onInvokeV(signature, isNative, caller); 83 return 0; 84 } 85 86 /** 87 * Same as {@link #onInvokeV(String, boolean, Object)} but returns an object. 88 * @see #onInvokeV(String, boolean, Object) 89 * @return an object. 90 */ 91 @Override onInvokeA(String signature, boolean isNative, Object caller)92 public Object onInvokeA(String signature, boolean isNative, Object caller) { 93 onInvokeV(signature, isNative, caller); 94 return null; 95 } 96 } 97 98