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
17package 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 */
26public 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
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
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
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
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
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
92    public Object onInvokeA(String signature, boolean isNative, Object caller) {
93        onInvokeV(signature, isNative, caller);
94        return null;
95    }
96}
97
98