1/*
2 * Copyright (C) 2010 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 android.graphics;
18
19import com.android.layoutlib.bridge.impl.DelegateManager;
20import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
21
22/**
23 * Delegate implementing the native methods of android.graphics.DrawFilter
24 *
25 * Through the layoutlib_create tool, the original native methods of DrawFilter have been replaced
26 * by calls to methods of the same name in this delegate class.
27 *
28 * This class behaves like the original native implementation, but in Java, keeping previously
29 * native data into its own objects and mapping them to int that are sent back and forth between
30 * it and the original DrawFilter class.
31 *
32 * This also serve as a base class for all DrawFilter delegate classes.
33 *
34 * @see DelegateManager
35 *
36 */
37public abstract class DrawFilter_Delegate {
38
39    // ---- delegate manager ----
40    protected static final DelegateManager<DrawFilter_Delegate> sManager =
41            new DelegateManager<DrawFilter_Delegate>(DrawFilter_Delegate.class);
42
43    // ---- delegate helper data ----
44
45    // ---- delegate data ----
46
47    // ---- Public Helper methods ----
48
49    public static DrawFilter_Delegate getDelegate(long nativeDrawFilter) {
50        return sManager.getDelegate(nativeDrawFilter);
51    }
52
53    public abstract boolean isSupported();
54    public abstract String getSupportMessage();
55
56    // ---- native methods ----
57
58    @LayoutlibDelegate
59    /*package*/ static void nativeDestructor(long nativeDrawFilter) {
60        sManager.removeJavaReferenceFor(nativeDrawFilter);
61    }
62
63    // ---- Private delegate/helper methods ----
64}
65