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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 
17 package android.graphics;
18 
19 import com.android.layoutlib.bridge.impl.DelegateManager;
20 import 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  */
37 public 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 
getDelegate(int nativeDrawFilter)49     public static DrawFilter_Delegate getDelegate(int nativeDrawFilter) {
50         return sManager.getDelegate(nativeDrawFilter);
51     }
52 
isSupported()53     public abstract boolean isSupported();
getSupportMessage()54     public abstract String getSupportMessage();
55 
56     // ---- native methods ----
57 
58     @LayoutlibDelegate
nativeDestructor(int nativeDrawFilter)59     /*package*/ static void nativeDestructor(int nativeDrawFilter) {
60         sManager.removeJavaReferenceFor(nativeDrawFilter);
61     }
62 
63     // ---- Private delegate/helper methods ----
64 }
65