ClassPresenterSelector.java revision 13d1515a1edd63f26ad7f3c9c7471d0969900190 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5 * in compliance with the License. You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software distributed under the License
10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11 * or implied. See the License for the specific language governing permissions and limitations under
12 * the License.
13 */
14package android.support.v17.leanback.widget;
15
16import android.util.Log;
17import android.view.View;
18import android.view.ViewGroup;
19
20import java.util.HashMap;
21
22/**
23 * A ClassPresenterSelector selects a {@link Presenter} based on the item's
24 * Java class.
25 */
26public class ClassPresenterSelector extends PresenterSelector {
27
28    private final HashMap<Class<?>, Presenter> mClassMap = new HashMap<Class<?>, Presenter>();
29
30    public void addClassPresenter(Class<?> cls, Presenter presenter) {
31        mClassMap.put(cls, presenter);
32    }
33
34    @Override
35    public Presenter getPresenter(Object item) {
36        Class<?> cls = item.getClass();
37        Presenter presenter = null;
38
39        do {
40            presenter = mClassMap.get(cls);
41            cls = cls.getSuperclass();
42        } while (presenter == null && cls != null);
43
44        return presenter;
45    }
46}
47