1 /*
2  * Copyright (C) 2013 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.camera.data;
18 
19 import android.content.Context;
20 import android.net.Uri;
21 import android.os.AsyncTask;
22 
23 import com.android.camera.util.Callback;
24 
25 import java.util.List;
26 
27 /**
28  * An abstract {@link LocalFilmstripDataAdapter} implementation to wrap another
29  * {@link LocalFilmstripDataAdapter}. All implementations related to data id is not
30  * addressed in this abstract class since wrapping another data adapter
31  * surely makes things different for data id.
32  *
33  * @see FixedFirstProxyAdapter
34  * @see FixedLastProxyAdapter
35  */
36 public abstract class FilmstripDataAdapterProxy implements
37       LocalFilmstripDataAdapter {
38 
39     protected final Context mContext;
40     protected final LocalFilmstripDataAdapter mAdapter;
41     protected int mSuggestedWidth;
42     protected int mSuggestedHeight;
43 
44     /**
45      * Constructor.
46      *
47      * @param context A valid Android context.
48      * @param wrappedAdapter The {@link LocalFilmstripDataAdapter} to be wrapped.
49      */
FilmstripDataAdapterProxy(Context context, LocalFilmstripDataAdapter wrappedAdapter)50     FilmstripDataAdapterProxy(Context context,
51           LocalFilmstripDataAdapter wrappedAdapter) {
52         if (wrappedAdapter == null) {
53             throw new AssertionError("data adapter is null");
54         }
55         mContext = context;
56         mAdapter = wrappedAdapter;
57     }
58 
59     @Override
suggestViewSizeBound(int w, int h)60     public void suggestViewSizeBound(int w, int h) {
61         mSuggestedWidth = w;
62         mSuggestedHeight = h;
63         mAdapter.suggestViewSizeBound(w, h);
64     }
65 
66     @Override
setListener(Listener listener)67     public void setListener(Listener listener) {
68         mAdapter.setListener(listener);
69     }
70 
71     @Override
setLocalDataListener(FilmstripItemListener listener)72     public void setLocalDataListener(FilmstripItemListener listener) {
73         mAdapter.setLocalDataListener(listener);
74     }
75 
76     @Override
requestLoad(Callback<Void> onDone)77     public void requestLoad(Callback<Void> onDone) {
78         mAdapter.requestLoad(onDone);
79     }
80 
81     @Override
requestLoadNewPhotos()82     public void requestLoadNewPhotos() {
83         mAdapter.requestLoadNewPhotos();
84     }
85 
86     @Override
addOrUpdate(FilmstripItem item)87     public boolean addOrUpdate(FilmstripItem item) {
88         return mAdapter.addOrUpdate(item);
89     }
90 
91     @Override
clear()92     public void clear() {
93         mAdapter.clear();
94     }
95 
96     @Override
executeDeletion()97     public boolean executeDeletion() {
98         return mAdapter.executeDeletion();
99     }
100 
101     @Override
undoDeletion()102     public boolean undoDeletion() {
103         return mAdapter.undoDeletion();
104     }
105 
106     @Override
refresh(Uri uri)107     public void refresh(Uri uri) {
108         mAdapter.refresh(uri);
109     }
110 
111     @Override
updateMetadataAt(int index)112     public AsyncTask updateMetadataAt(int index) {
113         return mAdapter.updateMetadataAt(index);
114     }
115 
116     @Override
isMetadataUpdatedAt(int index)117     public boolean isMetadataUpdatedAt(int index) {
118         return mAdapter.isMetadataUpdatedAt(index);
119     }
120 
121     @Override
preloadItems(List<Integer> items)122     public List<AsyncTask> preloadItems(List<Integer> items) {
123         return mAdapter.preloadItems(items);
124     }
125 
126     @Override
cancelItems(List<AsyncTask> loadTokens)127     public void cancelItems(List<AsyncTask> loadTokens) {
128         mAdapter.cancelItems(loadTokens);
129     }
130 
131     @Override
getItemsInRange(int startPosition, int endPosition)132     public List<Integer> getItemsInRange(int startPosition, int endPosition) {
133         return mAdapter.getItemsInRange(startPosition, endPosition);
134     }
135 
136     @Override
getCount()137     public int getCount() {
138         return mAdapter.getCount();
139     }
140 }
141