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      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 LocalDataAdapter} implementation to wrap another
     29  * {@link LocalDataAdapter}. 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 FixedFirstDataAdapter
     34  * @see FixedLastDataAdapter
     35  */
     36 public abstract class AbstractLocalDataAdapterWrapper implements LocalDataAdapter {
     37 
     38     protected final Context mContext;
     39     protected final LocalDataAdapter mAdapter;
     40     protected int mSuggestedWidth;
     41     protected int mSuggestedHeight;
     42 
     43     /**
     44      * Constructor.
     45      *
     46      * @param context A valid Android context.
     47      * @param wrappedAdapter The {@link LocalDataAdapter} to be wrapped.
     48      */
     49     AbstractLocalDataAdapterWrapper(Context context, LocalDataAdapter wrappedAdapter) {
     50         if (wrappedAdapter == null) {
     51             throw new AssertionError("data adapter is null");
     52         }
     53         mContext = context;
     54         mAdapter = wrappedAdapter;
     55     }
     56 
     57     @Override
     58     public void suggestViewSizeBound(int w, int h) {
     59         mSuggestedWidth = w;
     60         mSuggestedHeight = h;
     61         mAdapter.suggestViewSizeBound(w, h);
     62     }
     63 
     64     @Override
     65     public void setListener(Listener listener) {
     66         mAdapter.setListener(listener);
     67     }
     68 
     69     @Override
     70     public void setLocalDataListener(LocalDataListener listener) {
     71         mAdapter.setLocalDataListener(listener);
     72     }
     73 
     74     @Override
     75     public void requestLoad(Callback<Void> doneCallback) {
     76         mAdapter.requestLoad(doneCallback);
     77     }
     78 
     79     @Override
     80     public void requestLoadNewPhotos() {
     81         mAdapter.requestLoadNewPhotos();
     82     }
     83 
     84     @Override
     85     public boolean addData(LocalData data) {
     86         return mAdapter.addData(data);
     87     }
     88 
     89     @Override
     90     public void flush() {
     91         mAdapter.flush();
     92     }
     93 
     94     @Override
     95     public boolean executeDeletion() {
     96         return mAdapter.executeDeletion();
     97     }
     98 
     99     @Override
    100     public boolean undoDataRemoval() {
    101         return mAdapter.undoDataRemoval();
    102     }
    103 
    104     @Override
    105     public void refresh(Uri uri) {
    106         mAdapter.refresh(uri);
    107     }
    108 
    109     @Override
    110     public AsyncTask updateMetadata(int dataId) {
    111         return mAdapter.updateMetadata(dataId);
    112     }
    113 
    114     @Override
    115     public boolean isMetadataUpdated(int dataId) {
    116         return mAdapter.isMetadataUpdated(dataId);
    117     }
    118 
    119     @Override
    120     public List<AsyncTask> preloadItems(List<Integer> items) {
    121         return mAdapter.preloadItems(items);
    122     }
    123 
    124     @Override
    125     public void cancelItems(List<AsyncTask> loadTokens) {
    126         mAdapter.cancelItems(loadTokens);
    127     }
    128 
    129     @Override
    130     public List<Integer> getItemsInRange(int startPosition, int endPosition) {
    131         return mAdapter.getItemsInRange(startPosition, endPosition);
    132     }
    133 
    134     @Override
    135     public int getCount() {
    136         return mAdapter.getCount();
    137     }
    138 }
    139