Home | History | Annotate | Download | only in data 
      1 /*
      2  * Copyright (C) 2011 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.gallery3d.data;
     18 
     19 import com.android.gallery3d.R;
     20 
     21 import android.content.Context;
     22 
     23 import java.util.ArrayList;
     24 import java.util.Map;
     25 import java.util.TreeMap;
     26 
     27 public class FaceClustering extends Clustering {
     28     @SuppressWarnings("unused")
     29     private static final String TAG = "FaceClustering";
     30 
     31     private ArrayList<ArrayList<Path>> mClusters;
     32     private String[] mNames;
     33     private String mUntaggedString;
     34 
     35     public FaceClustering(Context context) {
     36         mUntaggedString = context.getResources().getString(R.string.untagged);
     37     }
     38 
     39     @Override
     40     public void run(MediaSet baseSet) {
     41         final TreeMap<Face, ArrayList<Path>> map =
     42                 new TreeMap<Face, ArrayList<Path>>();
     43         final ArrayList<Path> untagged = new ArrayList<Path>();
     44 
     45         baseSet.enumerateTotalMediaItems(new MediaSet.ItemConsumer() {
     46             public void consume(int index, MediaItem item) {
     47                 Path path = item.getPath();
     48 
     49                 Face[] faces = item.getFaces();
     50                 if (faces == null || faces.length == 0) {
     51                     untagged.add(path);
     52                     return;
     53                 }
     54                 for (int j = 0; j < faces.length; j++) {
     55                     Face key = faces[j];
     56                     ArrayList<Path> list = map.get(key);
     57                     if (list == null) {
     58                         list = new ArrayList<Path>();
     59                         map.put(key, list);
     60                     }
     61                     list.add(path);
     62                 }
     63             }
     64         });
     65 
     66         int m = map.size();
     67         mClusters = new ArrayList<ArrayList<Path>>();
     68         mNames = new String[m + ((untagged.size() > 0) ? 1 : 0)];
     69         int i = 0;
     70         for (Map.Entry<Face, ArrayList<Path>> entry : map.entrySet()) {
     71             mNames[i++] = entry.getKey().getName();
     72             mClusters.add(entry.getValue());
     73         }
     74         if (untagged.size() > 0) {
     75             mNames[i++] = mUntaggedString;
     76             mClusters.add(untagged);
     77         }
     78     }
     79 
     80     @Override
     81     public int getNumberOfClusters() {
     82         return mClusters.size();
     83     }
     84 
     85     @Override
     86     public ArrayList<Path> getCluster(int index) {
     87         return mClusters.get(index);
     88     }
     89 
     90     @Override
     91     public String getClusterName(int index) {
     92         return mNames[index];
     93     }
     94 }
     95