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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.gallery3d.data;
import com.android.gallery3d.R;
import android.content.Context;
import android.content.res.Resources;
import java.util.ArrayList;
public class SizeClustering extends Clustering {
private static final String TAG = "SizeClustering";
private Context mContext;
private ArrayList<Path>[] mClusters;
private String[] mNames;
private long mMinSizes[];
private static final long MEGA_BYTES = 1024L*1024;
private static final long GIGA_BYTES = 1024L*1024*1024;
private static final long[] SIZE_LEVELS = {
0,
1 * MEGA_BYTES,
10 * MEGA_BYTES,
100 * MEGA_BYTES,
1 * GIGA_BYTES,
2 * GIGA_BYTES,
4 * GIGA_BYTES,
};
public SizeClustering(Context context) {
mContext = context;
}
@Override
public void run(MediaSet baseSet) {
final ArrayList<Path>[] group =
(ArrayList<Path>[]) new ArrayList[SIZE_LEVELS.length];
baseSet.enumerateTotalMediaItems(new MediaSet.ItemConsumer() {
public void consume(int index, MediaItem item) {
// Find the cluster this item belongs to.
long size = item.getSize();
int i;
for (i = 0; i < SIZE_LEVELS.length - 1; i++) {
if (size < SIZE_LEVELS[i + 1]) {
break;
}
}
ArrayList<Path> list = group[i];
if (list == null) {
list = new ArrayList<Path>();
group[i] = list;
}
list.add(item.getPath());
}
});
int count = 0;
for (int i = 0; i < group.length; i++) {
if (group[i] != null) {
count++;
}
}
mClusters = (ArrayList<Path>[]) new ArrayList[count];
mNames = new String[count];
mMinSizes = new long[count];
Resources res = mContext.getResources();
int k = 0;
// Go through group in the reverse order, so the group with the largest
// size will show first.
for (int i = group.length - 1; i >= 0; i--) {
if (group[i] == null) continue;
mClusters[k] = group[i];
if (i == 0) {
mNames[k] = String.format(
res.getString(R.string.size_below), getSizeString(i + 1));
} else if (i == group.length - 1) {
mNames[k] = String.format(
res.getString(R.string.size_above), getSizeString(i));
} else {
String minSize = getSizeString(i);
String maxSize = getSizeString(i + 1);
mNames[k] = String.format(
res.getString(R.string.size_between), minSize, maxSize);
}
mMinSizes[k] = SIZE_LEVELS[i];
k++;
}
}
private String getSizeString(int index) {
long bytes = SIZE_LEVELS[index];
if (bytes >= GIGA_BYTES) {
return (bytes / GIGA_BYTES) + "GB";
} else {
return (bytes / MEGA_BYTES) + "MB";
}
}
@Override
public int getNumberOfClusters() {
return mClusters.length;
}
@Override
public ArrayList<Path> getCluster(int index) {
return mClusters[index];
}
@Override
public String getClusterName(int index) {
return mNames[index];
}
public long getMinSize(int index) {
return mMinSizes[index];
}
}
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