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/*
This file is part of Subsonic.
Subsonic is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Subsonic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Subsonic. If not, see <http://www.gnu.org/licenses/>.
Copyright 2010 (C) Sindre Mehus
*/
package net.sourceforge.subsonic.androidapp.util;
import net.sourceforge.subsonic.androidapp.domain.Artist;
import net.sourceforge.subsonic.androidapp.R;
import android.widget.ArrayAdapter;
import android.widget.SectionIndexer;
import android.content.Context;
import java.util.List;
import java.util.Set;
import java.util.LinkedHashSet;
import java.util.ArrayList;
/**
* @author Sindre Mehus
*/
public class ArtistAdapter extends ArrayAdapter<Artist> implements SectionIndexer {
// Both arrays are indexed by section ID.
private final Object[] sections;
private final Integer[] positions;
public ArtistAdapter(Context context, List<Artist> artists) {
super(context, R.layout.artist_list_item, artists);
Set<String> sectionSet = new LinkedHashSet<String>(30);
List<Integer> positionList = new ArrayList<Integer>(30);
for (int i = 0; i < artists.size(); i++) {
Artist artist = artists.get(i);
String index = artist.getIndex();
if (!sectionSet.contains(index)) {
sectionSet.add(index);
positionList.add(i);
}
}
sections = sectionSet.toArray(new Object[sectionSet.size()]);
positions = positionList.toArray(new Integer[positionList.size()]);
}
@Override
public Object[] getSections() {
return sections;
}
@Override
public int getPositionForSection(int section) {
section = Math.min(section, positions.length - 1);
return positions[section];
}
@Override
public int getSectionForPosition(int pos) {
for (int i = 0; i < sections.length - 1; i++) {
if (pos < positions[i + 1]) {
return i;
}
}
return sections.length - 1;
}
}
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