FilterEmptyPromptSet.java

/*
 * Copyright (C) 2012 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.fastergallery.data;

import java.util.ArrayList;

public class FilterEmptyPromptSet extends MediaSet implements ContentListener {
	@SuppressWarnings("unused")
	private static final String TAG = "FilterEmptyPromptSet";

	private ArrayList<MediaItem> mEmptyItem;
	private MediaSet mBaseSet;

	public FilterEmptyPromptSet(Path path, MediaSet baseSet, MediaItem emptyItem) {
		super(path, INVALID_DATA_VERSION);
		mEmptyItem = new ArrayList<MediaItem>(1);
		mEmptyItem.add(emptyItem);
		mBaseSet = baseSet;
		mBaseSet.addContentListener(this);
	}

	@Override
	public int getMediaItemCount() {
		int itemCount = mBaseSet.getMediaItemCount();
		if (itemCount > 0) {
			return itemCount;
		} else {
			return 1;
		}
	}

	@Override
	public ArrayList<MediaItem> getMediaItem(int start, int count) {
		int itemCount = mBaseSet.getMediaItemCount();
		if (itemCount > 0) {
			return mBaseSet.getMediaItem(start, count);
		} else if (start == 0 && count == 1) {
			return mEmptyItem;
		} else {
			throw new ArrayIndexOutOfBoundsException();
		}
	}

	@Override
	public void onContentDirty() {
		notifyContentChanged();
	}

	@Override
	public boolean isLeafAlbum() {
		return true;
	}

	@Override
	public boolean isCameraRoll() {
		return mBaseSet.isCameraRoll();
	}

	@Override
	public long reload() {
		return mBaseSet.reload();
	}

	@Override
	public String getName() {
		return mBaseSet.getName();
	}
}