mirror of
https://codeberg.org/OpenTracksApp/OpenTracks.git
synced 2026-10-02 17:43:06 +02:00
Rebranding to OpenTracks (code).
This commit is contained in:
Dennis Guse
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/*
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* Copyright 2011 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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package de.dennisguse.opentracks.content;
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import android.content.SharedPreferences;
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import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
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import android.database.ContentObserver;
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import android.os.Handler;
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import android.util.Log;
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import java.util.EnumSet;
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import java.util.Set;
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/**
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* Data source manager. Creates observers/listeners and manages their
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* registration with {@link DataSource}. The observers/listeners calls
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* {@link DataSourceListener} when data changes.
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*
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* @author Rodrigo Damazio
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*/
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public class DataSourceManager {
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private static final String TAG = DataSourceManager.class.getSimpleName();
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private final DataSource dataSource;
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private final DataSourceListener dataSourceListener;
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// Registered listeners
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private final Set<TrackDataType> registeredListeners = EnumSet.noneOf(TrackDataType.class);
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private final Handler handler;
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private final TracksTableObserver tracksTableObserver;
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private final WaypointsTableObserver waypointsTableObserver;
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private final TrackPointsTableObserver trackPointsTableObserver;
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private final PreferenceListener preferenceListener;
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public DataSourceManager(DataSource dataSource, DataSourceListener dataSourceListener) {
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this.dataSource = dataSource;
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this.dataSourceListener = dataSourceListener;
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handler = new Handler();
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tracksTableObserver = new TracksTableObserver();
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waypointsTableObserver = new WaypointsTableObserver();
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trackPointsTableObserver = new TrackPointsTableObserver();
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preferenceListener = new PreferenceListener();
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}
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/**
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* Updates listeners with data source.
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*
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* @param listeners the listeners
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*/
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public void updateListeners(EnumSet<TrackDataType> listeners) {
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EnumSet<TrackDataType> neededListeners = EnumSet.copyOf(listeners);
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/*
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* Map SAMPLED_OUT_POINT_UPDATES to POINT_UPDATES since they correspond to
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* the same internal listener
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*/
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if (neededListeners.contains(TrackDataType.SAMPLED_OUT_TRACK_POINTS_TABLE)) {
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neededListeners.remove(TrackDataType.SAMPLED_OUT_TRACK_POINTS_TABLE);
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neededListeners.add(TrackDataType.SAMPLED_IN_TRACK_POINTS_TABLE);
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}
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Log.d(TAG, "Updating listeners " + neededListeners);
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// Unnecessary = registered - needed
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Set<TrackDataType> unnecessaryListeners = EnumSet.copyOf(registeredListeners);
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unnecessaryListeners.removeAll(neededListeners);
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// Missing = needed - registered
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Set<TrackDataType> missingListeners = EnumSet.copyOf(neededListeners);
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missingListeners.removeAll(registeredListeners);
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// Remove unnecessary listeners
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for (TrackDataType trackDataType : unnecessaryListeners) {
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unregisterListener(trackDataType);
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}
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// Add missing listeners
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for (TrackDataType trackDataType : missingListeners) {
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registerListener(trackDataType);
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}
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// Update registered listeners
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registeredListeners.clear();
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registeredListeners.addAll(neededListeners);
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}
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/**
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* Registers a listener with data source.
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*
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* @param trackDataType the listener data type
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*/
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private void registerListener(TrackDataType trackDataType) {
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switch (trackDataType) {
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case TRACKS_TABLE:
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dataSource.registerContentObserver(TracksColumns.CONTENT_URI, tracksTableObserver);
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break;
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case WAYPOINTS_TABLE:
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dataSource.registerContentObserver(WaypointsColumns.CONTENT_URI, waypointsTableObserver);
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break;
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case SAMPLED_IN_TRACK_POINTS_TABLE:
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dataSource.registerContentObserver(
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TrackPointsColumns.CONTENT_URI, trackPointsTableObserver);
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break;
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case SAMPLED_OUT_TRACK_POINTS_TABLE:
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// Do nothing. SAMPLED_OUT_POINT_UPDATES is mapped to POINT_UPDATES.
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break;
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case PREFERENCE:
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dataSource.registerOnSharedPreferenceChangeListener(preferenceListener);
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break;
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default:
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break;
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}
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}
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/**
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* Unregisters a listener with data source.
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*
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* @param trackDataType listener data type
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*/
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private void unregisterListener(TrackDataType trackDataType) {
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switch (trackDataType) {
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case TRACKS_TABLE:
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dataSource.unregisterContentObserver(tracksTableObserver);
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break;
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case WAYPOINTS_TABLE:
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dataSource.unregisterContentObserver(waypointsTableObserver);
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break;
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case SAMPLED_IN_TRACK_POINTS_TABLE:
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dataSource.unregisterContentObserver(trackPointsTableObserver);
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break;
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case SAMPLED_OUT_TRACK_POINTS_TABLE:
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// Do nothing. SAMPLED_OUT_POINT_UPDATES is mapped to POINT_UPDATES.
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break;
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case PREFERENCE:
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dataSource.unregisterOnSharedPreferenceChangeListener(preferenceListener);
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break;
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default:
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break;
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}
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}
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/**
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* Unregisters all listeners with data source.
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*/
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public void unregisterAllListeners() {
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for (TrackDataType trackDataType : TrackDataType.values()) {
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unregisterListener(trackDataType);
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}
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}
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/**
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* Observer when the tracks table is updated.
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*
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* @author Jimmy Shih
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*/
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private class TracksTableObserver extends ContentObserver {
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public TracksTableObserver() {
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super(handler);
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}
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@Override
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public void onChange(boolean selfChange) {
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dataSourceListener.notifyTracksTableUpdated();
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}
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}
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/**
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* Observer when the waypoints table is updated.
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*
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* @author Jimmy Shih
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*/
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private class WaypointsTableObserver extends ContentObserver {
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public WaypointsTableObserver() {
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super(handler);
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}
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@Override
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public void onChange(boolean selfChange) {
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dataSourceListener.notifyWaypointsTableUpdated();
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}
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}
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/**
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* Observer when the track points table is updated.
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*
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* @author Jimmy Shih
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*/
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private class TrackPointsTableObserver extends ContentObserver {
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public TrackPointsTableObserver() {
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super(handler);
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}
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@Override
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public void onChange(boolean selfChange) {
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dataSourceListener.notifyTrackPointsTableUpdated();
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}
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}
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/**
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* Listener for preference changes.
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*
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* @author Jimmy Shih
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*/
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private class PreferenceListener implements OnSharedPreferenceChangeListener {
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@Override
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public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
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dataSourceListener.notifyPreferenceChanged(key);
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}
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}
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}
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