net.peterkuterna.android.apps.devoxxsched.io.RemoteRoomsHandler.java Source code

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Here is the source code for net.peterkuterna.android.apps.devoxxsched.io.RemoteRoomsHandler.java

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/*
 * Copyright 2010 Peter Kuterna
 *
 * 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 net.peterkuterna.android.apps.devoxxsched.io;

import static net.peterkuterna.android.apps.devoxxsched.util.ParserUtils.sanitizeId;

import java.util.ArrayList;
import java.util.HashSet;

import net.peterkuterna.android.apps.devoxxsched.provider.ScheduleContract;
import net.peterkuterna.android.apps.devoxxsched.provider.ScheduleContract.Rooms;
import net.peterkuterna.android.apps.devoxxsched.util.Lists;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.content.ContentProviderOperation;
import android.content.ContentResolver;
import android.net.Uri;
import android.util.Log;

/**
 * Handle a remote {@link JSONArray} that defines a set of {@link Rooms}
 * entries.
 */
public class RemoteRoomsHandler extends JSONHandler {

    private static final String TAG = "RoomsHandler";

    public RemoteRoomsHandler() {
        super(ScheduleContract.CONTENT_AUTHORITY);
    }

    @Override
    public ArrayList<ContentProviderOperation> parse(ArrayList<JSONArray> entries, ContentResolver resolver)
            throws JSONException {
        final ArrayList<ContentProviderOperation> batch = Lists.newArrayList();
        final HashSet<String> roomIds = new HashSet<String>();

        int nrEntries = 0;
        for (JSONArray rooms : entries) {
            Log.d(TAG, "Retrieved " + rooms.length() + " room entries.");
            nrEntries += rooms.length();

            for (int i = 0; i < rooms.length(); i++) {
                JSONObject room = rooms.getJSONObject(i);
                String id = room.getString("id");

                final String roomId = sanitizeId(id);
                final Uri roomUri = Rooms.buildRoomUri(roomId);
                roomIds.add(roomId);

                ContentProviderOperation.Builder builder;
                if (isRowExisting(Rooms.buildRoomUri(roomId), RoomsQuery.PROJECTION, resolver)) {
                    builder = ContentProviderOperation.newUpdate(roomUri);
                } else {
                    builder = ContentProviderOperation.newInsert(Rooms.CONTENT_URI);
                    builder.withValue(Rooms.ROOM_ID, roomId);
                }
                builder.withValue(Rooms.NAME, room.getString("name"));
                builder.withValue(Rooms.CAPACITY, room.getString("capacity"));
                batch.add(builder.build());
            }
        }

        if (isRemoteSync() && nrEntries > 0) {
            for (String lostId : getLostIds(roomIds, Rooms.CONTENT_URI, RoomsQuery.PROJECTION, RoomsQuery.ROOM_ID,
                    resolver)) {
                final Uri lostRoomUri = Rooms.buildRoomUri(lostId);
                batch.add(ContentProviderOperation.newDelete(lostRoomUri).build());
            }
        }

        return batch;
    }

    private interface RoomsQuery {
        String[] PROJECTION = { Rooms.ROOM_ID, };

        int ROOM_ID = 0;
    }

}