com.dwdesign.tweetings.loader.UserListTimelineLoader.java Source code

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Here is the source code for com.dwdesign.tweetings.loader.UserListTimelineLoader.java

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/*
 *            Tweetings - Twitter client for Android
 * 
 * Copyright (C) 2012-2013 RBD Solutions Limited <apps@tweetings.net>
 * Copyright (C) 2012 Mariotaku Lee <mariotaku.lee@gmail.com>
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.dwdesign.tweetings.loader;

import static com.dwdesign.tweetings.util.Utils.findUserList;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import com.dwdesign.tweetings.model.ParcelableStatus;
import com.dwdesign.tweetings.model.SerializableStatus;
import com.dwdesign.tweetings.util.NoDuplicatesStateSavedList;
import com.dwdesign.tweetings.util.SynchronizedStateSavedList;

import twitter4j.Paging;
import twitter4j.ResponseList;
import twitter4j.Status;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.UserList;
import android.content.Context;
import android.os.Bundle;
import com.dwdesign.tweetings.util.SerializationUtil;

public class UserListTimelineLoader extends Twitter4JStatusLoader {

    private final long mUserId;
    private final String mScreenName, mListName;
    private final int mListId;
    private final Context mContext;

    public UserListTimelineLoader(final Context context, final long account_id, final int list_id,
            final long user_id, final String screen_name, final String list_name, final long max_id,
            final long since_id, final List<ParcelableStatus> data, final String class_name,
            final boolean is_home_tab) {
        super(context, account_id, max_id, since_id, data, class_name, is_home_tab);
        mContext = context;
        mListId = list_id;
        mUserId = user_id;
        mScreenName = screen_name;
        mListName = list_name;
    }

    @Override
    public ResponseList<Status> getStatuses(final Paging paging) throws TwitterException {
        if (mTwitter == null)
            return null;
        if (mListId > 0)
            return mTwitter.getUserListStatuses(mListId, paging);
        else {
            final UserList list = findUserList(mTwitter, mUserId, mScreenName, mListName);
            if (list != null && list.getId() > 0)
                return mTwitter.getUserListStatuses(list.getId(), paging);
        }
        return null;
    }

    @Override
    public SynchronizedStateSavedList<ParcelableStatus, Long> loadInBackground() {
        if (isFirstLoad() && isHomeTab() && getClassName() != null) {
            try {
                final String path = SerializationUtil.getSerializationFilePath(mContext, getClassName(), mAccountId,
                        mListId, mUserId, mScreenName, mListName);
                final SynchronizedStateSavedList<ParcelableStatus, Long> statuses = SerializationUtil.read(path);
                setLastViewedId(statuses.getState());
                final SynchronizedStateSavedList<ParcelableStatus, Long> data = getData();
                if (data != null && statuses != null) {
                    data.addAll(statuses);
                    Collections.sort(data);
                }
                return data;
            } catch (final IOException e) {
            } catch (final ClassNotFoundException e) {
            } catch (final ClassCastException e) {
            }
        }
        return super.loadInBackground();
    }

    public static void writeSerializableStatuses(final Object instance, final Context context,
            final List<ParcelableStatus> data, final long last_viewed_id, final Bundle args) {
        if (instance == null || context == null || data == null || args == null)
            return;
        final int list_id = args.getInt(INTENT_KEY_LIST_ID, -1);
        final long account_id = args.getLong(INTENT_KEY_ACCOUNT_ID, -1);
        final long user_id = args.getLong(INTENT_KEY_USER_ID, -1);
        final String screen_name = args.getString(INTENT_KEY_SCREEN_NAME);
        final String list_name = args.getString(INTENT_KEY_LIST_NAME);
        final int items_limit = context.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE)
                .getInt(PREFERENCE_KEY_DATABASE_ITEM_LIMIT, PREFERENCE_DEFAULT_DATABASE_ITEM_LIMIT);
        try {
            final int size = data.size();
            final SynchronizedStateSavedList<ParcelableStatus, Long> statuses = new SynchronizedStateSavedList<ParcelableStatus, Long>(
                    data.subList(0, size > items_limit ? items_limit : size));
            if (last_viewed_id > 0) {
                statuses.setState(last_viewed_id);
            }
            final String path = SerializationUtil.getSerializationFilePath(context,
                    instance.getClass().getSimpleName(), account_id, list_id, user_id, screen_name, list_name);
            SerializationUtil.write(statuses, path);
        } catch (final IOException e) {
        }
    }

}