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

Introduction

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

Source

/*
 *            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 java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import com.dwdesign.tweetings.model.ParcelableUser;
import com.dwdesign.tweetings.util.ArrayUtils;

import twitter4j.IDs;
import twitter4j.ResponseList;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.User;
import android.content.Context;
import android.content.SharedPreferences;

public abstract class IDsUsersLoader extends ParcelableUsersLoader {

    private final long mMaxId, mAccountId;
    private IDs mIDs;
    private final SharedPreferences mPreferences;
    private final int mLoadItemLimit;

    public IDsUsersLoader(final Context context, final long account_id, final long max_id,
            final List<ParcelableUser> users_list) {
        super(context, account_id, users_list);
        mAccountId = account_id;
        mMaxId = max_id;
        mPreferences = getContext().getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
        final int prefs_load_item_limit = mPreferences.getInt(PREFERENCE_KEY_LOAD_ITEM_LIMIT,
                PREFERENCE_DEFAULT_LOAD_ITEM_LIMIT);
        mLoadItemLimit = prefs_load_item_limit > 100 ? 100 : prefs_load_item_limit;
    }

    public abstract IDs getIDs() throws TwitterException;

    public long[] getIDsArray() {
        return mIDs != null ? mIDs.getIDs() : null;
    }

    public int getLoadItemLimit() {
        return mLoadItemLimit;
    }

    @Override
    public List<ParcelableUser> getUsers() throws TwitterException {
        final Twitter twitter = getTwitter();
        if (twitter == null)
            return null;
        if (mIDs == null) {
            mIDs = getIDs();
            if (mIDs == null)
                return null;
        }
        final long[] ids = mIDs.getIDs();
        final int max_id_idx = mMaxId > 0 ? ArrayUtils.indexOf(ids, mMaxId) : 0;
        if (max_id_idx < 0)
            return null;
        if (max_id_idx == ids.length - 1)
            return Collections.emptyList();
        final int count = max_id_idx + mLoadItemLimit < ids.length ? mLoadItemLimit : ids.length - max_id_idx;
        final long[] ids_to_load = new long[count];
        int temp_idx = max_id_idx;
        for (int i = 0; i < count; i++) {
            ids_to_load[i] = ids[temp_idx];
            temp_idx++;
        }
        final ResponseList<User> users = twitter.lookupUsers(ids_to_load);
        final List<ParcelableUser> result = new ArrayList<ParcelableUser>();
        for (final User user : users) {
            final int position = ArrayUtils.indexOf(mIDs.getIDs(), user.getId());
            result.add(new ParcelableUser(user, mAccountId, position));
        }
        return result;
    }

}