com.jsw.MngProductDatabase.Presenter.CategoryPresenter.java Source code

Introduction

Here is the source code for com.jsw.MngProductDatabase.Presenter.CategoryPresenter.java

Source

package com.jsw.MngProductDatabase.Presenter;

/*
 * Copyright (c) 2017 Jos Luis del Pino Gallardo.
 *
 *  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.
 *
 *  jose.gallardo994@gmail.com
 */

import android.app.Activity;
import android.app.LoaderManager;
import android.content.Context;
import android.content.Loader;
import android.database.Cursor;
import android.os.Bundle;
import android.support.v4.widget.CursorAdapter;

import com.jsw.MngProductDatabase.Cursors.CategoryCursorLoader;
import com.jsw.MngProductDatabase.Model.Category;
import com.jsw.MngProductDatabase.database.DatabaseManager;
import com.jsw.MngProductDatabase.interfaces.ICategoryPresenter;

/**
 * Created by usuario on 26/01/17.
 */

public class CategoryPresenter implements ICategoryPresenter, LoaderManager.LoaderCallbacks<Cursor> {

    private final static int CATEGORY = 1;
    private ICategoryPresenter.View view;
    private Context context;

    public CategoryPresenter(ICategoryPresenter.View view) {
        this.view = view;
        this.context = view.getContext();
    }

    @Override
    public void getAllCategories(CursorAdapter adapter) {
        //Cursor cursor = DatabaseManager.getInstance().getAllCategories();
        //adapter.swapCursor(cursor);

        ((Activity) context).getLoaderManager().initLoader(CATEGORY, null, this); //Inicializamos el cargador dentro del presentador.
    }

    public void addCategory(Category category) {
        DatabaseManager.getInstance().addCategory(category);
        this.restartLoader();
    }

    private void restartLoader() {
        ((Activity) context).getLoaderManager().restartLoader(CATEGORY, null, this);
    }

    /**
     * Instantiate and return a new Loader for the given ID.
     *
     * @param id   The ID whose loader is to be created.
     * @param args Any arguments supplied by the caller.
     * @return Return a new Loader instance that is ready to start loading.
     */
    @Override
    public Loader<Cursor> onCreateLoader(int id, Bundle args) {

        CategoryCursorLoader ccl;

        switch (id) {
        case CATEGORY:
            ccl = new CategoryCursorLoader(context);
            break;
        default:
            ccl = null;
        }

        return ccl;
    }

    @Override
    public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
        view.setCursorCategory(data);
    }

    /**
     * Called when a previously created loader is being reset, and thus
     * making its data unavailable.  The application should at this point
     * remove any references it has to the Loader's data.
     *
     * @param loader The Loader that is being reset.
     */
    @Override
    public void onLoaderReset(Loader<Cursor> loader) {
        view.setCursorCategory(null);
    }
}