br.com.cybereagle.androidlibrary.loader.OnLoadCompleteListenerCollector.java Source code

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Here is the source code for br.com.cybereagle.androidlibrary.loader.OnLoadCompleteListenerCollector.java

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/*
 * Copyright 2013 Cyber Eagle
 *
 *    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 br.com.cybereagle.androidlibrary.loader;

import java.lang.reflect.Field;

import android.support.v4.content.Loader;
import android.support.v4.content.Loader.OnLoadCompleteListener;
import android.util.Log;

/**
 * Classe que usada para hackear o comportamento padro do Loader para que se possa 
 * transform-lo em um coletor de dados.
 * @author fernandocamargo
 *
 * @param <T>
 */
public class OnLoadCompleteListenerCollector<T> implements Loader.OnLoadCompleteListener<T> {

    private Loader.OnLoadCompleteListener<T> onLoadCompleteListener;

    private Field haveDataField;

    public OnLoadCompleteListenerCollector(OnLoadCompleteListener<T> onLoadCompleteListener) {
        this.onLoadCompleteListener = onLoadCompleteListener;
    }

    @Override
    public void onLoadComplete(Loader<T> loader, T data) {
        onLoadCompleteListener.onLoadComplete(loader, data);
        try {
            if (haveDataField == null) {
                Class<?> clazz = onLoadCompleteListener.getClass();
                haveDataField = clazz.getDeclaredField("mHaveData");
            }
            if (!haveDataField.isAccessible()) {
                haveDataField.setAccessible(true);
            }
            haveDataField.setBoolean(onLoadCompleteListener, false);
        } catch (NoSuchFieldException e) {
            Log.e(getClass().getSimpleName(), "mHaveData no foi encontrado!");
        } catch (IllegalArgumentException e) {
            Log.e(getClass().getSimpleName(), "mHaveData no aceitou o valor boolean!");
        } catch (IllegalAccessException e) {

        }
    }

    public Loader.OnLoadCompleteListener<T> getOriginalOnLoadCompleteListener() {
        return onLoadCompleteListener;
    }

}