WrappedAsyncTaskLoader.java

/*
 *  Copyright (c) 2012 Daniel Huckaby
 *
 *  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 com.handlerexploit.prime.example.utils;

import android.content.Context;
import android.support.v4.content.AsyncTaskLoader;

/**
 * <a href="http://code.google.com/p/android/issues/detail?id=14944">Issue
 * 14944</a>
 * 
 * @author Alexander Blom
 */
public abstract class WrappedAsyncTaskLoader<D> extends AsyncTaskLoader<D> {

    private D data;

    public WrappedAsyncTaskLoader(Context context) {
        super(context);
    }

    @Override
    public void deliverResult(D data) {
        if (!isReset()) {
            this.data = data;
            super.deliverResult(data);
        }
    }

    @Override
    protected void onStartLoading() {
        if (data != null) {
            deliverResult(data);
        } else if (takeContentChanged() || data == null) {
            forceLoad();
        }
    }

    @Override
    protected void onStopLoading() {
        cancelLoad();
    }

    @Override
    protected void onReset() {
        super.onReset();
        onStopLoading();
        data = null;
    }
}