net.carbon14.android.ProviderManager.java Source code

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Here is the source code for net.carbon14.android.ProviderManager.java

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/*
 * Copyright (C) 2009 Anton Rau
 *
 * 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 net.carbon14.android;

import java.io.IOException;
import java.util.Dictionary;
import java.util.HashMap;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;

import android.content.Context;
import android.net.ConnectivityManager;
import android.widget.Toast;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;

public class ProviderManager {
    public static boolean carbonEnabled;
    public static boolean energyEnabled;
    public static boolean aprioriEnabled;
    public static boolean upcEnabled;

    public static HashMap<String, Provider> providers;
    public final static String PROVIDERS_URL = "http://carbon-14.appspot.com/services/providers/get";

    private ConnectivityManager connectivityManager;

    public ProviderManager(ConnectivityManager connectivityManager) {
        // TODO Auto-generated constructor stub
        this.connectivityManager = connectivityManager;
    }

    public boolean reload() {
        if (!connectivityManager.getActiveNetworkInfo().isAvailable())
            return false;

        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpGet request = new HttpGet(PROVIDERS_URL);

        ResponseHandler<String> responseHandler = new BasicResponseHandler();
        try {
            String responseBody = httpClient.execute(request, responseHandler);
            httpClient.getConnectionManager().shutdown();

            XStream xstream = new XStream(new DomDriver());
            xstream.alias("provider", Provider.class);
            xstream.alias("providers", Provider[].class);

            Provider[] providersArray = (Provider[]) xstream.fromXML(responseBody);
            providers = new HashMap<String, Provider>(providersArray.length);
            for (Provider provider : providersArray) {
                providers.put(provider.getName(), provider);
            }

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return (providers != null);
    }
}