com.manning.androidhacks.hack023.api.TodoServiceImpl.java Source code

Introduction

Here is the source code for com.manning.androidhacks.hack023.api.TodoServiceImpl.java

Source

/*******************************************************************************
 * Copyright (c) 2012 Manning
 * See the file license.txt for copying permission.
 ******************************************************************************/
package com.manning.androidhacks.hack023.api;

import java.io.IOException;
import java.lang.reflect.Type;
import java.util.List;
import org.apache.http.auth.AuthenticationException;
import android.util.Log;
import com.google.gson.Gson;
import com.google.gson.JsonParseException;
import com.google.gson.reflect.TypeToken;
import com.manning.androidhacks.hack023.exception.AndroidHacksException;
import com.manning.androidhacks.hack023.model.Todo;
import com.manning.androidhacks.hack023.net.HttpHelper;

public class TodoServiceImpl {
    private static final String TAG = TodoServiceImpl.class.getCanonicalName();

    public static List<Todo> fetchTodos()
            throws AuthenticationException, JsonParseException, IOException, AndroidHacksException {
        Log.d(TAG, "Fetching Todo's...");
        String url = AndroidHacksUrlFactory.getInstance().getTodoUrl();
        String response = HttpHelper.getHttpResponseAsString(url, null);
        Gson gson = new Gson();
        List<Todo> lists = gson.fromJson(response, getToken());

        return lists;
    }

    private static Type getToken() {
        return new TypeToken<List<Todo>>() {
        }.getType();
    }

    public static Todo createTodo(String title)
            throws AuthenticationException, JsonParseException, IOException, AndroidHacksException {
        Log.d(TAG, "Creating Todo list " + title);
        String urlFmt = AndroidHacksUrlFactory.getInstance().getTodoAddUrlFmt();
        String url = String.format(urlFmt, title);
        String response = HttpHelper.getHttpResponseAsString(url, null);

        Gson gson = new Gson();
        List<Todo> lists = gson.fromJson(response, getToken());

        if (lists.size() != 1) {
            throw new AndroidHacksException("Error creating Todo " + title);
        }

        return lists.get(0);
    }

    public static void deleteTodo(long id) throws AuthenticationException, AndroidHacksException {
        Log.d(TAG, "Deleting Todo with id " + id);
        String urlFmt = AndroidHacksUrlFactory.getInstance().getTodoDeleteUrlFmt();
        String url = String.format(urlFmt, id);
        HttpHelper.getHttpResponseAsString(url, null);
    }

}