com.meetingninja.csse.database.BaseDatabaseAdapter.java Source code

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Here is the source code for com.meetingninja.csse.database.BaseDatabaseAdapter.java

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/*******************************************************************************
 * Copyright (C) 2014 The Android Open Source Project
 * 
 * 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.meetingninja.csse.database;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;

import android.net.Uri;
import android.util.Log;

import com.android.volley.Request;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.meetingninja.csse.ApplicationController;
import com.meetingninja.csse.extras.JsonUtils;

public abstract class BaseDatabaseAdapter {

    protected final static String BASE_URL = "http://csse371-04.csse.rose-hulman.edu/";
    protected final static String USER_AGENT = "Mozilla/5.0";
    protected final static String CONTENT_TYPE = "application/json";
    protected final static String ACCEPT_TYPE = "application/json";
    protected final static ObjectMapper MAPPER = JsonUtils.getObjectMapper();
    protected final static JsonFactory JFACTORY = JsonUtils.getJsonFactory();

    protected interface IRequest {
        final String GET = "GET";
        final String POST = "POST";
        final String PUT = "PUT";
        final String DELETE = "DELETE";
    }

    public static String getBaseUrl() {
        return BASE_URL;
    }

    public static Uri.Builder getBaseUri() {
        return Uri.parse(getBaseUrl()).buildUpon();
    }

    protected static void addRequestHeader(URLConnection connection, boolean isPost) {
        connection.setRequestProperty("User-Agent", USER_AGENT);
        connection.setRequestProperty("Accept", ACCEPT_TYPE);
        connection.setDoOutput(isPost);
        if (isPost) {
            connection.setRequestProperty("Content-Type", CONTENT_TYPE);
        }
    }

    protected static int sendPostPayload(URLConnection connection, String payload) throws IOException {
        Log.d(IRequest.POST, "[URL] " + connection.getURL().toString());
        logPrint(payload);

        DataOutputStream wr = new DataOutputStream(connection.getOutputStream());
        wr.writeBytes(payload);
        wr.flush();
        wr.close();
        return ((HttpURLConnection) connection).getResponseCode();
    }

    protected static String getServerResponse(URLConnection connection) throws IOException {
        // Read server response
        BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String inputLine;
        StringBuffer response = new StringBuffer();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        // return page contents
        return response.toString();
    }

    protected static String updateHelper(String jsonPayload) throws IOException {
        // Server URL setup
        String _url = getBaseUri().build().toString();

        // Establish connection
        URL url = new URL(_url);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();

        // add request header
        conn.setRequestMethod(IRequest.PUT);
        addRequestHeader(conn, true);

        int responseCode = sendPostPayload(conn, jsonPayload);
        String response = getServerResponse(conn);
        conn.disconnect();
        return response;
    }

    protected static void addToRequestQueue(Request<?> req) {
        ApplicationController.getInstance().addToRequestQueue(req, "JSON");
    }

    protected static void logPrint(String payload) {
        Log.i("JSON", payload);
    }

    protected static void logError(final String tag, final JsonNode errorNode) {
        Log.e(tag, String.format("ErrorID: [%s] %s", errorNode.get(Keys.ERROR_ID).asText(),
                errorNode.get(Keys.ERROR_MESSAGE).asText()));
    }
}