com.ibm.iot.auto.bluemix.samples.ui.Connection.java Source code

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Here is the source code for com.ibm.iot.auto.bluemix.samples.ui.Connection.java

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/**
 * Copyright 2016 IBM Corp. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the gLicenseh);
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  https://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 gAS ISh 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.ibm.iot.auto.bluemix.samples.ui;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;

import org.apache.commons.codec.binary.Base64;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class Connection {

    private String apiBaseUrl;
    private String tenantId;
    private String userName;
    private String password;

    private String authorizationValue;

    public Connection(Configuration config) {
        this.apiBaseUrl = config.apiBaseUrl();
        this.tenantId = config.tenantId();
        this.userName = config.userName();
        this.password = config.password();
        String authorizationString = userName + ":" + password;
        authorizationValue = new String(Base64.encodeBase64(authorizationString.getBytes()));
    }

    public JSONArray getJSONArray(String urlTail) throws IOException, JSONException {
        JSONArray jsonArray = null;
        HttpURLConnection httpURLConnection = null;
        try {
            httpURLConnection = createHttpURLGetConnection(urlTail);
            InputStreamReader connectionInputStreamReader = new InputStreamReader(
                    httpURLConnection.getInputStream());
            BufferedReader bufferedReader = new BufferedReader(connectionInputStreamReader);
            String jsonString = "";
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                jsonString += line;
            }
            jsonArray = new JSONArray(jsonString);
        } finally {
            disconnectIfRequired(httpURLConnection);
        }
        return jsonArray;
    }

    public JSONArray getJSONArray(String urlTail, String parameters) throws IOException, JSONException {
        JSONArray jsonArray = null;
        HttpURLConnection httpURLConnection = null;
        try {
            httpURLConnection = createHttpURLGetConnection(urlTail, parameters);
            InputStreamReader connectionInputStreamReader = new InputStreamReader(
                    httpURLConnection.getInputStream());
            BufferedReader bufferedReader = new BufferedReader(connectionInputStreamReader);
            String jsonString = "";
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                jsonString += line;
            }
            jsonArray = new JSONArray(jsonString);
        } finally {
            disconnectIfRequired(httpURLConnection);
        }
        return jsonArray;
    }

    public JSONArray getJSONArray(String urlTail, JSONObject parameters) throws IOException, JSONException {
        JSONArray jsonArray = null;
        HttpURLConnection httpURLConnection = null;
        try {
            httpURLConnection = createHttpURLPostConnection(urlTail, parameters);
            InputStreamReader connectionInputStreamReader = new InputStreamReader(
                    httpURLConnection.getInputStream());
            BufferedReader bufferedReader = new BufferedReader(connectionInputStreamReader);
            String jsonString = "";
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                jsonString += line;
            }
            jsonArray = new JSONArray(jsonString);
        } finally {
            disconnectIfRequired(httpURLConnection);
        }
        return jsonArray;
    }

    public JSONObject getJSONObject(String urlTail) throws IOException, JSONException {
        JSONObject jsonObject = null;
        HttpURLConnection httpURLConnection = null;
        try {
            httpURLConnection = createHttpURLGetConnection(urlTail);
            InputStreamReader connectionInputStreamReader = new InputStreamReader(
                    httpURLConnection.getInputStream());
            BufferedReader bufferedReader = new BufferedReader(connectionInputStreamReader);
            String jsonString = "";
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                jsonString += line;
            }
            jsonObject = new JSONObject(jsonString);
        } finally {
            disconnectIfRequired(httpURLConnection);
        }
        return jsonObject;
    }

    public JSONObject getJSONObject(String urlTail, String parameters) throws IOException, JSONException {
        JSONObject jsonObject = null;
        HttpURLConnection httpURLConnection = null;
        try {
            httpURLConnection = createHttpURLGetConnection(urlTail, parameters);
            InputStreamReader connectionInputStreamReader = new InputStreamReader(
                    httpURLConnection.getInputStream());
            BufferedReader bufferedReader = new BufferedReader(connectionInputStreamReader);
            String jsonString = "";
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                jsonString += line;
            }
            jsonObject = new JSONObject(jsonString);
        } finally {
            disconnectIfRequired(httpURLConnection);
        }
        return jsonObject;
    }

    private HttpURLConnection createHttpURLGetConnection(String urlTail) throws IOException {
        URL url = new URL(apiBaseUrl + urlTail + "?tenant_id=" + tenantId);
        HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
        httpURLConnection.setRequestProperty("Authorization", "Basic " + authorizationValue);
        httpURLConnection.setRequestMethod("GET");
        return httpURLConnection;
    }

    private HttpURLConnection createHttpURLGetConnection(String urlTail, String parameters) throws IOException {
        URL url = new URL(apiBaseUrl + urlTail + "?tenant_id=" + tenantId + "&" + parameters);
        HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
        httpURLConnection.setRequestProperty("Authorization", "Basic " + authorizationValue);
        httpURLConnection.setRequestMethod("GET");
        return httpURLConnection;
    }

    private HttpURLConnection createHttpURLPostConnection(String urlTail, JSONObject parameters)
            throws IOException, JSONException {
        URL url = new URL(apiBaseUrl + urlTail + "?tenant_id=" + tenantId);
        HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
        httpURLConnection.setRequestProperty("Authorization", "Basic " + authorizationValue);
        httpURLConnection.setRequestMethod("POST");
        httpURLConnection.setDoOutput(true);
        OutputStreamWriter connectionOutputStreamWriter = new OutputStreamWriter(
                httpURLConnection.getOutputStream());
        parameters.write(connectionOutputStreamWriter);
        return httpURLConnection;
    }

    private void disconnectIfRequired(HttpURLConnection connection) {
        if (connection != null) {
            connection.disconnect();
        }
    }

}