de.hadesrofl.json.JsonReader.java Source code

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Here is the source code for de.hadesrofl.json.JsonReader.java

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/**
 * Copyright 2016   Rene Kremer
 *
 * 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 de.hadesrofl.json;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;

import org.json.JSONObject;

/**
 *
 *
 * <b>Project:</b> mqtt-client
 * <p>
 * <b>Packages:</b> de.hadesrofl.mqtt_client
 * </p>
 * <p>
 * <b>File:</b> JsonReader.java
 * </p>
 * <p>
 * <b>last update:</b> 04.11.2016
 * </p>
 * <p>
 * <b>Time:</b> 20:38:25
 * </p>
 * <b>Description:</b>
 * <p>
 * Reader for json files
 * </p>
 *
 * @author Rene Kremer
 *         <p>
 *         Copyright (c) 2016 by Rene Kremer
 *         </p>
 *         <p>
 *         Licensed under the Apache License, Version 2.0
 *         </p>
 * @version 0.21
 */
public class JsonReader {
    /**
     * Reads a json file and returns it as JSONObject
     *
     * @param file
     *            is the file to read
     * @return an json object
     */
    public static JSONObject readFile(String file) {
        if (file != null && file.compareTo("") != 0)
            return readFile(new File(file));
        else
            return null;
    }

    /**
     * Reads a json file and returns it as JSONObject
     *
     * @param file
     *            is the file to read
     * @return an json object
     */
    public static JSONObject readFile(File f) {
        String jsonData = "";
        BufferedReader br = null;
        try {
            String line;
            br = new BufferedReader(new FileReader(f));
            while ((line = br.readLine()) != null) {
                jsonData += line + "\n";
            }
        } catch (IOException e) {
            System.err.println("Can't read json file!");
        } finally {
            try {
                if (br != null)
                    br.close();
            } catch (IOException ex) {
                System.err.println("Can't close buffered reader!");
            }
        }
        JSONObject obj = null;
        if (jsonData.compareTo("") != 0)
            obj = new JSONObject(jsonData);
        return obj;
    }
}