org.kawanfw.sql.json.IntArrayTransport Maven / Gradle / Ivy

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/*
 * This file is part of AceQL. 
 * AceQL: Remote JDBC access over HTTP.                                     
 * Copyright (C) 2015,  KawanSoft SAS
 * (http://www.kawansoft.com). All rights reserved.                                
 *                                                                               
 * AceQL is free software; you can redistribute it and/or                 
 * modify it under the terms of the GNU Lesser General Public                    
 * License as published by the Free Software Foundation; either                  
 * version 2.1 of the License, or (at your option) any later version.            
 *                                                                               
 * AceQL is distributed in the hope that it will be useful,               
 * but WITHOUT ANY WARRANTY; without even the implied warranty of                
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU             
 * Lesser General Public License for more details.                               
 *                                                                               
 * You should have received a copy of the GNU Lesser General Public              
 * License along with this library; if not, write to the Free Software           
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  
 * 02110-1301  USA
 *
 * Any modifications to this file must keep this entire header
 * intact.
 */
package org.kawanfw.sql.json;

import java.util.List;
import java.util.Vector;
import java.util.logging.Level;

import org.json.simple.JSONArray;
import org.json.simple.JSONValue;
import org.kawanfw.commons.util.ClientLogger;
import org.kawanfw.commons.util.FrameworkDebug;

/**
 * @author Nicolas de Pomereu Class to transport int arrays between PC and Host
 *         with JSON
 */

public class IntArrayTransport {

    /** For debug info */
    private static boolean DEBUG = FrameworkDebug
	    .isSet(IntArrayTransport.class);

    /**
     * Format to JSON a int array
     * 
     * @param intArray
     *            the in array to format
     * @return the JSON string
     */
    public static String toJson(int[] intArray) {
	if (intArray == null) {
	    throw new IllegalArgumentException("batchResults is null!");
	}

	List list = new Vector();
	for (int i = 0; i < intArray.length; i++) {
	    list.add(intArray[i]);
	}

	// NO!
	// List list = Arrays.asList(intArray);

	String jsonString = JSONValue.toJSONString(list);
	debug(jsonString);
	return jsonString;

    }

    /**
     * Format from JSON an int array
     * 
     * @param jsonString
     *            the inat array in JSON format
     * @return the int array
     */
    public static int[] fromJson(String jsonString) {
	if (jsonString == null) {
	    throw new IllegalArgumentException("jsonString is null!");
	}

	debug(jsonString);

	Object JSONArray = JSONValue.parse(jsonString);
	JSONArray jsonArray = (JSONArray) JSONArray;

	int[] intArray = new int[jsonArray.size()];

	for (int i = 0; i < jsonArray.size(); i++) {
	    long myLong = (Long) jsonArray.get(i);
	    intArray[i] = (int) myLong;
	}

	// free JSONArray
	jsonArray = null;

	return intArray;

    }

    /**
     * @param args
     */
    public static void main(String[] args) throws Exception {
	int[] myArray = { 1, 3, 5, 7, 9 };
	String s = IntArrayTransport.toJson(myArray);

	System.out.println(s);

	int[] backArray = IntArrayTransport.fromJson(s);

	int cpt = 0;
	System.out.print("[");
	for (int i : backArray) {
	    System.out.print(i);
	    if (cpt++ < backArray.length - 1)
		System.out.print(",");
	}
	System.out.println("]");

    }

    private static void debug(String s) {
	if (DEBUG) {
	    ClientLogger.getLogger().log(Level.WARNING, s);
	}
    }

}