org.kawanfw.sql.json.no_obfuscation.ResultSetMetaDataHolderTransport 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.no_obfuscation;

import java.lang.reflect.Type;

import org.kawanfw.commons.util.FrameworkDebug;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

/**
 * Utility class to transport a ResultSetMetaDataHolder Client <==> Server
 * 
 * @author Nicolas de Pomereu
 * 
 */
public class ResultSetMetaDataHolderTransport {
    /** Debug flag */
    private static boolean DEBUG = FrameworkDebug
	    .isSet(ResultSetMetaDataHolderTransport.class);

    /**
     * Convert to Json a ResultSetMetaDataHolder and then format if to HTML
     * 
     * @return the instance converted to Json
     */
    public static String toJson(ResultSetMetaDataHolder resultSetMetaDataHolder) {
	// See http://sites.google.com/site/gson/gson-user-guide
	Gson gson = new Gson();
	Type theType = new TypeToken() {
	}.getType();
	String jsonString = gson.toJson(resultSetMetaDataHolder, theType);

	// free resultSetMetaDataHolder
	resultSetMetaDataHolder = null;

	// debug("PC parameterTypesAndValues jsonString: " + jsonString);
	//jsonString = HtmlConverter.toHtml(jsonString);

	return jsonString;
    }

    /**
     * Format from HTML & JSON string the ResultSetMetaDataHolder
     * 
     * @param jsonString
     *            formated JSON string containing the ResultSetMetaDataHolder
     * @return the ResultSetMetaDataHolder
     */
    public static ResultSetMetaDataHolder fromJson(String jsonString) {
	if (jsonString == null) {
	    throw new IllegalArgumentException("jsonString is null!");
	}

	//jsonString = HtmlConverter.fromHtml(jsonString);

	debug("jsonString: " + jsonString);

	// See http://sites.google.com/site/gson/gson-user-guide
	Gson gson = new Gson();
	Type theType = new TypeToken() {
	}.getType();
	ResultSetMetaDataHolder resultSetMetaDataHolder = gson.fromJson(
		jsonString, theType);
	return resultSetMetaDataHolder;
    }

    /**
     * Debug
     * 
     * @param s
     */
    public static void debug(String s) {
	if (DEBUG) {
	    System.out.println(s);
	}
    }

}