org.kawanfw.sql.json.StatementHolderTransportGson 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.lang.reflect.Type;
import java.util.List;

import org.kawanfw.commons.util.FrameworkDebug;

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

/**
 * 
 * Method fromJson/toJson to transport with Json a structure with Google Json
 * 
 * @author Nicolas de Pomereu
 * 
 */
public class StatementHolderTransportGson {
    /** Debug flag */
    private static boolean DEBUG = FrameworkDebug
	    .isSet(StatementHolderTransportGson.class);

    /**
     * Convert to Json a unique of StatementHolder
     * 
     * @return the instance converted to Json
     */
    @SuppressWarnings("unused")
    public static String toJson(StatementHolder statementHolder) {

	if (true)
	    throw new IllegalStateException("Not used anymore!");

	Gson gson = new Gson();
	Type theType = new TypeToken() {
	}.getType();
	String jsonString = gson.toJson(statementHolder, theType);
	return jsonString;
    }

    /**
     * Convert from a Json string a List of StatementHolder
     * 
     * @return the StatementHolder list converted from Json
     */
    @SuppressWarnings("unused")
    public static StatementHolder fromJson(String jsonString) {

	if (true)
	    throw new IllegalStateException("Not used anymore!");

	Gson gson = new Gson();
	Type theType = new TypeToken() {
	}.getType();

	StatementHolder statementHolder = gson.fromJson(jsonString, theType);
	return statementHolder;
    }

    /**
     * Convert to Json a List of StatementHolder
     * 
     * @return the instance converted to Json
     */
    @SuppressWarnings("unused")
    public static String toJson(

    List preparedStatementHolderList) {

	if (true)
	    throw new IllegalStateException("Not used anymore!");

	// See http://sites.google.com/site/gson/gson-user-guide
	Gson gson = new Gson();
	Type theType = new TypeToken>() {
	}.getType();
	String jsonString = gson.toJson(preparedStatementHolderList, theType);

	debug("List         : " + jsonString);
	debug("List length(): " + jsonString.length());
	return jsonString;
    }

    /**
     * Convert to Json a List of StatementHolder
     * 
     * @return the instance converted to Json
     */
    @SuppressWarnings("unused")
    public static List fromJsonList(String jsonString) {

	if (true)
	    throw new IllegalStateException("Not used anymore!");

	Gson gson = new Gson();
	Type theType = new TypeToken>() {
	}.getType();
	List statementHolder = gson.fromJson(jsonString,
		theType);
	return statementHolder;
    }

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

}