l2j-server-game/L2_GameServer/java/com/l2jserver/gameserver/script/Expression.java

/*
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 * 
 * This program 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 General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package com.l2jserver.gameserver.script;

import javax.script.ScriptContext;

import com.l2jserver.gameserver.scripting.L2ScriptEngineManager;


public class Expression
{
    private final ScriptContext _context;
    @SuppressWarnings("unused")
    private final String _lang;
    @SuppressWarnings("unused")
    private final String _code;

    public static Object eval(String lang, String code)
    {
        try
        {
            return L2ScriptEngineManager.getInstance().eval(lang, code);
        }
        catch (Exception e)
        {
            e.printStackTrace();
            return null;
        }
    }

    public static Object eval(ScriptContext context, String lang, String code)
    {
        try
        {
            return L2ScriptEngineManager.getInstance().eval(lang, code, context);
        }
        catch (Exception e)
        {
            e.printStackTrace();
            return null;
        }
    }

    public static Expression create(ScriptContext context, String lang, String code)
    {
        try
        {
            return new Expression(context, lang, code);
        }
        catch (Exception e)
        {
            e.printStackTrace();
            return null;
        }
    }

    private Expression(ScriptContext pContext, String pLang, String pCode)
    {
        _context = pContext;
        _lang = pLang;
        _code = pCode;
    }

    public <T> void addDynamicVariable(String name, T value)
    {
        try
        {
            _context.setAttribute(name, value, ScriptContext.ENGINE_SCOPE);
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    public void removeDynamicVariable(String name)
    {
        try
        {
            _context.removeAttribute(name, ScriptContext.ENGINE_SCOPE);
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

}