actual freya branch

L2J_Server/java/com/l2jserver/gameserver/script/Expression.java

@@ -0,0 +1,97 @@
+/*
+ * 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 java.util.logging.Level;
+import java.util.logging.Logger;
+
+import javax.script.ScriptContext;
+
+import com.l2jserver.gameserver.scripting.L2ScriptEngineManager;
+
+public class Expression
+{
+	protected static final Logger _log = Logger.getLogger(Expression.class.getName());
+	private final ScriptContext _context;
+	
+	public static Object eval(String lang, String code)
+	{
+		try
+		{
+			return L2ScriptEngineManager.getInstance().eval(lang, code);
+		}
+		catch (Exception e)
+		{
+			_log.log(Level.WARNING, "", e);
+			return null;
+		}
+	}
+	
+	public static Object eval(ScriptContext context, String lang, String code)
+	{
+		try
+		{
+			return L2ScriptEngineManager.getInstance().eval(lang, code, context);
+		}
+		catch (Exception e)
+		{
+			_log.log(Level.WARNING, "", e);
+			return null;
+		}
+	}
+	
+	public static Expression create(ScriptContext context, String lang, String code)
+	{
+		try
+		{
+			return new Expression(context, lang, code);
+		}
+		catch (Exception e)
+		{
+			_log.log(Level.WARNING, "", e);
+			return null;
+		}
+	}
+	
+	private Expression(ScriptContext pContext, String pLang, String pCode)
+	{
+		_context = pContext;
+	}
+	
+	public <T> void addDynamicVariable(String name, T value)
+	{
+		try
+		{
+			_context.setAttribute(name, value, ScriptContext.ENGINE_SCOPE);
+		}
+		catch (Exception e)
+		{
+			_log.log(Level.WARNING, "", e);
+		}
+	}
+	
+	public void removeDynamicVariable(String name)
+	{
+		try
+		{
+			_context.removeAttribute(name, ScriptContext.ENGINE_SCOPE);
+		}
+		catch (Exception e)
+		{
+			_log.log(Level.WARNING, "", e);
+		}
+	}
+	
+}