/*
* JORAM: Java(TM) Open Reliable Asynchronous Messaging
* Copyright (C) 2006 ScalAgent Distributed Technologies
*
* This library 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 any later version.
*
* This library 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*
* Initial developer(s): ScalAgent Distributed Technologies
* Contributor(s):
*/
package org.objectweb.joram.shared.selectors;
import org.objectweb.joram.shared.selectors.Checker;
import org.objectweb.joram.shared.selectors.Lexer;
import org.objectweb.joram.shared.excepts.SelectorException;
/**
* The <code>ClientSelector</code> class is used for checking the correctness
* of a selector client side.
*/
public class ClientSelector {
/**
* Clients call this method to check a selector syntax.
*
* @return <code>true</code> when the syntax is ok.
* @exception SelectorException When the selector syntax is incorrect.
*/
public static boolean checks(String selector) throws SelectorException
{
if (selector == null || selector.equals(""))
return true;
try {
Checker checker = new Checker(new Lexer(selector));
return ((Boolean) checker.parse().value).booleanValue();
} catch (SelectorException sE) {
throw sE;
} catch (Throwable t) {
throw new SelectorException("Invalid selector: " + t.getMessage());
}
}
}