org.jboss.services.deployment.ContextHelper Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This 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.
*
* This software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.services.deployment;
import org.jboss.logging.Logger;
/**
* Helper class to pass in to velocity templates and
* do things that are more easily performed in java code.
*
* @author Dimitris Andreadis
* @version $Revision: 81038 $
*/
public final class ContextHelper
{
// Static --------------------------------------------------------
/** the Logger instance */
private static final Logger log = Logger.getLogger(ContextHelper.class);
// Private Data --------------------------------------------------
// Constructors --------------------------------------------------
/**
* Default CTOR
*/
public ContextHelper()
{
// empty
}
// Public --------------------------------------------------------
/**
* Convenience method to find out if a variable is defined (not null).
* This helps particularly to check if a Boolean variable has been
* passed to the velocity context, since the #if( $boolean )
* construct is only satisfied, if the value both exists and is true.
*
* @param obj any object
* @return true if the object is not null, false otherwise
*/
public static boolean isDefined(Object obj)
{
return obj != null ? true : false;
}
}