/*
* JBoss, Home of Professional Open Source.
* Copyright 2010, Red Hat, Inc., 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.as.naming.deployment;
import org.jboss.as.naming.logging.NamingLogger;
import org.jboss.msc.inject.Injector;
import org.jboss.msc.value.InjectedValue;
import org.jboss.msc.value.Value;
import javax.naming.Context;
import javax.naming.NamingException;
/**
* Value that is looked up from a naming context.
*
* @author John E. Bailey
*/
public class NamingLookupValue<T> implements Value<T> {
private final InjectedValue<Context> contextValue = new InjectedValue<Context>();
private final String contextName;
/**
* Create a new instance.
*
* @param contextName The context name to lookup if the value is not injected
*/
public NamingLookupValue(final String contextName) {
this.contextName = contextName;
}
/**
* Lookup the value from the naming context.
*
* @return the injected value if present, the value retrieved from the context if not.
* @throws IllegalStateException The name is not found in the context when called
*/
public T getValue() throws IllegalStateException {
final Context context = contextValue.getValue();
try {
return (T)context.lookup(contextName);
} catch (NamingException e) {
throw NamingLogger.ROOT_LOGGER.entryNotRegistered(e, contextName, context);
}
}
/**
* Get the naming context injector.
*
* @return The context injector
*/
public Injector<Context> getContextInjector() {
return contextValue;
}
}