//$Id: NamingHelper.java 8149 2005-09-11 21:10:52Z oneovthafew $
package org.hibernate.util;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.Name;
import javax.naming.NameNotFoundException;
import javax.naming.NamingException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.hibernate.cfg.Environment;
public final class NamingHelper {
private static final Logger log = LoggerFactory.getLogger(NamingHelper.class);
public static InitialContext getInitialContext(Properties props) throws NamingException {
Hashtable hash = getJndiProperties(props);
log.info("JNDI InitialContext properties:" + hash);
try {
return hash.size()==0 ?
new InitialContext() :
new InitialContext(hash);
}
catch (NamingException e) {
log.error("Could not obtain initial context", e);
throw e;
}
}
/**
* Bind val to name in ctx, and make sure that all intermediate contexts exist.
*
* @param ctx the root context
* @param name the name as a string
* @param val the object to be bound
* @throws NamingException
*/
public static void bind(Context ctx, String name, Object val) throws NamingException {
try {
log.trace("binding: " + name);
ctx.rebind(name, val);
}
catch (Exception e) {
Name n = ctx.getNameParser("").parse(name);
while ( n.size() > 1 ) {
String ctxName = n.get(0);
Context subctx=null;
try {
log.trace("lookup: " + ctxName);
subctx = (Context) ctx.lookup(ctxName);
}
catch (NameNotFoundException nfe) {}
if (subctx!=null) {
log.debug("Found subcontext: " + ctxName);
ctx = subctx;
}
else {
log.info("Creating subcontext: " + ctxName);
ctx = ctx.createSubcontext(ctxName);
}
n = n.getSuffix(1);
}
log.trace("binding: " + n);
ctx.rebind(n, val);
}
log.debug("Bound name: " + name);
}
/**
* Transform JNDI properties passed in the form <tt>hibernate.jndi.*</tt> to the
* format accepted by <tt>InitialContext</tt> by triming the leading "<tt>hibernate.jndi</tt>".
*/
public static Properties getJndiProperties(Properties properties) {
HashSet specialProps = new HashSet();
specialProps.add(Environment.JNDI_CLASS);
specialProps.add(Environment.JNDI_URL);
Iterator iter = properties.keySet().iterator();
Properties result = new Properties();
while ( iter.hasNext() ) {
String prop = (String) iter.next();
if ( prop.indexOf(Environment.JNDI_PREFIX) > -1 && !specialProps.contains(prop) ) {
result.setProperty(
prop.substring( Environment.JNDI_PREFIX.length()+1 ),
properties.getProperty(prop)
);
}
}
String jndiClass = properties.getProperty(Environment.JNDI_CLASS);
String jndiURL = properties.getProperty(Environment.JNDI_URL);
// we want to be able to just use the defaults,
// if JNDI environment properties are not supplied
// so don't put null in anywhere
if (jndiClass != null) result.put(Context.INITIAL_CONTEXT_FACTORY, jndiClass);
if (jndiURL != null) result.put(Context.PROVIDER_URL, jndiURL);
return result;
}
private NamingHelper() {}
}