/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.aries.jndi.url;
import java.util.Hashtable;
import javax.naming.ConfigurationException;
import javax.naming.Context;
import javax.naming.Name;
import javax.naming.NamingException;
import javax.naming.spi.ObjectFactory;
import org.osgi.framework.BundleContext;
/**
* A factory for the aries JNDI context
*/
public class OsgiURLContextFactory implements ObjectFactory {
private BundleContext callerContext;
public OsgiURLContextFactory(BundleContext callerContext) {
this.callerContext = callerContext;
}
public Object getObjectInstance(Object obj,
Name name,
Context nameCtx,
Hashtable<?, ?> environment) throws Exception {
if (obj == null) {
return new ServiceRegistryContext(callerContext, environment);
} else if (obj instanceof String) {
return findAny(environment, (String)obj);
} else if (obj instanceof String[]) {
return findAny(environment, (String[]) obj);
} else {
return null;
}
}
/**
* Try each URL until either lookup succeeds or they all fail
*/
private Object findAny(Hashtable<?, ?> environment, String ... urls)
throws ConfigurationException, NamingException {
if (urls.length == 0) {
throw new ConfigurationException("0");
}
Context context = new ServiceRegistryContext(callerContext, environment);
try {
NamingException ne = null;
for (int i = 0; i < urls.length; i++) {
try {
return context.lookup(urls[i]);
} catch (NamingException e) {
ne = e;
}
}
throw ne;
} finally {
context.close();
}
}
}