BlueprintURLContextFactory.java

/*
 * 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 WARRANTIESOR 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.Context;
import javax.naming.Name;
import javax.naming.spi.ObjectFactory;

import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import org.osgi.service.jndi.JNDIConstants;

import org.apache.aries.jndi.spi.AugmenterInvoker;

public class BlueprintURLContextFactory implements ObjectFactory {

  final private Bundle _callersBundle;

  private static AugmenterInvoker augmenterInvoker = null;

  public BlueprintURLContextFactory(Bundle callersBundle) {
    _callersBundle = callersBundle;
  }

  @Override
  public Object getObjectInstance(Object obj, Name name, Context callersCtx, Hashtable<?, ?> envmt) throws Exception {

    if (augmenterInvoker == null && _callersBundle != null) {
      BundleContext callerBundleContext = _callersBundle.getBundleContext();
      ServiceReference augmenterSR = callerBundleContext.getServiceReference(AugmenterInvoker.class.getName());
      if (augmenterSR != null) augmenterInvoker = (AugmenterInvoker) callerBundleContext.getService(augmenterSR);
    }
    if (augmenterInvoker != null) augmenterInvoker.augmentEnvironment(envmt);

    BundleContext bc = (BundleContext) envmt.get(JNDIConstants.BUNDLE_CONTEXT);
    if (augmenterInvoker != null) augmenterInvoker.unaugmentEnvironment(envmt);
   
    Bundle b = (bc != null)? bc.getBundle() : null;
    Object result = null;
    if (obj == null) {
      result = new BlueprintURLContext((b == null) ? _callersBundle : b,
          envmt);
    } else if (obj instanceof String) {
      Context ctx = null;
      try {
        ctx = new BlueprintURLContext((b == null) ? _callersBundle : b,
            envmt);
        result = ctx.lookup((String) obj);
      } finally {
        if (ctx != null) {
          ctx.close();
        }
      }
    } 
    return result;
  }

}