001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.camel.util.jndi;
018
019import java.util.Hashtable;
020import javax.naming.Context;
021import javax.naming.NamingException;
022import javax.naming.spi.InitialContextFactory;
023
024import org.apache.camel.util.CastUtils;
025
026/**
027 * A factory of the Camel {@link javax.naming.InitialContext} which allows a {@link java.util.Map} to be used to create a
028 * JNDI context.
029 * <p/>
030 * This implementation is prototype based, by creating a <b>new</b> context on each call to
031 * {@link #getInitialContext(java.util.Hashtable)}.
032 *
033 * @version 
034 */
035public class CamelInitialContextFactory implements InitialContextFactory {
036
037    /**
038     * Creates a new context with the given environment.
039     *
040     * @param  environment  the environment, must not be <tt>null</tt>
041     * @return the created context.
042     * @throws NamingException is thrown if creation failed.
043     */
044    public Context getInitialContext(Hashtable<?, ?> environment) throws NamingException {
045        try {
046            return new JndiContext(CastUtils.cast(environment, String.class, Object.class));
047        } catch (Exception e) {
048            if (e instanceof NamingException) {
049                throw (NamingException) e;
050            }
051            NamingException exception = new NamingException(e.getMessage());
052            exception.initCause(e);
053            throw exception;
054        }
055    }
056}