001    /**
002     *
003     * Licensed to the Apache Software Foundation (ASF) under one or more
004     * contributor license agreements.  See the NOTICE file distributed with
005     * this work for additional information regarding copyright ownership.
006     * The ASF licenses this file to You under the Apache License, Version 2.0
007     * (the "License"); you may not use this file except in compliance with
008     * the License.  You may obtain a copy of the License at
009     *
010     * http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    package org.apache.camel.util;
019    
020    import org.apache.camel.Endpoint;
021    import org.apache.camel.Exchange;
022    import org.apache.camel.NoSuchEndpointException;
023    
024    /**
025     * Some helper methods for working with {@link Exchange} objects
026     *
027     * @version $Revision: 532790 $
028     */
029    public class ExchangeHelper {
030    
031        /**
032         * Attempts to resolve the endpoint for the given value
033         *
034         * @param exchange the message exchange being processed
035         * @param value the value which can be an {@link Endpoint} or an object which provides a String representation
036         * of an endpoint via {@link #toString()}
037         *
038         * @return the endpoint
039         * @throws NoSuchEndpointException if the endpoint cannot be resolved
040         */
041        @SuppressWarnings({"unchecked"})
042        public static <E extends Exchange> Endpoint<E> resolveEndpoint(E exchange, Object value) throws NoSuchEndpointException {
043            Endpoint<E> endpoint;
044            if (value instanceof Endpoint) {
045                endpoint = (Endpoint<E>) value;
046            }
047            else {
048                String uri = value.toString();
049                endpoint = (Endpoint<E>) exchange.getContext().getEndpoint(uri);
050                if (endpoint == null) {
051                    throw new NoSuchEndpointException(uri);
052                }
053            }
054            return endpoint;
055        }
056    }