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     */
017    package org.apache.camel.builder;
018    
019    import org.apache.camel.CamelContext;
020    import org.apache.camel.Endpoint;
021    import org.apache.camel.component.bean.ProxyHelper;
022    import org.apache.camel.util.ObjectHelper;
023    
024    /**
025     * A build to create Camel proxies.
026     *
027     * @version 
028     */
029    public final class ProxyBuilder {
030    
031        private final CamelContext camelContext;
032        private Endpoint endpoint;
033    
034        public ProxyBuilder(CamelContext camelContext) {
035            this.camelContext = camelContext;
036        }
037    
038        /**
039         * Send the proxied message to this endpoint
040         *
041         * @param url  uri of endpoint
042         * @return the builder
043         */
044        public ProxyBuilder endpoint(String url) {
045            this.endpoint = camelContext.getEndpoint(url);
046            return this;
047        }
048    
049        /**
050         * Send the proxied message to this endpoint
051         *
052         * @param endpoint  the endpoint
053         * @return the builder
054         */
055        public ProxyBuilder endpoint(Endpoint endpoint) {
056            this.endpoint = endpoint;
057            return this;
058        }
059    
060        /**
061         * Builds the proxy.
062         *
063         * @param interfaceClass  the service interface
064         * @return the proxied bean
065         * @throws Exception is thrown if error creating the proxy
066         */
067        @SuppressWarnings("unchecked")
068        public <T> T build(Class<T> interfaceClass) throws Exception {
069            // this method is introduced to avoid compiler warnings about the
070            // generic Class arrays in the case we've got only one single Class
071            // to build a Proxy for
072            return build((Class<T>[]) new Class[] {interfaceClass});
073        }
074    
075        /**
076         * Builds the proxy.
077         *
078         * @param interfaceClasses  the service interface(s)
079         * @return the proxied bean
080         * @throws Exception is thrown if error creating the proxy
081         */
082        public <T> T build(Class<T>... interfaceClasses) throws Exception {
083            ObjectHelper.notNull(endpoint, "endpoint");
084            return ProxyHelper.createProxy(endpoint, interfaceClasses);
085        }
086    
087    }