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.component.ref;
018
019import java.util.Map;
020
021import org.apache.camel.Endpoint;
022import org.apache.camel.impl.DefaultComponent;
023import org.apache.camel.util.CamelContextHelper;
024
025/**
026 * Component for lookup of existing endpoints bound in the {@link org.apache.camel.spi.Registry}.
027 * <p/>
028 * This component uses the <tt>ref:</tt> notation instead of the mostly common <tt>uri:</tt> notation. 
029 */
030public class RefComponent extends DefaultComponent {
031
032    protected Endpoint createEndpoint(String uri, String remaining, Map<String, Object> parameters) throws Exception {
033        // first remove the scheme from the URI
034        int index = uri.indexOf(':');
035        String name = uri;
036        if (index >= 0) {
037            name = uri.substring(index + 1);
038        }
039        if (name.startsWith("//")) {
040            name = name.substring(2);
041        }
042        return lookupEndpoint(name, parameters);
043    }
044
045    /**
046     * Looks up a mandatory endpoint for a given name.
047     * <p/>
048     * Derived classes could use this name as a logical name and look it up on some registry.
049     * <p/>
050     * The default implementation will do a mandatory look up the name in the {@link org.apache.camel.spi.Registry}.
051     *
052     * @throws org.apache.camel.NoSuchBeanException if not found in the {@link org.apache.camel.spi.Registry}
053     */
054    protected Endpoint lookupEndpoint(String name, Map<String, Object> parameters) {
055        return CamelContextHelper.mandatoryLookup(getCamelContext(), name, Endpoint.class);
056    }
057}