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.guice;
018    
019    import java.util.HashSet;
020    import java.util.Set;
021    
022    import com.google.inject.Injector;
023    import com.google.inject.Provides;
024    import com.google.inject.internal.Sets;
025    
026    import org.apache.camel.RoutesBuilder;
027    
028    /**
029     * A Guice Module which injects the CamelContext with the specified {@link org.apache.camel.RoutesBuilder} types - which are then injected by Guice.
030     * <p>
031     * If you wish to bind all of the bound {@link org.apache.camel.RoutesBuilder} implementations available - maybe with some filter applied - then
032     * please use the {@link org.apache.camel.guice.CamelModuleWithMatchingRoutes}.
033     * <p>
034     * Or if you would like to specify exactly which {@link org.apache.camel.RoutesBuilder} to bind then use the {@link CamelModule} and create a provider
035     * method annotated with @Provides and returning Set<Routes> such as
036     * <code><pre>
037     * public class MyModule extends CamelModule {
038     *   &#64;Provides
039     *   Set&lt;Routes&gt; routes(Injector injector) { ... }
040     * }
041     * </pre></code>
042     * 
043     *
044     * @version $Revision: 13679 $
045     */
046    public class CamelModuleWithRouteTypes extends CamelModule {
047        private Set<Class<? extends RoutesBuilder>> routes;
048    
049        public CamelModuleWithRouteTypes(Class<? extends RoutesBuilder>... routeTypes) {
050            this.routes = new HashSet<Class<? extends RoutesBuilder>>();
051            for (Class<? extends RoutesBuilder> route : routeTypes) {
052                routes.add(route);
053            }
054        }
055    
056        public CamelModuleWithRouteTypes(Set<Class<? extends RoutesBuilder>> routes) {
057            this.routes = routes;
058        }
059    
060        @Provides
061        Set<RoutesBuilder> routes(Injector injector) {
062            Set<RoutesBuilder> answer = Sets.newHashSet();
063            for (Class<? extends RoutesBuilder> type : routes) {
064                RoutesBuilder route = injector.getInstance(type);
065                answer.add(route);
066            }
067            return answer;
068        }
069    }