/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.camel.guice;

import java.util.HashSet;
import java.util.Set;

import com.google.inject.Injector;
import com.google.inject.Provides;
import com.google.inject.internal.Sets;

import org.apache.camel.RoutesBuilder;

/**
 * A Guice Module which injects the CamelContext with the specified {@link org.apache.camel.RoutesBuilder} types - which are then injected by Guice.
 * <p>
 * If you wish to bind all of the bound {@link org.apache.camel.RoutesBuilder} implementations available - maybe with some filter applied - then
 * please use the {@link org.apache.camel.guice.CamelModuleWithMatchingRoutes}.
 * <p>
 * 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
 * method annotated with @Provides and returning Set<Routes> such as
 * <code><pre>
 * public class MyModule extends CamelModule {
 *   &#64;Provides
 *   Set&lt;Routes&gt; routes(Injector injector) { ... }
 * }
 * </pre></code>
 * 
 *
 * @version $Revision: 788067 $
 */
public class CamelModuleWithRouteTypes extends CamelModule {
    private Set<Class<? extends RoutesBuilder>> routes;

    public CamelModuleWithRouteTypes(Class<? extends RoutesBuilder>... routeTypes) {
        this.routes = new HashSet<Class<? extends RoutesBuilder>>();
        for (Class<? extends RoutesBuilder> route : routeTypes) {
            routes.add(route);
        }
    }

    public CamelModuleWithRouteTypes(Set<Class<? extends RoutesBuilder>> routes) {
        this.routes = routes;
    }

    @Provides
    Set<RoutesBuilder> routes(Injector injector) {
        Set<RoutesBuilder> answer = Sets.newHashSet();
        for (Class<? extends RoutesBuilder> type : routes) {
            RoutesBuilder route = injector.getInstance(type);
            answer.add(route);
        }
        return answer;
    }
}
