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.blueprint;
018    
019    import java.util.LinkedHashSet;
020    import java.util.Set;
021    
022    import org.apache.aries.blueprint.ExtendedBeanMetadata;
023    import org.osgi.service.blueprint.container.BlueprintContainer;
024    import org.osgi.service.blueprint.reflect.ComponentMetadata;
025    
026    /**
027     * A helper class to find the ids of the {@link BlueprintCamelContext} defined
028     * in the {@link org.osgi.service.blueprint.container.BlueprintContainer}
029     */
030    public final class BlueprintCamelContextLookupHelper {
031    
032        private BlueprintCamelContextLookupHelper() {
033        }
034    
035        /**
036         * Lookup all the {@link BlueprintCamelContext} in the {@link BlueprintContainer}.
037         *
038         * @param container the blueprint container, must be provided
039         * @return a set with the ids of the {@link BlueprintCamelContext}, never <tt>null</tt>, but can be empty set.
040         */
041        public static Set<String> lookupBlueprintCamelContext(BlueprintContainer container) {
042            Set<String> ids = new LinkedHashSet<String>();
043            for (Object id : container.getComponentIds()) {
044                ComponentMetadata meta = container.getComponentMetadata(id.toString());
045    
046                // must be extended meta, to see if its the blueprint camel context
047                if (meta instanceof ExtendedBeanMetadata) {
048                    Class<?> clazz = ((ExtendedBeanMetadata) meta).getRuntimeClass();
049                    if (clazz != null && BlueprintCamelContext.class.isAssignableFrom(clazz)) {
050                        // okay we found a BlueprintCamelContext
051                        ids.add(meta.getId());
052                    }
053                }
054            }
055            return ids;
056        }
057    }