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.component.jms;
018    
019    import org.apache.camel.util.ObjectHelper;
020    
021    /**
022     * @version $Revision: 13614 $
023     */
024    public final class JmsHelper {
025    
026        private static final String DEFAULT_QUEUE_BROWSE_STRATEGY = "org.apache.camel.component.jms.DefaultQueueBrowseStrategy";
027    
028        private JmsHelper() {
029            // utility class
030        }
031    
032        /**
033         * Is the spring version 2.0.x?
034         *
035         * @return <tt>true</tt> if 2.0.x or <tt>false</tt> if newer such as 2.5.x
036         */
037        public static boolean isSpring20x() {
038            // this class is only possible to instantiate in 2.5.x or newer
039            Class<?> type = ObjectHelper.loadClass(DEFAULT_QUEUE_BROWSE_STRATEGY, JmsComponent.class.getClassLoader());
040            if (type != null) {
041                try {
042                    ObjectHelper.newInstance(type);
043                    return false;
044                } catch (NoClassDefFoundError e) {
045                    return true;
046                }
047            } else {
048                return true;
049            }
050        }
051    
052    }