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.builder.xml;
018    
019    import org.apache.camel.util.ObjectHelper;
020    
021    /**
022     * @version $Revision: $
023     */
024    public class Namespaces {
025        public static final String DEFAULT_NAMESPACE = "http://activemq.apache.org/camel/schema/spring";
026    
027        public static final String IN_NAMESPACE = "http://camel.apache.org/xml/in/";
028        public static final String OUT_NAMESPACE = "http://camel.apache.org/xml/out/";
029        public static final String SYSTEM_PROPERTIES_NAMESPACE = "http://camel.apache.org/xml/variables/system-properties";
030        public static final String ENVIRONMENT_VARIABLES = "http://camel.apache.org/xml/variables/environment-variables";
031        public static final String EXCHANGE_PROPERTY = "http://camel.apache.org/xml/variables/exchange-property";
032        
033        /**
034         * Utility classes should not have a public constructor.
035         */
036        private Namespaces() {        
037        }
038    
039        /**
040         * Returns true if the given namespaceURI is empty or if it matches the
041         * given expected namespace
042         */
043        public static boolean isMatchingNamespaceOrEmptyNamespace(String namespaceURI, String expectedNamespace) {
044            return ObjectHelper.isNullOrBlank(namespaceURI) || namespaceURI.equals(expectedNamespace);
045        }
046    
047    }