content: /**
   *  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.aries.blueprint.spring.extender;
  
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.core.SpringVersion;
  
  /**
   * Resolves spring xsd version.
   *
   */
  public class SpringXsdVersionResolver {
  
      private static final Logger LOGGER = LoggerFactory.getLogger(SpringXsdVersionResolver.class);
      private static final String DEFAULT_VERSION = "4.3"; // latest version
      private static final Pattern PATTERN = Pattern.compile("^\\d*\\.\\d*");
  
      /**
       * It will call a Spring method that returns the full version. Expects
       * format 4.2.2.RELEASE and 4.2 will be returned.
       *
       * @return String containing the xsd version.
       */
      public static String resolve() {
          final String fullVersion = SpringVersion.getVersion();
          if (fullVersion != null) {
              final Matcher matcher = PATTERN.matcher(fullVersion);
              if (matcher.find()) {
                  return matcher.group(0);
              }
          }
          LOGGER.trace("Could not resolve xsd version from Spring's version {}", fullVersion);
  
          return DEFAULT_VERSION;
  
      }
  }
  