1   /*
    2   * Licensed to the Apache Software Foundation (ASF) under one or more
    3   * contributor license agreements.  See the NOTICE file distributed with
    4   * this work for additional information regarding copyright ownership.
    5   * The ASF licenses this file to You under the Apache License, Version 2.0
    6   * (the "License"); you may not use this file except in compliance with
    7   * the License.  You may obtain a copy of the License at
    8   *
    9   *     http://www.apache.org/licenses/LICENSE-2.0
   10   *
   11   * Unless required by applicable law or agreed to in writing, software
   12   * distributed under the License is distributed on an "AS IS" BASIS,
   13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   14   * See the License for the specific language governing permissions and
   15   * limitations under the License.
   16   */ 
   17   package javax.servlet.jsp;
   18   
   19   /**
   20    * The JspEngineInfo is an abstract class that provides information on the
   21    * current JSP engine.
   22    */
   23   
   24   public abstract class JspEngineInfo {
   25   
   26       /**
   27        * Sole constructor. (For invocation by subclass constructors, 
   28        * typically implicit.)
   29        */
   30       public JspEngineInfo() {
   31       }
   32       
   33       /**
   34        * Return the version number of the JSP specification that is supported by
   35        * this JSP engine.
   36        * <p>
   37        * Specification version numbers that consists of positive decimal integers
   38        * separated by periods ".", for example, "2.0" or "1.2.3.4.5.6.7".
   39        * This allows an extensible number to be used to
   40        * represent major, minor, micro, etc versions.
   41        * The version number must begin with a number.
   42        * </p>
   43        *
   44        * @return the specification version, null is returned if it is not known
   45        */
   46   
   47       public abstract String getSpecificationVersion();
   48   }