001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *  http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing,
013     * software distributed under the License is distributed on an
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     * KIND, either express or implied.  See the License for the
016     * specific language governing permissions and limitations
017     * under the License.
018     */
019    
020    //
021    // This source code implements specifications defined by the Java
022    // Community Process. In order to remain compliant with the specification
023    // DO NOT add / change / or delete method signatures!
024    //
025    
026    package javax.servlet.jsp;
027    
028    /**
029     * The JspEngineInfo is an abstract class that provides information on the
030     * current JSP engine.
031     */
032    
033    public abstract class JspEngineInfo {
034    
035        /**
036         * Sole constructor. (For invocation by subclass constructors, 
037         * typically implicit.)
038         */
039        public JspEngineInfo() {
040        }
041        
042        /**
043         * Return the version number of the JSP specification that is supported by
044         * this JSP engine.
045         * <p>
046         * Specification version numbers that consists of positive decimal integers
047         * separated by periods ".", for example, "2.0" or "1.2.3.4.5.6.7".
048         * This allows an extensible number to be used to
049         * represent major, minor, micro, etc versions.
050         * The version number must begin with a number.
051         * </p>
052         *
053         * @return the specification version, null is returned if it is not known
054         */
055    
056        public abstract String getSpecificationVersion();
057    }