001    /**
002     *
003     * Copyright 2003-2004 The Apache Software Foundation
004     *
005     *  Licensed under the Apache License, Version 2.0 (the "License");
006     *  you may not use this file except in compliance with the License.
007     *  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    
018    //
019    // This source code implements specifications defined by the Java
020    // Community Process. In order to remain compliant with the specification
021    // DO NOT add / change / or delete method signatures!
022    //
023    
024    package javax.servlet.jsp;
025    
026    /**
027     * The JspEngineInfo is an abstract class that provides information on the
028     * current JSP engine.
029     */
030    
031    public abstract class JspEngineInfo {
032    
033        /**
034         * Sole constructor. (For invocation by subclass constructors, 
035         * typically implicit.)
036         */
037        public JspEngineInfo() {
038        }
039        
040        /**
041         * Return the version number of the JSP specification that is supported by
042         * this JSP engine.
043         * <p>
044         * Specification version numbers that consists of positive decimal integers
045         * separated by periods ".", for example, "2.0" or "1.2.3.4.5.6.7".
046         * This allows an extensible number to be used to
047         * represent major, minor, micro, etc versions.
048         * The version number must begin with a number.
049         * </p>
050         *
051         * @return the specification version, null is returned if it is not known
052         */
053    
054        public abstract String getSpecificationVersion();
055    }