001 package org.apache.myfaces.tobago.util;
002
003 /*
004 * Licensed to the Apache Software Foundation (ASF) under one or more
005 * contributor license agreements. See the NOTICE file distributed with
006 * this work for additional information regarding copyright ownership.
007 * The ASF licenses this file to You under the Apache License, Version 2.0
008 * (the "License"); you may not use this file except in compliance with
009 * the License. You may obtain a copy of the License at
010 *
011 * http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 */
019
020 import javax.faces.application.Application;
021
022 public enum FacesVersion {
023
024 VERSION_11,
025 VERSION_12,
026 VERSION_20;
027
028 private static FacesVersion currentVersion;
029
030 static {
031 try {
032 Application.class.getMethod("getExpressionFactory");
033
034 try {
035 Application.class.getMethod("getExceptionHandler");
036
037 currentVersion = VERSION_20;
038
039
040 } catch (NoSuchMethodException e) {
041 currentVersion = VERSION_12;
042 }
043
044 } catch (NoSuchMethodException e) {
045 currentVersion = VERSION_11;
046 }
047 }
048
049 /**
050 * Does the JSF is version 1.2 or higher
051 * @return Supports 1.2 or higher
052 */
053 public static boolean supports12() {
054 return currentVersion == VERSION_12 || currentVersion == VERSION_20;
055 }
056
057 /**
058 * Does the JSF is version 2.0 or higher
059 * @return Supports 2.0 or higher
060 */
061 public static boolean supports20() {
062 return currentVersion == VERSION_20;
063 }
064 }