| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| ContainerUtils |
|
| 4.0;4 |
| 1 | /* | |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one | |
| 3 | * or more contributor license agreements. See the NOTICE file | |
| 4 | * distributed with this work for additional information | |
| 5 | * regarding copyright ownership. The ASF licenses this file | |
| 6 | * to you under the Apache License, Version 2.0 (the | |
| 7 | * "License"); you may not use this file except in compliance | |
| 8 | * with the License. You may obtain a copy of the License at | |
| 9 | * | |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 11 | * | |
| 12 | * Unless required by applicable law or agreed to in writing, | |
| 13 | * software distributed under the License is distributed on an | |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
| 15 | * KIND, either express or implied. See the License for the | |
| 16 | * specific language governing permissions and limitations | |
| 17 | * under the License. | |
| 18 | */ | |
| 19 | package org.apache.myfaces.util; | |
| 20 | ||
| 21 | /** | |
| 22 | * Utilities for determining the current container and for the unified | |
| 23 | * expression language. | |
| 24 | * | |
| 25 | */ | |
| 26 | 0 | public class ContainerUtils |
| 27 | { | |
| 28 | /** | |
| 29 | * Determines whether we're running in a Servlet 2.5/JSP 2.1 environment. | |
| 30 | * | |
| 31 | * @return <code>true</code> if we're running in a JSP 2.1 environment, | |
| 32 | * <code>false</code> otherwise | |
| 33 | */ | |
| 34 | public static boolean isJsp21() | |
| 35 | { | |
| 36 | try | |
| 37 | { | |
| 38 | // simply check if the class JspApplicationContext is available | |
| 39 | 0 | Class.forName("javax.servlet.jsp.JspApplicationContext"); |
| 40 | 0 | return true; |
| 41 | } | |
| 42 | 0 | catch (ClassNotFoundException ex) |
| 43 | { | |
| 44 | ; // expected exception in a JSP 2.0 (or less) environment | |
| 45 | } | |
| 46 | ||
| 47 | 0 | return false; |
| 48 | } | |
| 49 | ||
| 50 | /** | |
| 51 | * Return true if the specified string contains an EL expression. | |
| 52 | * | |
| 53 | * <p> | |
| 54 | * <strong>NOTICE</strong> This method is just a copy of | |
| 55 | * {@link UIComponentTag#isValueReference(String)}, but it's required | |
| 56 | * because the class UIComponentTag depends on a JSP 2.1 container | |
| 57 | * (for example, it indirectly implements the interface JspIdConsumer) | |
| 58 | * and therefore internal classes shouldn't access this class. That's | |
| 59 | * also the reason why this method is inside the class ContainerUtils, | |
| 60 | * because it allows MyFaces to be independent of a JSP 2.1 container. | |
| 61 | * </p> | |
| 62 | */ | |
| 63 | public static boolean isValueReference(String value) | |
| 64 | { | |
| 65 | 0 | if (value == null) { |
| 66 | 0 | throw new NullPointerException("value"); |
| 67 | } | |
| 68 | ||
| 69 | 0 | int start = value.indexOf("#{"); |
| 70 | 0 | if (start < 0) { |
| 71 | 0 | return false; |
| 72 | } | |
| 73 | ||
| 74 | 0 | int end = value.lastIndexOf('}'); |
| 75 | 0 | return (end >=0 && start < end); |
| 76 | } | |
| 77 | } |