| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package freemarker.ext.jsp; |
| |
| import javax.servlet.jsp.PageContext; |
| |
| import freemarker.core.Environment; |
| import freemarker.template.TemplateModel; |
| import freemarker.template.TemplateModelException; |
| import freemarker.template.utility.UndeclaredThrowableException; |
| |
| /** |
| */ |
| class PageContextFactory { |
| private static final Class pageContextImpl = getPageContextImpl(); |
| |
| private static Class getPageContextImpl() { |
| try { |
| try { |
| PageContext.class.getMethod("getELContext", (Class[]) null); |
| return Class.forName("freemarker.ext.jsp._FreeMarkerPageContext21"); |
| } catch (NoSuchMethodException e1) { |
| try { |
| PageContext.class.getMethod("getExpressionEvaluator", (Class[]) null); |
| return Class.forName("freemarker.ext.jsp._FreeMarkerPageContext2"); |
| } catch (NoSuchMethodException e2) { |
| throw new IllegalStateException( |
| "Since FreeMarker 2.3.24, JSP support requires at least JSP 2.0."); |
| } |
| } |
| } catch (ClassNotFoundException e) { |
| throw new NoClassDefFoundError(e.getMessage()); |
| } |
| } |
| |
| static FreeMarkerPageContext getCurrentPageContext() throws TemplateModelException { |
| Environment env = Environment.getCurrentEnvironment(); |
| TemplateModel pageContextModel = env.getGlobalVariable(PageContext.PAGECONTEXT); |
| if (pageContextModel instanceof FreeMarkerPageContext) { |
| return (FreeMarkerPageContext) pageContextModel; |
| } |
| try { |
| FreeMarkerPageContext pageContext = |
| (FreeMarkerPageContext) pageContextImpl.newInstance(); |
| env.setGlobalVariable(PageContext.PAGECONTEXT, pageContext); |
| return pageContext; |
| } catch (IllegalAccessException e) { |
| throw new IllegalAccessError(e.getMessage()); |
| } catch (InstantiationException e) { |
| throw new UndeclaredThrowableException(e); |
| } |
| } |
| |
| } |