| /* |
| * 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.Servlet; |
| import javax.servlet.ServletContext; |
| import javax.servlet.ServletRequest; |
| import javax.servlet.ServletResponse; |
| import javax.servlet.jsp.JspApplicationContext; |
| import javax.servlet.jsp.JspEngineInfo; |
| import javax.servlet.jsp.JspFactory; |
| import javax.servlet.jsp.PageContext; |
| |
| class FreeMarkerJspFactory extends JspFactory { |
| private static final String SPECIFICATION_VERSION = "2.2"; |
| |
| // This still ends with "21", just in case someone used that key for some workaround. |
| private static final String JSPCTX_KEY = "freemarker.ext.jsp.FreeMarkerJspFactory21#jspAppContext"; |
| |
| String getSpecificationVersion() { |
| return SPECIFICATION_VERSION; |
| } |
| |
| @Override |
| public JspEngineInfo getEngineInfo() { |
| return new JspEngineInfo() { |
| @Override |
| public String getSpecificationVersion() { |
| return FreeMarkerJspFactory.this.getSpecificationVersion(); |
| } |
| }; |
| } |
| |
| @Override |
| public PageContext getPageContext(Servlet servlet, ServletRequest request, |
| ServletResponse response, String errorPageURL, |
| boolean needsSession, int bufferSize, boolean autoFlush) { |
| // This is never meant to be called. JSP pages compiled to Java |
| // bytecode use this API, but in FreeMarker, we're running templates, |
| // and not JSP pages precompiled to bytecode, therefore we have no use |
| // for this API. |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void releasePageContext(PageContext ctx) { |
| // This is never meant to be called. JSP pages compiled to Java |
| // bytecode use this API, but in FreeMarker, we're running templates, |
| // and not JSP pages precompiled to bytecode, therefore we have no use |
| // for this API. |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public JspApplicationContext getJspApplicationContext(ServletContext ctx) { |
| JspApplicationContext jspctx = (JspApplicationContext) ctx.getAttribute( |
| JSPCTX_KEY); |
| if (jspctx == null) { |
| synchronized (ctx) { |
| jspctx = (JspApplicationContext) ctx.getAttribute(JSPCTX_KEY); |
| if (jspctx == null) { |
| jspctx = new FreeMarkerJspApplicationContext(); |
| ctx.setAttribute(JSPCTX_KEY, jspctx); |
| } |
| } |
| } |
| return jspctx; |
| } |
| |
| } |