| 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; |
| |
| /** |
| * @author Attila Szegedi |
| */ |
| 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) { |
| return Class.forName("freemarker.ext.jsp._FreeMarkerPageContext1"); |
| } |
| } |
| } |
| 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); |
| } |
| } |
| |
| } |