private void generatePreamble()

in src/main/java/org/apache/sling/scripting/jsp/jasper/compiler/Generator.java [561:670]
69 lines of code
6 McCabe index (conditional complexity)

    private void generatePreamble(Node.Nodes page) throws JasperException {

        String servletPackageName = ctxt.getServletPackageName();
        String servletClassName = ctxt.getServletClassName();
        String serviceMethodName = Constants.SERVICE_METHOD_NAME;

        // First the package name:
        genPreamblePackage(servletPackageName);

        // Generate imports
        genPreambleImports();

        // Generate class declaration
        out.printin("public final class ");
        out.print(servletClassName);
        out.print(" extends ");
        out.println(pageInfo.getExtends());
        out.printin("    implements org.apache.sling.scripting.jsp.jasper.runtime.JspSourceDependent");
        if (!pageInfo.isThreadSafe()) {
            out.println(",");
            out.printin("                 SingleThreadModel");
        }
        out.println(" {");
        out.pushIndent();

        // Class body begins here
        generateDeclarations(page);

        // Static initializations here
        genPreambleStaticInitializers();

        // Class variable declarations
        genPreambleClassVariableDeclarations(servletClassName);

        // Constructor
        // generateConstructor(className);

        // Methods here
        genPreambleMethods();

        // Now the service method
        out.printin("public void ");
        out.print(serviceMethodName);
        out.println("(HttpServletRequest request, HttpServletResponse response)");
        out.println("        throws java.io.IOException, ServletException {");

        out.pushIndent();
        out.println();

        // Local variable declarations
        out.printil("PageContext pageContext = null;");

        if (pageInfo.isSession()) {
            out.printil("HttpSession session = null;");
        }

        if (pageInfo.isErrorPage()) {
            out.printil("Throwable exception = org.apache.sling.scripting.jsp.jasper.runtime.JspRuntimeLibrary.getThrowable(request);");
            // Removed the following block because of SLING-2094
            // If we leave it in, an error handler will always set the status code to 500!
     /*       out.printil("if (exception != null) {");
            out.pushIndent();
            out.printil("response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);");
            out.popIndent();
            out.printil("}");*/
        }

        out.printil("ServletContext application = null;");
        out.printil("ServletConfig config = null;");
        out.printil("JspWriter out = null;");
        out.printil("Object page = this;");

        out.printil("JspWriter _jspx_out = null;");
        out.printil("PageContext _jspx_page_context = null;");
        out.println();

        declareTemporaryScriptingVars(page);
        out.println();

        out.printil("try {");
        out.pushIndent();

        out.printin("response.setContentType(");
        out.print(quote(pageInfo.getContentType()));
        out.println(");");

        if (ctxt.getOptions().isXpoweredBy()) {
            out.printil("response.addHeader(\"X-Powered-By\", \"JSP/2.1\");");
        }

        out
                .printil("pageContext = _jspxFactory.getPageContext(this, request, response,");
        out.printin("\t\t\t");
        out.print(quote(pageInfo.getErrorPage()));
        out.print(", " + pageInfo.isSession());
        out.print(", " + pageInfo.getBuffer());
        out.print(", " + pageInfo.isAutoFlush());
        out.println(");");
        out.printil("_jspx_page_context = pageContext;");

        out.printil("application = pageContext.getServletContext();");
        out.printil("config = pageContext.getServletConfig();");

        if (pageInfo.isSession()) {
            out.printil("session = pageContext.getSession();");
        }
        out.printil("out = pageContext.getOut();");
        out.printil("_jspx_out = out;");
        out.println();
    }