private void generateCustomStart()

in src/main/java/org/apache/sling/scripting/jsp/jasper/compiler/Generator.java [2173:2292]
94 lines of code
11 McCabe index (conditional complexity)

        private void generateCustomStart(Node.CustomTag n,
                TagHandlerInfo handlerInfo, String tagHandlerVar,
                String tagEvalVar, String tagPushBodyCountVar)
                throws JasperException {

//            Class tagHandlerClass = handlerInfo.getTagHandlerClass();

            out.printin("//  ");
            out.println(n.getQName());
            n.setBeginJavaLine(out.getJavaLine());

            // Declare AT_BEGIN scripting variables
            declareScriptingVars(n, VariableInfo.AT_BEGIN);
            saveScriptingVars(n, VariableInfo.AT_BEGIN);

            String tagHandlerClassName = handlerInfo.getTagHandlerClassName();
            out.printin(tagHandlerClassName);
            out.print(" ");
            out.print(tagHandlerVar);
            out.print(" = ");
            if (isPoolingEnabled && !(n.implementsJspIdConsumer())) {
                out.print("(");
                out.print(tagHandlerClassName);
                out.print(") ");
                out.print(n.getTagHandlerPoolName());
                out.print(".get(");
                out.print(tagHandlerClassName);
                out.println(".class);");
            } else {
                out.print("new ");
                out.print(tagHandlerClassName);
                out.println("();");
                out.printin("org.apache.sling.scripting.jsp.jasper.runtime.AnnotationHelper.postConstruct(");
                out.print(VAR_ANNOTATIONPROCESSOR);
                out.print(", ");
                out.print(tagHandlerVar);
                out.println(");");
            }

            // includes setting the context
            generateSetters(n, tagHandlerVar, handlerInfo, false);

            // JspIdConsumer (after context has been set)
            if (n.implementsJspIdConsumer()) {
                out.printin(tagHandlerVar);
                out.print(".setJspId(\"");
                out.print(createJspId());
                out.println("\");");
            }

            if (n.implementsTryCatchFinally()) {
                out.printin("int[] ");
                out.print(tagPushBodyCountVar);
                out.println(" = new int[] { 0 };");
                out.printil("try {");
                out.pushIndent();
            }
            out.printin("int ");
            out.print(tagEvalVar);
            out.print(" = ");
            out.print(tagHandlerVar);
            out.println(".doStartTag();");

            if (!n.implementsBodyTag()) {
                // Synchronize AT_BEGIN scripting variables
                syncScriptingVars(n, VariableInfo.AT_BEGIN);
            }

            if (!n.hasEmptyBody()) {
                out.printin("if (");
                out.print(tagEvalVar);
                out.println(" != javax.servlet.jsp.tagext.Tag.SKIP_BODY) {");
                out.pushIndent();

                // Declare NESTED scripting variables
                declareScriptingVars(n, VariableInfo.NESTED);
                saveScriptingVars(n, VariableInfo.NESTED);

                if (n.implementsBodyTag()) {
                    out.printin("if (");
                    out.print(tagEvalVar);
                    out
                            .println(" != javax.servlet.jsp.tagext.Tag.EVAL_BODY_INCLUDE) {");
                    // Assume EVAL_BODY_BUFFERED
                    out.pushIndent();
                    out.printil("out = _jspx_page_context.pushBody();");
                    if (n.implementsTryCatchFinally()) {
                        out.printin(tagPushBodyCountVar);
                        out.println("[0]++;");
                    } else if (pushBodyCountVar != null) {
                        out.printin(pushBodyCountVar);
                        out.println("[0]++;");
                    }
                    out.printin(tagHandlerVar);
                    out
                            .println(".setBodyContent((javax.servlet.jsp.tagext.BodyContent) out);");
                    out.printin(tagHandlerVar);
                    out.println(".doInitBody();");

                    out.popIndent();
                    out.printil("}");

                    // Synchronize AT_BEGIN and NESTED scripting variables
                    syncScriptingVars(n, VariableInfo.AT_BEGIN);
                    syncScriptingVars(n, VariableInfo.NESTED);

                } else {
                    // Synchronize NESTED scripting variables
                    syncScriptingVars(n, VariableInfo.NESTED);
                }

                if (n.implementsIterationTag()) {
                    out.printil("do {");
                    out.pushIndent();
                }
            }
            // Map the Java lines that handles start of custom tags to the
            // JSP line for this tag
            n.setEndJavaLine(out.getJavaLine());
        }