Bug 1193553

Created attachment 992740 [details]
reproducer web app

Description of problem:
Accessing JSP with JDK8 specific code (namely lambda expressions) fails due compilation error

Version-Release number of selected component (if applicable): EAP 6.4.0


How reproducible:
always

Steps to Reproduce:
1. Deploy web app with jsp containing lambda expressions (you can use attached app)
2. Visit the jsp from URL (http://localhost:8080/lambda-expression-test/jsp-with-lambdas.jsp)


Actual results: JSP failed to compile, see [1]

Expected results: JSP was compiled and properly evaluated

Additional info:
I have tried changing source-vm and target-vm in /subsystem=web/configuration=jsp-configuration to 1.8 and it didn't help, by looking to code (org.apache.jasper.compiler.JDTCompiler) it seems that only version till 1.7 can be set.


[1]
org.apache.jasper.JasperException: JBWEB004062: Unable to compile class for JSP: 

JBWEB004060: An error occurred at line: 10 in the jsp file: /jsp-with-lambdas.jsp
n cannot be resolved to a variable
7: //    System.out.println(answerToEverything);
8: 
9:     List<Integer> list = Arrays.asList(1, 2, 3);
10:     Arrays.asList(1).forEach(n-> System.out.println(n));
11: 
12:     list.forEach(n -> response.getWriter().write("<p>" + n + "</p>"));
13: 


JBWEB004060: An error occurred at line: 10 in the jsp file: /jsp-with-lambdas.jsp
Syntax error on token "-", -- expected
7: //    System.out.println(answerToEverything);
8: 
9:     List<Integer> list = Arrays.asList(1, 2, 3);
10:     Arrays.asList(1).forEach(n-> System.out.println(n));
11: 
12:     list.forEach(n -> response.getWriter().write("<p>" + n + "</p>"));
13: 


JBWEB004060: An error occurred at line: 10 in the jsp file: /jsp-with-lambdas.jsp
n cannot be resolved to a variable
7: //    System.out.println(answerToEverything);
8: 
9:     List<Integer> list = Arrays.asList(1, 2, 3);
10:     Arrays.asList(1).forEach(n-> System.out.println(n));
11: 
12:     list.forEach(n -> response.getWriter().write("<p>" + n + "</p>"));
13: 


JBWEB004060: An error occurred at line: 12 in the jsp file: /jsp-with-lambdas.jsp
n cannot be resolved to a variable
9:     List<Integer> list = Arrays.asList(1, 2, 3);
10:     Arrays.asList(1).forEach(n-> System.out.println(n));
11: 
12:     list.forEach(n -> response.getWriter().write("<p>" + n + "</p>"));
13: 
14: %>
15: </body>


JBWEB004060: An error occurred at line: 12 in the jsp file: /jsp-with-lambdas.jsp
Syntax error on token "-", -- expected
9:     List<Integer> list = Arrays.asList(1, 2, 3);
10:     Arrays.asList(1).forEach(n-> System.out.println(n));
11: 
12:     list.forEach(n -> response.getWriter().write("<p>" + n + "</p>"));
13: 
14: %>
15: </body>


JBWEB004060: An error occurred at line: 12 in the jsp file: /jsp-with-lambdas.jsp
n cannot be resolved to a variable
9:     List<Integer> list = Arrays.asList(1, 2, 3);
10:     Arrays.asList(1).forEach(n-> System.out.println(n));
11: 
12:     list.forEach(n -> response.getWriter().write("<p>" + n + "</p>"));
13: 
14: %>
15: </body>


JBWEB004211: Stacktrace:
	org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:85)
	org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:69)
	org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:461)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:361)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:339)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:326)
	org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:606)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:308)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:309)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:242)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:847)