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EL 3.0 doesn't behave in Glassfish 4 the same way as the standalone API

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marcelocenerine
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Joined: 2010-02-12
Points: 0

Hello,

I'm experimenting the new features of Expression Language 3.0, both in JSP and using the standalone API. I noticed that some of the new stuff are not behaving the same way in both places:

1- According to item 1.22 of EL spec, "A static field or static method of a Javaclass can be referenced with the syntax classname.field, such as Boolean.TRUE".
Doing so in the standalone API, it works as expected:

ELProcessor elp = new ELProcessor();
Object ret = elp.eval("Boolean.TRUE");
System.out.println("Output Value: " + ret);

Resulting: "Output Value: true"

or...

ELProcessor elp = new ELProcessor();
Object ret = elp.eval("(x -> Math.sqrt(x))(9)");
System.out.println("Output Value: " + ret);

prints: 9.0

However, when doing the same thing in JSP, nothing is printed:

${Boolean.TRUE}
${Integer.MAX_VALUE}
${Boolean.TRUE == true} // prints 'false'
${(x -> Math.sqrt(x))(9)}

2 - According to item 1.22.3 of EL spec, "A class name reference, followed by arguments in parenthesis, such as Boolean(true) denotes the invocation of the constructor of the class with the supplied arguments."
Doing so using the standalone API:

ELProcessor elp = new ELProcessor();
Object ret = elp.eval("StringBuilder('Java EE rocks')");
System.out.println("Output Value: " + ret);

Prints: Output Value: Java EE rocks

But, in JSP:

${StringBuilder('Java EE rocks')}

Results:


exception
org.apache.jasper.JasperException: javax.el.ELException: Expression uses functions, but no FunctionMapper was provided root cause

javax.el.ELException: Expression uses functions, but no FunctionMapper was provided

These expressions I have mentioned above wouldn't be supposed to work the same way in JSP and in the standalone API?

Thanks in advance.

Marcelo

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marcelocenerine
Offline
Joined: 2010-02-12
Points: 0