Incorrect each function signature validation

[sergeevik]

jsonata-java version 0.9.9

Example:
json: empty {}
jsonata expression: [] ~> $each(?, function($v) { $v })

expected result: empty
actual result: com.dashjoin.jsonata.JException: Argument "1" of Object "each" does not match Object signature

details from debug:
functionName: each
badSig: af
partialPattern: ^[om]?
badArgs:
0 - Utils@JList
1 - ParserSymbol

to reproduce the bug use simple test:
@Test public void testEach() { var expression = Jsonata.jsonata("[] ~> $each(?, function($v) { $v })"); expression.evaluate("{}"); }
On https://try.jsonata.org/ example work correct, return ** no match **

[sergeevik]

some debug, maybe i found place with difference
method partialApplyNativeFunction

when jsonata-js create function with empty body and add ast.body = native function, this signature is null and not verify later

in jsonata-java native function write inline. after parse ast it's have signate wich verify later and throw Exception

now bodyAST.body required Symbol class, but _native function is JFunction

[sergeevik]

@aeberhart fix it. local all test success. please check pr #80