swim.structure polyglot language bindings

[c9r]

Flesh out polyglot language bindings for the swim-structure Java library. The bindings are located in the swim-dynamic-structure Java library. The JavaScript bindings should be compatible with the @swim/structure TypeScript library. Make sure to bind static methods, in addition to instance methods.

Structure bindings

• Add Item bindings.
• Add Field bindings.
• Add Attr bindings.
• Add Slot bindings.
• Add Value bindings
• Add Record bindings
• Add Data bindings.
• Add Text bindings.
• Add Num bindings.
• Add Bool bindings.
• Add Extant bindings.
• Add Absent bindings.

Expression bindings

• Add Expression bindings.
• Add Operator bindings.
• Add Selector bindings.
• Add Func bindings.
• Add Interpreter bindings.

Form bindings

• Add Form bindings.

[ajay-gov]

Item 1 is a Slot. This should work I think but maybe this is not what you want to do?
assertEquals(context.eval("js", "record.getItem(1).stringValue().asString()"), "number"); assertEquals(context.eval("js", "record.getItem(1).key.numberValue()").asInt(), 78);

[freyadyu]

Hey Chris,

I committed my code with HostItem.java and ItemTypeSpec.java. I converted all methods in Item.java with corresponding functionalities in Item.ts, but I listed some left over questions I had while developing, we can sync when you in the office. At the meantime, I'll keep working on the rest of the list:

• In Item.ts, there're only stringValue(), numberValue(), and booleanValue(). But in Item.java, besides those three methods, there're byteValue(), shortValue(), intValue(), longValue(), floatValue(), doubleValue(), integerValue(), charValue(). I added those in HostItem.java, but not sure whether I should keep them there cause there's no corresponding method in Item.ts.

• If we want to keep those method in HostItem, I also met a problem while writing test case with integerValue(), need your instruction.

• Met problem with writing HostLambda test case

• For HostItemFilter, HostItemEvaluate, HostItemSubstitute, they involved with Selector and Interpreter bindings, need your instruction

• For HostItemCast, HostItemCoerce, HostItemDisplay, HostItemDebug, HostItemGlobalScope need your instruction for test case

• For HostItemFromObject test case, I met question with test case that fromObject() takes map as parameter with following error exception:
  Map<String, String> map = new HashMap<>();
  map.put("foo", "bar");
  bindings.putMember("mapOb", bridge.hostToGuest(Item.fromObject(map)));
  assertEquals(bridge.guestToHost(context.eval("js", "mapOb")), Slot.of("foo", "bar"));

  error:
    swim.dynamic.structure.ItemTypeSpec > testFromObject FAILED
    java.lang.IllegalArgumentException: {foo=bar}
    	at swim.structure/swim.structure.Value.fromObject(Value.java:1049)
    	at swim.structure/swim.structure.Item.fromObject(Item.java:943)
    	at swim.dynamic.structure/	 
      swim.dynamic.structure.ItemTypeSpec.testFromObject(ItemTypeSpec.java:87)
  

• assertEqual case failed for HostItemToString