Method pigBagToJS

src/org/apache/pig/scripting/js/JsFunction.java:306–320

converts a bag to javascript object based on a schema @param bag the bag to convert @param schema the schema to use for conversion @param depth call depth used for debugging messages @return the resulting javascript object @throws FrontendException @throws ExecException

(DataBag bag, Schema schema, int depth)

     * @throws ExecException
     */
    private Scriptable pigBagToJS(DataBag bag, Schema schema, int depth) throws FrontendException, ExecException {
        debugConvertPigToJS(depth, "Bag", bag, schema);
        if (schema.size() == 1 && schema.getField(0).type == DataType.TUPLE) {
            // unwrapping as bags always contain a tuple
            schema = schema.getField(0).schema;
        }
        Scriptable array = jsScriptEngine.jsNewArray(bag.size());
        array.setParentScope(jsScriptEngine.getScope());
        int i= 0;
        for (Tuple t : bag) {
            array.put(i++, array, pigTupleToJS(t, schema, depth + 1));
        }
        debugReturn(depth, array);
        return array;
    }

    /////////////////////////
    // Conversion JS to Pig