ProgramParser.java 文件源码

private OperatorNode<ExpressionOperator> readValues(List<Field_defContext> fieldDefs, Scope scope) {
    List<String> fieldNames;
    List<OperatorNode<ExpressionOperator>> fieldValues;
    int numPairs = fieldDefs.size();
    fieldNames = Lists.newArrayListWithExpectedSize(numPairs);
    fieldValues = Lists.newArrayListWithExpectedSize(numPairs);
    for (int j = 0; j < numPairs; j++) {
        ParseTree startNode = fieldDefs.get(j);
        while (startNode.getChildCount() < 3) {
            startNode = startNode.getChild(0);
        }
        fieldNames.add((String) convertExpr(startNode.getChild(0), scope).getArgument(1));
        fieldValues.add(convertExpr(startNode.getChild(2), scope));
    }
    return OperatorNode.create(ExpressionOperator.MAP, fieldNames, fieldValues);
}