ASTLibFunctionHelper.java 文件源码

public static List<ExprNode> getExprNodesLibFunc(EsperEPL2GrammarParser.LibFunctionArgsContext ctx, Map<Tree, ExprNode> astExprNodeMap) {
    if (ctx == null) {
        return Collections.emptyList();
    }
    List<EsperEPL2GrammarParser.LibFunctionArgItemContext> args = ctx.libFunctionArgItem();
    if (args == null || args.isEmpty()) {
        return Collections.emptyList();
    }
    List<ExprNode> parameters = new ArrayList<ExprNode>(args.size());
    for (EsperEPL2GrammarParser.LibFunctionArgItemContext arg : args) {
        if (arg.expressionLambdaDecl() != null) {
            List<String> lambdaparams = getLambdaGoesParams(arg.expressionLambdaDecl());
            ExprLambdaGoesNode goes = new ExprLambdaGoesNode(lambdaparams);
            ExprNode lambdaExpr = ASTExprHelper.exprCollectSubNodes(arg.expressionWithNamed(), 0, astExprNodeMap).get(0);
            goes.addChildNode(lambdaExpr);
            parameters.add(goes);
        } else {
            ExprNode parameter = ASTExprHelper.exprCollectSubNodes(arg.expressionWithNamed(), 0, astExprNodeMap).get(0);
            parameters.add(parameter);
        }
    }
    return parameters;
}