ASTIndexHelper.java 文件源码

private static CreateIndexItem walk(EsperEPL2GrammarParser.CreateIndexColumnContext col, Map<Tree, ExprNode> astExprNodeMap) {
    List<ExprNode> expressions = Collections.emptyList();
    if (col.i != null) {
        expressions = ASTExprHelper.exprCollectSubNodes(col.i, 0, astExprNodeMap);
    } else if (col.expression() != null) {
        expressions = ASTExprHelper.exprCollectSubNodes(col.expression(), 0, astExprNodeMap);
    }

    String type = CreateIndexType.HASH.getNameLower();
    if (col.t != null) {
        type = col.t.getText();
    }

    List<ExprNode> parameters = Collections.<ExprNode>emptyList();
    if (col.p != null) {
        parameters = ASTExprHelper.exprCollectSubNodes(col.p, 0, astExprNodeMap);
    }
    return new CreateIndexItem(expressions, type, parameters);
}