/// <summary>
/// Parse the AST constant node and return Object value.
/// </summary>
/// <param name="node">parse node for which to parse the string value</param>
/// <returns>value matching AST node type</returns>
public static Object Parse(IParseTree node)
{
if (node is ITerminalNode)
{
var terminal = (ITerminalNode)node;
switch (terminal.Symbol.Type)
{
case EsperEPL2GrammarParser.BOOLEAN_TRUE: return(BoolValue.ParseString(terminal.GetText()));
case EsperEPL2GrammarParser.BOOLEAN_FALSE: return(BoolValue.ParseString(terminal.GetText()));
case EsperEPL2GrammarParser.VALUE_NULL: return(null);
default:
throw ASTWalkException.From("Encountered unexpected constant type " + terminal.Symbol.Type, terminal.Symbol);
}
}
else
{
var ruleNode = (IRuleNode)node;
var ruleIndex = ruleNode.RuleContext.RuleIndex;
if (ruleIndex == EsperEPL2GrammarParser.RULE_number)
{
return(ParseNumber(ruleNode, 1));
}
else if (ruleIndex == EsperEPL2GrammarParser.RULE_numberconstant)
{
var number = FindChildRuleByType(ruleNode, EsperEPL2GrammarParser.RULE_number);
if (ruleNode.ChildCount > 1)
{
if (ASTUtil.IsTerminatedOfType(ruleNode.GetChild(0), EsperEPL2GrammarLexer.MINUS))
{
return(ParseNumber(number, -1));
}
return(ParseNumber(number, 1));
}
else
{
return(ParseNumber(number, 1));
}
}
else if (ruleIndex == EsperEPL2GrammarParser.RULE_stringconstant)
{
bool requireUnescape = !IsRegexpNode(node);
return(StringValue.ParseString(node.GetText(), requireUnescape));
}
else if (ruleIndex == EsperEPL2GrammarParser.RULE_constant)
{
return(Parse(ruleNode.GetChild(0)));
}
throw ASTWalkException.From("Encountered unrecognized constant", node.GetText());
}
}
public static ExprTimePeriod TimePeriodGetExprAllParams(EsperEPL2GrammarParser.TimePeriodContext ctx, IDictionary <ITree, ExprNode> astExprNodeMap, VariableService variableService, StatementSpecRaw spec, ConfigurationInformation config)
{
var nodes = new ExprNode[8];
for (var i = 0; i < ctx.ChildCount; i++)
{
var unitRoot = ctx.GetChild(i);
ExprNode valueExpr;
if (ASTUtil.IsTerminatedOfType(unitRoot.GetChild(0), EsperEPL2GrammarLexer.IDENT))
{
var ident = unitRoot.GetChild(0).GetText();
valueExpr = ASTExprHelper.ResolvePropertyOrVariableIdentifier(ident, variableService, spec);
}
else
{
var @ref = new Atomic <ExprNode>();
ExprAction action = (exprNode, astExprNodeMapX, nodeX) => {
astExprNodeMapX.Remove(nodeX);
@ref.Set(exprNode);
};
ASTExprHelper.RecursiveFindRemoveChildExprNode(unitRoot.GetChild(0), astExprNodeMap, action);
valueExpr = @ref.Get();
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_millisecondPart)
{
nodes[7] = valueExpr;
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_secondPart)
{
nodes[6] = valueExpr;
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_minutePart)
{
nodes[5] = valueExpr;
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_hourPart)
{
nodes[4] = valueExpr;
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_dayPart)
{
nodes[3] = valueExpr;
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_weekPart)
{
nodes[2] = valueExpr;
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_monthPart)
{
nodes[1] = valueExpr;
}
if (ASTUtil.GetRuleIndexIfProvided(unitRoot) == EsperEPL2GrammarParser.RULE_yearPart)
{
nodes[0] = valueExpr;
}
}
ExprTimePeriod timeNode = new ExprTimePeriodImpl(config.EngineDefaults.ExpressionConfig.TimeZone,
nodes[0] != null, nodes[1] != null, nodes[2] != null, nodes[3] != null, nodes[4] != null, nodes[5] != null, nodes[6] != null, nodes[7] != null);
if (nodes[0] != null)
{
timeNode.AddChildNode(nodes[0]);
}
if (nodes[1] != null)
{
timeNode.AddChildNode(nodes[1]);
}
if (nodes[2] != null)
{
timeNode.AddChildNode(nodes[2]);
}
if (nodes[3] != null)
{
timeNode.AddChildNode(nodes[3]);
}
if (nodes[4] != null)
{
timeNode.AddChildNode(nodes[4]);
}
if (nodes[5] != null)
{
timeNode.AddChildNode(nodes[5]);
}
if (nodes[6] != null)
{
timeNode.AddChildNode(nodes[6]);
}
if (nodes[7] != null)
{
timeNode.AddChildNode(nodes[7]);
}
return(timeNode);
}