static void Try(string input)
{
var str = new AntlrInputStream(input);
System.Console.WriteLine(input);
var lexer = new FilterLexer(str);
var tokens = new CommonTokenStream(lexer);
var parser = new FilterParser(tokens);
var listener_lexer = new ErrorListener <int>();
var listener_parser = new ErrorListener <IToken>();
lexer.AddErrorListener(listener_lexer);
parser.AddErrorListener(listener_parser);
var tree = parser.booleanAndExpression();
if (listener_lexer.had_error || listener_parser.had_error)
{
System.Console.WriteLine("error in parse.");
}
else
{
System.Console.WriteLine("parse completed.");
}
foreach (var t in tokens.GetTokens())
{
System.Console.WriteLine(t);
}
System.Console.WriteLine(TreeOutput.OutputTree(tree, lexer, parser, tokens));
}
/// <summary>
/// Create expression from string
/// </summary>
public FilterExpression(string filterStatement)
{
// Parse
var lexer = new FilterLexer(new AntlrInputStream(filterStatement));
lexer.RemoveErrorListeners();
lexer.AddErrorListener(new RaiseException <int>());
var parser = new FilterParser(new CommonTokenStream(lexer));
parser.RemoveErrorListeners();
parser.AddErrorListener(new RaiseException <IToken>());
var context = parser.parse();
// Fill in select and where clause
SelectClause = new SimpleAttributeOperandCollection();
WhereClause = new ContentFilter();
if (context.selectList().STAR() != null)
{
// Select all / default
}
else
{
foreach (var expr in context.selectList().selectexpr())
{
expr.attr_op().GetText();
var nodeId = expr.attr_op().nodeId().STRING_LITERAL().GetText();
var browsePathElems = expr.attr_op().nodeId().browsePathElement();
var attributeId = Enum.Parse <NodeAttribute>(expr.attr_op().attributeId().GetText(), true);
var operand = new SimpleAttributeOperand {
// TypeDefinitionId = expr.attr_op()
// AttributeId = (field.InstanceDeclaration.NodeClass == NodeClass.Object) ? Attributes.NodeId : Attributes.Value,
// BrowsePath = field.InstanceDeclaration.BrowsePath
};
SelectClause.Add(operand);
}
}
Evaluate(context.elem_op());
}
