public void Handle(QueryParser parser, QueryTokenizer tokenizer, Query query)
{
if (tokenizer.Type == QueryTokenizer.TokenType.StatementTerminator)
{
if (CurrentTermGroup.stackCount > 2)
{
ReportPattern(query);
SucceedingPatternTermsAreNotRequired();
}
}
else if (tokenizer.Type == QueryTokenizer.TokenType.ValueDelimiter)
{
ReportPatternRetainSubjectAndPredicate(query);
SucceedingPatternTermsAreNotRequired();
}
else if (tokenizer.Type == QueryTokenizer.TokenType.PredicateDelimiter)
{
ReportPatternRetainSubject(query);
SucceedingPatternTermsAreNotRequired();
}
else if (tokenizer.Type == QueryTokenizer.TokenType.LiteralLanguage)
{
PatternTerm member = CurrentTermGroup.popGraphMember();
CurrentTermGroup.pushGraphMember(new PlainLiteral(member.GetLabel(), tokenizer.TokenText));
}
else if (tokenizer.Type == QueryTokenizer.TokenType.LiteralDatatype)
{
PatternTerm member = CurrentTermGroup.popGraphMember();
CurrentTermGroup.pushGraphMember(new TypedLiteral(member.GetLabel(), tokenizer.TokenText));
}
else if (tokenizer.Type == QueryTokenizer.TokenType.KeywordFilter)
{
EndTermGroup(query);
ParseFilter(tokenizer, PatternGroup);
StartTermGroup( );
}
else if (tokenizer.Type == QueryTokenizer.TokenType.BeginGeneratedBlankNode)
{
BlankNode node = new BlankNode();
CurrentTermGroup.pushGraphMember(node);
StartBlankNodeGroup();
CurrentTermGroup.pushGraphMember(node);
}
else if (tokenizer.Type == QueryTokenizer.TokenType.EndGeneratedBlankNode)
{
EndTermGroup(query);
}
else
{
PatternTerm subjectMember = parser.ParseTokenToMember(query);
CurrentTermGroup.pushGraphMember(subjectMember);
SucceedingPatternTermsAreRequired();
}
}
public void ReportPatternRetainSubject(Query query)
{
PatternTerm valueMember = CurrentTermGroup.popGraphMember();
PatternTerm predicateMember = CurrentTermGroup.popGraphMember();
PatternTerm subjectMember = CurrentTermGroup.popGraphMember();
Pattern pattern = new Pattern(subjectMember, predicateMember, valueMember);
PatternGroup.AddPattern(pattern);
CurrentTermGroup.pushGraphMember(subjectMember);
}
public void ReportPattern(Query query)
{
if (Explain)
{
Console.WriteLine("Reporting a new pattern");
}
PatternTerm valueMember = CurrentTermGroup.popGraphMember();
PatternTerm predicateMember = CurrentTermGroup.popGraphMember();
PatternTerm subjectMember = CurrentTermGroup.popGraphMember();
Pattern pattern = new Pattern(subjectMember, predicateMember, valueMember);
if (Explain)
{
Console.WriteLine("Pattern is " + pattern);
}
PatternGroup.AddPattern(pattern);
}