public void ShouldAllowUsingISparqlExpressionForFilter()
{
// given
ISparqlExpression expression = new IsIriFunction(new VariableTerm("x"));
_builder.Filter(expression);
// when
GraphPattern graphPattern = _builder.BuildGraphPattern(_namespaceMapper.Object);
// then
Assert.True(graphPattern.IsFiltered);
Assert.Same(expression, graphPattern.Filter.Expression);
}
/// <summary>
/// Creates a call of the EXISTS function
/// </summary>
/// <param name="eb"></param>
/// <param name="buildExistsPattern">a function, which will create the graph pattern parameter</param>
public static BooleanExpression Exists(this ExpressionBuilder eb, Action <IGraphPatternBuilder> buildExistsPattern)
{
GraphPatternBuilder builder = new GraphPatternBuilder();
buildExistsPattern(builder);
var existsFunction = new ExistsFunction(builder.BuildGraphPattern(eb.Prefixes), true);
return(new BooleanExpression(existsFunction));
}
protected override SparqlQuery BuildQuery(SparqlQuery query)
{
query.ConstructTemplate = _builder.BuildGraphPattern(Prefixes);
return(base.BuildQuery(query));
}
public GraphPattern BuildGraphPattern(INamespaceMapper prefixes)
{
return(_builder.BuildGraphPattern(prefixes));
}