/// <summary>
/// Default-ctor to build a negation filter on the given filter
/// </summary>
public RDFBooleanNotFilter(RDFFilter filter) {
if (filter != null) {
this.Filter = filter;
this.FilterID = RDFModelUtilities.CreateHash(this.ToString());
}
else {
throw new RDFQueryException("Cannot create RDFBooleanNotFilter because \"filter\" parameter is null.");
}
}
/// <summary>
/// Default-ctor to build an "AND" filter on the given filters
/// </summary>
public RDFBooleanAndFilter(RDFFilter leftFilter, RDFFilter rightFilter) {
if (leftFilter != null) {
if(rightFilter != null) {
this.LeftFilter = leftFilter;
this.RightFilter = rightFilter;
this.FilterID = RDFModelUtilities.CreateHash(this.ToString());
}
else {
throw new RDFQueryException("Cannot create RDFBooleanAndFilter because \"rightFilter\" parameter is null.");
}
}
else {
throw new RDFQueryException("Cannot create RDFBooleanAndFilter because \"leftFilter\" parameter is null.");
}
}
private RDFSelectQuery BuildSelectAllQuery(RDFFilter filter = null)
{
var query = new RDFSelectQuery();
var x = new RDFVariable("x");
var y = new RDFVariable("y");
var z = new RDFVariable("z");
var patternGroup = new RDFPatternGroup("PatternGroup1").AddPattern(new RDFPattern(x, y, z));
if (filter != null)
{
patternGroup.AddFilter(filter);
}
query.AddPatternGroup(patternGroup)
.AddProjectionVariable(x)
.AddProjectionVariable(y)
.AddProjectionVariable(z);
return(query);
}
