/// <summary>
/// Prints the string representation of a pattern group
/// </summary>
internal static String PrintPatternGroup(RDFPatternGroup patternGroup, Int32 spaceIndent, Boolean skipOptional, List <RDFNamespace> prefixes)
{
String spaces = new StringBuilder().Append(' ', spaceIndent < 0 ? 0 : spaceIndent).ToString();
#region HEADER
StringBuilder result = new StringBuilder();
if (patternGroup.IsOptional && !skipOptional)
{
result.Append(" " + spaces + "OPTIONAL {\n");
spaces = spaces + " ";
}
result.Append(spaces + " {\n");
#endregion
#region MEMBERS
Boolean printingUnion = false;
List <RDFPatternGroupMember> evaluablePGMembers = patternGroup.GetEvaluablePatternGroupMembers().ToList();
RDFPatternGroupMember lastPGMember = evaluablePGMembers.LastOrDefault();
foreach (var pgMember in evaluablePGMembers)
{
#region PATTERNS
if (pgMember is RDFPattern)
{
//Union pattern
if (((RDFPattern)pgMember).JoinAsUnion)
{
if (!pgMember.Equals(lastPGMember))
{
//Begin a new Union block
printingUnion = true;
result.Append(spaces + " { " + PrintPattern((RDFPattern)pgMember, prefixes) + " }\n" + spaces + " UNION\n");
}
else
{
//End the Union block
if (printingUnion)
{
printingUnion = false;
result.Append(spaces + " { " + PrintPattern((RDFPattern)pgMember, prefixes) + " }\n");
}
else
{
result.Append(spaces + " " + PrintPattern((RDFPattern)pgMember, prefixes) + " .\n");
}
}
}
//Intersect pattern
else
{
//End the Union block
if (printingUnion)
{
printingUnion = false;
result.Append(spaces + " { " + PrintPattern((RDFPattern)pgMember, prefixes) + " }\n");
}
else
{
result.Append(spaces + " " + PrintPattern((RDFPattern)pgMember, prefixes) + " .\n");
}
}
}
#endregion
#region PROPERTY PATHS
else if (pgMember is RDFPropertyPath && pgMember.IsEvaluable)
{
//End the Union block
if (printingUnion)
{
printingUnion = false;
result.Append(spaces + " { " + PrintPropertyPath((RDFPropertyPath)pgMember, prefixes) + " }\n");
}
else
{
result.Append(spaces + " " + PrintPropertyPath((RDFPropertyPath)pgMember, prefixes) + " .\n");
}
}
#endregion
}
#endregion
#region FILTERS
patternGroup.GroupMembers.Where(m => m is RDFFilter)
.ToList()
.ForEach(f => result.Append(spaces + " " + ((RDFFilter)f).ToString(prefixes) + " \n"));
#endregion
#region FOOTER
result.Append(spaces + " }\n");
if (patternGroup.IsOptional && !skipOptional)
{
result.Append(spaces + "}\n");
}
#endregion
return(result.ToString());
}
internal String ToString(Int32 spaceIndent, List <RDFNamespace> prefixes)
{
String spaces = new StringBuilder().Append(' ', spaceIndent < 0 ? 0 : spaceIndent).ToString();
#region HEADER
StringBuilder patternGroup = new StringBuilder();
if (this.IsOptional)
{
patternGroup.Append(" " + spaces + "OPTIONAL\n");
patternGroup.Append(" " + spaces + "{\n");
spaces = spaces + " ";
}
patternGroup.Append(" " + spaces + "#" + this.PatternGroupName + "\n");
patternGroup.Append(spaces + " {\n");
#endregion
#region EVALUABLEMEMBERS
Boolean printingUnion = false;
RDFPatternGroupMember last = this.GetEvaluablePatternGroupMembers().LastOrDefault();
this.GetEvaluablePatternGroupMembers().ToList().ForEach(pgm =>
{
#region PATTERNS
if (pgm is RDFPattern)
{
//Union pattern
if (((RDFPattern)pgm).JoinAsUnion)
{
if (!pgm.Equals(last))
{
//Begin a new Union block
printingUnion = true;
patternGroup.Append(spaces + " { " + ((RDFPattern)pgm).ToString(prefixes) + " }\n" + spaces + " UNION\n");
}
else
{
//End the Union block
if (printingUnion)
{
printingUnion = false;
patternGroup.Append(spaces + " { " + ((RDFPattern)pgm).ToString(prefixes) + " }\n");
}
else
{
patternGroup.Append(spaces + " " + ((RDFPattern)pgm).ToString(prefixes) + " .\n");
}
}
}
//Intersect pattern
else
{
//End the Union block
if (printingUnion)
{
printingUnion = false;
patternGroup.Append(spaces + " { " + ((RDFPattern)pgm).ToString(prefixes) + " }\n");
}
else
{
patternGroup.Append(spaces + " " + ((RDFPattern)pgm).ToString(prefixes) + " .\n");
}
}
}
#endregion
#region PROPERTY PATHS
else if (pgm is RDFPropertyPath && pgm.IsEvaluable)
{
//End the Union block
if (printingUnion)
{
printingUnion = false;
patternGroup.Append(spaces + " { " + ((RDFPropertyPath)pgm).ToString(prefixes) + " }\n");
}
else
{
patternGroup.Append(spaces + " " + ((RDFPropertyPath)pgm).ToString(prefixes) + " .\n");
}
}
#endregion
});
#endregion
#region FILTERS
this.GroupMembers.Where(m => m is RDFFilter)
.ToList()
.ForEach(f => patternGroup.Append(spaces + " " + ((RDFFilter)f).ToString(prefixes) + " \n"));
#endregion
#region FOOTER
patternGroup.Append(spaces + " }\n");
if (this.IsOptional)
{
patternGroup.Append(spaces + "}\n");
}
#endregion
return(patternGroup.ToString());
}