/// <summary>
/// Apply the filters of the given pattern group to its result table
/// </summary>
internal static void ApplyFilters(RDFDescribeQuery query, RDFPatternGroup patternGroup) {
if (patternGroup.Patterns.Any() && patternGroup.Filters.Any()) {
DataTable filteredTable = query.PatternGroupResultTables[patternGroup].Clone();
IEnumerator rowsEnum = query.PatternGroupResultTables[patternGroup].Rows.GetEnumerator();
//Iterate the rows of the pattern group's result table
Boolean keepRow = false;
while (rowsEnum.MoveNext()) {
//Apply the pattern group's filters on the row
keepRow = true;
IEnumerator<RDFFilter> filtersEnum = patternGroup.Filters.GetEnumerator();
while (keepRow && filtersEnum.MoveNext()) {
keepRow = filtersEnum.Current.ApplyFilter((DataRow)rowsEnum.Current, false);
}
//If the row has passed all the filters, keep it in the filtered result table
if (keepRow) {
DataRow newRow = filteredTable.NewRow();
newRow.ItemArray = ((DataRow)rowsEnum.Current).ItemArray;
filteredTable.Rows.Add(newRow);
}
}
//Save the result datatable
query.PatternGroupResultTables[patternGroup] = filteredTable;
}
}
/// <summary>
/// Apply the filters of the given pattern group to its result table
/// </summary>
internal static void ApplyFilters(RDFDescribeQuery query, RDFPatternGroup patternGroup)
{
if (patternGroup.Patterns.Any() && patternGroup.Filters.Any())
{
DataTable filteredTable = query.PatternGroupResultTables[patternGroup].Clone();
IEnumerator rowsEnum = query.PatternGroupResultTables[patternGroup].Rows.GetEnumerator();
//Iterate the rows of the pattern group's result table
Boolean keepRow = false;
while (rowsEnum.MoveNext())
{
//Apply the pattern group's filters on the row
keepRow = true;
IEnumerator <RDFFilter> filtersEnum = patternGroup.Filters.GetEnumerator();
while (keepRow && filtersEnum.MoveNext())
{
keepRow = filtersEnum.Current.ApplyFilter((DataRow)rowsEnum.Current, false);
}
//If the row has passed all the filters, keep it in the filtered result table
if (keepRow)
{
DataRow newRow = filteredTable.NewRow();
newRow.ItemArray = ((DataRow)rowsEnum.Current).ItemArray;
filteredTable.Rows.Add(newRow);
}
}
//Save the result datatable
query.PatternGroupResultTables[patternGroup] = filteredTable;
}
}
/// <summary>
/// Get the result table of the given pattern group
/// </summary>
internal static void CombinePatterns(RDFDescribeQuery query, RDFPatternGroup patternGroup)
{
if (patternGroup.Patterns.Any())
{
//Populate pattern group result table
DataTable patternGroupResultTable = RDFQueryEngine.CombineTables(query.PatternResultTables[patternGroup], false);
//Add it to the list of pattern group result tables
query.PatternGroupResultTables.Add(patternGroup, patternGroupResultTable);
//Populate its metadata
query.PatternGroupResultTables[patternGroup].TableName = patternGroup.ToString();
if (!query.PatternGroupResultTables[patternGroup].ExtendedProperties.ContainsKey("IsOptional"))
{
query.PatternGroupResultTables[patternGroup].ExtendedProperties.Add("IsOptional", patternGroup.IsOptional);
}
else
{
query.PatternGroupResultTables[patternGroup].ExtendedProperties["IsOptional"] = patternGroup.IsOptional;
}
if (!query.PatternGroupResultTables[patternGroup].ExtendedProperties.ContainsKey("JoinAsUnion"))
{
query.PatternGroupResultTables[patternGroup].ExtendedProperties.Add("JoinAsUnion", patternGroup.JoinAsUnion);
}
else
{
query.PatternGroupResultTables[patternGroup].ExtendedProperties["JoinAsUnion"] = patternGroup.JoinAsUnion;
}
}
}
/// <summary>
/// Apply the query modifiers to the query result table
/// </summary>
internal static DataTable ApplyModifiers(RDFDescribeQuery query, DataTable table)
{
String tablenameBak = table.TableName;
//Apply the DISTINCT modifier
table = new RDFDistinctModifier().ApplyModifier(table);
//Apply the OFFSET modifier
table = query.Modifiers.Where(m => m is RDFOffsetModifier)
.Aggregate(table, (current, modifier) => modifier.ApplyModifier(current));
//Apply the LIMIT modifier
table = query.Modifiers.Where(m => m is RDFLimitModifier)
.Aggregate(table, (current, modifier) => modifier.ApplyModifier(current));
table.TableName = tablenameBak;
return(table);
}
/// <summary>
/// Get the intermediate result tables of the given pattern group
/// </summary>
internal static void EvaluatePatterns(RDFDescribeQuery query, RDFPatternGroup patternGroup, Object graphOrStore) {
query.PatternResultTables[patternGroup] = new List<DataTable>();
//Iterate over the patterns of the pattern group
foreach (RDFPattern pattern in patternGroup.Patterns) {
//Apply the pattern to the graph/store
DataTable patternResultsTable = graphOrStore is RDFGraph ? RDFQueryEngine.ApplyPattern(pattern, (RDFGraph)graphOrStore)
: RDFQueryEngine.ApplyPattern(pattern, (RDFStore)graphOrStore);
//Set the name and the optionality metadata of the result datatable
patternResultsTable.TableName = pattern.ToString();
patternResultsTable.ExtendedProperties.Add("IsOptional", pattern.IsOptional);
patternResultsTable.ExtendedProperties.Add("JoinAsUnion", pattern.JoinAsUnion);
//Save the result datatable
query.PatternResultTables[patternGroup].Add(patternResultsTable);
}
}
/// <summary>
/// Get the intermediate result tables of the given pattern group
/// </summary>
internal static void EvaluatePatterns(RDFDescribeQuery query, RDFPatternGroup patternGroup, Object graphOrStore)
{
query.PatternResultTables[patternGroup] = new List <DataTable>();
//Iterate over the patterns of the pattern group
foreach (RDFPattern pattern in patternGroup.Patterns)
{
//Apply the pattern to the graph/store
DataTable patternResultsTable = graphOrStore is RDFGraph?RDFQueryEngine.ApplyPattern(pattern, (RDFGraph)graphOrStore)
: RDFQueryEngine.ApplyPattern(pattern, (RDFStore)graphOrStore);
//Set the name and the optionality metadata of the result datatable
patternResultsTable.TableName = pattern.ToString();
patternResultsTable.ExtendedProperties.Add("IsOptional", pattern.IsOptional);
patternResultsTable.ExtendedProperties.Add("JoinAsUnion", pattern.JoinAsUnion);
//Save the result datatable
query.PatternResultTables[patternGroup].Add(patternResultsTable);
}
}
/// <summary>
/// Apply the query modifiers to the query result table
/// </summary>
internal static DataTable ApplyModifiers(RDFDescribeQuery query, DataTable table) {
String tablenameBak = table.TableName;
//Apply the DISTINCT modifier
table = new RDFDistinctModifier().ApplyModifier(table);
//Apply the OFFSET modifier
table = query.Modifiers.Where(m => m is RDFOffsetModifier)
.Aggregate(table, (current, modifier) => modifier.ApplyModifier(current));
//Apply the LIMIT modifier
table = query.Modifiers.Where(m => m is RDFLimitModifier)
.Aggregate(table, (current, modifier) => modifier.ApplyModifier(current));
table.TableName = tablenameBak;
return table;
}
/// <summary>
/// Describes the terms of the given query with data from the given result table
/// </summary>
internal static DataTable DescribeTerms(RDFDescribeQuery describeQuery, Object graphOrStore, DataTable resultTable) {
//Create the structure of the result datatable
DataTable result = new DataTable("DESCRIBE_RESULTS");
result.Columns.Add("SUBJECT", Type.GetType("System.String"));
result.Columns.Add("PREDICATE", Type.GetType("System.String"));
result.Columns.Add("OBJECT", Type.GetType("System.String"));
result.AcceptChanges();
//Query IS empty, so does not have pattern groups to fetch data from
//(we can only proceed by searching for resources in the describe terms)
if (describeQuery.IsEmpty) {
//Iterate the describe terms of the query which are resources (variables are omitted, since useless)
foreach (RDFPatternMember dt in describeQuery.DescribeTerms.Where(dterm => dterm is RDFResource)) {
//Search on GRAPH
if (graphOrStore is RDFGraph) {
//Search as RESOURCE (S-P-O)
RDFGraph desc = ((RDFGraph)graphOrStore).SelectTriplesBySubject((RDFResource)dt)
.UnionWith(((RDFGraph)graphOrStore).SelectTriplesByPredicate((RDFResource)dt))
.UnionWith(((RDFGraph)graphOrStore).SelectTriplesByObject((RDFResource)dt));
result.Merge(desc.ToDataTable(), true, MissingSchemaAction.Add);
}
//Search on STORE
else {
//Search as RESOURCE (S-P-O)
RDFMemoryStore desc = ((RDFMemoryStore)((RDFMemoryStore)((RDFMemoryStore)((RDFStore)graphOrStore).SelectQuadruplesBySubject((RDFResource)dt))
.UnionWith(((RDFStore)graphOrStore).SelectQuadruplesByPredicate((RDFResource)dt)))
.UnionWith(((RDFStore)graphOrStore).SelectQuadruplesByObject((RDFResource)dt)));
result.Merge(desc.ToDataTable(), true, MissingSchemaAction.Add);
}
}
}
//Query IS NOT empty, so does have pattern groups to fetch data from
else {
//In case of a "Star" query, all the variables must be considered describe terms
if (describeQuery.IsStar) {
describeQuery.PatternGroups.ForEach(pg =>
pg.Variables.ForEach(v => describeQuery.AddDescribeTerm(v))
);
}
//Iterate the describe terms of the query
foreach (RDFPatternMember dt in describeQuery.DescribeTerms) {
//The describe term is a variable
if (dt is RDFVariable) {
//Process the variable
if(resultTable.Columns.Contains(dt.ToString())) {
//Iterate the results datatable's rows to retrieve terms to be described
IEnumerator rowsEnum = resultTable.Rows.GetEnumerator();
while (rowsEnum.MoveNext()) {
//Row contains a value in position of the variable corresponding to the describe term
if (!((DataRow)rowsEnum.Current).IsNull(dt.ToString())) {
//Retrieve the term to be described
RDFPatternMember term = RDFQueryUtilities.ParseRDFPatternMember(((DataRow)rowsEnum.Current)[dt.ToString()].ToString());
//Search on GRAPH
if (graphOrStore is RDFGraph) {
//Search as RESOURCE (S-P-O)
if (term is RDFResource) {
RDFGraph desc = ((RDFGraph)graphOrStore).SelectTriplesBySubject((RDFResource)term)
.UnionWith(((RDFGraph)graphOrStore).SelectTriplesByPredicate((RDFResource)term))
.UnionWith(((RDFGraph)graphOrStore).SelectTriplesByObject((RDFResource)term));
result.Merge(desc.ToDataTable(), true, MissingSchemaAction.Add);
}
//Search as LITERAL (L)
else {
RDFGraph desc = ((RDFGraph)graphOrStore).SelectTriplesByLiteral((RDFLiteral)term);
result.Merge(desc.ToDataTable(), true, MissingSchemaAction.Add);
}
}
//Search on STORE
else {
//Search as RESOURCE (S-P-O)
if (term is RDFResource) {
RDFMemoryStore desc = ((RDFMemoryStore)((RDFMemoryStore)((RDFMemoryStore)((RDFStore)graphOrStore).SelectQuadruplesBySubject((RDFResource)term))
.UnionWith(((RDFStore)graphOrStore).SelectQuadruplesByPredicate((RDFResource)term)))
.UnionWith(((RDFStore)graphOrStore).SelectQuadruplesByObject((RDFResource)term)));
result.Merge(desc.ToDataTable(), true, MissingSchemaAction.Add);
}
//Search as LITERAL (L)
else {
RDFMemoryStore desc = ((RDFMemoryStore)((RDFStore)graphOrStore).SelectQuadruplesByLiteral((RDFLiteral)term));
result.Merge(desc.ToDataTable(), true, MissingSchemaAction.Add);
}
}
}
}
}
}
//The describe term is a resource
else {
//Search on GRAPH
if (graphOrStore is RDFGraph) {
//Search as RESOURCE (S-P-O)
RDFGraph desc = ((RDFGraph)graphOrStore).SelectTriplesBySubject((RDFResource)dt)
.UnionWith(((RDFGraph)graphOrStore).SelectTriplesByPredicate((RDFResource)dt))
.UnionWith(((RDFGraph)graphOrStore).SelectTriplesByObject((RDFResource)dt));
result.Merge(desc.ToDataTable(), true, MissingSchemaAction.Add);
}
//Search on STORE
else {
//Search as RESOURCE (S-P-O)
RDFMemoryStore desc = ((RDFMemoryStore)((RDFMemoryStore)((RDFMemoryStore)((RDFStore)graphOrStore).SelectQuadruplesBySubject((RDFResource)dt))
.UnionWith(((RDFStore)graphOrStore).SelectQuadruplesByPredicate((RDFResource)dt)))
.UnionWith(((RDFStore)graphOrStore).SelectQuadruplesByObject((RDFResource)dt)));
result.Merge(desc.ToDataTable(), true, MissingSchemaAction.Add);
}
}
}
}
return result;
}
/// <summary>
/// Get the result table of the given pattern group
/// </summary>
internal static void CombinePatterns(RDFDescribeQuery query, RDFPatternGroup patternGroup) {
if (patternGroup.Patterns.Any()) {
//Populate pattern group result table
DataTable patternGroupResultTable = RDFQueryEngine.CombineTables(query.PatternResultTables[patternGroup], false);
//Add it to the list of pattern group result tables
query.PatternGroupResultTables.Add(patternGroup, patternGroupResultTable);
//Populate its metadata
query.PatternGroupResultTables[patternGroup].TableName = patternGroup.ToString();
if (!query.PatternGroupResultTables[patternGroup].ExtendedProperties.ContainsKey("IsOptional")) {
query.PatternGroupResultTables[patternGroup].ExtendedProperties.Add("IsOptional", patternGroup.IsOptional);
}
else {
query.PatternGroupResultTables[patternGroup].ExtendedProperties["IsOptional"] = patternGroup.IsOptional;
}
if (!query.PatternGroupResultTables[patternGroup].ExtendedProperties.ContainsKey("JoinAsUnion")) {
query.PatternGroupResultTables[patternGroup].ExtendedProperties.Add("JoinAsUnion", patternGroup.JoinAsUnion);
}
else {
query.PatternGroupResultTables[patternGroup].ExtendedProperties["JoinAsUnion"] = patternGroup.JoinAsUnion;
}
}
}
/// <summary>
/// Prints the string representation of a SPARQL DESCRIBE query
/// </summary>
internal static String PrintDescribeQuery(RDFDescribeQuery describeQuery)
{
StringBuilder sb = new StringBuilder();
if (describeQuery != null)
{
#region PREFIXES
if (describeQuery.Prefixes.Any())
{
describeQuery.Prefixes.ForEach(pf =>
{
sb.Append("PREFIX " + pf.NamespacePrefix + ": <" + pf.NamespaceUri + ">\n");
});
sb.Append("\n");
}
#endregion
#region HEADER
#region BEGINDESCRIBE
sb.Append("DESCRIBE");
#endregion
#region TERMS
if (describeQuery.DescribeTerms.Any())
{
describeQuery.DescribeTerms.ForEach(dt =>
{
sb.Append(" " + PrintPatternMember(dt, describeQuery.Prefixes));
});
}
else
{
sb.Append(" *");
}
sb.Append("\n");
#endregion
#endregion
#region BODY
sb.Append("WHERE {\n");
#region MEMBERS
Boolean printingUnion = false;
List <RDFQueryMember> evaluableQueryMembers = describeQuery.GetEvaluableQueryMembers().ToList();
RDFQueryMember lastQueryMbr = evaluableQueryMembers.LastOrDefault();
foreach (var queryMember in evaluableQueryMembers)
{
#region PATTERNGROUPS
if (queryMember is RDFPatternGroup)
{
//Current pattern group is set as UNION with the next one
if (((RDFPatternGroup)queryMember).JoinAsUnion)
{
//Current pattern group IS NOT the last of the query
//(so UNION keyword must be appended at last)
if (!queryMember.Equals(lastQueryMbr))
{
//Begin a new Union block
if (!printingUnion)
{
printingUnion = true;
sb.Append(" {\n");
}
sb.Append(PrintPatternGroup((RDFPatternGroup)queryMember, 2, true, describeQuery.Prefixes));
sb.Append(" UNION\n");
}
//Current pattern group IS the last of the query
//(so UNION keyword must not be appended at last)
else
{
//End the Union block
if (printingUnion)
{
printingUnion = false;
sb.Append(PrintPatternGroup((RDFPatternGroup)queryMember, 2, true, describeQuery.Prefixes));
sb.Append(" }\n");
}
else
{
sb.Append(PrintPatternGroup((RDFPatternGroup)queryMember, 0, false, describeQuery.Prefixes));
}
}
}
//Current pattern group is set as INTERSECT with the next one
else
{
//End the Union block
if (printingUnion)
{
printingUnion = false;
sb.Append(PrintPatternGroup((RDFPatternGroup)queryMember, 2, true, describeQuery.Prefixes));
sb.Append(" }\n");
}
else
{
sb.Append(PrintPatternGroup((RDFPatternGroup)queryMember, 0, false, describeQuery.Prefixes));
}
}
}
#endregion
#region SUBQUERY
else if (queryMember is RDFQuery)
{
//Merge main query prefixes
describeQuery.Prefixes.ForEach(pf1 => {
if (!((RDFSelectQuery)queryMember).Prefixes.Any(pf2 => pf2.Equals(pf1)))
{
((RDFSelectQuery)queryMember).AddPrefix(pf1);
}
});
//Current subquery is set as UNION with the next one
if (((RDFSelectQuery)queryMember).JoinAsUnion)
{
//Current subquery IS NOT the last of the query
//(so UNION keyword must be appended at last)
if (!queryMember.Equals(lastQueryMbr))
{
//Begin a new Union block
if (!printingUnion)
{
printingUnion = true;
sb.Append(" {\n");
}
sb.Append(PrintSelectQuery((RDFSelectQuery)queryMember, 1, true));
sb.Append(" UNION\n");
}
//Current query IS the last of the query
//(so UNION keyword must not be appended at last)
else
{
//End the Union block
if (printingUnion)
{
printingUnion = false;
sb.Append(PrintSelectQuery((RDFSelectQuery)queryMember, 1, true));
sb.Append(" }\n");
}
else
{
sb.Append(PrintSelectQuery((RDFSelectQuery)queryMember, 1, false));
}
}
}
//Current query is set as INTERSECT with the next one
else
{
//End the Union block
if (printingUnion)
{
printingUnion = false;
sb.Append(PrintSelectQuery((RDFSelectQuery)queryMember, 1, true));
sb.Append(" }\n");
}
else
{
sb.Append(PrintSelectQuery((RDFSelectQuery)queryMember, 1, false));
}
}
}
#endregion
}
#endregion
sb.Append("}");
#endregion
#region FOOTER
#region MODIFIERS
List <RDFModifier> modifiers = describeQuery.GetModifiers().ToList();
// LIMIT/OFFSET
if (modifiers.Any(mod => mod is RDFLimitModifier || mod is RDFOffsetModifier))
{
modifiers.Where(mod => mod is RDFLimitModifier)
.ToList()
.ForEach(lim => { sb.Append("\n"); sb.Append(lim); });
modifiers.Where(mod => mod is RDFOffsetModifier)
.ToList()
.ForEach(off => { sb.Append("\n"); sb.Append(off); });
}
#endregion
#endregion
}
return(sb.ToString());
}
/// <summary>
/// Describes the terms of the given query with data from the given result table
/// </summary>
internal static DataTable DescribeTerms(RDFDescribeQuery describeQuery, Object graphOrStore, DataTable resultTable)
{
//Create the structure of the result datatable
DataTable result = new DataTable("DESCRIBE_RESULTS");
result.Columns.Add("SUBJECT", Type.GetType("System.String"));
result.Columns.Add("PREDICATE", Type.GetType("System.String"));
result.Columns.Add("OBJECT", Type.GetType("System.String"));
result.AcceptChanges();
//Query IS empty, so does not have pattern groups to fetch data from
//(we can only proceed by searching for resources in the describe terms)
if (describeQuery.IsEmpty)
{
//Iterate the describe terms of the query which are resources (variables are omitted, since useless)
foreach (RDFPatternMember dt in describeQuery.DescribeTerms.Where(dterm => dterm is RDFResource))
{
//Search on GRAPH
if (graphOrStore is RDFGraph)
{
//Search as RESOURCE (S-P-O)
RDFGraph desc = ((RDFGraph)graphOrStore).SelectTriplesBySubject((RDFResource)dt)
.UnionWith(((RDFGraph)graphOrStore).SelectTriplesByPredicate((RDFResource)dt))
.UnionWith(((RDFGraph)graphOrStore).SelectTriplesByObject((RDFResource)dt));
result.Merge(desc.ToDataTable(), true, MissingSchemaAction.Add);
}
//Search on STORE
else
{
//Search as RESOURCE (S-P-O)
RDFMemoryStore desc = ((RDFMemoryStore)((RDFMemoryStore)((RDFMemoryStore)((RDFStore)graphOrStore).SelectQuadruplesBySubject((RDFResource)dt))
.UnionWith(((RDFStore)graphOrStore).SelectQuadruplesByPredicate((RDFResource)dt)))
.UnionWith(((RDFStore)graphOrStore).SelectQuadruplesByObject((RDFResource)dt)));
result.Merge(desc.ToDataTable(), true, MissingSchemaAction.Add);
}
}
}
//Query IS NOT empty, so does have pattern groups to fetch data from
else
{
//In case of a "Star" query, all the variables must be considered describe terms
if (describeQuery.IsStar)
{
describeQuery.PatternGroups.ForEach(pg =>
pg.Variables.ForEach(v => describeQuery.AddDescribeTerm(v))
);
}
//Iterate the describe terms of the query
foreach (RDFPatternMember dt in describeQuery.DescribeTerms)
{
//The describe term is a variable
if (dt is RDFVariable)
{
//Process the variable
if (resultTable.Columns.Contains(dt.ToString()))
{
//Iterate the results datatable's rows to retrieve terms to be described
IEnumerator rowsEnum = resultTable.Rows.GetEnumerator();
while (rowsEnum.MoveNext())
{
//Row contains a value in position of the variable corresponding to the describe term
if (!((DataRow)rowsEnum.Current).IsNull(dt.ToString()))
{
//Retrieve the term to be described
RDFPatternMember term = RDFQueryUtilities.ParseRDFPatternMember(((DataRow)rowsEnum.Current)[dt.ToString()].ToString());
//Search on GRAPH
if (graphOrStore is RDFGraph)
{
//Search as RESOURCE (S-P-O)
if (term is RDFResource)
{
RDFGraph desc = ((RDFGraph)graphOrStore).SelectTriplesBySubject((RDFResource)term)
.UnionWith(((RDFGraph)graphOrStore).SelectTriplesByPredicate((RDFResource)term))
.UnionWith(((RDFGraph)graphOrStore).SelectTriplesByObject((RDFResource)term));
result.Merge(desc.ToDataTable(), true, MissingSchemaAction.Add);
}
//Search as LITERAL (L)
else
{
RDFGraph desc = ((RDFGraph)graphOrStore).SelectTriplesByLiteral((RDFLiteral)term);
result.Merge(desc.ToDataTable(), true, MissingSchemaAction.Add);
}
}
//Search on STORE
else
{
//Search as RESOURCE (S-P-O)
if (term is RDFResource)
{
RDFMemoryStore desc = ((RDFMemoryStore)((RDFMemoryStore)((RDFMemoryStore)((RDFStore)graphOrStore).SelectQuadruplesBySubject((RDFResource)term))
.UnionWith(((RDFStore)graphOrStore).SelectQuadruplesByPredicate((RDFResource)term)))
.UnionWith(((RDFStore)graphOrStore).SelectQuadruplesByObject((RDFResource)term)));
result.Merge(desc.ToDataTable(), true, MissingSchemaAction.Add);
}
//Search as LITERAL (L)
else
{
RDFMemoryStore desc = ((RDFMemoryStore)((RDFStore)graphOrStore).SelectQuadruplesByLiteral((RDFLiteral)term));
result.Merge(desc.ToDataTable(), true, MissingSchemaAction.Add);
}
}
}
}
}
}
//The describe term is a resource
else
{
//Search on GRAPH
if (graphOrStore is RDFGraph)
{
//Search as RESOURCE (S-P-O)
RDFGraph desc = ((RDFGraph)graphOrStore).SelectTriplesBySubject((RDFResource)dt)
.UnionWith(((RDFGraph)graphOrStore).SelectTriplesByPredicate((RDFResource)dt))
.UnionWith(((RDFGraph)graphOrStore).SelectTriplesByObject((RDFResource)dt));
result.Merge(desc.ToDataTable(), true, MissingSchemaAction.Add);
}
//Search on STORE
else
{
//Search as RESOURCE (S-P-O)
RDFMemoryStore desc = ((RDFMemoryStore)((RDFMemoryStore)((RDFMemoryStore)((RDFStore)graphOrStore).SelectQuadruplesBySubject((RDFResource)dt))
.UnionWith(((RDFStore)graphOrStore).SelectQuadruplesByPredicate((RDFResource)dt)))
.UnionWith(((RDFStore)graphOrStore).SelectQuadruplesByObject((RDFResource)dt)));
result.Merge(desc.ToDataTable(), true, MissingSchemaAction.Add);
}
}
}
}
return(result);
}