private string Literal(Literal literal) {
#if !SILVERLIGHT
if (format == Formats.NTriples || literal.DataType == null) return literal.ToString();
if (literal.DataType == xsdInteger) return literal.ParseValue().ToString();
if (literal.DataType == xsdDouble && format == Formats.Notation3) return literal.ParseValue().ToString();
#endif
return literal.ToString();
}
private static string GetTextField(Resource value)
{
string text_field = null;
SemWeb.Literal l = value as SemWeb.Literal;
if (l != null && l.Value != null && l.Value.Length > 0)
{
text_field = l.Value;
if (Char.IsControl(l.Value [l.Value.Length - 1]))
{
text_field = l.Value.Substring(0, l.Value.Length - 1);
}
}
return(text_field);
}
public virtual string GetValue(MemoryStore store, SemWeb.Literal obj)
{
string result = obj.Value;
if (type.IsEnum)
{
try {
object o = System.Enum.Parse(type, obj.Value);
result = o.ToString();
} catch (System.Exception e) {
System.Console.WriteLine("Value \"{2}\" not found in {0}{3}{1}", type, e, result, System.Environment.NewLine);
}
}
/*
* else if (type == typeof (Rational)) {
* object o = FSpot.Tiff.Rational.Parse (obj.Value);
* }
*/
return(result);
}
public LiteralWrapper(Literal res) { r = res; }
protected override void extractLiteralFilters(name.levering.ryan.sparql.model.logic.ExpressionLogic node, java.util.Map literalFilters) {
base.extractLiteralFilters(node, literalFilters);
if (node is BinaryExpressionNode) {
BinaryExpressionNode b = (BinaryExpressionNode)node;
LiteralFilter.CompType comp;
if (node is ASTEqualsNode)
comp = LiteralFilter.CompType.EQ;
else if (node is ASTNotEqualsNode)
comp = LiteralFilter.CompType.NE;
else if (node is ASTGreaterThanNode)
comp = LiteralFilter.CompType.GT;
else if (node is ASTGreaterThanEqualsNode)
comp = LiteralFilter.CompType.GE;
else if (node is ASTLessThanNode)
comp = LiteralFilter.CompType.LT;
else if (node is ASTLessThanEqualsNode)
comp = LiteralFilter.CompType.LE;
else
return;
SparqlVariable var;
org.openrdf.model.Literal val;
object left = RemoveCast(b.getLeftExpression());
object right = RemoveCast(b.getRightExpression());
if (left is ASTVar && right is org.openrdf.model.Literal) {
var = (SparqlVariable)left;
val = (org.openrdf.model.Literal)right;
} else if (right is ASTVar && left is org.openrdf.model.Literal) {
var = (SparqlVariable)right;
val = (org.openrdf.model.Literal)left;
switch (comp) {
case LiteralFilter.CompType.LT: comp = LiteralFilter.CompType.GE; break;
case LiteralFilter.CompType.LE: comp = LiteralFilter.CompType.GT; break;
case LiteralFilter.CompType.GT: comp = LiteralFilter.CompType.LE; break;
case LiteralFilter.CompType.GE: comp = LiteralFilter.CompType.LT; break;
}
} else {
return;
}
object parsedvalue = new Literal(val.getLabel(), null, val.getDatatype() == null ? null : val.getDatatype().ToString()).ParseValue();
LiteralFilter filter = LiteralFilter.Create(comp, parsedvalue);
addLiteralFilter(var, filter, literalFilters);
}
}
public abstract bool Filter(Literal value, SelectableSource targetModel);
private void ParseProperty(Entity subject, ref int liIndex)
{
// The reader is positioned on a propert node,
// and on returning the reader is positioned past
// that node.
// Get all of the attributes before we move the reader forward.
string nodeID = xml.GetAttribute("nodeID", NS.RDF);
string resource = xml.GetAttribute("resource", NS.RDF);
string parseType = xml.GetAttribute("parseType", NS.RDF);
string datatype = xml.GetAttribute("datatype", NS.RDF);
string lang = xml.XmlLang != "" ? xml.XmlLang : null;
string predicate = CurNode();
if (predicate == NS.RDF + "li")
{
predicate = NS.RDF + "_" + (liIndex++);
}
if (IsRestrictedName(predicate))
{
OnError(xml.Name + " cannot be used as a property name");
}
if (IsDeprecatedName(predicate))
{
OnError(xml.Name + " has been deprecated and cannot be used as a property name");
}
string ID = xml.GetAttribute("ID", NS.RDF);
if (nodeID != null && !IsValidXmlName(nodeID))
{
OnWarning("'" + nodeID + "' is not a valid XML Name");
}
if (ID != null && !IsValidXmlName(ID))
{
OnWarning("'" + ID + "' is not a valid XML Name");
}
Resource objct = null;
if (nodeID != null || resource != null)
{
if (isset(nodeID) + isset(resource) > 1)
{
OnError("A predicate node cannot specify more than one of rdf:nodeID and rdf:resource");
}
if (parseType != null || datatype != null)
{
OnError("The attributes rdf:parseType and rdf:datatype are not valid on a predicate with a rdf:nodeID or rdf:resource attribute");
}
// Object is an entity given by nodeID or resource.
if (nodeID != null)
{
objct = GetBlankNode(nodeID);
}
else if (resource != null)
{
objct = GetNamedNode(Unrelativize(resource));
}
ParsePropertyAttributes((Entity)objct);
// No children are allowed in this element.
if (!xml.IsEmptyElement)
{
while (xml.Read())
{
if (xml.NodeType == XmlNodeType.EndElement)
{
break;
}
if (xml.NodeType == XmlNodeType.Whitespace)
{
continue;
}
if (xml.NodeType == XmlNodeType.Comment)
{
continue;
}
if (xml.NodeType == XmlNodeType.ProcessingInstruction)
{
continue;
}
OnError("Content is not allowed within a property with a rdf:nodeID or rdf:resource attribute");
}
}
}
else if (parseType != null && parseType == "Literal")
{
if (datatype != null)
{
OnError("The attribute rdf:datatype is not valid on a predicate whose parseType is Literal");
}
datatype = "http://www.w3.org/1999/02/22-rdf-syntax-ns#XMLLiteral";
if (ParsePropertyAttributes(new BNode()))
{
OnError("Property attributes are not valid when parseType is Literal");
}
// TODO: Do we canonicalize according to:
// http://www.w3.org/TR/2002/REC-xml-exc-c14n-20020718/ ?
objct = new Literal(xml.ReadInnerXml(), null, datatype);
ValidateLiteral((Literal)objct);
}
else if (parseType != null && parseType == "Resource")
{
objct = new BNode();
ParsePropertyAttributes((Entity)objct);
if (!xml.IsEmptyElement)
{
ParsePropertyNodes((Entity)objct);
}
}
else if (parseType != null && parseType == "Collection")
{
Entity collection = new BNode();
Entity lastnode = collection;
bool empty = true;
ParsePropertyAttributes(collection);
if (!xml.IsEmptyElement)
{
while (xml.Read())
{
if (xml.NodeType == XmlNodeType.EndElement)
{
break;
}
if (xml.NodeType != XmlNodeType.Element)
{
continue;
}
if (!empty)
{
Entity next = new BNode();
storage.Add(new Statement(lastnode, rdfRest, next, Meta));
lastnode = next;
}
Entity item = ParseDescription();
storage.Add(new Statement(lastnode, rdfFirst, item, Meta));
empty = false;
}
}
storage.Add(new Statement(lastnode, rdfRest, rdfNil, Meta));
if (empty)
{
objct = rdfNil;
}
else
{
objct = collection;
}
}
else if (parseType != null)
{
OnError("Invalid value for parseType: '" + parseType + "'");
}
else if (datatype != null)
{
// Note that any xml:lang is discarded.
if (ParsePropertyAttributes(new BNode()))
{
OnError("Property attributes are not valid when a datatype is given");
}
if (xml.IsEmptyElement)
{
objct = new Literal("", null, datatype);
ValidateLiteral((Literal)objct);
}
else
{
#if !DOTNET2
objct = new Literal(xml.ReadString(), null, datatype);
if (xml.NodeType != XmlNodeType.EndElement)
{
OnError("XML markup may not appear in a datatyped literal property");
}
#else
try {
objct = new Literal(xml.ReadElementContentAsString(), null, datatype);
} catch (XmlException) {
OnError("XML markup may not appear in a datatyped literal property");
}
#endif
ValidateLiteral((Literal)objct);
}
}
else
{
// We don't know whether the contents of this element
// refer to a literal or an entity. If an element is
// a child of this node, then it must be an entity.
// If the property has predicate attributes, then it
// is an anonymous entity. Otherwise the text content
// is the literal value.
objct = new BNode();
if (ParsePropertyAttributes((Entity)objct))
{
// Found property attributes. There should be no other internal content?
if (!xml.IsEmptyElement)
{
while (xml.Read())
{
if (xml.NodeType == XmlNodeType.EndElement)
{
break;
}
if (xml.NodeType == XmlNodeType.Whitespace)
{
continue;
}
if (xml.NodeType == XmlNodeType.Comment)
{
continue;
}
if (xml.NodeType == XmlNodeType.ProcessingInstruction)
{
continue;
}
OnError(xml.NodeType + " is not allowed within a property with property attributes");
}
}
}
else
{
StringBuilder textcontent = new StringBuilder();
bool hadText = false;
bool hadElement = false;
if (!xml.IsEmptyElement)
{
while (xml.Read())
{
if (xml.NodeType == XmlNodeType.EndElement)
{
break;
}
if (xml.NodeType == XmlNodeType.Element)
{
if (hadText)
{
OnError("Both text and elements are present as a property value");
}
if (hadElement)
{
OnError("A property node cannot contain more than one entity description. " + objct + " already found");
}
hadElement = true;
objct = ParseDescription();
}
else if (xml.NodeType == XmlNodeType.Text || xml.NodeType == XmlNodeType.SignificantWhitespace)
{
if (hadElement)
{
OnError("Both text and elements are present as a property value");
}
textcontent.Append(xml.Value);
hadText = true;
}
else
{
textcontent.Append(xml.Value);
}
}
}
if (!hadElement)
{
objct = new Literal(textcontent.ToString(), lang, null);
}
}
}
storage.Add(new Statement(subject, predicate, objct, Meta));
if (ID != null)
{
// In addition to adding the statement as normal, also
// add a reified statement.
Entity statement = GetNamedNode(Unrelativize("#" + ID));;
storage.Add(new Statement(statement, rdfType, rdfStatement, Meta));
storage.Add(new Statement(statement, rdfSubject, subject, Meta));
storage.Add(new Statement(statement, rdfPredicate, (Entity)predicate, Meta));
storage.Add(new Statement(statement, rdfObject, objct, Meta));
}
}
protected object GetObject(Literal lit)
{
//TDB
return lit.Value;
}
protected void ValidateLiteral(Literal literal)
{
#if !SILVERLIGHT
if (!validateLiterals) return;
try {
literal.ParseValue();
} catch (FormatException e) {
OnWarning("Typed literal has an invalid lexical value: " + e.Message + ": " + literal);
} catch (ArgumentOutOfRangeException e) {
OnWarning("Typed literal has an invalid lexical value: " + literal);
}
#endif
}
public static void AddLiteral(StatementSink sink, string predicate, string type, SemWeb.Literal value)
{
Entity empty = new BNode();
Statement top = new Statement(FSpotXMPBase, (Entity)MetadataStore.Namespaces.Resolve(predicate), empty);
Statement desc = new Statement(empty,
(Entity)MetadataStore.Namespaces.Resolve("rdf:type"),
(Entity)MetadataStore.Namespaces.Resolve(type));
sink.Add(desc);
Statement literal = new Statement(empty,
(Entity)MetadataStore.Namespaces.Resolve("rdf:li"),
value);
sink.Add(literal);
sink.Add(top);
}
public LiteralWrapper(Literal res)
{
r = res; hc = java.lang.String.instancehelper_hashCode(r.Value);
}
public StringContainsFilter(Literal res) : base(res) { }
public NumericFilter(Literal res) : this(int.Parse(res.Value)) { }
// Specify:
// compareResult orEqual Meaning
// -1 false Less Than
// -1 true Less Than Or Equal
// 0 false Not Equal
// 0 true Equal
// 1 false Greater Than
// 1 true Greater Than Or Equal
public StringCompareFilter(Literal res, int compareResult, bool orEqual) : base(res) { compare = compareResult; eq = orEqual; }
public StringFilter(Literal res) : this(res.Value) {
}
public TimeSpanFilter(Literal res) : this(TimeSpan.Parse(res.Value)) { }
public DateTimeFilter(Literal res) : this(DateTime.Parse(res.Value)) { }
private static void ProcessResponse(string mimetype, Stream stream, object outputObj) {
// If the user wants the output sent to a TextWriter, copy the response from
// the response stream to the TextWriter. TODO: Get encoding from HTTP header.
if (outputObj is TextWriter) {
TextWriter tw = (TextWriter)outputObj;
using (StreamReader reader = new StreamReader(stream, System.Text.Encoding.UTF8)) {
char[] buffer = new char[512];
while (true) {
int len = reader.Read(buffer, 0, buffer.Length);
if (len <= 0) break;
tw.Write(buffer, 0, len);
if (Debug) {
Console.Error.WriteLine(">> " + new String(buffer, 0, len));
}
}
}
tw.Flush();
return;
}
// If the user wants a boolean out of this, then we're expecting a
// SPARQL XML Results document with a boolean response element.
if (outputObj is BooleanWrap) {
BooleanWrap bw = (BooleanWrap)outputObj;
if (mimetype != null && mimetype != "application/sparql-results+xml" && mimetype != "text/xml" && mimetype != "application/xml")
throw new ApplicationException("The result of the query was not a SPARQL Results document.");
XmlReader xmldoc = new XmlTextReader(stream);
{
// Move to the document element
while (xmldoc.Read())
if (xmldoc.NodeType == XmlNodeType.Element) break;
// Just check that it has the right local name.
if (xmldoc.LocalName != "sparql" || xmldoc.IsEmptyElement)
throw new ApplicationException("Invalid server response: Not a SPARQL results document.");
// Move to the next node.
while (xmldoc.Read())
if (xmldoc.NodeType == XmlNodeType.Element) break;
// If it's a head node, skip it.
if (xmldoc.LocalName == "head") {
xmldoc.Skip();
// Move to the 'boolean' element, it better be next
while (xmldoc.Read())
if (xmldoc.NodeType == XmlNodeType.Element) break;
}
if (xmldoc.LocalName != "boolean")
throw new ApplicationException("Invalid server response: Missing 'boolean' element.");
string value = xmldoc.ReadElementString();
bw.value = (value == "true");
}
if (Debug) {
Console.Error.WriteLine(">> " + bw.value);
}
return;
}
// If the user wants statements out of the response, read it with an RDFReader.
if (outputObj is StatementSink) {
// If the mime type is application/sparql-results+xml, just try to
// read it as if it were an RDF/XML MIME type.
if (mimetype != null && mimetype == "application/sparql-results+xml") mimetype = "text/xml";
using (RdfReader reader = RdfReader.Create(mimetype, stream))
reader.Select((StatementSink)outputObj);
if (Debug) {
Console.Error.WriteLine(">> (read as statements)");
}
return;
}
// If the user wants query result bindings, read the response XML.
if (outputObj is QueryResultSink) {
QueryResultSink sink = (QueryResultSink)outputObj;
if (mimetype != null && mimetype != "application/sparql-results+xml" && mimetype != "text/xml")
throw new ApplicationException("The result of the query was not a SPARQL Results document.");
ArrayList variableNames = new ArrayList();
ArrayList variables = new ArrayList();
Variable[] variablesArray = null;
Hashtable bnodes = new Hashtable();
XmlReader xmldoc = new XmlTextReader(stream);
{
// Move to the document element
while (xmldoc.Read())
if (xmldoc.NodeType == XmlNodeType.Element) break;
// Just check that it has the right local name.
if (xmldoc.LocalName != "sparql" || xmldoc.IsEmptyElement)
throw new ApplicationException("Invalid server response: Not a SPARQL results document.");
// Move to the 'head' node, it better be the first element
while (xmldoc.Read())
if (xmldoc.NodeType == XmlNodeType.Element) break;
if (xmldoc.LocalName != "head" || xmldoc.IsEmptyElement)
throw new ApplicationException("Invalid server response: Missing head full element.");
// Read the head element
while (xmldoc.Read()) {
if (xmldoc.NodeType == XmlNodeType.Element && xmldoc.LocalName == "variable") {
if (xmldoc.GetAttribute("name") == null)
throw new ApplicationException("Invalid server response: Head/variable node missing name attribute.");
variableNames.Add(xmldoc.GetAttribute("name"));
variables.Add(new Variable(xmldoc.GetAttribute("name")));
if (!xmldoc.IsEmptyElement) xmldoc.Skip();
} else if (xmldoc.NodeType == XmlNodeType.EndElement) {
break;
}
}
// Move to the 'results' element, it better be next
while (xmldoc.Read())
if (xmldoc.NodeType == XmlNodeType.Element) break;
if (xmldoc.LocalName != "results")
throw new ApplicationException("Invalid server response: Missing results element.");
variablesArray = (Variable[])variables.ToArray(typeof(Variable));
sink.Init(variablesArray);
// Read the results
while (xmldoc.Read()) {
if (xmldoc.NodeType == XmlNodeType.Element && xmldoc.LocalName == "result") {
// Read the bindings in this result
Resource[] valuesArray = new Resource[variablesArray.Length];
while (xmldoc.Read()) {
if (xmldoc.NodeType == XmlNodeType.Element && xmldoc.LocalName == "binding") {
if (xmldoc.IsEmptyElement)
throw new ApplicationException("Invalid server response: Binding element empty.");
if (xmldoc.GetAttribute("name") == null)
throw new ApplicationException("Invalid server response: Result binding node missing name attribute.");
int vIndex = variableNames.IndexOf(xmldoc.GetAttribute("name"));
if (vIndex == -1)
throw new ApplicationException("Invalid server response: Result binding name does not match a variable in the head.");
Resource value = null;
while (xmldoc.Read()) {
if (xmldoc.NodeType == XmlNodeType.Whitespace || xmldoc.NodeType == XmlNodeType.SignificantWhitespace) continue;
if (xmldoc.NodeType == XmlNodeType.Element && xmldoc.LocalName == "uri") {
value = new Entity(xmldoc.ReadElementString());
if (!xmldoc.IsEmptyElement) xmldoc.Skip();
} else if (xmldoc.NodeType == XmlNodeType.Element && xmldoc.LocalName == "literal") {
string lang = xmldoc.XmlLang;
if (lang == "") lang = null;
string dt = xmldoc.GetAttribute("datatype");
value = new Literal(xmldoc.ReadElementString(), lang, dt);
if (!xmldoc.IsEmptyElement) xmldoc.Skip();
} else if (xmldoc.NodeType == XmlNodeType.Element && xmldoc.LocalName == "bnode") {
string id = xmldoc.ReadElementString();
if (bnodes.ContainsKey(id)) {
value = (BNode)bnodes[id];
} else {
value = new BNode(id);
bnodes[id] = value;
}
if (!xmldoc.IsEmptyElement) xmldoc.Skip();
} else {
throw new ApplicationException("Invalid server response: Invalid content in binding node.");
}
break;
}
if (value == null)
throw new ApplicationException("Invalid server response: Result binding value is invalid.");
valuesArray[vIndex] = value;
} else if (xmldoc.NodeType == XmlNodeType.EndElement) {
break;
}
}
sink.Add(new VariableBindings(variablesArray, valuesArray));
if (Debug) {
Console.Error.WriteLine(">> " + new VariableBindings(variablesArray, valuesArray));
}
} else if (xmldoc.NodeType == XmlNodeType.EndElement) {
break;
}
}
sink.Finished();
}
}
}
private void ParseProperty(Entity subject, ref int liIndex) {
// The reader is positioned on a propert node,
// and on returning the reader is positioned past
// that node.
// Get all of the attributes before we move the reader forward.
string nodeID = xml.GetAttribute("nodeID", NS.RDF);
string resource = xml.GetAttribute("resource", NS.RDF);
string parseType = xml.GetAttribute("parseType", NS.RDF);
string datatype = xml.GetAttribute("datatype", NS.RDF);
string lang = xml.XmlLang != "" ? xml.XmlLang : null;
string predicate = CurNode();
if (predicate == NS.RDF + "li")
predicate = NS.RDF + "_" + (liIndex++);
if (IsRestrictedName(predicate))
OnError(xml.Name + " cannot be used as a property name.");
if (IsDeprecatedName(predicate))
OnError(xml.Name + " has been deprecated and cannot be used as a property name.");
string ID = xml.GetAttribute("ID", NS.RDF);
if (nodeID != null && !IsValidXmlName(nodeID))
OnWarning("'" + nodeID + "' is not a valid XML Name");
if (ID != null && !IsValidXmlName(ID))
OnWarning("'" + ID + "' is not a valid XML Name");
Resource objct = null;
if (nodeID != null || resource != null) {
if (isset(nodeID) + isset(resource) > 1)
OnError("A predicate node cannot specify more than one of rdf:nodeID and rdf:resource");
if (parseType != null || datatype != null)
OnError("The attributes rdf:parseType and rdf:datatype are not valid on a predicate with a rdf:nodeID or rdf:resource attribute");
// Object is an entity given by nodeID or resource.
if (nodeID != null)
objct = GetBlankNode(nodeID);
else if (resource != null)
objct = GetNamedNode(Unrelativize(resource));
ParsePropertyAttributes((Entity)objct);
// No children are allowed in this element.
if (!xml.IsEmptyElement)
while (xml.Read()) {
if (xml.NodeType == XmlNodeType.EndElement) break;
if (xml.NodeType == XmlNodeType.Whitespace) continue;
if (xml.NodeType == XmlNodeType.Comment) continue;
if (xml.NodeType == XmlNodeType.ProcessingInstruction) continue;
OnError("Content is not allowed within a property with a rdf:nodeID or rdf:resource attribute");
}
} else if (parseType != null && parseType == "Literal") {
if (datatype != null)
OnError("The attribute rdf:datatype is not valid on a predicate whose parseType is Literal.");
datatype = "http://www.w3.org/1999/02/22-rdf-syntax-ns#XMLLiteral";
if (ParsePropertyAttributes(new BNode()))
OnError("Property attributes are not valid when parseType is Literal");
// TODO: Do we canonicalize according to:
// http://www.w3.org/TR/2002/REC-xml-exc-c14n-20020718/ ?
objct = new Literal(xml.ReadInnerXml(), null, datatype);
} else if (parseType != null && parseType == "Resource") {
objct = new BNode();
ParsePropertyAttributes((Entity)objct);
if (!xml.IsEmptyElement)
ParsePropertyNodes((Entity)objct);
} else if (parseType != null && parseType == "Collection") {
Entity collection = new BNode();
Entity lastnode = collection;
bool empty = true;
ParsePropertyAttributes(collection);
if (!xml.IsEmptyElement)
while (xml.Read()) {
if (xml.NodeType == XmlNodeType.EndElement) break;
if (xml.NodeType != XmlNodeType.Element) continue;
if (!empty) {
Entity next = new BNode();
storage.Add(new Statement(lastnode, rdfRest, next, Meta));
lastnode = next;
}
Entity item = ParseDescription();
storage.Add(new Statement(lastnode, rdfFirst, item, Meta));
empty = false;
}
storage.Add(new Statement(lastnode, rdfRest, rdfNil, Meta));
if (empty)
objct = rdfNil;
else
objct = collection;
} else if (parseType != null) {
OnError("Invalid value for parseType: '" + parseType + "'");
} else if (datatype != null) {
// Note that any xml:lang is discarded.
if (ParsePropertyAttributes(new BNode()))
OnError("Property attributes are not valid when a datatype is given");
if (xml.IsEmptyElement) {
objct = new Literal("", null, datatype);
} else {
#if !DOTNET2
objct = new Literal(xml.ReadString(), null, datatype);
#else
objct = new Literal(xml.ReadElementContentAsString(), null, datatype);
#endif
if (xml.NodeType != XmlNodeType.EndElement)
OnError("XML markup may not appear in a datatyped literal property.");
}
} else {
// We don't know whether the contents of this element
// refer to a literal or an entity. If an element is
// a child of this node, then it must be an entity.
// If the property has predicate attributes, then it
// is an anonymous entity. Otherwise the text content
// is the literal value.
objct = new BNode();
if (ParsePropertyAttributes((Entity)objct)) {
// Found property attributes. There should be no other internal content?
if (!xml.IsEmptyElement)
while (xml.Read()) {
if (xml.NodeType == XmlNodeType.EndElement) break;
if (xml.NodeType == XmlNodeType.Whitespace) continue;
if (xml.NodeType == XmlNodeType.Comment) continue;
if (xml.NodeType == XmlNodeType.ProcessingInstruction) continue;
OnError(xml.NodeType + " is not allowed within a property with property attributes");
}
} else {
StringBuilder textcontent = new StringBuilder();
bool hadText = false;
bool hadElement = false;
if (!xml.IsEmptyElement)
while (xml.Read()) {
if (xml.NodeType == XmlNodeType.EndElement) break;
if (xml.NodeType == XmlNodeType.Element) {
if (hadText)
OnError("Both text and elements are present as a property value");
if (hadElement)
OnError("A property node cannot contain more than one entity description. " + objct + " already found.");
hadElement = true;
objct = ParseDescription();
} else if (xml.NodeType == XmlNodeType.Text || xml.NodeType == XmlNodeType.SignificantWhitespace) {
if (hadElement)
OnError("Both text and elements are present as a property value");
textcontent.Append(xml.Value);
hadText = true;
} else {
textcontent.Append(xml.Value);
}
}
if (!hadElement)
objct = new Literal(textcontent.ToString(), lang, null);
}
}
storage.Add(new Statement(subject, predicate, objct, Meta));
if (ID != null) {
// In addition to adding the statement as normal, also
// add a reified statement.
Entity statement = GetNamedNode(Unrelativize("#" + ID));;
storage.Add(new Statement(statement, rdfType, rdfStatement, Meta));
storage.Add(new Statement(statement, rdfSubject, subject, Meta));
storage.Add(new Statement(statement, rdfPredicate, (Entity)predicate, Meta));
storage.Add(new Statement(statement, rdfObject, objct, Meta));
}
}
public void ProcessStore(MetadataStore store, Photo photo)
{
Hashtable descriptions = new Hashtable();
uint rating = System.UInt32.MaxValue;
uint urgency = System.UInt32.MaxValue;
foreach (Statement stmt in store)
{
//StatementList list = null;
switch (stmt.Predicate.Uri)
{
case Caption:
case Headline:
if (!descriptions.Contains(stmt.Predicate.Uri))
{
string caption = GetTextField(stmt.Object as SemWeb.Literal);
if (caption != null)
{
caption = caption.Trim();
}
if ((caption != null) && (caption.Length > 0))
{
descriptions.Add(stmt.Predicate.Uri, caption);
}
}
break;
case Title:
case Description:
case UserComment:
if (!(stmt.Object is Entity))
{
break;
}
foreach (Statement tag in store.Select(new Statement(stmt.Object as Entity, null, null)))
{
if ((tag.Predicate != RdfType) && (!descriptions.Contains(stmt.Predicate.Uri)))
{
string title = null;
try {
title = (GetTextField((SemWeb.Literal)tag.Object)).Trim();
} catch {
}
if ((title != null) && (title.Length > 0))
{
descriptions.Add(stmt.Predicate.Uri, title);
}
}
}
break;
case Urgency: // Used if Rating was not found
case Rating:
SemWeb.Literal l = stmt.Object as SemWeb.Literal;
if (l != null && l.Value != null && l.Value.Length > 0)
{
uint tmp_ui;
try {
tmp_ui = System.Convert.ToUInt32(l.Value);
} catch {
// Set rating to 0, and continue
Log.DebugFormat("Found illegal rating >{0}< in predicate {1}. Rating cleared",
l.Value, stmt.Predicate.Uri);
tmp_ui = 0;
}
if (tmp_ui > 5) // Max rating allowed in F-Spot
{
tmp_ui = 5;
}
if (stmt.Predicate.Uri == Rating)
{
rating = tmp_ui;
}
else
{
urgency = tmp_ui == 0 ? 0 : tmp_ui - 1; // Urgency valid values 1 - 8
}
}
break;
case State:
case City:
case Country:
case Location:
case Source:
AddTagToPhoto(photo, stmt.Object as SemWeb.Literal, taginfo_table [stmt.Predicate] as TagInfo);
break;
case Subject:
case SupplementalCategories:
case People:
if (!(stmt.Object is Entity))
{
break;
}
foreach (Statement tag in store.Select(new Statement(stmt.Object as Entity, null, null)))
{
if (tag.Predicate != RdfType)
{
AddTagToPhoto(photo, tag.Object as SemWeb.Literal, null);
}
}
break;
}
}
if (descriptions.Contains(UserComment))
{
photo.Description = descriptions [UserComment] as String;
}
// Use the old urgency, only if rating was not available.
if (urgency < System.UInt32.MaxValue)
{
photo.Rating = urgency;
}
if (rating < System.UInt32.MaxValue)
{
photo.Rating = rating;
}
#if false
//FIXME: looks like we are doing some questionable repurposing of tags here...
// We want to construct the following : Description = <Headline> :: <Caption>
// only check for more title/comment if you still do not have one.
if ((photo.Description == null) || (photo.Description.Length == 0))
{
if (descriptions.Contains(Headline))
{
photo.Description = descriptions [Headline] as String;
}
// Lets add the Caption to the existing Description (Headline).
if (descriptions.Contains(Caption))
{
photo.Description += (((photo.Description == null) ? "" : " :: ") + descriptions [Caption] as String);
}
}
// only check for more title/comment if you still do not have one.
if ((photo.Description == null) || (photo.Description.Length == 0))
{
if (descriptions.Contains(Title))
{
photo.Description = descriptions [Title] as String;
}
// Lets add the Description to the existing Description (Title).
if (descriptions.Contains(Description))
{
photo.Description += (((photo.Description == null) ? "" : " :: ") + descriptions [Description] as String);
}
}
#endif
}
protected override void extractLiteralFilters(name.levering.ryan.sparql.model.logic.ExpressionLogic node, java.util.Map literalFilters)
{
//Console.Error.WriteLine(node + " " + node.GetType());
base.extractLiteralFilters(node, literalFilters);
if (node is BinaryExpressionNode) {
BinaryExpressionNode b = (BinaryExpressionNode)node;
LiteralFilter.CompType comp;
if (node is ASTEqualsNode)
comp = LiteralFilter.CompType.EQ;
else if (node is ASTNotEqualsNode)
comp = LiteralFilter.CompType.NE;
else if (node is ASTGreaterThanNode)
comp = LiteralFilter.CompType.GT;
else if (node is ASTGreaterThanEqualsNode)
comp = LiteralFilter.CompType.GE;
else if (node is ASTLessThanNode)
comp = LiteralFilter.CompType.LT;
else if (node is ASTLessThanEqualsNode)
comp = LiteralFilter.CompType.LE;
else
return;
SparqlVariable var;
name.levering.ryan.sparql.common.Literal val;
object left = RemoveCast(b.getLeftExpression());
object right = RemoveCast(b.getRightExpression());
if (left is ASTVar && right is name.levering.ryan.sparql.common.Literal) {
var = (SparqlVariable)left;
val = (name.levering.ryan.sparql.common.Literal)right;
} else if (right is ASTVar && left is name.levering.ryan.sparql.common.Literal) {
var = (SparqlVariable)right;
val = (name.levering.ryan.sparql.common.Literal)left;
switch (comp) {
case LiteralFilter.CompType.LT: comp = LiteralFilter.CompType.GE; break;
case LiteralFilter.CompType.LE: comp = LiteralFilter.CompType.GT; break;
case LiteralFilter.CompType.GT: comp = LiteralFilter.CompType.LE; break;
case LiteralFilter.CompType.GE: comp = LiteralFilter.CompType.LT; break;
}
} else {
return;
}
object parsedvalue = new Literal(val.getLabel(), null, val.getDatatype() == null ? null : val.getDatatype().getURI()).ParseValue();
LiteralFilter filter = LiteralFilter.Create(comp, parsedvalue);
addLiteralFilter(var, filter, literalFilters);
} else if (node is ASTRegexFuncNode) {
ASTRegexFuncNode renode = (ASTRegexFuncNode)node;
SparqlVariable var = RemoveCast(renode.getArguments().get(0)) as ASTVar;
name.levering.ryan.sparql.common.Literal relit = RemoveCast(renode.getArguments().get(1)) as name.levering.ryan.sparql.common.Literal;
if (var == null || relit == null) return;
string re = relit.getLabel();
if (re.Length == 0) return;
bool startsW = removeChar(ref re, '^', 0); // chop of ^ from start, return whether it was there
bool endsW = removeChar(ref re, '$', 1); // chop of $ from end, return whether it was there
// make sure the re that's left has no special re characters
foreach (char c in re)
if (c == '(' || c == '[' || c == '{' || c == '*' || c == '?' || c == '+' || c == '\\' || c == '|' || c == '.')
return;
LiteralFilter filter;
if (startsW && endsW) {
filter = LiteralFilter.Create(LiteralFilter.CompType.EQ, re);
} else if (startsW) {
filter = new SemWeb.Filters.StringStartsWithFilter(re);
} else if (endsW) {
filter = new SemWeb.Filters.StringEndsWithFilter(re);
} else {
filter = new SemWeb.Filters.StringContainsFilter(re);
}
addLiteralFilter(var, filter, literalFilters);
}
}
private object ReadToken(MyReader source, ParseContext context) {
ReadWhitespace(source);
Location loc = new Location(source.Line, source.Col);
int firstchar = source.Read();
if (firstchar == -1)
return "";
StringBuilder b = readTokenBuffer; readTokenBuffer.Length = 0;
b.Append((char)firstchar);
if (firstchar == '<') {
// This is a URI or the <= verb. URIs can have \'s and <'s escaped with a backslash, plus \u and \U notation.
bool escaped = false;
while (true) {
int c = source.Read();
if (c == -1) OnError("Unexpected end of stream within a token beginning with <", loc);
if (b.Length == 2 && c == '=')
return "<="; // the <= verb
if (escaped) {
ReadEscapedChar((char)c, b, source, loc, true, true, false);
// the first flag should be set true only if not NTriples, but we are flexible on reading.
// the second flag should be set true only if NTriples, but we are flexible on reading.
escaped = false;
} else if (c == '\\') {
escaped = true;
} else {
b.Append((char)c);
if (c == '>') // end of the URI
break;
}
}
} else if (firstchar == '"') {
// This can either be a string "..." or a longString """...""", which additionally allows embedded \n, \r, and \t, and quotes.
b.Length = 0; // get rid of the open quote
bool escaped = false;
bool triplequoted = false;
while (true) {
int c = source.Read();
if (c == -1) OnError("Unexpected end of stream within a string", loc);
// Check if this is started by three quotes. If we've already read three quotes, don't keep checking or we can't read """""".
if (b.Length == 0 && c == (int)'"' && source.Peek() == (int)'"' && !triplequoted) {
triplequoted = true;
source.Read();
continue;
}
if (escaped) {
ReadEscapedChar((char)c, b, source, loc, false, true, true); // the last flag should be set true only if N3, but we are flexible on reading
escaped = false;
} else if (c == '\\') {
escaped = true;
} else {
if (c == '"' && !triplequoted)
break;
if (c == '"' && source.Peek() == '"' && source.Peek2() == '"' && triplequoted)
break;
b.Append((char)c);
}
}
if (triplequoted) { // read the extra end quotes
source.Read();
source.Read();
}
string litvalue = b.ToString();
string litlang = null;
string litdt = null;
// Strings can be suffixed with @langcode or ^^symbol (but not both?).
if (source.Peek() == '@') {
source.Read();
b.Length = 0;
while (char.IsLetterOrDigit((char)source.Peek()) || source.Peek() == (int)'-')
b.Append((char)source.Read());
litlang = b.ToString();
} else if (source.Peek() == '^' && source.Peek2() == '^') {
loc = new Location(source.Line, source.Col);
source.Read();
source.Read();
litdt = ReadToken(source, context).ToString(); // better be a string URI
if (litdt.StartsWith("<") && litdt.EndsWith(">"))
litdt = litdt.Substring(1, litdt.Length-2);
else if (litdt.IndexOf(":") != -1) {
Resource r = ResolveQName(litdt, context, loc);
if (r.Uri == null)
OnError("A literal datatype cannot be an anonymous entity", loc);
litdt = r.Uri;
}
}
Literal literal = new Literal(litvalue, litlang, litdt);
ValidateLiteral(literal);
return literal;
} else if (char.IsLetter((char)firstchar) || firstchar == '?' || firstchar == '@' || firstchar == ':' || firstchar == '_') {
// Something starting with @
// A QName: ([a-zA-Z_][a-zA-Z0-9_]*)?:)?([a-zA-Z_][a-zA-Z0-9_]*)?
// A variable: \?[a-zA-Z_][a-zA-Z0-9_]*
while (true) {
int c = source.Peek();
if (c == -1 || (!Entity.ValidateUriIsIUnreserved((char)c) && c != ':') || c == '.') break;
b.Append((char)source.Read());
}
} else if (char.IsDigit((char)firstchar) || firstchar == '+' || firstchar == '-') {
while (true) {
int ci = source.Peek();
if (ci == -1) break;
if (ci == ']' || ci == ')' || ci == '}') break;
// punctuation followed by a space means the punctuation is
// punctuation, and not part of this token
if (!char.IsDigit((char)ci) && source.Peek2() != -1 && char.IsWhiteSpace((char)source.Peek2()))
break;
char c = (char)ci;
if (char.IsWhiteSpace(c)) break;
b.Append((char)source.Read());
}
} else if (firstchar == '=') {
if (source.Peek() == (int)'>')
b.Append((char)source.Read());
if (source.Peek() == (int)':' && source.Peek2() == (int)'>') { // SPECIAL EXTENSION "=:>"
b.Append((char)source.Read());
b.Append((char)source.Read());
}
} else if (firstchar == '[') {
// The start of an anonymous node.
} else if (firstchar == '{') {
return "{";
} else if (firstchar == '(') {
return "(";
} else if (firstchar == ')') {
return ")";
} else {
while (true) {
int c = source.Read();
if (c == -1) break;
if (char.IsWhiteSpace((char)c)) break;
b.Append((char)c);
}
OnError("Invalid token: " + b.ToString(), loc);
}
return b.ToString();
}
/// <summary>
/// Writes the literal to the output writer.
/// </summary>
/// <param name="literal">The literal.</param>
protected virtual void WriteLiteral(Literal literal)
{
if(!String.IsNullOrEmpty(literal.Language))
{
WriteLiteralValueWithLanguage(literal.Value, literal.Language);
}
else if(!String.IsNullOrEmpty(literal.DataType))
{
WriteLiteralValueWithDataType(literal.Value, literal.DataType);
}
else
{
WriteLiteralValue(literal.Value);
}
}
private static bool MatchesFilters(Literal literal, LiteralFilter[] filters, SelectableSource targetModel) {
foreach (LiteralFilter filter in filters)
if (!filter.Filter(literal, targetModel))
return false;
return true;
}
