public SparqlAutoCompleter(SparqlQuerySyntax? syntax)
{
//Alter the Regex patterns
this.PrefixRegexPattern = this.PrefixRegexPattern.Substring(1, this.PrefixRegexPattern.Length-6);
this.BlankNodePattern = @"_:(\p{L}|\d)(\p{L}|\p{N}|-|_)*";
//Add Prefix Definitions to Keywords
this._keywords.AddRange(AutoCompleteManager.PrefixData);
//If not Query Syntax don't add any Query Keywords
if (syntax == null) return;
//Add Keywords relevant to the Syntax
this._syntax = (SparqlQuerySyntax)syntax;
foreach (String keyword in SparqlSpecsHelper.SparqlQuery10Keywords)
{
this._keywords.Add(new KeywordCompletionData(keyword));
this._keywords.Add(new KeywordCompletionData(keyword.ToLower()));
}
if (syntax != SparqlQuerySyntax.Sparql_1_0)
{
foreach (String keyword in SparqlSpecsHelper.SparqlQuery11Keywords)
{
this._keywords.Add(new KeywordCompletionData(keyword));
this._keywords.Add(new KeywordCompletionData(keyword.ToLower()));
}
}
//Sort the Keywords
this._keywords.Sort();
}
/// <summary>
/// Creates a new Instance of the Tokeniser
/// </summary>
/// <param name="input">The Input Stream to generate Tokens from</param>
/// <param name="syntax">Syntax Mode to use when parsing</param>
public SparqlTokeniser(BlockingTextReader input, SparqlQuerySyntax syntax)
: base(input)
{
this._in = input;
this.Format = "SPARQL";
this._syntax = syntax;
}
/// <summary>
/// Creates a new SPARQL Query Parser Context for parsing sub-queries.
/// </summary>
/// <param name="parent">Parent Query Parser Context.</param>
/// <param name="tokens">Tokens that need parsing to form a subquery.</param>
protected internal SparqlQueryParserContext(SparqlQueryParserContext parent, ITokenQueue tokens)
: base(new NullHandler(), null)
{
_traceParsing = parent.TraceParsing;
_traceTokeniser = parent.TraceTokeniser;
_queue = tokens;
_subqueryMode = true;
_query = new SparqlQuery(true);
_factories = parent.ExpressionFactories;
_syntax = parent.SyntaxMode;
_exprParser.SyntaxMode = _syntax;
}
/// <summary>
/// Creates a new auto-complete for the specific SPARQL syntax
/// </summary>
/// <param name="editor">Text Editor</param>
/// <param name="syntax">SPARQL Syntax</param>
public SparqlAutoCompleter(ITextEditorAdaptor <T> editor, SparqlQuerySyntax?syntax)
: base(editor)
{
//Alter the Regex patterns
this.PrefixRegexPattern = this.PrefixRegexPattern.Substring(1, this.PrefixRegexPattern.Length - 6);
this.BlankNodePattern = @"_:(\p{L}|\d)(\p{L}|\p{N}|-|_)*";
//Add Prefix Definitions to Keywords
this._keywords.Add(new SparqlStyleBaseDeclarationData());
this._keywords.Add(new SparqlStyleDefaultPrefixDeclarationData());
foreach (VocabularyDefinition vocab in AutoCompleteManager.Vocabularies)
{
this._keywords.Add(new SparqlStylePrefixDeclarationData(vocab.Prefix, vocab.NamespaceUri));
}
//If not Query Syntax don't add any Query Keywords
if (syntax == null)
{
return;
}
//Add Keywords relevant to the Syntax
this._syntax = (SparqlQuerySyntax)syntax;
foreach (String keyword in SparqlSpecsHelper.SparqlQuery10Keywords)
{
this._keywords.Add(new KeywordData(keyword));
this._keywords.Add(new KeywordData(keyword.ToLower()));
}
if (syntax != SparqlQuerySyntax.Sparql_1_0)
{
foreach (String keyword in SparqlSpecsHelper.SparqlQuery11Keywords)
{
this._keywords.Add(new KeywordData(keyword));
this._keywords.Add(new KeywordData(keyword.ToLower()));
}
}
//Sort the Keywords
this._keywords.Sort();
}
/// <summary>
/// Creates a new Query Handler Configuration
/// </summary>
/// <param name="context">HTTP Context</param>
/// <param name="g">Configuration Graph</param>
/// <param name="objNode">Object Node</param>
public BaseQueryHandlerConfiguration(HttpContext context, IGraph g, INode objNode)
: base(context, g, objNode)
{
//Get the Query Processor to be used
ISparqlQueryProcessor processor;
INode procNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyQueryProcessor));
if (procNode == null) throw new DotNetRdfConfigurationException("Unable to load Query Handler Configuration as the RDF configuration file does not specify a dnr:queryProcessor property for the Handler");
Object temp = ConfigurationLoader.LoadObject(g, procNode);
if (temp is ISparqlQueryProcessor)
{
processor = (ISparqlQueryProcessor)temp;
}
else
{
throw new DotNetRdfConfigurationException("Unable to load Query Handler Configuration as the RDF configuration file specifies a value for the Handlers dnr:updateProcessor property which cannot be loaded as an object which implements the ISparqlQueryProcessor interface");
}
this._processor = processor;
//SPARQL Query Default Config
this._defaultGraph = ConfigurationLoader.GetConfigurationValue(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyDefaultGraphUri)).ToSafeString();
this._defaultTimeout = ConfigurationLoader.GetConfigurationInt64(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyTimeout), this._defaultTimeout);
this._defaultPartialResults = ConfigurationLoader.GetConfigurationBoolean(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyPartialResults), this._defaultPartialResults);
//Handler Configuration
this._showQueryForm = ConfigurationLoader.GetConfigurationBoolean(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyShowQueryForm), this._showQueryForm);
String defQueryFile = ConfigurationLoader.GetConfigurationString(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyDefaultQueryFile));
if (defQueryFile != null)
{
defQueryFile = ConfigurationLoader.ResolvePath(defQueryFile);
if (File.Exists(defQueryFile))
{
using (StreamReader reader = new StreamReader(defQueryFile))
{
this._defaultQuery = reader.ReadToEnd();
reader.Close();
}
}
}
//Get Query Syntax to use
try
{
String syntaxSetting = ConfigurationLoader.GetConfigurationString(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertySyntax));
if (syntaxSetting != null)
{
this._syntax = (SparqlQuerySyntax)Enum.Parse(typeof(SparqlQuerySyntax), syntaxSetting);
}
}
catch (Exception ex)
{
throw new DotNetRdfConfigurationException("Unable to set the Syntax for the HTTP Handler identified by the Node '" + objNode.ToString() + "' as the value given for the dnr:syntax property was not a valid value from the enum VDS.RDF.Parsing.SparqlQuerySyntax", ex);
}
//Get the SPARQL Describe Algorithm
INode describeNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyDescribeAlgorithm));
if (describeNode != null)
{
if (describeNode.NodeType == NodeType.Literal)
{
String algoClass = ((ILiteralNode)describeNode).Value;
try
{
Object desc = Activator.CreateInstance(Type.GetType(algoClass));
if (desc is ISparqlDescribe)
{
this._describer = (ISparqlDescribe)desc;
}
else
{
throw new DotNetRdfConfigurationException("Unable to set the Describe Algorithm for the HTTP Handler identified by the Node '" + objNode.ToString() + "' as the value given for the dnr:describeAlgorithm property was not a type name of a type that implements the ISparqlDescribe interface");
}
}
catch (DotNetRdfConfigurationException)
{
throw;
}
catch (Exception ex)
{
throw new DotNetRdfConfigurationException("Unable to set the Describe Algorithm for the HTTP Handler identified by the Node '" + objNode.ToString() + "' as the value given for the dnr:describeAlgorithm property was not a type name for a type that can be instantiated", ex);
}
}
}
//Get the Service Description Graph
INode descripNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyServiceDescription));
if (descripNode != null)
{
Object descrip = ConfigurationLoader.LoadObject(g, descripNode);
if (descrip is IGraph)
{
this._serviceDescription = (IGraph)descrip;
}
else
{
throw new DotNetRdfConfigurationException("Unable to set the Service Description Graph for the HTTP Handler identified by the Node '" + objNode.ToString() + "' as the value given for the dnr:serviceDescription property points to an Object which could not be loaded as an object which implements the required IGraph interface");
}
}
//Get the Query Optimiser
INode queryOptNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyQueryOptimiser));
if (queryOptNode != null)
{
Object queryOpt = ConfigurationLoader.LoadObject(g, queryOptNode);
if (queryOpt is IQueryOptimiser)
{
this._queryOptimiser = (IQueryOptimiser)queryOpt;
}
else
{
throw new DotNetRdfConfigurationException("Unable to set the Query Optimiser for the HTTP Handler identified by the Node '" + queryOptNode.ToString() + "' as the value given for the dnr:queryOptimiser property points to an Object which could not be loaded as an object which implements the required IQueryOptimiser interface");
}
}
//Get the Algebra Optimisers
foreach (INode algOptNode in ConfigurationLoader.GetConfigurationData(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyAlgebraOptimiser)))
{
Object algOpt = ConfigurationLoader.LoadObject(g, algOptNode);
if (algOpt is IAlgebraOptimiser)
{
this._algebraOptimisers.Add((IAlgebraOptimiser)algOpt);
}
else
{
throw new DotNetRdfConfigurationException("Unable to set the Algebra Optimiser for the HTTP Handler identified by the Node '" + algOptNode.ToString() + "' as the value given for the dnr:algebraOptimiser property points to an Object which could not be loaded as an object which implements the required IAlgebraOptimiser interface");
}
}
}
/// <summary>
/// Creates a new SPARQL Query Validator using the given Syntax
/// </summary>
/// <param name="syntax">Query Syntax</param>
public SparqlQueryValidator(SparqlQuerySyntax syntax)
{
_parser = new SparqlQueryParser(syntax);
}
/// <summary>
/// Creates a new Instance of the Tokeniser
/// </summary>
/// <param name="input">The Input Stream to generate Tokens from</param>
/// <param name="syntax">Syntax Mode to use when parsing</param>
public SparqlTokeniser(StreamReader input, SparqlQuerySyntax syntax)
: this(new BlockingTextReader(input), syntax) { }
/// <summary>
/// Creates a new SPARQL Query Parser Context for parsing sub-queries
/// </summary>
/// <param name="parent">Parent Query Parser Context</param>
/// <param name="tokens">Tokens that need parsing to form a subquery</param>
protected internal SparqlQueryParserContext(SparqlQueryParserContext parent, ITokenQueue tokens)
: base(new NullHandler(), null)
{
this._traceParsing = parent.TraceParsing;
this._traceTokeniser = parent.TraceTokeniser;
this._queue = tokens;
this._subqueryMode = true;
this._query = new SparqlQuery(true);
this._factories = parent.ExpressionFactories;
this._syntax = parent.SyntaxMode;
this._exprParser.SyntaxMode = this._syntax;
}
/// <summary>
/// Checks whether a given QName is valid in Sparql
/// </summary>
/// <param name="value">QName to check</param>
/// <param name="syntax">SPARQL Syntax</param>
/// <returns></returns>
public static bool IsValidQName(String value, SparqlQuerySyntax syntax)
{
if (!value.Contains(':'))
{
//Must have a Colon in a QName
return false;
}
else if (value.StartsWith(":"))
{
//No need to validate QName
//Just validation Local Name
char[] cs = value.ToCharArray(1, value.Length - 1);
return IsPNLocal(cs, syntax);
}
else
{
//Split into Prefix and Local Name
char[] prefix = value.ToCharArray(0, value.IndexOf(':'));
char[] local = value.ToCharArray(value.IndexOf(':') + 1, value.Length - value.IndexOf(':')-1);
return (IsPNPrefix(prefix) && IsPNLocal(local, syntax));
}
}
/// <summary>
/// Checks whether a given String matches the PN_LOCAL rule from the Sparql Specification
/// </summary>
/// <param name="cs">String as character array</param>
/// <param name="syntax">SPARQL Syntax</param>
/// <returns></returns>
public static bool IsPNLocal(char[] cs, SparqlQuerySyntax syntax)
{
if (cs.Length == 0)
{
//Empty Local Names are valid
return true;
}
//First character must be a digit or from PN_CHARS_U
char first = cs[0];
int start = 0;
if (Char.IsDigit(first) || IsPNCharsU(first) ||
(syntax != SparqlQuerySyntax.Sparql_1_0 && IsPLX(cs, 0, out start)))
{
if (start > 0)
{
//Means the first thing was a PLX
//If the only thing in the local name was a PLX this is valid
if (start == cs.Length - 1) return true;
//If there are further characters we'll start
}
else
{
//Otherwise we need to check the rest of the characters
start = 1;
}
//Check the rest of the characters
if (cs.Length > start)
{
for (int i = start; i < cs.Length; i++)
{
if (i < cs.Length - 1)
{
//Middle characters may be from PN_CHARS or '.'
int j = i;
if (!(cs[i] == '.' || IsPNChars(cs[i]) ||
(syntax != SparqlQuerySyntax.Sparql_1_0 && IsPLX(cs, i, out j))
))
{
return false;
}
if (i != j)
{
//This means we just saw a PLX
//Last thing being a PLX is valid
if (j == cs.Length - 1) return true;
//Otherwise adjust the index appropriately and continue checking further characters
i = j;
}
}
else
{
//Last Character must be from PN_CHARS if it wasn't a PLX which is handled elsewhere
return IsPNChars(cs[i]);
}
}
//Should never get here but have to add this to keep compiler happy
throw new RdfParseException("Local Name validation error in SparqlSpecsHelper.IsPNLocal(char[] cs)");
}
else
{
return true;
}
}
else
{
return false;
}
}
/// <summary>
/// Creates a new SPARQL Query Validator using the given Syntax
/// </summary>
/// <param name="syntax">Query Syntax</param>
public SparqlQueryValidator(SparqlQuerySyntax syntax)
{
this._parser = new SparqlQueryParser(syntax);
}
public SparqlQueryPreprocessor(TextReader input, SparqlQuerySyntax syntax)
: base(input, syntax)
{
QueryType = SparqlQueryType.Unknown;
}
/// <summary>
/// Creates a new instance of the SPARQL Query Parser using the given Tokeniser which supports the given SPARQL Syntax
/// </summary>
/// <param name="queueMode">Token Queue Mode</param>
/// <param name="syntax">SPARQL Syntax</param>
public SparqlQueryParser(TokenQueueMode queueMode, SparqlQuerySyntax syntax)
{
this._queuemode = queueMode;
this._syntax = syntax;
}
/// <summary>
/// Creates a new instance of the SPARQL Query Parser which supports the given SPARQL Syntax
/// </summary>
/// <param name="syntax">SPARQL Syntax</param>
public SparqlQueryParser(SparqlQuerySyntax syntax)
: this(TokenQueueMode.QueueAllBeforeParsing, syntax) { }
/// <summary>
/// Creates a new Instance of the Tokeniser
/// </summary>
/// <param name="input">The Input to generate Tokens from</param>
/// <param name="syntax">Syntax Mode to use when parsing</param>
public SparqlTokeniser(TextReader input, SparqlQuerySyntax syntax)
: this(BlockingTextReader.Create(input), syntax)
{
}
/// <summary>
/// Creates a new Base SPARQL Server Configuration based on information from a Configuration Graph
/// </summary>
/// <param name="context">HTTP Context</param>
/// <param name="g">Configuration Graph</param>
/// <param name="objNode">Object Node</param>
public BaseSparqlServerConfiguration(HttpContext context, IGraph g, INode objNode)
: base(context, g, objNode)
{
//Get the Query Processor to be used
INode procNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyQueryProcessor));
if (procNode != null)
{
Object temp = ConfigurationLoader.LoadObject(g, procNode);
if (temp is ISparqlQueryProcessor)
{
this._queryProcessor = (ISparqlQueryProcessor)temp;
}
else
{
throw new DotNetRdfConfigurationException("Unable to load SPARQL Server Configuration as the RDF configuration file specifies a value for the Handlers dnr:queryProcessor property which cannot be loaded as an object which implements the ISparqlQueryProcessor interface");
}
}
//SPARQL Query Default Config
this._defaultGraph = ConfigurationLoader.GetConfigurationValue(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyDefaultGraphUri)).ToSafeString();
this._defaultTimeout = ConfigurationLoader.GetConfigurationInt64(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyTimeout), this._defaultTimeout);
this._defaultPartialResults = ConfigurationLoader.GetConfigurationBoolean(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyPartialResults), this._defaultPartialResults);
//Handler Configuration
this._showQueryForm = ConfigurationLoader.GetConfigurationBoolean(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyShowQueryForm), this._showQueryForm);
String defQueryFile = ConfigurationLoader.GetConfigurationString(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyDefaultQueryFile));
if (defQueryFile != null)
{
defQueryFile = ConfigurationLoader.ResolvePath(defQueryFile);
if (File.Exists(defQueryFile))
{
using (StreamReader reader = new StreamReader(defQueryFile))
{
this._defaultQuery = reader.ReadToEnd();
reader.Close();
}
}
}
//Get Query Syntax to use
try
{
String syntaxSetting = ConfigurationLoader.GetConfigurationString(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertySyntax));
if (syntaxSetting != null)
{
this._syntax = (SparqlQuerySyntax)Enum.Parse(typeof(SparqlQuerySyntax), syntaxSetting);
}
}
catch (Exception ex)
{
throw new DotNetRdfConfigurationException("Unable to set the Syntax for the HTTP Handler identified by the Node '" + objNode.ToString() + "' as the value given for the dnr:syntax property was not a valid value from the enum VDS.RDF.Parsing.SparqlQuerySyntax", ex);
}
//Get the SPARQL Describe Algorithm
INode describeNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyDescribeAlgorithm));
if (describeNode != null)
{
if (describeNode.NodeType == NodeType.Literal)
{
String algoClass = ((ILiteralNode)describeNode).Value;
try
{
Object desc = Activator.CreateInstance(Type.GetType(algoClass));
if (desc is ISparqlDescribe)
{
this._describer = (ISparqlDescribe)desc;
}
else
{
throw new DotNetRdfConfigurationException("Unable to set the Describe Algorithm for the HTTP Handler identified by the Node '" + objNode.ToString() + "' as the value given for the dnr:describeAlgorithm property was not a type name of a type that implements the ISparqlDescribe interface");
}
}
catch (DotNetRdfConfigurationException)
{
throw;
}
catch (Exception ex)
{
throw new DotNetRdfConfigurationException("Unable to set the Describe Algorithm for the HTTP Handler identified by the Node '" + objNode.ToString() + "' as the value given for the dnr:describeAlgorithm property was not a type name for a type that can be instantiated", ex);
}
}
}
//Get the Query Optimiser
INode queryOptNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyQueryOptimiser));
if (queryOptNode != null)
{
Object queryOpt = ConfigurationLoader.LoadObject(g, queryOptNode);
if (queryOpt is IQueryOptimiser)
{
this._queryOptimiser = (IQueryOptimiser)queryOpt;
}
else
{
throw new DotNetRdfConfigurationException("Unable to set the Query Optimiser for the HTTP Handler identified by the Node '" + queryOptNode.ToString() + "' as the value given for the dnr:queryOptimiser property points to an Object which could not be loaded as an object which implements the required IQueryOptimiser interface");
}
}
//Get the Algebra Optimisers
foreach (INode algOptNode in ConfigurationLoader.GetConfigurationData(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyAlgebraOptimiser)))
{
Object algOpt = ConfigurationLoader.LoadObject(g, algOptNode);
if (algOpt is IAlgebraOptimiser)
{
this._algebraOptimisers.Add((IAlgebraOptimiser)algOpt);
}
else
{
throw new DotNetRdfConfigurationException("Unable to set the Algebra Optimiser for the HTTP Handler identified by the Node '" + algOptNode.ToString() + "' as the value given for the dnr:algebraOptimiser property points to an Object which could not be loaded as an object which implements the required IAlgebraOptimiser interface");
}
}
//Then get the Update Processor to be used
procNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyUpdateProcessor));
if (procNode != null)
{
Object temp = ConfigurationLoader.LoadObject(g, procNode);
if (temp is ISparqlUpdateProcessor)
{
this._updateProcessor = (ISparqlUpdateProcessor)temp;
}
else
{
throw new DotNetRdfConfigurationException("Unable to load SPARQL Server Configuration as the RDF configuration file specifies a value for the Handlers dnr:updateProcessor property which cannot be loaded as an object which implements the ISparqlUpdateProcessor interface");
}
}
//Handler Settings
this._showUpdateForm = ConfigurationLoader.GetConfigurationBoolean(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyShowUpdateForm), this._showUpdateForm);
String defUpdateFile = ConfigurationLoader.GetConfigurationString(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyDefaultUpdateFile));
if (defUpdateFile != null)
{
defUpdateFile = ConfigurationLoader.ResolvePath(defUpdateFile);
if (File.Exists(defUpdateFile))
{
using (StreamReader reader = new StreamReader(defUpdateFile))
{
this._defaultUpdate = reader.ReadToEnd();
reader.Close();
}
}
}
//Then get the Protocol Processor to be used
procNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyProtocolProcessor));
if (procNode != null)
{
Object temp = ConfigurationLoader.LoadObject(g, procNode);
if (temp is ISparqlHttpProtocolProcessor)
{
this._protocolProcessor = (ISparqlHttpProtocolProcessor)temp;
}
else
{
throw new DotNetRdfConfigurationException("Unable to load SPARQL Server Configuration as the RDF configuration file specifies a value for the Handlers dnr:protocolProcessor property which cannot be loaded as an object which implements the ISparqlHttpProtocolProcessor interface");
}
}
if (this._queryProcessor == null && this._updateProcessor == null && this._protocolProcessor == null)
{
throw new DotNetRdfConfigurationException("Unable to load SPARQL Server Configuration as the RDF configuration file does not specify at least one of a Query/Update/Protocol processor for the server using the dnr:queryProcessor/dnr:updateProcessor/dnr:protocolProcessor properties");
}
//Get the Service Description Graph
INode descripNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyServiceDescription));
if (descripNode != null)
{
Object descrip = ConfigurationLoader.LoadObject(g, descripNode);
if (descrip is IGraph)
{
this._serviceDescription = (IGraph)descrip;
}
else
{
throw new DotNetRdfConfigurationException("Unable to set the Service Description Graph for the HTTP Handler identified by the Node '" + objNode.ToString() + "' as the value given for the dnr:serviceDescription property points to an Object which could not be loaded as an object which implements the required IGraph interface");
}
}
}
/// <summary>
/// Creates a new instance of the <c>SparqlPreprocessor</c> class.
/// </summary>
/// <param name="input">A text reader.</param>
/// <param name="syntax">SPARQL syntax level.</param>
public SparqlPreprocessor(TextReader input, SparqlQuerySyntax syntax) :
base(input, syntax)
{
}