/// <summary>
/// Creates a Match object.
/// </summary>
/// <param name="graph"> A graph to conduct a query on. </param>
/// <param name="variableMap"> An empty map of variables. </param>
/// <param name="executionHelper"> A match execution helper. </param>
/// <param name="matchNode"> A parse tree of match expression. </param>
/// <param name="exprInfo"> A query expression information. </param>
public MatchObject(Graph graph, VariableMap variableMap, IMatchExecutionHelper executionHelper, MatchNode matchNode, QueryExpressionInfo exprInfo)
{
if (executionHelper == null || matchNode == null || variableMap == null || graph == null)
{
throw new ArgumentNullException($"{this.GetType()}, passing null arguments to the constructor.");
}
this.helper = executionHelper;
MatchVisitor matchVisitor = new MatchVisitor(graph.nodeTables, graph.edgeTables);
matchNode.Accept(matchVisitor);
// Create real pattern and variableMap.
var result = matchVisitor.GetResult();
this.CheckParsedPatternCorrectness(result);
// Create matcher and pattern based on the name of matcher and pattern.
// Change if necessary .
this.pattern = MatchFactory.CreatePattern(helper.ParallelPatternMatcherName, helper.PatternName, variableMap, result);
// Now we have got enough information about results.
// After creating pattern the variable map is filled and we know extend of the results.
this.queryResults = new MatchFixedResults(this.helper.FixedArraySize, variableMap.GetCount(), executionHelper.ThreadCount);
this.matcher = MatchFactory.CreateMatcher(helper.ParallelPatternMatcherName, pattern, graph, this.queryResults, executionHelper);
}
/// <summary>
/// Creates Streamed Match object.
/// </summary>
/// <param name="graph"> Graph to conduct a query on. </param>
/// <param name="variableMap"> Empty map of variables. </param>
/// <param name="executionHelper"> Match execution helper. </param>
/// <param name="matchNode"> Parse tree of match expression. </param>
/// <param name="exprInfo"> A query expression information. </param>
public MatchObjectStreamed(Graph graph, VariableMap variableMap, IMatchExecutionHelper executionHelper, MatchNode matchNode, QueryExpressionInfo exprInfo)
{
if (executionHelper == null || matchNode == null || variableMap == null || graph == null)
{
throw new ArgumentNullException($"{this.GetType()}, passing null arguments to the constructor.");
}
this.helper = executionHelper;
MatchVisitor matchVisitor = new MatchVisitor(graph.nodeTables, graph.edgeTables);
matchNode.Accept(matchVisitor);
//Create real pattern and variableMap
var result = matchVisitor.GetResult();
this.CheckParsedPatternCorrectness(result);
// Create matcher and pattern based on the name of matcher and pattern
// Change if necessary
this.pattern = MatchFactory.CreatePattern(helper.ParallelPatternMatcherName, helper.PatternName, variableMap, result);
this.matcher = (IPatternMatcherStreamed)MatchFactory.CreateMatcher(helper.ParallelPatternMatcherName, pattern, graph, executionHelper);
}
