/// <summary>
/// Creates a parallel matchers.
/// Inits arrays of threads and matchers based on thread count.
/// </summary>
/// <param name="pattern"> Pattern to match. </param>
/// <param name="graph"> Graph to search on.</param>
/// <param name="executionHelper"> Query execution helper. </param>
public DFSParallelPatternMatcherStreamed(DFSPattern pattern, Graph graph, IMatchExecutionHelper executionHelper) : base(graph, executionHelper)
{
this.matchers = new ISingleThreadPatternMatcherStreamed[this.helper.ThreadCount];
for (int i = 0; i < this.helper.ThreadCount; i++)
{
this.matchers[i] = (ISingleThreadPatternMatcherStreamed)MatchFactory
.CreateMatcher(this.helper.SingleThreadPatternMatcherName, // Type of Matcher
i == 0 ? pattern : pattern.Clone(), // Cloning of pattern (one was already created)
graph,
i); // Matcher ID
}
}
/// <summary>
/// Starting vertices are implicitly set to entire graph.
/// </summary>
/// <param name="pat"> A pattern to find.</param>
/// <param name="gr"> A graph to search. </param>
protected DFSPatternMatcherBase(IDFSPattern pat, Graph gr)
{
if (gr == null || pat == null)
{
throw new ArgumentException($"{this.GetType()}, passed null to a constructor.");
}
this.graph = gr;
this.matchedElements = new Element[pat.AllNodeCount];
this.pattern = (DFSPattern)pat;
// Implicit range of vertices to iterate over the entire graph.
this.startVerticesIndex = 0;
this.startVerticesEndIndex = gr.vertices.Count;
}
/// <summary>
/// Creates a parallel matchers.
/// Inits arrays of threads and matchers based on thread count.
/// </summary>
/// <param name="pattern"> A pattern to match. </param>
/// <param name="graph"> A graph to search on.</param>
/// <param name="results"> Where to store results. </param>
/// <param name="executionHelper"> A query execution helper. </param>
public DFSParallelPatternMatcher(DFSPattern pattern, Graph graph, MatchFixedResults results, IMatchExecutionHelper executionHelper) : base(graph, executionHelper)
{
if (pattern == null || results == null)
{
throw new ArgumentNullException($"{this.GetType()}, passed a null to a construtor.");
}
this.matchers = new ISingleThreadPatternMatcher[this.helper.ThreadCount];
this.results = results;
for (int i = 0; i < this.helper.ThreadCount; i++)
{
this.matchers[i] = (ISingleThreadPatternMatcher)MatchFactory
.CreateMatcher(this.helper.SingleThreadPatternMatcherName, // Type of Matcher
i == 0 ? pattern : pattern.Clone(), // Cloning of pattern (one was already created)
graph,
results.GetMatcherResultsStorage(i)); // Result storage
}
}