private static void BuildInterpretationPlan(LGSPGraph graph)
{
graph.matchingState.patternGraph = BuildPatternGraph(graph);
PlanGraph planGraph = PlanGraphGenerator.GeneratePlanGraph(graph.Model, graph.statistics, graph.matchingState.patternGraph,
false, false, false, new Dictionary <PatternElement, SetValueType>());
PlanGraphGenerator.MarkMinimumSpanningArborescence(planGraph, graph.matchingState.patternGraph.name, false);
SearchPlanGraph searchPlanGraph = SearchPlanGraphGeneratorAndScheduler.GenerateSearchPlanGraph(planGraph);
ScheduledSearchPlan scheduledSearchPlan = SearchPlanGraphGeneratorAndScheduler.ScheduleSearchPlan(
searchPlanGraph, graph.matchingState.patternGraph, false, false);
InterpretationPlanBuilder builder = new InterpretationPlanBuilder(scheduledSearchPlan, searchPlanGraph, graph.Model);
graph.matchingState.interpretationPlan = builder.BuildInterpretationPlan("ComparisonMatcher_" + graph.GraphId);
++GraphMatchingState.numInterpretationPlans;
graph.matchingState.changesCounterAtInterpretationPlanBuilding = graph.changesCounterAtLastAnalyze;
Debug.Assert(graph.changesCounterAtLastAnalyze == graph.ChangesCounter);
#if LOG_ISOMORPHY_CHECKING
SourceBuilder sb = new SourceBuilder();
graph.matchingState.interpretationPlan.Dump(sb);
writer.WriteLine();
writer.WriteLine(sb.ToString());
writer.WriteLine();
writer.Flush();
#endif
}
/// <summary>
/// Parallelize the scheduled search plan for usage from a parallelized matcher
/// (non- is-matched-flag-based isomorphy checking)
/// </summary>
public static void Parallelize(LGSPMatchingPattern matchingPattern)
{
Debug.Assert(matchingPattern.patternGraph.schedulesIncludingNegativesAndIndependents.Length == 1);
ScheduledSearchPlan ssp = matchingPattern.patternGraph.schedulesIncludingNegativesAndIndependents[0];
matchingPattern.patternGraph.parallelizedSchedule = new ScheduledSearchPlan[1];
List <SearchOperation> operations = new List <SearchOperation>(ssp.Operations.Length);
for (int i = 0; i < ssp.Operations.Length; ++i)
{
SearchOperation so = ssp.Operations[i];
SearchOperation clone = (SearchOperation)so.Clone();
clone.Isomorphy.Parallel = true;
operations.Add(clone);
if (clone.Element is PatternCondition)
{
SetNeedForParallelizedVersion((clone.Element as PatternCondition).ConditionExpression);
}
}
ScheduledSearchPlan clonedSsp = new ScheduledSearchPlan(
matchingPattern.patternGraph, operations.ToArray(), operations.Count > 0 ? operations[0].CostToEnd : 0);
matchingPattern.patternGraph.parallelizedSchedule[0] = clonedSsp;
ParallelizeNegativeIndependent(clonedSsp);
ParallelizeAlternativeIterated(matchingPattern.patternGraph);
ParallelizeYielding(matchingPattern.patternGraph);
}
public static void Explain(ScheduledSearchPlan ssp, SourceBuilder sb, IGraphModel model)
{
foreach (SearchOperation searchOp in ssp.Operations)
{
Explain(searchOp, sb, model);
}
}
public static IDictionary <PatternElement, SetValueType> ExtractOwnElements(ScheduledSearchPlan nestingScheduledSearchPlan, PatternGraph patternGraph)
{
Dictionary <PatternElement, SetValueType> ownElements = new Dictionary <PatternElement, SetValueType>();
// elements contained in the schedule of the nesting pattern, that are declared in the current pattern graph
// stem from inlining an indepent, extract them to treat them specially in search plan building (preset from nesting pattern)
if (nestingScheduledSearchPlan != null)
{
for (int i = 0; i < nestingScheduledSearchPlan.Operations.Length; ++i)
{
if (nestingScheduledSearchPlan.Operations[i].Type == SearchOperationType.Condition ||
nestingScheduledSearchPlan.Operations[i].Type == SearchOperationType.AssignVar ||
nestingScheduledSearchPlan.Operations[i].Type == SearchOperationType.DefToBeYieldedTo)
{
continue;
}
SearchPlanNode spn = (SearchPlanNode)nestingScheduledSearchPlan.Operations[i].Element;
if (spn.PatternElement.pointOfDefinition == patternGraph)
{
ownElements.Add(spn.PatternElement.OriginalIndependentElement, null);
}
}
}
return(ownElements);
}
/// <summary>
/// Appends homomorphy information to each operation of the scheduled search plan
/// </summary>
public static void AppendHomomorphyInformation(IGraphModel model, ScheduledSearchPlan ssp)
{
// no operation -> nothing which could be homomorph
if (ssp.Operations.Length == 0)
{
return;
}
// iterate operations of the search plan to append homomorphy checks
for (int i = 0; i < ssp.Operations.Length; ++i)
{
if (ssp.Operations[i].Type == SearchOperationType.Condition ||
ssp.Operations[i].Type == SearchOperationType.AssignVar ||
ssp.Operations[i].Type == SearchOperationType.DefToBeYieldedTo ||
ssp.Operations[i].Type == SearchOperationType.InlinedIndependentCheckForDuplicateMatch)
{
continue;
}
if (ssp.Operations[i].Type == SearchOperationType.NegativePattern)
{
AppendHomomorphyInformation(model, (ScheduledSearchPlan)ssp.Operations[i].Element);
continue;
}
if (ssp.Operations[i].Type == SearchOperationType.IndependentPattern)
{
AppendHomomorphyInformation(model, (ScheduledSearchPlan)ssp.Operations[i].Element);
continue;
}
DetermineAndAppendHomomorphyChecks(model, ssp, i);
}
}
private static void DumpScheduledSearchPlan(ScheduledSearchPlan ssp, IGraphModel model, String dumpname)
{
StreamWriter sw = new StreamWriter(dumpname + "-scheduledsp.txt", false);
SourceBuilder sb = new SourceBuilder();
ScheduleExplainer.Explain(ssp, sb, model);
sb.Append("\n");
sw.WriteLine(sb.ToString());
sw.Close();
}
public object Clone()
{
ScheduledSearchPlan ssp = new ScheduledSearchPlan(PatternGraph, new SearchOperation[Operations.Length], Cost);
for (int i = 0; i < Operations.Length; ++i)
{
ssp.Operations[i] = (SearchOperation)Operations[i].Clone();
}
return(ssp);
}
/// <summary>
/// Non- is-matched-flag-based isomorphy checking for nested alternative cases/iterateds
/// </summary>
private static void ParallelizeAlternativeIterated(PatternGraph patternGraph)
{
foreach (Alternative alt in patternGraph.alternativesPlusInlined)
{
foreach (PatternGraph altCase in alt.alternativeCases)
{
ScheduledSearchPlan ssp = altCase.schedulesIncludingNegativesAndIndependents[0];
altCase.parallelizedSchedule = new ScheduledSearchPlan[1];
List <SearchOperation> operations = new List <SearchOperation>(ssp.Operations.Length);
for (int i = 0; i < ssp.Operations.Length; ++i)
{
SearchOperation so = ssp.Operations[i];
SearchOperation clone = (SearchOperation)so.Clone();
clone.Isomorphy.Parallel = true;
operations.Add(clone);
if (clone.Element is PatternCondition)
{
SetNeedForParallelizedVersion((clone.Element as PatternCondition).ConditionExpression);
}
}
ScheduledSearchPlan clonedSsp = new ScheduledSearchPlan(
altCase, operations.ToArray(), operations.Count > 0 ? operations[0].CostToEnd : 0);
altCase.parallelizedSchedule[0] = clonedSsp;
ParallelizeNegativeIndependent(clonedSsp);
ParallelizeAlternativeIterated(altCase);
ParallelizeYielding(altCase);
}
}
foreach (Iterated iter in patternGraph.iteratedsPlusInlined)
{
ScheduledSearchPlan ssp = iter.iteratedPattern.schedulesIncludingNegativesAndIndependents[0];
iter.iteratedPattern.parallelizedSchedule = new ScheduledSearchPlan[1];
List <SearchOperation> operations = new List <SearchOperation>(ssp.Operations.Length);
for (int i = 0; i < ssp.Operations.Length; ++i)
{
SearchOperation so = ssp.Operations[i];
SearchOperation clone = (SearchOperation)so.Clone();
clone.Isomorphy.Parallel = true;
operations.Add(clone);
if (clone.Element is PatternCondition)
{
SetNeedForParallelizedVersion((clone.Element as PatternCondition).ConditionExpression);
}
}
ScheduledSearchPlan clonedSsp = new ScheduledSearchPlan(
iter.iteratedPattern, operations.ToArray(), operations.Count > 0 ? operations[0].CostToEnd : 0);
iter.iteratedPattern.parallelizedSchedule[0] = clonedSsp;
ParallelizeNegativeIndependent(clonedSsp);
ParallelizeAlternativeIterated(iter.iteratedPattern);
ParallelizeYielding(iter.iteratedPattern);
}
}
public static void DumpScheduledSearchPlanAsVcg(ScheduledSearchPlan ssp, IGraphModel model, String dumpname)
{
StreamWriter sw = new StreamWriter(dumpname + "-scheduledsp.vcg", false);
sw.WriteLine("graph:{\ninfoname 1: \"Attributes\"\ndisplay_edge_labels: no\nport_sharing: no\nsplines: no\n"
+ "\nmanhattan_edges: no\nsmanhattan_edges: no\norientation: bottom_to_top\nedges: yes\nnodes: yes\nclassname 1: \"normal\"");
sw.WriteLine("node:{title:\"root\" label:\"ROOT\"}\n");
SearchPlanNode root = new SearchPlanNode("root");
sw.WriteLine("graph:{{title:\"pattern\" label:\"{0}\" status:clustered color:lightgrey", dumpname);
foreach (SearchOperation op in ssp.Operations)
{
switch (op.Type)
{
case SearchOperationType.Lookup:
case SearchOperationType.Incoming:
case SearchOperationType.Outgoing:
case SearchOperationType.ImplicitSource:
case SearchOperationType.ImplicitTarget:
{
SearchPlanNode spnode = (SearchPlanNode)op.Element;
DumpNode(sw, spnode);
SearchPlanNode src;
switch (op.Type)
{
case SearchOperationType.Lookup:
case SearchOperationType.ActionPreset:
case SearchOperationType.NegIdptPreset:
src = root;
break;
default:
src = op.SourceSPNode;
break;
}
DumpEdge(sw, op.Type, src, spnode, op.CostToEnd, false);
break;
}
case SearchOperationType.Condition:
sw.WriteLine("node:{title:\"Condition\" label:\"CONDITION\"}\n");
break;
case SearchOperationType.NegativePattern:
sw.WriteLine("node:{title:\"NAC\" label:\"NAC\"}\n");
break;
}
}
}
/// <summary>
/// Non- is-matched-flag-based isomorphy checking for nested negatives/independents,
/// patch into already cloned parallel ssp
/// </summary>
private static void ParallelizeNegativeIndependent(ScheduledSearchPlan ssp)
{
foreach (SearchOperation so in ssp.Operations)
{
so.Isomorphy.Parallel = true;
if (so.Type == SearchOperationType.NegativePattern ||
so.Type == SearchOperationType.IndependentPattern)
{
ScheduledSearchPlan nestedSsp = (ScheduledSearchPlan)so.Element;
List <SearchOperation> operations = new List <SearchOperation>(nestedSsp.Operations.Length);
for (int i = 0; i < nestedSsp.Operations.Length; ++i)
{
SearchOperation nestedSo = nestedSsp.Operations[i];
SearchOperation clone = (SearchOperation)nestedSo.Clone();
operations.Add(clone);
if (clone.Element is PatternCondition)
{
SetNeedForParallelizedVersion((clone.Element as PatternCondition).ConditionExpression);
}
}
Debug.Assert(nestedSsp.PatternGraph.parallelizedSchedule == null); // may fire in case explain was used before, ignore it then
nestedSsp.PatternGraph.parallelizedSchedule = new ScheduledSearchPlan[1];
ScheduledSearchPlan clonedSsp = new ScheduledSearchPlan(
nestedSsp.PatternGraph, operations.ToArray(), operations.Count > 0 ? operations[0].CostToEnd : 0);
nestedSsp.PatternGraph.parallelizedSchedule[0] = clonedSsp;
so.Element = clonedSsp;
ParallelizeNegativeIndependent(clonedSsp);
ParallelizeAlternativeIterated(nestedSsp.PatternGraph);
if (so.Type == SearchOperationType.IndependentPattern)
{
ParallelizeYielding(nestedSsp.PatternGraph);
}
}
}
}
/// <summary>
/// Creates an interpretation plan builder for the given scheduled search plan.
/// Only a limited amount of search operations is supported, the ones needed for isomorphy checking.
/// </summary>
/// <param name="ssp">the scheduled search plan to build an interpretation plan for</param>
/// <param name="spg">the search plan graph for determining the pattern element needed for attribute checking</param>
/// <param name="model">the model over which the patterns are to be searched</param>
public InterpretationPlanBuilder(ScheduledSearchPlan ssp, SearchPlanGraph spg, IGraphModel model)
{
this.ssp = ssp;
this.spg = spg;
this.model = model;
}
/// <summary>
/// Determines which homomorphy check operations are necessary
/// at the operation of the given position within the scheduled search plan
/// and appends them.
/// </summary>
private static void DetermineAndAppendHomomorphyChecks(IGraphModel model, ScheduledSearchPlan ssp, int j)
{
// take care of global homomorphy
FillInGlobalHomomorphyPatternElements(ssp, j);
///////////////////////////////////////////////////////////////////////////
// first handle special case pure homomorphy
SearchPlanNode spn_j = (SearchPlanNode)ssp.Operations[j].Element;
if (spn_j.ElementID == -1)
{
// inlined from independent for better matching, independent from the rest
return;
}
bool homToAll = true;
if (spn_j.NodeType == PlanNodeType.Node)
{
for (int i = 0; i < ssp.PatternGraph.nodesPlusInlined.Length; ++i)
{
if (!ssp.PatternGraph.homomorphicNodes[spn_j.ElementID - 1, i])
{
homToAll = false;
break;
}
}
}
else //(spn_j.NodeType == PlanNodeType.Edge)
{
for (int i = 0; i < ssp.PatternGraph.edgesPlusInlined.Length; ++i)
{
if (!ssp.PatternGraph.homomorphicEdges[spn_j.ElementID - 1, i])
{
homToAll = false;
break;
}
}
}
if (homToAll)
{
// operation is allowed to be homomorph with everything
// no checks for isomorphy or restricted homomorphy needed at all
return;
}
///////////////////////////////////////////////////////////////////////////
// no pure homomorphy, so we have restricted homomorphy or isomorphy
// and need to inspect the operations before, together with the homomorphy matrix
// for determining the necessary homomorphy checks
GraphElementType[] types;
bool[,] hom;
if (spn_j.NodeType == PlanNodeType.Node)
{
types = model.NodeModel.Types;
hom = ssp.PatternGraph.homomorphicNodes;
}
else // (spn_j.NodeType == PlanNodeType.Edge)
{
types = model.EdgeModel.Types;
hom = ssp.PatternGraph.homomorphicEdges;
}
// order operation to check against all elements it's not allowed to be homomorph to
// iterate through the operations before our position
bool homomorphyPossibleAndAllowed = false;
for (int i = 0; i < j; ++i)
{
// only check operations computing nodes or edges
if (ssp.Operations[i].Type == SearchOperationType.Condition ||
ssp.Operations[i].Type == SearchOperationType.NegativePattern ||
ssp.Operations[i].Type == SearchOperationType.IndependentPattern ||
ssp.Operations[i].Type == SearchOperationType.Assign ||
ssp.Operations[i].Type == SearchOperationType.AssignVar ||
ssp.Operations[i].Type == SearchOperationType.DefToBeYieldedTo ||
ssp.Operations[i].Type == SearchOperationType.InlinedIndependentCheckForDuplicateMatch)
{
continue;
}
SearchPlanNode spn_i = (SearchPlanNode)ssp.Operations[i].Element;
if (spn_i.NodeType != spn_j.NodeType)
{
// don't compare nodes with edges
continue;
}
if (spn_i.ElementID == -1)
{
// inlined from independent for better matching, independent from the rest
continue;
}
// find out whether element types are disjoint
GraphElementType type_i = types[spn_i.PatternElement.TypeID];
GraphElementType type_j = types[spn_j.PatternElement.TypeID];
bool disjoint = true;
foreach (GraphElementType subtype_i in type_i.SubOrSameTypes)
{
if (type_j.IsA(subtype_i) || subtype_i.IsA(type_j)) // IsA==IsSuperTypeOrSameType
{
disjoint = false;
break;
}
}
if (disjoint)
{
// don't check elements if their types are disjoint
continue;
}
// at this position we found out that spn_i and spn_j
// might get matched to the same host graph element, i.e. homomorphy is possible
// if that's ok we don't need to insert checks to prevent this from happening
if (hom[spn_i.ElementID - 1, spn_j.ElementID - 1])
{
homomorphyPossibleAndAllowed = true;
continue;
}
// otherwise the generated matcher code has to check
// that pattern element j doesn't get bound to the same graph element
// the pattern element i is already bound to
if (ssp.Operations[j].Isomorphy.PatternElementsToCheckAgainst == null)
{
ssp.Operations[j].Isomorphy.PatternElementsToCheckAgainst = new List <SearchPlanNode>();
}
ssp.Operations[j].Isomorphy.PatternElementsToCheckAgainst.Add(spn_i);
// if spn_j might get matched to the same host graph element as spn_i and this is not allowed
// make spn_i set the is-matched-bit so that spn_j can detect this situation
ssp.Operations[i].Isomorphy.SetIsMatchedBit = true;
}
// only if elements, the operation must be isomorph to, were matched before
// (otherwise there were only elements, the operation is allowed to be homomorph to,
// matched before, so no check needed here)
if (ssp.Operations[j].Isomorphy.PatternElementsToCheckAgainst != null &&
ssp.Operations[j].Isomorphy.PatternElementsToCheckAgainst.Count > 0)
{
// order operation to check whether the is-matched-bit is set
ssp.Operations[j].Isomorphy.CheckIsMatchedBit = true;
}
// if no check for isomorphy was skipped due to homomorphy being allowed
// pure isomorphy is to be guaranteed - simply check the is-matched-bit and be done
// the pattern elements to check against are only needed
// if spn_j is allowed to be homomorph to some elements but must be isomorph to some others
if (ssp.Operations[j].Isomorphy.CheckIsMatchedBit && !homomorphyPossibleAndAllowed)
{
ssp.Operations[j].Isomorphy.PatternElementsToCheckAgainst = null;
}
}
/// <summary>
/// Parallelize the scheduled search plan to the branching factor,
/// splitting it at the first loop into a header part and a body part
/// </summary>
public static void ParallelizeHeadBody(LGSPRulePattern rulePattern)
{
Debug.Assert(rulePattern.patternGraph.schedulesIncludingNegativesAndIndependents.Length == 1);
ScheduledSearchPlan ssp = rulePattern.patternGraph.schedulesIncludingNegativesAndIndependents[0];
int indexToSplitAt = 0;
for (int i = 0; i < ssp.Operations.Length; ++i)
{
SearchOperation so = ssp.Operations[i];
if (so.Type == SearchOperationType.Lookup || so.Type == SearchOperationType.Incident ||
so.Type == SearchOperationType.Incoming || so.Type == SearchOperationType.Outgoing ||
so.Type == SearchOperationType.PickFromStorage || so.Type == SearchOperationType.PickFromStorageDependent ||
so.Type == SearchOperationType.PickFromIndex || so.Type == SearchOperationType.PickFromIndexDependent)
{
indexToSplitAt = i;
break;
}
}
rulePattern.patternGraph.parallelizedSchedule = new ScheduledSearchPlan[2];
List <SearchOperation> headOperations = new List <SearchOperation>();
List <SearchOperation> bodyOperations = new List <SearchOperation>();
for (int i = 0; i < rulePattern.Inputs.Length; ++i)
{
if (rulePattern.Inputs[i] is VarType) // those don't appear in the schedule, they are only extracted into the search program
{
VarType varType = (VarType)rulePattern.Inputs[i];
String varName = rulePattern.InputNames[i];
PatternVariable dummy = new PatternVariable(varType, varName, varName, i, false, null);
headOperations.Add(new SearchOperation(SearchOperationType.WriteParallelPresetVar,
dummy, null, 0));
bodyOperations.Add(new SearchOperation(SearchOperationType.ParallelPresetVar,
dummy, null, 0));
}
}
for (int i = 0; i < ssp.Operations.Length; ++i)
{
SearchOperation so = ssp.Operations[i];
if (i < indexToSplitAt)
{
SearchOperation clone = (SearchOperation)so.Clone();
clone.Isomorphy.Parallel = true;
clone.Isomorphy.LockForAllThreads = true;
headOperations.Add(clone);
switch (so.Type)
{
// the target binding looping operations can't appear in the header, so we don't treat them here
// the non-target binding operations are completely handled by just adding them, happended already above
// the target binding non-looping operations are handled below,
// by parallel preset writing in the header and reading in the body
// with exception of def, its declaration and initializion is just re-executed in the body
// some presets can't appear in an action header, they are thus not taken care of
case SearchOperationType.ActionPreset:
case SearchOperationType.MapWithStorage:
case SearchOperationType.MapWithStorageDependent:
case SearchOperationType.Cast:
case SearchOperationType.Assign:
case SearchOperationType.Identity:
case SearchOperationType.ImplicitSource:
case SearchOperationType.ImplicitTarget:
case SearchOperationType.Implicit:
headOperations.Add(new SearchOperation(SearchOperationType.WriteParallelPreset,
(SearchPlanNode)so.Element, so.SourceSPNode, 0));
bodyOperations.Add(new SearchOperation(SearchOperationType.ParallelPreset,
(SearchPlanNode)so.Element, so.SourceSPNode, 0));
break;
case SearchOperationType.AssignVar:
headOperations.Add(new SearchOperation(SearchOperationType.WriteParallelPresetVar,
(PatternVariable)so.Element, so.SourceSPNode, 0));
bodyOperations.Add(new SearchOperation(SearchOperationType.ParallelPresetVar,
(PatternVariable)so.Element, so.SourceSPNode, 0));
break;
case SearchOperationType.DefToBeYieldedTo:
bodyOperations.Add((SearchOperation)so.Clone());
break;
}
}
else if (i == indexToSplitAt)
{
SearchOperation cloneHead;
SearchOperation cloneBody;
switch (so.Type)
{
case SearchOperationType.Lookup:
cloneHead = (SearchOperation)so.Clone(SearchOperationType.SetupParallelLookup);
cloneBody = (SearchOperation)so.Clone(SearchOperationType.ParallelLookup);
break;
case SearchOperationType.Incident:
cloneHead = (SearchOperation)so.Clone(SearchOperationType.SetupParallelIncident);
cloneBody = (SearchOperation)so.Clone(SearchOperationType.ParallelIncident);
break;
case SearchOperationType.Incoming:
cloneHead = (SearchOperation)so.Clone(SearchOperationType.SetupParallelIncoming);
cloneBody = (SearchOperation)so.Clone(SearchOperationType.ParallelIncoming);
break;
case SearchOperationType.Outgoing:
cloneHead = (SearchOperation)so.Clone(SearchOperationType.SetupParallelOutgoing);
cloneBody = (SearchOperation)so.Clone(SearchOperationType.ParallelOutgoing);
break;
case SearchOperationType.PickFromStorage:
cloneHead = (SearchOperation)so.Clone(SearchOperationType.SetupParallelPickFromStorage);
cloneBody = (SearchOperation)so.Clone(SearchOperationType.ParallelPickFromStorage);
break;
case SearchOperationType.PickFromStorageDependent:
cloneHead = (SearchOperation)so.Clone(SearchOperationType.SetupParallelPickFromStorageDependent);
cloneBody = (SearchOperation)so.Clone(SearchOperationType.ParallelPickFromStorageDependent);
break;
case SearchOperationType.PickFromIndex:
cloneHead = (SearchOperation)so.Clone(SearchOperationType.SetupParallelPickFromIndex);
cloneBody = (SearchOperation)so.Clone(SearchOperationType.ParallelPickFromIndex);
break;
case SearchOperationType.PickFromIndexDependent:
cloneHead = (SearchOperation)so.Clone(SearchOperationType.SetupParallelPickFromIndexDependent);
cloneBody = (SearchOperation)so.Clone(SearchOperationType.ParallelPickFromIndexDependent);
break;
default: // failure, operation at this index cannot be parallelized/parallelization not supported
cloneHead = null;
cloneBody = null;
break;
}
headOperations.Add(cloneHead);
cloneBody.Isomorphy.Parallel = true;
bodyOperations.Add(cloneBody);
}
else
{
SearchOperation clone = (SearchOperation)so.Clone();
clone.Isomorphy.Parallel = true;
bodyOperations.Add(clone);
if (clone.Element is PatternCondition)
{
SetNeedForParallelizedVersion((clone.Element as PatternCondition).ConditionExpression);
}
}
}
ScheduledSearchPlan headSsp = new ScheduledSearchPlan(
rulePattern.patternGraph, headOperations.ToArray(), headOperations.Count > 0 ? headOperations[0].CostToEnd : 0);
rulePattern.patternGraph.parallelizedSchedule[0] = headSsp;
ScheduledSearchPlan bodySsp = new ScheduledSearchPlan(
rulePattern.patternGraph, bodyOperations.ToArray(), bodyOperations.Count > 0 ? bodyOperations[0].CostToEnd : 0);
rulePattern.patternGraph.parallelizedSchedule[1] = bodySsp;
ParallelizeNegativeIndependent(bodySsp);
ParallelizeAlternativeIterated(rulePattern.patternGraph);
ParallelizeYielding(rulePattern.patternGraph);
}
/// <summary>
/// Inserts schedules of negative and independent pattern graphs into the schedule of the enclosing pattern graph
/// for the schedule with the given array index
/// </summary>
private static void InsertNegativesAndIndependentsIntoSchedule(PatternGraph patternGraph, int index, bool lazyNegativeIndependentConditionEvaluation)
{
// todo: erst implicit node, dann negative/independent, auch wenn negative/independent mit erstem implicit moeglich wird
patternGraph.schedulesIncludingNegativesAndIndependents[index] = null; // an explain might have filled this
List <SearchOperation> operations = new List <SearchOperation>();
for (int i = 0; i < patternGraph.schedules[index].Operations.Length; ++i)
{
operations.Add(patternGraph.schedules[index].Operations[i]);
}
// nested patterns on the way to an enclosed patternpath modifier
// must get matched after all local nodes and edges, because they require
// all outer elements to be known in order to lock them for patternpath processing
if (patternGraph.patternGraphsOnPathToEnclosedPatternpath
.Contains(patternGraph.pathPrefix + patternGraph.name))
{
operations.Add(new SearchOperation(SearchOperationType.LockLocalElementsForPatternpath, null, null,
patternGraph.schedules[index].Operations.Length != 0 ? patternGraph.schedules[index].Operations[patternGraph.schedules[index].Operations.Length - 1].CostToEnd : 0));
}
// iterate over all negative scheduled search plans (TODO: order?)
for (int i = 0; i < patternGraph.negativePatternGraphsPlusInlined.Length; ++i)
{
ScheduledSearchPlan negSchedule = patternGraph.negativePatternGraphsPlusInlined[i].schedulesIncludingNegativesAndIndependents[0];
int bestFitIndex = operations.Count;
float bestFitCostToEnd = 0;
// find best place in scheduled search plan for current negative pattern
// during search from end of schedule forward until the first element the negative pattern is dependent on is found
for (int j = operations.Count - 1; j >= 0; --j)
{
SearchOperation op = operations[j];
if (op.Type == SearchOperationType.Condition ||
op.Type == SearchOperationType.NegativePattern ||
op.Type == SearchOperationType.IndependentPattern ||
op.Type == SearchOperationType.AssignVar)
{
continue;
}
if (lazyNegativeIndependentConditionEvaluation)
{
break;
}
if (op.Type == SearchOperationType.LockLocalElementsForPatternpath ||
op.Type == SearchOperationType.DefToBeYieldedTo)
{
break; // LockLocalElementsForPatternpath and DefToBeYieldedTo are barriers for neg/idpt
}
if (patternGraph.negativePatternGraphsPlusInlined[i].neededNodes.ContainsKey(((SearchPlanNode)op.Element).PatternElement.Name) ||
patternGraph.negativePatternGraphsPlusInlined[i].neededEdges.ContainsKey(((SearchPlanNode)op.Element).PatternElement.Name))
{
break;
}
if (negSchedule.Cost <= op.CostToEnd)
{
// best fit as CostToEnd is monotonously growing towards operation[0]
bestFitIndex = j;
bestFitCostToEnd = op.CostToEnd;
}
}
// insert pattern at best position
operations.Insert(bestFitIndex, new SearchOperation(SearchOperationType.NegativePattern,
negSchedule, null, bestFitCostToEnd + negSchedule.Cost));
// update costs of operations before best position
for (int j = 0; j < bestFitIndex; ++j)
{
operations[j].CostToEnd += negSchedule.Cost;
}
}
// iterate over all independent scheduled search plans (TODO: order?)
for (int i = 0; i < patternGraph.independentPatternGraphsPlusInlined.Length; ++i)
{
ScheduledSearchPlan idptSchedule = patternGraph.independentPatternGraphsPlusInlined[i].schedulesIncludingNegativesAndIndependents[0];
int bestFitIndex = operations.Count;
float bestFitCostToEnd = 0;
IDictionary <PatternElement, SetValueType> presetsFromIndependentInlining = ExtractOwnElements(patternGraph.schedules[index], patternGraph.independentPatternGraphsPlusInlined[i]);
// find best place in scheduled search plan for current independent pattern
// during search from end of schedule forward until the first element the independent pattern is dependent on is found
for (int j = operations.Count - 1; j >= 0; --j)
{
SearchOperation op = operations[j];
if (op.Type == SearchOperationType.Condition ||
op.Type == SearchOperationType.NegativePattern ||
op.Type == SearchOperationType.IndependentPattern ||
op.Type == SearchOperationType.AssignVar)
{
continue;
}
if (lazyNegativeIndependentConditionEvaluation)
{
break;
}
if (op.Type == SearchOperationType.LockLocalElementsForPatternpath ||
op.Type == SearchOperationType.DefToBeYieldedTo)
{
break; // LockLocalElementsForPatternpath and DefToBeYieldedTo are barriers for neg/idpt
}
PatternElement pe = ((SearchPlanNode)op.Element).PatternElement;
if (patternGraph.independentPatternGraphsPlusInlined[i].neededNodes.ContainsKey(pe.Name) ||
patternGraph.independentPatternGraphsPlusInlined[i].neededEdges.ContainsKey(pe.Name))
{
break;
}
if (pe.OriginalIndependentElement != null &&
presetsFromIndependentInlining.ContainsKey(pe.OriginalIndependentElement))
{
break;
}
if (idptSchedule.Cost <= op.CostToEnd)
{
// best fit as CostToEnd is monotonously growing towards operation[0]
bestFitIndex = j;
bestFitCostToEnd = op.CostToEnd;
}
}
// insert pattern at best position
operations.Insert(bestFitIndex, new SearchOperation(SearchOperationType.IndependentPattern,
idptSchedule, null, bestFitCostToEnd + idptSchedule.Cost));
// update costs of operations before best position
for (int j = 0; j < bestFitIndex; ++j)
{
operations[j].CostToEnd += idptSchedule.Cost;
}
}
InsertInlinedIndependentCheckForDuplicateMatch(operations);
float cost = operations.Count > 0 ? operations[0].CostToEnd : 0;
patternGraph.schedulesIncludingNegativesAndIndependents[index] =
new ScheduledSearchPlan(patternGraph, operations.ToArray(), cost);
}
/// <summary>
/// fill in globally homomorphic elements as exception to global isomorphy check
/// </summary>
private static void FillInGlobalHomomorphyPatternElements(ScheduledSearchPlan ssp, int j)
{
SearchPlanNode spn_j = (SearchPlanNode)ssp.Operations[j].Element;
if (spn_j.NodeType == PlanNodeType.Node)
{
if (spn_j.ElementID == -1 || // inlined from independent for better matching, independent from the rest
ssp.PatternGraph.totallyHomomorphicNodes[spn_j.ElementID - 1])
{
ssp.Operations[j].Isomorphy.TotallyHomomorph = true;
return; // iso-exceptions to totally hom are handled with non-global iso checks
}
}
else
{
if (spn_j.ElementID == -1 || // inlined from independent for better matching, independent from the rest
ssp.PatternGraph.totallyHomomorphicEdges[spn_j.ElementID - 1])
{
ssp.Operations[j].Isomorphy.TotallyHomomorph = true;
return; // iso-exceptions to totally hom are handled with non-global iso checks
}
}
bool[,] homGlobal;
if (spn_j.NodeType == PlanNodeType.Node)
{
homGlobal = ssp.PatternGraph.homomorphicNodesGlobal;
}
else // (spn_j.NodeType == PlanNodeType.Edge)
{
homGlobal = ssp.PatternGraph.homomorphicEdgesGlobal;
}
// iterate through the operations before our position
for (int i = 0; i < j; ++i)
{
// only check operations computing nodes or edges
if (ssp.Operations[i].Type == SearchOperationType.Condition ||
ssp.Operations[i].Type == SearchOperationType.NegativePattern ||
ssp.Operations[i].Type == SearchOperationType.IndependentPattern ||
ssp.Operations[i].Type == SearchOperationType.Assign ||
ssp.Operations[i].Type == SearchOperationType.AssignVar ||
ssp.Operations[i].Type == SearchOperationType.DefToBeYieldedTo ||
ssp.Operations[i].Type == SearchOperationType.InlinedIndependentCheckForDuplicateMatch)
{
continue;
}
SearchPlanNode spn_i = (SearchPlanNode)ssp.Operations[i].Element;
if (spn_i.NodeType != spn_j.NodeType)
{
// don't compare nodes with edges
continue;
}
if (spn_i.ElementID == -1)
{
// inlined from independent for better matching, independent from the rest
continue;
}
// in global isomorphy check at current position
// allow globally homomorphic elements as exception
// if they were already defined(preset)
if (homGlobal[spn_j.ElementID - 1, spn_i.ElementID - 1])
{
if (ssp.Operations[j].Isomorphy.GloballyHomomorphPatternElements == null)
{
ssp.Operations[j].Isomorphy.GloballyHomomorphPatternElements = new List <SearchPlanNode>();
}
ssp.Operations[j].Isomorphy.GloballyHomomorphPatternElements.Add(spn_i);
}
}
}
/// <summary>
/// Builds search program for alternative from scheduled search plans of the alternative cases
/// </summary>
public static SearchProgram BuildSearchProgram(
IGraphModel model,
LGSPMatchingPattern matchingPattern,
Alternative alternative,
bool parallelized,
bool emitProfiling)
{
String rulePatternClassName = NamesOfEntities.RulePatternClassName(matchingPattern.name, matchingPattern.PatternGraph.Package, !(matchingPattern is LGSPRulePattern));
// build combined list of namesOfPatternGraphsOnPathToEnclosedPatternpath
// from the namesOfPatternGraphsOnPathToEnclosedPatternpath of the alternative cases
// also build combined lists of matching pattern class type names and nested independents
List <string> namesOfPatternGraphsOnPathToEnclosedPatternpath = new List <string>();
List <string> matchingPatternClassTypeNames = new List <string>();
List <Dictionary <PatternGraph, bool> > nestedIndependents = new List <Dictionary <PatternGraph, bool> >();
for (int i = 0; i < alternative.alternativeCases.Length; ++i)
{
PatternGraph altCase = alternative.alternativeCases[i];
foreach (String name in altCase.patternGraphsOnPathToEnclosedPatternpath)
{
if (!namesOfPatternGraphsOnPathToEnclosedPatternpath.Contains(name))
{
namesOfPatternGraphsOnPathToEnclosedPatternpath.Add(name);
}
}
ExtractNestedIndependents(matchingPatternClassTypeNames, nestedIndependents, matchingPattern, altCase);
}
// build outermost search program operation, create the list anchor starting its program
SearchProgram searchProgram = new SearchProgramOfAlternative(
rulePatternClassName,
namesOfPatternGraphsOnPathToEnclosedPatternpath,
"myMatch",
matchingPatternClassTypeNames, nestedIndependents,
parallelized);
searchProgram.OperationsList = new SearchProgramList(searchProgram);
SearchProgramOperation insertionPoint = searchProgram.OperationsList;
// initialize task/result-pushdown handling in subpattern matcher
InitializeSubpatternMatching initialize =
new InitializeSubpatternMatching(InitializeFinalizeSubpatternMatchingType.Normal);
insertionPoint = insertionPoint.Append(initialize);
// build alternative matching search programs, one per case
for (int i = 0; i < alternative.alternativeCases.Length; ++i)
{
PatternGraph altCase = alternative.alternativeCases[i];
ScheduledSearchPlan scheduledSearchPlan = altCase.schedulesIncludingNegativesAndIndependents[0];
string inlinedPatternClassName = rulePatternClassName;
string pathPrefixInInlinedPatternClass = scheduledSearchPlan.PatternGraph.pathPrefix;
string unprefixedNameInInlinedPatternClass = scheduledSearchPlan.PatternGraph.name;
if (alternative.originalAlternative != null)
{
inlinedPatternClassName = alternative.originalSubpatternEmbedding.matchingPatternOfEmbeddedGraph.GetType().Name;
pathPrefixInInlinedPatternClass = alternative.originalAlternative.pathPrefix + alternative.originalAlternative.name + "_";
unprefixedNameInInlinedPatternClass = alternative.originalAlternative.alternativeCases[i].name;
}
SearchProgramBodyBuilder builder = new SearchProgramBodyBuilder(
SearchProgramType.AlternativeCase,
model,
rulePatternClassName,
null,
null,
null,
altCase,
emitProfiling,
parallelized,
0
);
AlternativeCaseMatching alternativeCaseMatching = new AlternativeCaseMatching(
pathPrefixInInlinedPatternClass,
unprefixedNameInInlinedPatternClass,
inlinedPatternClassName,
builder.wasIndependentInlined(altCase, 0));
alternativeCaseMatching.OperationsList = new SearchProgramList(alternativeCaseMatching);
SearchProgramOperation continuationPointAfterAltCase = insertionPoint.Append(alternativeCaseMatching);
// at level of the current alt case
insertionPoint = alternativeCaseMatching.OperationsList;
insertionPoint = insertVariableDeclarations(insertionPoint, altCase);
// start building with first operation in scheduled search plan
builder.BuildScheduledSearchPlanOperationIntoSearchProgram(
0,
insertionPoint);
// back to level of alt cases
insertionPoint = continuationPointAfterAltCase;
// save matches found by alternative case to get clean start for matching next alternative case
if (i < alternative.alternativeCases.Length - 1)
{
NewMatchesListForFollowingMatches newMatchesList =
new NewMatchesListForFollowingMatches(true);
insertionPoint = insertionPoint.Append(newMatchesList);
}
}
// finalize task/result-pushdown handling in subpattern matcher
FinalizeSubpatternMatching finalize =
new FinalizeSubpatternMatching(InitializeFinalizeSubpatternMatchingType.Normal);
insertionPoint = insertionPoint.Append(finalize);
return(searchProgram);
}