/// <summary>
/// Inserts code to check whether iteration came to an end (pattern not found (again))
/// and code to handle that case
/// </summary>
private SearchProgramOperation insertEndOfIterationHandling(SearchProgramOperation insertionPoint)
{
Debug.Assert(NegativeIndependentNamePrefix(patternGraphWithNestingPatterns.Peek()) == "");
PatternGraph patternGraph = patternGraphWithNestingPatterns.Peek();
// check whether the pattern was not found / the null match was found
// if yes the iteration came to an end, handle that case
CheckContinueMatchingIteratedPatternNonNullMatchFound iteratedPatternFound =
new CheckContinueMatchingIteratedPatternNonNullMatchFound(patternGraph.isIterationBreaking);
SearchProgramOperation continuationPoint =
insertionPoint.Append(iteratedPatternFound);
iteratedPatternFound.CheckFailedOperations = new SearchProgramList(iteratedPatternFound);
insertionPoint = iteratedPatternFound.CheckFailedOperations;
// ---- initialize task/result-pushdown handling in subpattern matcher for end of iteration
InitializeSubpatternMatching initialize =
new InitializeSubpatternMatching(InitializeFinalizeSubpatternMatchingType.EndOfIteration);
insertionPoint = insertionPoint.Append(initialize);
// ---- ---- iteration pattern may be the last to be matched - handle that case
CheckContinueMatchingTasksLeft tasksLeft =
new CheckContinueMatchingTasksLeft();
SearchProgramOperation continuationPointAfterTasksLeft =
insertionPoint.Append(tasksLeft);
tasksLeft.CheckFailedOperations = new SearchProgramList(tasksLeft);
insertionPoint = tasksLeft.CheckFailedOperations;
// ---- ---- check failed, no tasks left, leaf subpattern was matched
string inlinedPatternClassName = rulePatternClassName;
string pathPrefixInInlinedPatternClass = patternGraph.pathPrefix;
string unprefixedNameInInlinedPatternClass = patternGraph.name;
if(patternGraph.originalPatternGraph != null)
{
inlinedPatternClassName = patternGraph.originalSubpatternEmbedding.matchingPatternOfEmbeddedGraph.GetType().Name;
pathPrefixInInlinedPatternClass = patternGraph.originalPatternGraph.pathPrefix;
unprefixedNameInInlinedPatternClass = patternGraph.originalPatternGraph.name;
}
LeafSubpatternMatched leafMatched = new LeafSubpatternMatched(
inlinedPatternClassName, pathPrefixInInlinedPatternClass + unprefixedNameInInlinedPatternClass, true);
insertionPoint = insertionPoint.Append(leafMatched);
leafMatched.MatchBuildingOperations = new SearchProgramList(leafMatched); // empty, no match object
// ---- ---- finalize task/result-pushdown handling in subpattern matcher for end of iteration
FinalizeSubpatternMatching finalize =
new FinalizeSubpatternMatching(InitializeFinalizeSubpatternMatchingType.EndOfIteration);
insertionPoint = insertionPoint.Append(finalize);
FinalizeSubpatternMatching finalizeIteration =
new FinalizeSubpatternMatching(InitializeFinalizeSubpatternMatchingType.Iteration);
insertionPoint = insertionPoint.Append(finalizeIteration);
ContinueOperation leave =
new ContinueOperation(ContinueOperationType.ByReturn, false, parallelized && indexOfSchedule == 1);
insertionPoint = insertionPoint.Append(leave);
// ---- nesting level up
insertionPoint = continuationPointAfterTasksLeft;
// ---- we execute the open subpattern matching tasks
MatchSubpatterns matchSubpatterns =
new MatchSubpatterns("", parallelized);
insertionPoint = insertionPoint.Append(matchSubpatterns);
// ---- check whether the open subpattern matching task succeeded, with null match building
insertionPoint = insertCheckForSubpatternsFound(insertionPoint, true);
// ---- finalize task/result-pushdown handling in subpattern matcher for end of iteration
finalize =
new FinalizeSubpatternMatching(InitializeFinalizeSubpatternMatchingType.EndOfIteration);
insertionPoint = insertionPoint.Append(finalize);
finalizeIteration =
new FinalizeSubpatternMatching(InitializeFinalizeSubpatternMatchingType.Iteration);
insertionPoint = insertionPoint.Append(finalizeIteration);
leave =
new ContinueOperation(ContinueOperationType.ByReturn, false, parallelized && indexOfSchedule == 1);
insertionPoint = insertionPoint.Append(leave);
// ---- nesting level up
insertionPoint = continuationPoint;
return insertionPoint;
}
/// <summary>
/// Search program operations completing the matching process
/// after all pattern elements have been found are created and inserted into the program
/// </summary>
private SearchProgramOperation buildMatchComplete(
SearchProgramOperation insertionPoint)
{
PatternGraph patternGraph = patternGraphWithNestingPatterns.Peek();
string negativeIndependentNamePrefix = NegativeIndependentNamePrefix(patternGraph);
// is subpattern gives information about type of top level enclosing pattern (action vs. subpattern)
// contains subpatterns gives informations about current pattern graph (might be negative, independent itself, too)
bool isSubpattern = programType == SearchProgramType.Subpattern
|| programType == SearchProgramType.AlternativeCase
|| programType == SearchProgramType.Iterated;
bool existsNonInlinedSubpattern = false;
foreach(PatternGraphEmbedding sub in patternGraph.embeddedGraphsPlusInlined)
if(!sub.inlined)
existsNonInlinedSubpattern = true;
bool containsSubpatterns = existsNonInlinedSubpattern
|| patternGraph.alternativesPlusInlined.Length >= 1
|| patternGraph.iteratedsPlusInlined.Length >= 1;
// increase iterated matched counter if it is iterated
if(programType==SearchProgramType.Iterated) {
AcceptIterated acceptIterated = new AcceptIterated();
insertionPoint = insertionPoint.Append(acceptIterated);
}
// push subpattern tasks (in case there are some)
if(containsSubpatterns)
insertionPoint = insertPushSubpatternTasks(insertionPoint);
// if this is a subpattern without subpatterns
// it may be the last to be matched - handle that case
if(!containsSubpatterns && isSubpattern && programType!=SearchProgramType.Iterated && negativeIndependentNamePrefix=="")
insertionPoint = insertCheckForTasksLeft(insertionPoint);
// if this is a subpattern or a top-level pattern which contains subpatterns
if(containsSubpatterns || isSubpattern && negativeIndependentNamePrefix=="")
{
// we do the global accept of all candidate elements (write isomorphy information)
insertionPoint = insertGlobalAccept(insertionPoint);
// and execute the open subpattern matching tasks
MatchSubpatterns matchSubpatterns = new MatchSubpatterns(negativeIndependentNamePrefix, parallelized);
insertionPoint = insertionPoint.Append(matchSubpatterns);
}
// pop subpattern tasks (in case there are/were some)
if(containsSubpatterns)
insertionPoint = insertPopSubpatternTasks(insertionPoint);
// handle matched or not matched subpatterns, matched local pattern
if(negativeIndependentNamePrefix == "")
{
// subpattern or top-level pattern which contains subpatterns
if(containsSubpatterns || isSubpattern)
insertionPoint = insertCheckForSubpatternsFound(insertionPoint, false);
else // top-level-pattern of action without subpatterns
insertionPoint = insertPatternFound(insertionPoint);
}
else
{
// negative/independent contains subpatterns
if(containsSubpatterns)
insertionPoint = insertCheckForSubpatternsFoundNegativeIndependent(insertionPoint);
else
insertionPoint = insertPatternFoundNegativeIndependent(insertionPoint);
}
// global abandon of all accepted candidate elements (remove isomorphy information)
if(containsSubpatterns || isSubpattern && negativeIndependentNamePrefix=="")
insertionPoint = insertGlobalAbandon(insertionPoint);
// decrease iterated matched counter again if it is iterated
if(programType == SearchProgramType.Iterated)
{
AbandonIterated abandonIterated = new AbandonIterated();
insertionPoint = insertionPoint.Append(abandonIterated);
}
return insertionPoint;
}