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package hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.dse
import hu.bme.mit.inf.dslreasoner.viatra2logic.NumericDrealProblemSolver
import hu.bme.mit.inf.dslreasoner.viatra2logic.NumericTranslator
import hu.bme.mit.inf.dslreasoner.viatra2logic.NumericZ3ProblemSolver
import hu.bme.mit.inf.dslreasoner.viatrasolver.partialinterpretationlanguage.partialinterpretation.BooleanElement
import hu.bme.mit.inf.dslreasoner.viatrasolver.partialinterpretationlanguage.partialinterpretation.IntegerElement
import hu.bme.mit.inf.dslreasoner.viatrasolver.partialinterpretationlanguage.partialinterpretation.PartialInterpretation
import hu.bme.mit.inf.dslreasoner.viatrasolver.partialinterpretationlanguage.partialinterpretation.PrimitiveElement
import hu.bme.mit.inf.dslreasoner.viatrasolver.partialinterpretationlanguage.partialinterpretation.RealElement
import hu.bme.mit.inf.dslreasoner.viatrasolver.partialinterpretationlanguage.partialinterpretation.StringElement
import hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.ModelGenerationMethod
import hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.NumericSolverSelection
import hu.bme.mit.inf.dslreasoner.viatrasolver.reasoner.ViatraReasonerConfiguration
import java.math.BigDecimal
import java.util.HashMap
import java.util.LinkedHashMap
import java.util.LinkedHashSet
import java.util.List
import java.util.Map
import org.eclipse.emf.ecore.EObject
import org.eclipse.viatra.dse.base.ThreadContext
import org.eclipse.viatra.query.runtime.api.IPatternMatch
import org.eclipse.viatra.query.runtime.api.ViatraQueryMatcher
import org.eclipse.viatra.query.runtime.matchers.psystem.PConstraint
class NumericSolver {
val ModelGenerationMethod method
var ThreadContext threadContext
val constraint2MustUnitPropagationPrecondition = new HashMap<PConstraint,ViatraQueryMatcher<? extends IPatternMatch>>
val constraint2CurrentUnitPropagationPrecondition = new HashMap<PConstraint,ViatraQueryMatcher<? extends IPatternMatch>>
NumericTranslator t
val boolean intermediateConsistencyCheck
val boolean caching;
Map<LinkedHashMap<PConstraint, Iterable<List<Integer>>>,Boolean> satisfiabilityCache = new HashMap
val String drealLocalPath;
var long runtime = 0
var long cachingTime = 0
var int numberOfSolverCalls = 0
var int numberOfCachedSolverCalls = 0
new(ModelGenerationMethod method, ViatraReasonerConfiguration config, boolean caching) {
this.method = method
this.intermediateConsistencyCheck = config.runIntermediateNumericalConsistencyChecks
this.caching = caching
this.drealLocalPath = config.drealLocalPath
this.t = new NumericTranslator(createNumericTranslator(config.numericSolverSelection))
}
def createNumericTranslator(NumericSolverSelection solverSelection) {
if (solverSelection == NumericSolverSelection.DREAL_DOCKER)
return new NumericDrealProblemSolver(true, null)
if (solverSelection == NumericSolverSelection.DREAL_LOCAL)
return new NumericDrealProblemSolver(false, drealLocalPath)
if (solverSelection == NumericSolverSelection.Z3) return new NumericZ3ProblemSolver
}
def init(ThreadContext context) {
// This makes the NumericSolver single-threaded,
// but that's not a problem, because we only use the solver on a single thread anyways.
this.threadContext = context
val engine = threadContext.queryEngine
for(entry : method.mustUnitPropagationPreconditions.entrySet) {
val constraint = entry.key
val querySpec = entry.value
val matcher = querySpec.getMatcher(engine);
constraint2MustUnitPropagationPrecondition.put(constraint,matcher)
}
for(entry : method.currentUnitPropagationPreconditions.entrySet) {
val constraint = entry.key
val querySpec = entry.value
val matcher = querySpec.getMatcher(engine);
constraint2CurrentUnitPropagationPrecondition.put(constraint,matcher)
}
}
def getRuntime(){runtime}
def getCachingTime(){cachingTime}
def getNumberOfSolverCalls(){numberOfSolverCalls}
def getNumberOfCachedSolverCalls(){numberOfCachedSolverCalls}
def getSolverFormingProblem(){this.t.formingProblemTime}
def getSolverSolvingProblem(){this.t.solvingProblemTime}
def getSolverSolution(){this.t.formingSolutionTime}
def getNumericSolverSelection(){this.t.numericSolver}
def boolean maySatisfiable() {
if(intermediateConsistencyCheck) {
return isSatisfiable(this.constraint2MustUnitPropagationPrecondition)
} else {
return true
}
}
def boolean currentSatisfiable() {
isSatisfiable(this.constraint2CurrentUnitPropagationPrecondition)
}
private def boolean isSatisfiable(Map<PConstraint,ViatraQueryMatcher<? extends IPatternMatch>> matches) {
val start = System.nanoTime
var boolean finalResult
if(matches.empty){
finalResult=true
} else {
val propagatedConstraints = new HashMap
println("<<<<START-STEP>>>>")
for(entry : matches.entrySet) {
val constraint = entry.key
// println("--match?-- " + constraint)
val allMatches = entry.value.allMatches.map[it.toArray]
// println("---------- " + entry.value.allMatches)
propagatedConstraints.put(constraint,allMatches)
}
if(propagatedConstraints.values.forall[empty]) {
finalResult=true
} else {
if(caching) {
val code = getCode(propagatedConstraints)
val cachedResult = satisfiabilityCache.get(code)
if(cachedResult === null) {
// println('''new problem, call solver''')
// for(entry : code.entrySet) {
// println('''«entry.key» -> «entry.value»''')
// }
//println(code.hashCode)
this.numberOfSolverCalls++
val res = t.delegateIsSatisfiable(propagatedConstraints)
satisfiabilityCache.put(code,res)
finalResult=res
} else {
//println('''similar problem, answer from cache''')
finalResult=cachedResult
this.numberOfCachedSolverCalls++
}
} else {
finalResult= t.delegateIsSatisfiable(propagatedConstraints)
this.numberOfSolverCalls++
}
}
}
this.runtime+=System.nanoTime-start
return finalResult
}
def getCode(HashMap<PConstraint, Iterable<Object[]>> propagatedConstraints) {
val start = System.nanoTime
val involvedObjects = new LinkedHashSet(propagatedConstraints.values.flatten.map[toList].flatten.toList).toList
val res = new LinkedHashMap(propagatedConstraints.mapValues[matches | matches.map[objects | objects.map[object | involvedObjects.indexOf(object)].toList]])
this.cachingTime += System.nanoTime-start
return res
}
def fillSolutionCopy(Map<EObject, EObject> trace) {
val model = threadContext.getModel as PartialInterpretation
val dataObjects = model.newElements.filter(PrimitiveElement).filter[!model.openWorldElements.contains(it)].toList
if(constraint2CurrentUnitPropagationPrecondition.empty) {
fillWithDefaultValues(dataObjects,trace)
} else {
val propagatedConstraints = new HashMap
for(entry : constraint2CurrentUnitPropagationPrecondition.entrySet) {
val constraint = entry.key
val allMatches = entry.value.allMatches.map[it.toArray]
propagatedConstraints.put(constraint,allMatches)
}
if(propagatedConstraints.values.forall[empty]) {
fillWithDefaultValues(dataObjects,trace)
} else {
val solution = t.delegateGetSolution(dataObjects,propagatedConstraints)
fillWithSolutions(dataObjects,solution,trace)
}
}
}
def protected fillWithDefaultValues(List<PrimitiveElement> elements, Map<EObject, EObject> trace) {
for(element : elements) {
if(element.valueSet==false) {
val value = getDefaultValue(element)
val target = trace.get(element) as PrimitiveElement
target.fillWithValue(value)
}
}
}
def protected dispatch getDefaultValue(BooleanElement e) {false}
def protected dispatch getDefaultValue(IntegerElement e) {0}
def protected dispatch getDefaultValue(RealElement e) {0.0}
def protected dispatch getDefaultValue(StringElement e) {""}
def protected fillWithSolutions(List<PrimitiveElement> elements, Map<PrimitiveElement, Number> solution, Map<EObject, EObject> trace) {
for(element : elements) {
if(element.valueSet==false) {
if(solution.containsKey(element)) {
val value = solution.get(element)
val target = trace.get(element) as PrimitiveElement
target.fillWithValue(value)
} else {
val target = trace.get(element) as PrimitiveElement
target.fillWithValue(target.defaultValue)
}
}
}
}
def protected dispatch fillWithValue(BooleanElement e, Object value) {e.valueSet=true e.value=value as Boolean}
def protected dispatch fillWithValue(IntegerElement e, Object value) {e.valueSet=true e.value=value as Integer}
def protected dispatch fillWithValue(RealElement e, Object value) {e.valueSet=true e.value=value as Double }
def protected dispatch fillWithValue(StringElement e, Object value) {e.valueSet=true e.value=value as String}
}
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