Refine MatchHistory impl, extract interface for tests, add several tests.
This commit is contained in:
Grigorii Kirgizov
parent
9a7838fdc7
commit
612f0a212c
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@ -20,73 +20,136 @@ import gnu.trove.set.TIntSet
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import gnu.trove.set.hash.TIntHashSet
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import jetbrains.mps.logic.reactor.core.Occurrence
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import jetbrains.mps.logic.reactor.evaluation.RuleMatch
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import org.jetbrains.kotlin.utils.mapToIndex
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import jetbrains.mps.logic.reactor.evaluation.StoreView
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import java.util.*
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internal class MatchHistory() {
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class Chunk(val match: RuleMatch, val id: Int, headJustifications: TIntSet) {
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interface MatchHistory {
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data class Chunk(val match: RuleMatch, val id: Int, val justifications: TIntSet) {
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data class Entry(val occ: Occurrence, val isDiscarded: Boolean = false)
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var occurrences: MutableList<Entry> = mutableListOf()
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val justifications = headJustifications.also { it.add(id) }
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}
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class RemoveChunkIterator(val it: MutableListIterator<Chunk>): Iterator<Chunk> by it {
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fun remove() = it.remove()
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}
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fun removeIterator() = RemoveChunkIterator(hist.listIterator())
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interface HistoryPos {
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fun chunk(): Chunk
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fun occsRetained(): Int
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}
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fun logMatch(match: RuleMatchImpl) {
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fun removeIterator(): RemoveChunkIterator
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fun resetStore()
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fun storeView(): StoreView
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fun logMatch(match: RuleMatch)
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fun logOccurence(occ: Occurrence)
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fun current(): Chunk
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fun currentPos(): HistoryPos
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fun push()
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fun reset(timepoint: HistoryPos)
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fun rollTo(futurePos: HistoryPos)
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companion object {
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fun getMatchHistory(chunkIdSeed: Int = 0): MatchHistory = MatchHistoryImpl(chunkIdSeed)
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}
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}
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internal class MatchHistoryImpl(chunkIdSeed: Int): MatchHistory {
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override fun removeIterator() = MatchHistory.RemoveChunkIterator(hist.listIterator())
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// Reset only store & history position, don't modify history
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override fun resetStore() {
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frameStack.reset(Frame(frameStack))
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pos = hist.listIterator()
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}
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override fun storeView(): StoreView = frameStack.current.store.view()
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override fun logMatch(match: RuleMatch) {
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val m = match as RuleMatchImpl
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// If the set of justifications isn't empty, then we deal with principal constraint
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val justs = match.headJustifications()
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if (!justs.isEmpty) {
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val newChunk = Chunk(match, nextChunkId++, justs)
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justs.add(nextChunkId)
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val newChunk = MatchHistory.Chunk(match, nextChunkId, justs)
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pos.add(newChunk)
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++nextChunkId
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current = newChunk
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}
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// Log discards
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match.forEachReplaced {occ ->
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// this.dispatchFringe = dispatchFringe.contract(occ)
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current.occurrences.add(Chunk.Entry(occ, true))
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current.occurrences.add(MatchHistory.Chunk.Entry(occ, true))
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frameStack.current.store.discard(occ)
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}
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}
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fun logOccurence(occ: Occurrence) {
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current.occurrences.add(Chunk.Entry(occ))
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override fun logOccurence(occ: Occurrence) {
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current.occurrences.add(MatchHistory.Chunk.Entry(occ))
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frameStack.current.store.store(occ)
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}
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data class HistoryPos(val frame: Frame, val chunk: Chunk, val occsRetained: Int = 0)
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private data class HistoryPosImpl(val frame: Frame, val chunk: MatchHistory.Chunk, val occsRetained: Int = 0) : MatchHistory.HistoryPos {
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override fun chunk(): MatchHistory.Chunk = chunk
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override fun occsRetained(): Int = occsRetained
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}
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// FrameStack API: currentFrame/currentPos, push, reset
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fun currentFrame() = frameStack.current
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override fun current(): MatchHistory.Chunk = current
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override fun currentPos(): MatchHistory.HistoryPos = HistoryPosImpl(frameStack.current, current, current.occurrences.size)
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override fun push(): Unit { frameStack.push() }
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// FrameStack API: currentFrame, push, reset
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fun currentFrame() = HistoryPos(frameStack.current, current, current.occurrences.size)
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fun push() = frameStack.push()
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// Throw away recently added chunks and reset store accordingly
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// NB: not checking that chunks are actually recently added
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fun reset(timepoint: HistoryPos) {
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frameStack.reset(timepoint.frame)
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override fun reset(timepoint: MatchHistory.HistoryPos) {
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val tp = timepoint as HistoryPosImpl
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frameStack.reset(tp.frame)
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while (timepoint.chunk != current && pos.hasPrevious()) {
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pos.remove()
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while (tp.chunk != current && pos.hasPrevious()) {
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current = pos.previous()
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pos.remove()
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}
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current.occurrences = current.occurrences.take(timepoint.occsRetained) as MutableList<Chunk.Entry>
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current.occurrences = current.occurrences.take(tp.occsRetained) as MutableList<MatchHistory.Chunk.Entry>
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}
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fun rollTo(chunk: Chunk) {
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while (chunk != current && pos.hasNext()) {
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override fun rollTo(futurePos: MatchHistory.HistoryPos) {
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val fp = futurePos as HistoryPosImpl
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while (pos.hasNext()) {
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current = pos.next()
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rollChunk()
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if (fp.chunk == current) {
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rollOccurences(current.occurrences.take(fp.occsRetained))
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break
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}
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rollOccurences(current.occurrences)
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}
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}
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private fun rollChunk() {
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fun rollTo(chunk: MatchHistory.Chunk) {
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while (current != chunk && pos.hasNext()) {
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current = pos.next()
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rollOccurences(current.occurrences)
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}
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}
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private fun rollOccurences(occSpecs: Iterable<MatchHistory.Chunk.Entry>) {
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// 'apply' all occurrences of current chunk to the store
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for (occSpec in current.occurrences) {
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for (occSpec in occSpecs) {
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if (occSpec.isDiscarded) {
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frameStack.current.store.discard(occSpec.occ)
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} else {
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@ -95,28 +158,19 @@ internal class MatchHistory() {
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}
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}
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// Reset only store & history position, don't modify history
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fun resetStore() {
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frameStack.reset(Frame(frameStack))
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pos = hist.listIterator()
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}
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// fixme: does belong to here?
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// fun resetOrder() { order = hist.mapToIndex() }
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private val hist: MutableList<Chunk> = mutableListOf()
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private val hist: MutableList<MatchHistory.Chunk> = LinkedList<MatchHistory.Chunk>()
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// private var order: Map<Chunk, Int> = emptyMap()
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private val frameStack: FrameStack = FrameStack(null)
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// FIXME: add framestack to the class
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// is it created along with MatchHistory? should be.
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private val frameStack: FrameStack = FrameStack(null) //FIXME: ?provide storeView at construction
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// FIXME: provide initial chunk? possibly initialized from StoreView, with empty justifications
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private lateinit var current: MatchHistory.Chunk
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private var pos: MutableListIterator<MatchHistory.Chunk> = hist.listIterator()
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private var pos: MutableListIterator<Chunk> = hist.listIterator()
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// FIXME: provide initial chunk at construction
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private lateinit var current: Chunk
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private var nextChunkId: Int = 0;
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private var nextChunkId: Int = chunkIdSeed;
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}
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@ -38,4 +38,5 @@ public interface Constraint extends AndItem {
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*/
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Collection<? extends Predicate> patternPredicates(Collection<?> occurrenceArgs);
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default boolean isPrincipal() { return false; }
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}
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@ -8,10 +8,12 @@ import jetbrains.mps.logic.reactor.program.Predicate
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* @author Fedor Isakov
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*/
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data class MockConstraint(val symbol: ConstraintSymbol, val arguments: List<Any>) : Constraint {
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data class MockConstraint(val symbol: ConstraintSymbol, val arguments: List<Any>, val principal: Boolean = false) : Constraint {
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constructor(symbol: ConstraintSymbol, vararg args: Any) : this(symbol, listOf(* args)) {}
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constructor(symbol: ConstraintSymbol, principal: Boolean, vararg args: Any) : this(symbol, listOf(* args), principal) {}
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override fun arguments(): List<Any> = arguments
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override fun patternPredicates(args: Collection<*>): Collection<Predicate> = emptyList()
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@ -20,6 +22,8 @@ data class MockConstraint(val symbol: ConstraintSymbol, val arguments: List<Any>
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override fun argumentTypes(): List<Class<*>> = arguments.map { arg -> arg.javaClass }
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override fun isPrincipal(): Boolean = principal
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override fun toString(): String = "${symbol()}(${arguments().joinToString()})"
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}
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@ -1,3 +1,5 @@
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import gnu.trove.set.TIntSet
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import gnu.trove.set.hash.TIntHashSet
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import jetbrains.mps.logic.reactor.core.*
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import jetbrains.mps.logic.reactor.core.internal.FeedbackStatus
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import jetbrains.mps.logic.reactor.evaluation.PredicateInvocation
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@ -106,7 +108,11 @@ fun altBody(vararg content: ConjBuilder.() -> Unit): RuleBuilder.() -> Unit = {
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}
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fun constraint(id: String, vararg args: Any): ConjBuilder.() -> Unit = {
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add(createConstraint(args, id))
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add(createConstraint(args, id, false))
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}
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fun princConstraint(id: String, vararg args: Any): ConjBuilder.() -> Unit = {
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add(createConstraint(args, id, true))
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}
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@ -117,6 +123,10 @@ fun equals(left: Any, right: Any): ConjBuilder.() -> Unit = {
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fun occurrence(id: String, vararg args: Any): Occurrence =
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MockConstraint(ConstraintSymbol.symbol(id, args.size)).occurrence(MockController(), listOf(* args))
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fun justifiedOccurrence(id: String, justs: TIntSet, vararg args: Any): Occurrence =
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MockConstraint(ConstraintSymbol.symbol(id, args.size), true).occurrence(listOf(* args), { fooObservable }, justs)
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fun justifiedOccurrence(id: String, justs: Set<Int>, vararg args: Any): Occurrence = justifiedOccurrence(id, TIntHashSet(justs), * args)
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fun sym0(id: String): ConstraintSymbol =
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ConstraintSymbol(id, 0)
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@ -168,8 +178,8 @@ class MockController : Controller {
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class ConjBuilder(val type: Class<out AndItem>) {
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val constraints = ArrayList<AndItem>()
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fun createConstraint(args: Array<out Any>, id: String): Constraint {
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return MockConstraint(ConstraintSymbol(id, args.size), * args)
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fun createConstraint(args: Array<out Any>, id: String, principal: Boolean): Constraint {
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return MockConstraint(ConstraintSymbol(id, args.size), principal, * args)
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}
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fun add(item: AndItem): Unit {
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@ -0,0 +1,303 @@
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import gnu.trove.set.hash.TIntHashSet
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import jetbrains.mps.logic.reactor.core.*
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import jetbrains.mps.logic.reactor.core.internal.createOccurrenceMatcher
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import jetbrains.mps.logic.reactor.core.internal.logical
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import jetbrains.mps.logic.reactor.core.internal.MatchHistory
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import jetbrains.mps.logic.reactor.program.ConstraintSymbol
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import jetbrains.mps.logic.reactor.program.ConstraintSymbol.symbol
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import org.junit.Test
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import org.junit.Assert.*
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/*
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* Copyright 2014-2019 JetBrains s.r.o.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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class TestMatchHistory {
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@Test
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fun testJustificationTracking() {
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val hist = MatchHistory.getMatchHistory()
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with(programWithRules(
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rule("rule1",
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headKept(
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constraint("main")
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),
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body(
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constraint("foo")
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)),
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rule("rule2",
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headKept(
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constraint("foo")
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),
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body(
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constraint("bar")
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)),
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rule("rule3",
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headKept(
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constraint("foo")
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),
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body(
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constraint("qux")
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)),
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rule("rule4",
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headReplaced(
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constraint("bar"),
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constraint("qux")
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),
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body(
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// constraint("blin")
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))))
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{
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var d = Dispatcher(RuleIndex(handlers)).fringe()
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val mainOcc = justifiedOccurrence("main", setOf(0))
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// hist.logOccurence(mainOcc) // plays a role of the initial constraint, with no preceding RuleMatch
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d = d.expand(mainOcc)
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with(d.matches()) {
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count() shouldBe 1
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with(first()) {
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hist.logMatch(this)
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rule().tag() shouldBe "rule1"
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hist.current().justifications shouldBe TIntHashSet(setOf(0))
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val fooOcc = justifiedOccurrence("foo", hist.current().justifications)
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hist.logOccurence(fooOcc)
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d = d.expand(fooOcc)
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}
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}
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with(d.matches()) {
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count() shouldBe 2
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with(elementAt(0)) {
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hist.logMatch(this)
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rule().tag() shouldBe "rule2"
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hist.current().justifications shouldBe TIntHashSet(setOf(0,1))
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val barOcc = justifiedOccurrence("bar", hist.current().justifications)
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hist.logOccurence(barOcc)
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d = d.expand(barOcc)
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with(d.matches()) {
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count() shouldBe 0
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}
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}
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with(elementAt(1)) {
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hist.logMatch(this)
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rule().tag() shouldBe "rule3"
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hist.current().justifications shouldBe TIntHashSet(setOf(0,2))
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val quxOcc = justifiedOccurrence("qux", hist.current().justifications)
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hist.logOccurence(quxOcc)
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d = d.expand(quxOcc)
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with(d.matches()) {
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count() shouldBe 1
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with(first()) {
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hist.logMatch(this)
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rule().tag() shouldBe "rule4"
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}
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hist.current().justifications shouldBe TIntHashSet(setOf(0,1,2,3))
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}
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}
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}
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}
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}
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@Test
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fun testResetThenRoll() {
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val hist = MatchHistory.getMatchHistory()
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with(programWithRules(
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rule("rule1",
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headKept(
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constraint("main")
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),
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body(
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constraint("foo")
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)),
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rule("rule2",
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headKept(
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constraint("foo")
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),
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body(
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constraint("bar")
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)),
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rule("rule3",
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headReplaced(
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constraint("bar"),
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constraint("foo")
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),
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body(
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constraint("qux")
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))
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))
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{
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var d = Dispatcher(RuleIndex(handlers)).fringe()
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val mainOcc = justifiedOccurrence("main", setOf(0))
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// hist.logOccurence(mainOcc) // plays a role of the initial constraint, with no preceding RuleMatch
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d = d.expand(mainOcc)
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with(d.matches().first()) {
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hist.logMatch(this)
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}
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val fooOcc = justifiedOccurrence("foo", hist.current().justifications)
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hist.logOccurence(fooOcc)
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d = d.expand(fooOcc)
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with(d.matches().first()) {
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hist.logMatch(this)
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}
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val barOcc = justifiedOccurrence("bar", hist.current().justifications)
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hist.logOccurence(barOcc)
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d = d.expand(barOcc)
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with(d.matches().first()) {
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hist.logMatch(this)
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}
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val quxOcc = justifiedOccurrence("qux", hist.current().justifications)
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hist.logOccurence(quxOcc)
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d = d.expand(quxOcc)
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// 'rollTo' to the saved pos after full 'resetStore' must restore the store
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val oldStore = hist.storeView().allOccurrences()
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oldStore.count() shouldBe 1
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val savedPos = hist.currentPos()
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hist.resetStore()
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hist.storeView().allOccurrences().count() shouldBe 0
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hist.rollTo(savedPos)
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hist.storeView().allOccurrences() shouldBe oldStore
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hist.currentPos().chunk() shouldBe savedPos.chunk()
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hist.currentPos().occsRetained() shouldBe savedPos.occsRetained()
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}
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}
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@Test
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fun testPushExecReset() {
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val hist = MatchHistory.getMatchHistory()
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with(programWithRules(
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rule("rule1",
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headKept(
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princConstraint("main")
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),
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body(
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princConstraint("foo")
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)),
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rule("rule2",
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headKept(
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princConstraint("foo")
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),
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body(
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constraint("bar"),
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constraint("bazz"),
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princConstraint("qux")
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)),
|
||||
rule("rule3",
|
||||
headReplaced(
|
||||
constraint("bar"),
|
||||
constraint("bazz")
|
||||
),
|
||||
body(
|
||||
constraint("bazz")
|
||||
)),
|
||||
rule("rule4",
|
||||
headKept(
|
||||
princConstraint("qux"),
|
||||
princConstraint("foo")
|
||||
),
|
||||
body(
|
||||
constraint("last")
|
||||
))
|
||||
))
|
||||
{
|
||||
|
||||
var d = Dispatcher(RuleIndex(handlers)).fringe()
|
||||
val mainOcc = justifiedOccurrence("main", setOf(0))
|
||||
d = d.expand(mainOcc)
|
||||
|
||||
with(d.matches().first()) {
|
||||
rule().tag() shouldBe "rule1"
|
||||
hist.logMatch(this)
|
||||
}
|
||||
val fooOcc = justifiedOccurrence("foo", hist.current().justifications)
|
||||
hist.logOccurence(fooOcc)
|
||||
d = d.expand(fooOcc)
|
||||
|
||||
|
||||
with(d.matches().first()) {
|
||||
rule().tag() shouldBe "rule2"
|
||||
hist.logMatch(this)
|
||||
}
|
||||
val barOcc = occurrence("bar")
|
||||
val bazzOcc = occurrence("bazz")
|
||||
val quxOcc = justifiedOccurrence("qux", hist.current().justifications)
|
||||
hist.logOccurence(barOcc)
|
||||
d = d.expand(barOcc)
|
||||
hist.logOccurence(bazzOcc)
|
||||
d = d.expand(bazzOcc)
|
||||
|
||||
|
||||
val curChunk = hist.current()
|
||||
with(d.matches().first()) {
|
||||
rule().tag() shouldBe "rule3"
|
||||
hist.logMatch(this)
|
||||
}
|
||||
// matched on rule with heads without justifications, should remain in the same chunk
|
||||
hist.current() shouldBeSame curChunk
|
||||
|
||||
val bazzOcc2 = occurrence("bazz")
|
||||
hist.logOccurence(bazzOcc2)
|
||||
d = d.expand(bazzOcc2)
|
||||
|
||||
val oldStore = hist.storeView().allOccurrences()
|
||||
val savedPos = hist.currentPos()
|
||||
hist.push()
|
||||
|
||||
|
||||
hist.logOccurence(quxOcc)
|
||||
d = d.expand(quxOcc)
|
||||
|
||||
|
||||
with(d.matches().first()) {
|
||||
rule().tag() shouldBe "rule4"
|
||||
hist.logMatch(this)
|
||||
}
|
||||
val lastOcc = occurrence("last")
|
||||
hist.logOccurence(lastOcc)
|
||||
d = d.expand(lastOcc)
|
||||
|
||||
|
||||
assertNotEquals(oldStore, hist.storeView().allOccurrences())
|
||||
hist.reset(savedPos)
|
||||
assertEquals(oldStore, hist.storeView().allOccurrences())
|
||||
|
||||
hist.currentPos().chunk() shouldBe savedPos.chunk()
|
||||
hist.currentPos().occsRetained() shouldBe savedPos.occsRetained()
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue