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/*
* SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.store.reasoning.translator.metamodel;
import tools.refinery.store.reasoning.representation.PartialRelation;
import tools.refinery.store.reasoning.translator.TranslationException;
import tools.refinery.store.reasoning.translator.containment.ContainmentHierarchyTranslator;
import tools.refinery.store.reasoning.translator.containment.ContainmentInfo;
import tools.refinery.store.reasoning.translator.crossreference.DirectedCrossReferenceInfo;
import tools.refinery.store.reasoning.translator.crossreference.UndirectedCrossReferenceInfo;
import tools.refinery.store.reasoning.translator.multiplicity.Multiplicity;
import tools.refinery.store.reasoning.translator.multiplicity.UnconstrainedMultiplicity;
import tools.refinery.store.reasoning.translator.typehierarchy.TypeInfo;
import java.util.*;
import java.util.function.Consumer;
public class MetamodelBuilder {
private final ContainedTypeHierarchyBuilder typeHierarchyBuilder = new ContainedTypeHierarchyBuilder();
private final Map<PartialRelation, ReferenceInfo> referenceInfoMap = new LinkedHashMap<>();
private final Set<PartialRelation> containedTypes = new HashSet<>();
private final Map<PartialRelation, ContainmentInfo> containmentHierarchy = new LinkedHashMap<>();
private final Map<PartialRelation, DirectedCrossReferenceInfo> directedCrossReferences = new LinkedHashMap<>();
private final Map<PartialRelation, UndirectedCrossReferenceInfo> undirectedCrossReferences = new LinkedHashMap<>();
private final Map<PartialRelation, PartialRelation> oppositeReferences = new LinkedHashMap<>();
MetamodelBuilder() {
typeHierarchyBuilder.type(ContainmentHierarchyTranslator.CONTAINED_SYMBOL, true);
}
public MetamodelBuilder type(PartialRelation partialRelation, TypeInfo typeInfo) {
typeHierarchyBuilder.type(partialRelation, typeInfo);
return this;
}
public MetamodelBuilder type(PartialRelation partialRelation, boolean abstractType,
PartialRelation... supertypes) {
typeHierarchyBuilder.type(partialRelation, abstractType, supertypes);
return this;
}
public MetamodelBuilder type(PartialRelation partialRelation, boolean abstractType,
Collection<PartialRelation> supertypes) {
typeHierarchyBuilder.type(partialRelation, abstractType, supertypes);
return this;
}
public MetamodelBuilder type(PartialRelation partialRelation, PartialRelation... supertypes) {
typeHierarchyBuilder.type(partialRelation, supertypes);
return this;
}
public MetamodelBuilder type(PartialRelation partialRelation, Collection<PartialRelation> supertypes) {
typeHierarchyBuilder.type(partialRelation, supertypes);
return this;
}
public MetamodelBuilder types(Collection<Map.Entry<PartialRelation, TypeInfo>> entries) {
typeHierarchyBuilder.types(entries);
return this;
}
public MetamodelBuilder types(Map<PartialRelation, TypeInfo> map) {
typeHierarchyBuilder.types(map);
return this;
}
public MetamodelBuilder reference(PartialRelation linkType, Consumer<ReferenceInfoBuilder> callback) {
var builder = ReferenceInfo.builder();
callback.accept(builder);
return reference(linkType, builder.build());
}
public MetamodelBuilder reference(PartialRelation linkType, ReferenceInfo info) {
if (linkType.arity() != 2) {
throw new TranslationException(linkType,
"Only references of arity 2 are supported, got %s with %d instead".formatted(
linkType, linkType.arity()));
}
var putResult = referenceInfoMap.put(linkType, info);
if (putResult != null && !putResult.equals(info)) {
throw new TranslationException(linkType, "Duplicate reference info for partial relation: " + linkType);
}
return this;
}
public MetamodelBuilder references(Collection<Map.Entry<PartialRelation, ReferenceInfo>> entries) {
for (var entry : entries) {
reference(entry.getKey(), entry.getValue());
}
return this;
}
public MetamodelBuilder references(Map<PartialRelation, ReferenceInfo> map) {
return references(map.entrySet());
}
public Metamodel build() {
for (var entry : referenceInfoMap.entrySet()) {
var linkType = entry.getKey();
var info = entry.getValue();
processReferenceInfo(linkType, info);
}
typeHierarchyBuilder.setContainedTypes(containedTypes);
var typeHierarchy = typeHierarchyBuilder.build();
return new Metamodel(typeHierarchy, Collections.unmodifiableMap(containmentHierarchy),
Collections.unmodifiableMap(directedCrossReferences),
Collections.unmodifiableMap(undirectedCrossReferences),
Collections.unmodifiableMap(oppositeReferences));
}
private void processReferenceInfo(PartialRelation linkType, ReferenceInfo info) {
if (oppositeReferences.containsKey(linkType) || containmentHierarchy.containsKey(linkType)) {
// We already processed this reference while processing its opposite.
return;
}
var sourceType = info.sourceType();
if (typeHierarchyBuilder.isInvalidType(sourceType)) {
throw new TranslationException(linkType, "Source type %s of %s is not in type hierarchy"
.formatted(sourceType, linkType));
}
var targetType = info.targetType();
var opposite = info.opposite();
Multiplicity targetMultiplicity = UnconstrainedMultiplicity.INSTANCE;
var defaultValue = info.defaultValue();
if (opposite != null) {
var oppositeInfo = referenceInfoMap.get(opposite);
validateOpposite(linkType, info, opposite, oppositeInfo);
targetMultiplicity = oppositeInfo.multiplicity();
defaultValue = defaultValue.meet(oppositeInfo.defaultValue());
if (oppositeInfo.containment()) {
// Skip processing this reference and process it once we encounter its containment opposite.
return;
}
if (opposite.equals(linkType)) {
if (!sourceType.equals(targetType)) {
throw new TranslationException(linkType,
"Target %s of undirected reference %s differs from source %s".formatted(
targetType, linkType, sourceType));
}
undirectedCrossReferences.put(linkType, new UndirectedCrossReferenceInfo(sourceType,
info.multiplicity(), defaultValue));
return;
}
oppositeReferences.put(opposite, linkType);
}
if (info.containment()) {
processContainmentInfo(linkType, info, targetMultiplicity);
return;
}
directedCrossReferences.put(linkType, new DirectedCrossReferenceInfo(sourceType, info.multiplicity(),
targetType, targetMultiplicity, defaultValue));
}
private void processContainmentInfo(PartialRelation linkType, ReferenceInfo info,
Multiplicity targetMultiplicity) {
var sourceType = info.sourceType();
var targetType = info.targetType();
var opposite = info.opposite();
if (typeHierarchyBuilder.isInvalidType(targetType)) {
throw new TranslationException(linkType, "Target type %s of %s is not in type hierarchy"
.formatted(targetType, linkType));
}
if (!UnconstrainedMultiplicity.INSTANCE.equals(targetMultiplicity)) {
throw new TranslationException(opposite, "Invalid opposite %s with multiplicity %s of containment %s"
.formatted(opposite, targetMultiplicity, linkType));
}
containedTypes.add(targetType);
containmentHierarchy.put(linkType, new ContainmentInfo(sourceType, info.multiplicity(), targetType));
}
private static void validateOpposite(PartialRelation linkType, ReferenceInfo info, PartialRelation opposite,
ReferenceInfo oppositeInfo) {
var sourceType = info.sourceType();
var targetType = info.targetType();
if (oppositeInfo == null) {
throw new TranslationException(linkType, "Opposite %s of %s is not defined"
.formatted(opposite, linkType));
}
if (!linkType.equals(oppositeInfo.opposite())) {
throw new TranslationException(opposite, "Expected %s to have opposite %s, got %s instead"
.formatted(opposite, linkType, oppositeInfo.opposite()));
}
if (!targetType.equals(oppositeInfo.sourceType())) {
throw new TranslationException(linkType, "Expected %s to have source type %s, got %s instead"
.formatted(opposite, targetType, oppositeInfo.sourceType()));
}
if (!sourceType.equals(oppositeInfo.targetType())) {
throw new TranslationException(linkType, "Expected %s to have target type %s, got %s instead"
.formatted(opposite, sourceType, oppositeInfo.targetType()));
}
if (oppositeInfo.containment() && info.containment()) {
throw new TranslationException(opposite, "Opposite %s of containment %s cannot be containment"
.formatted(opposite, linkType));
}
}
}
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