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/*
* SPDX-FileCopyrightText: 2021-2023 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.language.utils;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.util.EcoreUtil;
import tools.refinery.language.model.problem.*;
public final class ProblemUtil {
public static final String BUILTIN_LIBRARY_NAME = "builtin";
public static final URI BUILTIN_LIBRARY_URI = getLibraryUri();
private ProblemUtil() {
throw new IllegalStateException("This is a static utility class and should not be instantiated directly");
}
public static boolean isBuiltIn(EObject eObject) {
if (eObject != null) {
var eResource = eObject.eResource();
if (eResource != null) {
return ProblemUtil.BUILTIN_LIBRARY_URI.equals(eResource.getURI());
}
}
return false;
}
public static boolean isSingletonVariable(Variable variable) {
return variable.eContainingFeature() == ProblemPackage.Literals.VARIABLE_OR_NODE_EXPR__SINGLETON_VARIABLE;
}
public static boolean isImplicitVariable(Variable variable) {
return variable instanceof ImplicitVariable;
}
public static boolean isImplicitNode(Node node) {
return node.eContainingFeature() == ProblemPackage.Literals.PROBLEM__NODES;
}
public static boolean isImplicit(EObject eObject) {
if (eObject instanceof Node node) {
return isImplicitNode(node);
} else if (eObject instanceof Variable variable) {
return isImplicitVariable(variable);
} else {
return false;
}
}
public static boolean isError(EObject eObject) {
return eObject instanceof PredicateDefinition predicateDefinition && predicateDefinition.isError();
}
public static boolean isIndividualNode(Node node) {
var containingFeature = node.eContainingFeature();
return containingFeature == ProblemPackage.Literals.INDIVIDUAL_DECLARATION__NODES
|| containingFeature == ProblemPackage.Literals.ENUM_DECLARATION__LITERALS;
}
public static boolean isNewNode(Node node) {
return node.eContainingFeature() == ProblemPackage.Literals.CLASS_DECLARATION__NEW_NODE;
}
public static boolean isInvalidMultiplicityConstraint(PredicateDefinition predicateDefinition) {
return predicateDefinition.eContainingFeature() ==
ProblemPackage.Literals.REFERENCE_DECLARATION__INVALID_MULTIPLICITY;
}
public static boolean hasMultiplicityConstraint(ReferenceDeclaration referenceDeclaration) {
var opposite = referenceDeclaration.getOpposite();
if (opposite != null && opposite.getKind() == ReferenceKind.CONTAINMENT) {
return false;
}
var multiplicity = referenceDeclaration.getMultiplicity();
if (multiplicity instanceof UnboundedMultiplicity) {
return false;
}
if (multiplicity instanceof RangeMultiplicity rangeMultiplicity) {
return rangeMultiplicity.getLowerBound() > 0 || rangeMultiplicity.getUpperBound() >= 0;
}
return true;
}
public static int getArity(Relation relation) {
if (relation instanceof ClassDeclaration || relation instanceof EnumDeclaration) {
return 1;
}
if (relation instanceof ReferenceDeclaration) {
return 2;
}
if (relation instanceof PredicateDefinition predicateDefinition) {
return predicateDefinition.getParameters().size();
}
throw new IllegalArgumentException("Unknown Relation: " + relation);
}
public static boolean isContainerReference(ReferenceDeclaration referenceDeclaration) {
var kind = referenceDeclaration.getKind();
if (kind == null) {
return false;
}
return switch (kind) {
case CONTAINMENT -> false;
case CONTAINER -> true;
case REFERENCE -> {
var opposite = referenceDeclaration.getOpposite();
if (opposite == null) {
yield false;
}
opposite = (ReferenceDeclaration) EcoreUtil.resolve(opposite, referenceDeclaration);
yield opposite.getKind() == ReferenceKind.CONTAINMENT;
}
};
}
private static URI getLibraryUri() {
var libraryResource = ProblemUtil.class.getClassLoader()
.getResource("tools/refinery/language/%s.problem".formatted(BUILTIN_LIBRARY_NAME));
if (libraryResource == null) {
throw new AssertionError("Library '%s' was not found".formatted(BUILTIN_LIBRARY_NAME));
}
return URI.createURI(libraryResource.toString());
}
}
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