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/*
* SPDX-FileCopyrightText: 2024 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.language.typesystem;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import org.eclipse.xtext.naming.IQualifiedNameProvider;
import org.eclipse.xtext.util.IResourceScopeCache;
import tools.refinery.language.model.problem.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
@Singleton
public class SignatureProvider {
private static final String PREFIX = "tools.refinery.language.typesystem.SignatureProvider.";
private static final String SIGNATURE_CACHE = PREFIX + "SIGNATURE_CACHE";
private static final String DATATYPE_CACHE = PREFIX + "DATATYPE_CACHE";
private static final String AGGREGATOR_CACHE = PREFIX + "AGGREGATOR_CACHE";
@Inject
private IQualifiedNameProvider qualifiedNameProvider;
@Inject
private IResourceScopeCache cache;
public Signature getSignature(Relation relation) {
var signatures = cache.get(SIGNATURE_CACHE, relation.eResource(), () -> new HashMap<Relation, Signature>());
return signatures.computeIfAbsent(relation, this::computeSignature);
}
public int getArity(Relation relation) {
return getSignature(relation).parameterTypes().size();
}
private Signature computeSignature(Relation relation) {
return new Signature(getParameterTypes(relation), getResultType(relation));
}
private List<FixedType> getParameterTypes(Relation relation) {
return switch (relation) {
case ClassDeclaration ignored -> List.of(ExprType.NODE);
case EnumDeclaration ignored -> List.of(ExprType.NODE);
case DatatypeDeclaration datatypeDeclaration -> List.of(getDataType(datatypeDeclaration));
case ReferenceDeclaration referenceDeclaration -> {
if (referenceDeclaration.getReferenceType() instanceof DatatypeDeclaration) {
yield List.of(ExprType.NODE);
}
yield List.of(ExprType.NODE, ExprType.NODE);
}
case ParametricDefinition parametricDefinition -> {
var parameters = parametricDefinition.getParameters();
var exprTypes = new ArrayList<FixedType>(parameters.size());
for (var parameter : parameters) {
if (parameter.getParameterType() instanceof DatatypeDeclaration datatypeDeclaration) {
exprTypes.add(getDataType(datatypeDeclaration));
} else {
exprTypes.add(ExprType.NODE);
}
}
yield List.copyOf(exprTypes);
}
default -> throw new IllegalArgumentException("Unknown Relation: " + relation);
};
}
private FixedType getResultType(Relation relation) {
if (relation instanceof ReferenceDeclaration referenceDeclaration &&
referenceDeclaration.getReferenceType() instanceof DatatypeDeclaration datatypeDeclaration) {
return getDataType(datatypeDeclaration);
}
return ExprType.LITERAL;
}
public DataExprType getDataType(DatatypeDeclaration datatypeDeclaration) {
var dataTypes = cache.get(DATATYPE_CACHE, datatypeDeclaration.eResource(),
() -> new HashMap<DatatypeDeclaration, DataExprType>());
return dataTypes.computeIfAbsent(datatypeDeclaration, this::computeDataType);
}
private DataExprType computeDataType(DatatypeDeclaration datatypeDeclaration) {
var qualifiedName = qualifiedNameProvider.getFullyQualifiedName(datatypeDeclaration);
if (qualifiedName == null) {
throw new IllegalArgumentException("Datatype declaration has no qualified name: " + datatypeDeclaration);
}
return new DataExprType(qualifiedName);
}
public AggregatorName getAggregatorName(AggregatorDeclaration aggregatorDeclaration) {
var dataTypes = cache.get(AGGREGATOR_CACHE, aggregatorDeclaration.eResource(),
() -> new HashMap<AggregatorDeclaration, AggregatorName>());
return dataTypes.computeIfAbsent(aggregatorDeclaration, this::computeAggregatorName);
}
private AggregatorName computeAggregatorName(AggregatorDeclaration aggregatorDeclaration) {
var qualifiedName = qualifiedNameProvider.getFullyQualifiedName(aggregatorDeclaration);
if (qualifiedName == null) {
throw new IllegalArgumentException(
"Aggregator declaration has no qualified name: " + aggregatorDeclaration);
}
return new AggregatorName(qualifiedName);
}
}
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