io.micronaut.ast.groovy.visitor.GroovyWildcardElement Maven / Gradle / Ivy
/*
* Copyright 2017-2021 original authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.micronaut.ast.groovy.visitor;
import io.micronaut.core.annotation.AnnotationMetadata;
import io.micronaut.core.annotation.Internal;
import io.micronaut.core.annotation.NonNull;
import io.micronaut.core.annotation.Nullable;
import io.micronaut.inject.annotation.AnnotationMetadataHierarchy;
import io.micronaut.inject.ast.ArrayableClassElement;
import io.micronaut.inject.ast.ClassElement;
import io.micronaut.inject.ast.WildcardElement;
import io.micronaut.inject.ast.annotation.ElementAnnotationMetadata;
import io.micronaut.inject.ast.annotation.ElementAnnotationMetadataFactory;
import io.micronaut.inject.ast.annotation.MutableAnnotationMetadataDelegate;
import io.micronaut.inject.ast.annotation.WildcardElementAnnotationMetadata;
import java.util.Collection;
import java.util.List;
import java.util.Optional;
import java.util.function.Function;
import java.util.stream.Collectors;
/**
* Implementation of {@link io.micronaut.inject.ast.WildcardElement} for Java.
*
* @author Jonas Konrad
* @since 3.1.0
*/
@Internal
final class GroovyWildcardElement extends GroovyClassElement implements WildcardElement {
private final GroovyNativeElement wildcardNativeElement;
private final GroovyClassElement upperType;
private final List upperBounds;
private final List lowerBounds;
private final ElementAnnotationMetadata typeAnnotationMetadata;
@Nullable
private ElementAnnotationMetadata genericTypeAnnotationMetadata;
GroovyWildcardElement(@NonNull GroovyNativeElement wildcardNativeElement,
@NonNull List upperBounds,
@NonNull List lowerBounds,
@NonNull ElementAnnotationMetadataFactory annotationMetadataFactory,
@NonNull GroovyClassElement upperType) {
super(
upperType.visitorContext,
upperType.getNativeType(),
annotationMetadataFactory,
upperType.getTypeArguments(),
0
);
this.wildcardNativeElement = wildcardNativeElement;
this.upperType = upperType;
this.upperBounds = upperBounds;
this.lowerBounds = lowerBounds;
typeAnnotationMetadata = new WildcardElementAnnotationMetadata(this, upperType);
}
@Override
public Optional getResolved() {
return Optional.of(upperType);
}
@NonNull
@Override
public MutableAnnotationMetadataDelegate getGenericTypeAnnotationMetadata() {
if (genericTypeAnnotationMetadata == null) {
genericTypeAnnotationMetadata = elementAnnotationMetadataFactory.buildGenericTypeAnnotations(this);
}
return genericTypeAnnotationMetadata;
}
@Override
protected MutableAnnotationMetadataDelegate getAnnotationMetadataToWrite() {
return getGenericTypeAnnotationMetadata();
}
@NonNull
@Override
public MutableAnnotationMetadataDelegate getTypeAnnotationMetadata() {
return typeAnnotationMetadata;
}
@NonNull
@Override
public AnnotationMetadata getAnnotationMetadata() {
return new AnnotationMetadataHierarchy(true, super.getAnnotationMetadata(), getGenericTypeAnnotationMetadata());
}
@NonNull
@Override
public Object getGenericNativeType() {
return wildcardNativeElement;
}
@NonNull
@Override
protected GroovyClassElement copyConstructor() {
return new GroovyWildcardElement(wildcardNativeElement, upperBounds, lowerBounds, elementAnnotationMetadataFactory, upperType);
}
@NonNull
@Override
public List getUpperBounds() {
return upperBounds;
}
@NonNull
@Override
public List getLowerBounds() {
return lowerBounds;
}
@Override
public ClassElement withArrayDimensions(int arrayDimensions) {
if (arrayDimensions != 0) {
throw new UnsupportedOperationException("Can't create array of wildcard");
}
return this;
}
@Override
public ClassElement foldBoundGenericTypes(@NonNull Function fold) {
List upperBounds = this.upperBounds.stream().map(ele -> toGroovyClassElement(ele.foldBoundGenericTypes(fold))).collect(Collectors.toList());
List lowerBounds = this.lowerBounds.stream().map(ele -> toGroovyClassElement(ele.foldBoundGenericTypes(fold))).collect(Collectors.toList());
return fold.apply(upperBounds.contains(null) || lowerBounds.contains(null) ? null : new GroovyWildcardElement(wildcardNativeElement, upperBounds, lowerBounds, elementAnnotationMetadataFactory, upperType));
}
private GroovyClassElement toGroovyClassElement(ClassElement element) {
if (element == null || element instanceof GroovyClassElement) {
return (GroovyClassElement) element;
} else {
if (element.isWildcard() || element.isGenericPlaceholder()) {
throw new UnsupportedOperationException("Cannot convert wildcard / free type variable to GroovyClassElement");
} else {
return (GroovyClassElement) ((ArrayableClassElement) visitorContext.getClassElement(element.getName(), elementAnnotationMetadataFactory)
.orElseThrow(() -> new UnsupportedOperationException("Cannot convert ClassElement to GroovyClassElement, class was not found on the visitor context")))
.withArrayDimensions(element.getArrayDimensions())
.withTypeArguments((Collection) element.getBoundGenericTypes());
}
}
}
}