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Data Repository Support for Micronaut
/*
* Copyright 2017-2019 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.data.processor.mappers.jpa;
import edu.umd.cs.findbugs.annotations.NonNull;
import io.micronaut.core.annotation.AnnotationValue;
import io.micronaut.core.annotation.AnnotationValueBuilder;
import io.micronaut.data.annotation.Relation;
import io.micronaut.inject.annotation.NamedAnnotationMapper;
import io.micronaut.inject.visitor.VisitorContext;
import java.lang.annotation.Annotation;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
/**
* Maps JPA's {@code ManyToOne} annotation to {@link Relation}.
*
* @author graemerocher
* @since 1.0.0
*/
public class ManyToOneMapper implements NamedAnnotationMapper {
@NonNull
@Override
public String getName() {
return "javax.persistence.ManyToOne";
}
@Override
public List> map(AnnotationValue annotation, VisitorContext visitorContext) {
final AnnotationValueBuilder relationBuilder = AnnotationValue.builder(Relation.class)
.value(Relation.Kind.MANY_TO_ONE);
annotation.enumValue("cascade", Relation.Cascade.class).ifPresent(c ->
relationBuilder.member("cascade", c)
);
AnnotationValue ann = relationBuilder
.build();
boolean nullable = annotation.booleanValue("optional").orElse(true);
if (nullable) {
return Arrays.asList(
AnnotationValue.builder("javax.annotation.Nullable").build(),
ann
);
} else {
return Collections.singletonList(ann);
}
}
}