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Data Repository Support for Micronaut

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/*
 * Copyright 2017-2020 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.spring;

import io.micronaut.core.annotation.AnnotationValue;
import io.micronaut.core.annotation.AnnotationValueBuilder;
import io.micronaut.inject.annotation.NamedAnnotationMapper;
import io.micronaut.inject.visitor.VisitorContext;

import java.lang.annotation.Annotation;
import java.util.Collections;
import java.util.List;
import java.util.stream.Stream;

/**
 * Maps Spring's transaction annotation.
 *
 * @author graemerocher
 * @since 1.0.0
 */
public class SpringTransactionalMapper implements NamedAnnotationMapper {

    @Override
    public final String getName() {
        return "org.springframework.transaction.annotation.Transactional";
    }

    @Override
    public List> map(AnnotationValue annotation, VisitorContext visitorContext) {
        AnnotationValueBuilder builder =
                AnnotationValue.builder("io.micronaut.transaction.annotation.Transactional");
        annotation.stringValue().ifPresent(s -> {
            builder.value(s);
            builder.member("transactionManager", s);
        });

        Stream.of("propagation", "isolation", "transactionManager")
                .forEach(member -> annotation.stringValue(member).ifPresent(s -> builder.member(member, s)));
        Stream.of("rollbackForClassName", "noRollbackForClassName")
                .forEach(member -> builder.member(member, annotation.stringValues(member)));
        Stream.of("rollbackFor", "noRollbackFor")
                .forEach(member -> builder.member(member, annotation.annotationClassValues(member)));
        annotation.intValue("timeout").ifPresent(integer -> builder.member("timeout", integer));
        annotation.booleanValue("readOnly").ifPresent(bool -> builder.member("readOnly", bool));

        return Collections.singletonList(builder.build());
    }
}