spring-data-jpa DefaultRevisionMetadata 源码
spring-data-jpa DefaultRevisionMetadata 代码
文件路径：/spring-data-envers/src/main/java/org/springframework/data/envers/repository/support/DefaultRevisionMetadata.java
/*
* Copyright 2012-2022 the original author or 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 org.springframework.data.envers.repository.support;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.util.Optional;
import org.hibernate.envers.DefaultRevisionEntity;
import org.springframework.data.history.RevisionMetadata;
import org.springframework.util.Assert;
/**
* {@link RevisionMetadata} working with a {@link DefaultRevisionEntity}. The entity/delegate itself gets ignored for
* {@link #equals(Object)} and {@link #hashCode()} since they depend on the way they were obtained.
*
* @author Oliver Gierke
* @author Philip Huegelmeyer
* @author Jens Schauder
*/
public final class DefaultRevisionMetadata implements RevisionMetadata<Integer> {
private final DefaultRevisionEntity entity;
private final RevisionType revisionType;
public DefaultRevisionMetadata(DefaultRevisionEntity entity) {
this(entity, RevisionType.UNKNOWN);
}
public DefaultRevisionMetadata(DefaultRevisionEntity entity, RevisionType revisionType) {
Assert.notNull(entity, "DefaultRevisionEntity must not be null");
this.entity = entity;
this.revisionType = revisionType;
}
public Optional<Integer> getRevisionNumber() {
return Optional.of(entity.getId());
}
@Deprecated
public Optional<LocalDateTime> getRevisionDate() {
return getRevisionInstant().map(instant -> LocalDateTime.ofInstant(instant, ZoneOffset.systemDefault()));
}
@Override
public Optional<Instant> getRevisionInstant() {
return Optional.of(Instant.ofEpochMilli(entity.getTimestamp()));
}
@SuppressWarnings("unchecked")
public <T> T getDelegate() {
return (T) entity;
}
@Override
public RevisionType getRevisionType() {
return revisionType;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
DefaultRevisionMetadata that = (DefaultRevisionMetadata) o;
return getRevisionNumber().equals(that.getRevisionNumber())
&& getRevisionInstant().equals(that.getRevisionInstant()) && revisionType.equals(that.getRevisionType());
}
@Override
public String toString() {
return "DefaultRevisionMetadata{" + "entity=" + entity + ", revisionType=" + revisionType + '}';
}
}
相关信息
相关文章
spring-data-jpa DefaultRevisionEntityInformation 源码
spring-data-jpa EnversRevisionRepository 源码
spring-data-jpa EnversRevisionRepositoryFactoryBean 源码
spring-data-jpa EnversRevisionRepositoryImpl 源码
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