org.springframework.data.envers.repository.support.DefaultRevisionMetadata.java Source code

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Here is the source code for org.springframework.data.envers.repository.support.DefaultRevisionMetadata.java

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/*
 * Copyright 2012-2019 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 lombok.AccessLevel;
import lombok.Getter;
import lombok.NonNull;
import lombok.Value;

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;

/**
 * {@link RevisionMetadata} working with a {@link DefaultRevisionEntity}.
 * 
 * @author Oliver Gierke
 * @author Philip Huegelmeyer
 * @author Jens Schauder
 */
@Value
public class DefaultRevisionMetadata implements RevisionMetadata<Integer> {

    private final @NonNull @Getter(AccessLevel.NONE) DefaultRevisionEntity entity;

    /*
     * (non-Javadoc)
     * @see org.springframework.data.history.RevisionMetadata#getRevisionNumber()
     */
    public Optional<Integer> getRevisionNumber() {
        return Optional.ofNullable(entity.getId());
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.history.RevisionMetadata#getRevisionDate()
     */
    @Deprecated
    public Optional<LocalDateTime> getRevisionDate() {
        return getRevisionInstant().map(instant -> LocalDateTime.ofInstant(instant, ZoneOffset.systemDefault()));
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.history.RevisionMetadata#getRevisionInstant()
     */
    @Override
    public Optional<Instant> getRevisionInstant() {
        return Optional.of(Instant.ofEpochMilli(entity.getTimestamp()));
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.history.RevisionMetadata#getDelegate()
     */
    @SuppressWarnings("unchecked")
    public <T> T getDelegate() {
        return (T) entity;
    }
}