pl.konczak.mystartupapp.sharedkernel.enversRepository.ReflectionRevisionEntityInformation.java Source code

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Here is the source code for pl.konczak.mystartupapp.sharedkernel.enversRepository.ReflectionRevisionEntityInformation.java

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/*
 * Copyright 2012 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
 *
 *      http://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 pl.konczak.mystartupapp.sharedkernel.enversRepository;

import org.hibernate.envers.RevisionNumber;
import org.springframework.data.repository.history.support.RevisionEntityInformation;
import org.springframework.data.util.AnnotationDetectionFieldCallback;
import org.springframework.util.Assert;
import org.springframework.util.ReflectionUtils;

/**
 * {@link RevisionEntityInformation} that uses reflection to inspect a property annotated with {@link RevisionNumber} to
 * find out about the revision number type.
 * 
 * @author Oliver Gierke
 */
public class ReflectionRevisionEntityInformation implements RevisionEntityInformation {

    private final Class<?> revisionEntityClass;
    private final Class<?> revisionNumberType;

    /**
     * Creates a new {@link ReflectionRevisionEntityInformation} inspecting the given revision entity class.
     * 
     * @param revisionEntityClass must not be {@literal null}.
     */
    public ReflectionRevisionEntityInformation(Class<?> revisionEntityClass) {

        Assert.notNull(revisionEntityClass);

        AnnotationDetectionFieldCallback fieldCallback = new AnnotationDetectionFieldCallback(RevisionNumber.class);
        ReflectionUtils.doWithFields(revisionEntityClass, fieldCallback);

        this.revisionNumberType = fieldCallback.getType();
        this.revisionEntityClass = revisionEntityClass;

    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.repository.history.support.RevisionEntityInformation#getRevisionNumberType()
     */
    public Class<?> getRevisionNumberType() {
        return revisionNumberType;
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.repository.history.support.RevisionEntityInformation#isDefaultRevisionEntity()
     */
    public boolean isDefaultRevisionEntity() {
        return false;
    }

    /*
     * (non-Javadoc)
     * @see org.springframework.data.repository.history.support.RevisionEntityInformation#getRevisionEntityClass()
     */
    public Class<?> getRevisionEntityClass() {
        return revisionEntityClass;
    }
}