Example usage for javax.persistence.metamodel EntityType hasVersionAttribute

Introduction

In this page you can find the example usage for javax.persistence.metamodel EntityType hasVersionAttribute.

Prototype

boolean hasVersionAttribute();

Source Link

Document

Whether the identifiable type has a version attribute.

Usage

From source file:org.querybyexample.jpa.GenericRepository.java

/**
 * Return the optimistic version value, if any.
 *///from   w  w  w  .  ja  va 2  s  . c o  m
@SuppressWarnings("unchecked")
@Transactional(readOnly = true)
public Comparable<Object> getVersion(E entity) {
    EntityType<E> entityType = entityManager.getMetamodel().entity(type);
    if (!entityType.hasVersionAttribute()) {
        return null;
    }
    return (Comparable<Object>) JpaUtil.getValue(entity, getVersionAttribute(entityType));
}

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