Example usage for javax.persistence.metamodel SingularAttribute isVersion

Introduction

In this page you can find the example usage for javax.persistence.metamodel SingularAttribute isVersion.

Prototype

boolean isVersion();

Source Link

Document

Is the attribute a version attribute.

Usage

From source file:cz.datalite.dao.support.JpaMetamodelEntityInformation.java

/**
 * Returns the version attribute of the given {@link javax.persistence.metamodel.ManagedType} or {@literal null} if none available.
 * /*from   w w w  .ja va 2  s.c  o m*/
 * @param type must not be {@literal null}.
 * @return
 */
private static <T> SingularAttribute<? super T, ?> findVersionAttribute(ManagedType<T> type) {

    Set<SingularAttribute<? super T, ?>> attributes = type.getSingularAttributes();

    for (SingularAttribute<? super T, ?> attribute : attributes) {
        if (attribute.isVersion()) {
            return attribute;
        }
    }

    return null;
}

---

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

/**
 * _HACK_ too bad that JPA does not provide this entityType.getVersion();
 *
 * @see/* www . j  ava 2s  . c  om*/
 * http://stackoverflow.com/questions/13265094/generic-way-to-get-jpa-entity-version
 */
private SingularAttribute<? super E, ?> getVersionAttribute(EntityType<E> entityType) {
    for (SingularAttribute<? super E, ?> sa : entityType.getSingularAttributes()) {
        if (sa.isVersion()) {
            return sa;
        }
    }
    return null;
}

---