Revision 33f9b501
Added by Markus Döring over 16 years ago
| cdmlib-model/src/main/java/eu/etaxonomy/cdm/model/common/VersionableEntity.java | ||
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import javax.persistence.*; |
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/** |
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* The class keeps track of versions via a full linked list to different version objects, or a simple updated/updatedBy property in the same object. |
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* |
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* Full versioning allows concrete subclasses to keep track of previous or later versions of an object. |
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* A different version is another (persistent) java object, but with the same UUID. |
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* The version history is established as a linked list of the version objects in time. |
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* If versioning via the linked list is used, updated/updatedBy is the same as created/createdBy (better NULL?). |
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* |
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* Versioning can be turned off and in this case this class provides updated/updatedBy to keep track of the latest change event. |
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* |
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* @author m.doering |
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* @version 1.0 |
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* @created 08-Nov-2007 13:07:01 |
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* |
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* @param <T> |
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*/ |
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@MappedSuperclass |
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public abstract class VersionableEntity<T extends VersionableEntity> extends CdmBase {
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private CdmBase previousVersion; |
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/** |
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* Returns the succeeding version of this object with the same UUID |
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* @return next, i.e. succeeding version of this object |
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*/ |
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//@OneToOne(mappedBy="previousVersion") |
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@Transient |
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public CdmBase getNextVersion(){
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this.updatedBy = updatedBy; |
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} |
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/** |
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* |
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* @return |
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*/ |
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@Temporal(TemporalType.TIMESTAMP) |
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@Version |
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@Basic(fetch = FetchType.LAZY) |
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