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-rw-r--r--id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/process/dao/ProcessInstanceStore.java9
1 files changed, 9 insertions, 0 deletions
diff --git a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/process/dao/ProcessInstanceStore.java b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/process/dao/ProcessInstanceStore.java
index 582f50427..d690c37bf 100644
--- a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/process/dao/ProcessInstanceStore.java
+++ b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/process/dao/ProcessInstanceStore.java
@@ -19,6 +19,15 @@ import at.gv.egovernment.moa.id.process.ProcessInstanceState;
@Table(name = "processinstance")
public class ProcessInstanceStore {
+ /**
+ * A process instance identifier qualifies as natural primary key by satisfying these requirements
+ * ("unique, constant, required"):
+ * <ul>
+ * <li>unique value</li>
+ * <li>never changes (immutable)</li>
+ * <li>never {@code null}</li>
+ * </ul>
+ */
@Id
private String processInstanceId;