org.hibernate.envers.configuration.metadata.AuditEntityNameRegister Maven / Gradle / Ivy
package org.hibernate.envers.configuration.metadata;
import java.util.HashSet;
import java.util.Set;
import org.hibernate.MappingException;
/**
* A register of all audit entity names used so far.
* @author Adam Warski (adam at warski dot org)
*/
public class AuditEntityNameRegister {
private final Set auditEntityNames = new HashSet();
/**
* @param auditEntityName Name of the audit entity.
* @return True if the given audit entity name is already used.
*/
private boolean check(String auditEntityName) {
return auditEntityNames.contains(auditEntityName);
}
/**
* Register an audit entity name. If the name is already registered, an exception is thrown.
* @param auditEntityName Name of the audit entity.
*/
public void register(String auditEntityName) {
if (auditEntityNames.contains(auditEntityName)) {
throw new MappingException("The audit entity name '" + auditEntityName + "' is already registered.");
}
auditEntityNames.add(auditEntityName);
}
/**
* Creates a unique (not yet registered) audit entity name by appending consecutive numbers to the base
* name. If the base name is not yet used, it is returned unmodified.
* @param baseAuditEntityName The base entity name.
* @return
*/
public String createUnique(final String baseAuditEntityName) {
String auditEntityName = baseAuditEntityName;
int count = 1;
while (check(auditEntityName)) {
auditEntityName = baseAuditEntityName + count++;
}
return auditEntityName;
}
}