kodo.jdbc.meta
Class DateVersionIndicator

java.lang.Object
  |
  +--kodo.jdbc.meta.Indicator
        |
        +--kodo.jdbc.meta.VersionIndicator
              |
              +--kodo.jdbc.meta.ColumnVersionIndicator
                    |
                    +--kodo.jdbc.meta.DateVersionIndicator

All Implemented Interfaces:

Mapping

public class DateVersionIndicator

extends ColumnVersionIndicator

Handles optimistic lock versioning via a lock column containing timestamps in the data store.

Note that there are potentially severe granularity issues with using Date types as Version indictators... namely that some databases are not that fine grained with the date types and should instead be using VersionNumberIndicator.

Ensure that the column this indicator maps to has the granularity that is sufficient for your application.

This mapping defaults to the dictionary's preferred Date type.

Field Summary

static String

TYPE

Constructor Summary

DateVersionIndicator()

Method Summary

protected int	getDataStoreTypeCode() Return the FieldMapping type code for the type of the column.
String	getMappingType() Return the abbreviated name of this mapping, or the full class name if it is a custom mapping.
protected Object	getNextVersion(Object version) Return the next version object, given the current one (which may be null for newly-persisted objects).
protected boolean	needsRefresh(Object mem, Object db) Return true if mem is not up-to-date with db.

Methods inherited from class kodo.jdbc.meta.ColumnVersionIndicator

addMappingInfoAttributes, compareVersion, delete, fromMappingInfo, getColumn, getColumns, getJDBCType, insert, load, map, select, setColumn, synchVersion, toMappingInfo, update

Methods inherited from class kodo.jdbc.meta.VersionIndicator

getDefaults, newInstance, postLoad, toString

Methods inherited from class kodo.jdbc.meta.Indicator

delete, getDBDictionary, getMappingRepository, getOwnerMapping, getTable, insert, isCustomDelete, isCustomInsert, isCustomUpdate, refSchemaComponents, reverseMap, setOwnerMapping, update

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

TYPE

public static final String TYPE

Constructor Detail

DateVersionIndicator

public DateVersionIndicator()

Method Detail

getMappingType

public String getMappingType()

Description copied from interface: Mapping

Return the abbreviated name of this mapping, or the full class name if it is a custom mapping.

getDataStoreTypeCode

protected int getDataStoreTypeCode()

Description copied from class: ColumnVersionIndicator

Return the FieldMapping type code for the type of the column.

Overrides:

getDataStoreTypeCode in class ColumnVersionIndicator

getNextVersion

protected Object getNextVersion(Object version)

Description copied from class: ColumnVersionIndicator

Return the next version object, given the current one (which may be null for newly-persisted objects).

Overrides:

getNextVersion in class ColumnVersionIndicator

needsRefresh

protected boolean needsRefresh(Object mem,
                               Object db)

Description copied from class: ColumnVersionIndicator

Return true if mem is not up-to-date with db.

Overrides:

needsRefresh in class ColumnVersionIndicator