org.deegree.io.datastore.idgenerator
Class FeatureIdAssigner

java.lang.Object
  org.deegree.io.datastore.idgenerator.FeatureIdAssigner

public class FeatureIdAssigner
extends Object

Responsible for the assigning of valid FeatureIds which are a prerequisite to the insertion of features in a Datastore. For each Insert operation, a new FeatureIdAssigner instance is created.

The behaviour of assignFID(Feature, DatastoreTransaction)} depends on the Insert.ID_GEN mode in use:

GenerateNew	Prior to the assigning of new feature ids, "equal" features are looked up in the datastore and their feature ids are used.
UseExisting	For every root feature, it is checked that a feature id is present and that no feature with the same id already exists in the datastore. "Equal" subfeatures are looked up in the datastore and their feature ids are used instead of the given fids -- if however an "equal" root feature is identified, an exception is thrown.
ReplaceDuplicate	not supported yet

Version:

$Revision: 7655 $, $Date: 2007-06-26 14:53:50 +0200 (Di, 26 Jun 2007) $

Author:

Markus Schneider , last edited by: $Author: mschneider $

See Also:

DatastoreTransaction.performInsert(List)

Field Summary

static String

EXISTS_MARKER if an assigned feature id starts with this, it is already stored

Constructor Summary

FeatureIdAssigner(Insert.ID_GEN idGenMode)
Creates a new FeatureIdAssigner instance that generates new feature ids as specified.

Method Summary

void	assignFID(Feature feature, DatastoreTransaction ta) Assigns valid FeatureIds to the given feature instance and it's subfeatures.
void	markStoredFeatures() TODO mark stored features a better way

Methods inherited from class java.lang.Object

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

Field Detail

EXISTS_MARKER

public static final String EXISTS_MARKER

if an assigned feature id starts with this, it is already stored

See Also:

Constant Field Values

Constructor Detail

FeatureIdAssigner

public FeatureIdAssigner(Insert.ID_GEN idGenMode)

Creates a new FeatureIdAssigner instance that generates new feature ids as specified.

Parameters:

idGenMode -

Method Detail

assignFID

public void assignFID(Feature feature,
                      DatastoreTransaction ta)
               throws IdGenerationException

Assigns valid FeatureIds to the given feature instance and it's subfeatures.

Parameters:

feature -

ta -

Throws:

IdGenerationException

markStoredFeatures

public void markStoredFeatures()

TODO mark stored features a better way