org.deegree.feature.persistence.memory
Class MemoryFeatureStoreTransaction

java.lang.Object
  org.deegree.feature.persistence.memory.MemoryFeatureStoreTransaction

All Implemented Interfaces:

FeatureStoreTransaction

 class MemoryFeatureStoreTransaction
extends Object
implements FeatureStoreTransaction

FeatureStoreTransaction implementation used by the MemoryFeatureStore.

Version:

$Revision: 21399 $, $Date: 2009-12-10 22:12:04 +0100 (Do, 10 Dez 2009) $

Author:

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

See Also:

MemoryFeatureStore

Nested Class Summary

Nested classes/interfaces inherited from interface org.deegree.feature.persistence.FeatureStoreTransaction

FeatureStoreTransaction.IDGenMode

Constructor Summary

MemoryFeatureStoreTransaction(MemoryFeatureStore store)
Creates a new MemoryFeatureStoreTransaction instance.

Method Summary

void	commit() Makes the changes persistent that have been performed in this transaction and releases the transaction instance so other clients may acquire a transaction on the FeatureStore.
FeatureStore	getStore() Returns the underlying FeatureStore instance.
int	performDelete(IdFilter filter, Lock lock) Deletes the features from the FeatureStore that are matched by the given filter.
int	performDelete(QName ftName, OperatorFilter filter, Lock lock) Deletes the features from the FeatureStore that are matched by the given filter and type.
List<String>	performInsert(FeatureCollection fc, FeatureStoreTransaction.IDGenMode mode) Inserts the member features of the given FeatureCollection into the FeatureStore.
int	performUpdate(QName ftName, List<Property<?>> replacementProps, Filter filter, Lock lock) Performs an update operation against the FeatureStore.
void	rollback() Aborts the changes that have been performed in this transaction and releases the transaction instance so other clients may acquire a transaction on the FeatureStore.

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryFeatureStoreTransaction

MemoryFeatureStoreTransaction(MemoryFeatureStore store)

Creates a new MemoryFeatureStoreTransaction instance. NOTE: This method is only supposed to be invoked by the MemoryFeatureStore.

Parameters:

store - invoking feature store instance, never null

Method Detail

commit

public void commit()
            throws FeatureStoreException

Description copied from interface: FeatureStoreTransaction

Makes the changes persistent that have been performed in this transaction and releases the transaction instance so other clients may acquire a transaction on the FeatureStore.

Specified by:

commit in interface FeatureStoreTransaction

Throws:

FeatureStoreException - if the committing fails

getStore

public FeatureStore getStore()

Description copied from interface: FeatureStoreTransaction

Returns the underlying FeatureStore instance.

Specified by:

getStore in interface FeatureStoreTransaction

Returns:

the underlying FeatureStore instance

performDelete

public int performDelete(QName ftName,
                         OperatorFilter filter,
                         Lock lock)
                  throws FeatureStoreException

Description copied from interface: FeatureStoreTransaction

Deletes the features from the FeatureStore that are matched by the given filter and type.

Specified by:

performDelete in interface FeatureStoreTransaction

Parameters:

ftName - feature type of the features to be deleted, must not be null and served by the store

filter - filter that determines the features to be deleted

lock - optional lock object, may be null

Returns:

number of deleted feature instances

Throws:

FeatureStoreException - if the deletion fails

performDelete

public int performDelete(IdFilter filter,
                         Lock lock)
                  throws FeatureStoreException

Description copied from interface: FeatureStoreTransaction

Deletes the features from the FeatureStore that are matched by the given filter.

Specified by:

performDelete in interface FeatureStoreTransaction

Parameters:

filter - filter that determines the features to be deleted

lock - optional lock object, may be null

Returns:

number of deleted feature instances

Throws:

FeatureStoreException - if the deletion fails

performInsert

public List<String> performInsert(FeatureCollection fc,
                                  FeatureStoreTransaction.IDGenMode mode)
                           throws FeatureStoreException

Description copied from interface: FeatureStoreTransaction

Inserts the member features of the given FeatureCollection into the FeatureStore.

Specified by:

performInsert in interface FeatureStoreTransaction

Parameters:

fc - contains the member features to be inserted, their types must be served by the feature store and must not be null

mode - mode for deriving the ids of the inserted objects

Returns:

feature ids of the inserted (root) features

Throws:

FeatureStoreException - if the insertion fails

performUpdate

public int performUpdate(QName ftName,
                         List<Property<?>> replacementProps,
                         Filter filter,
                         Lock lock)
                  throws FeatureStoreException

Description copied from interface: FeatureStoreTransaction

Performs an update operation against the FeatureStore.

Specified by:

performUpdate in interface FeatureStoreTransaction

Parameters:

ftName - name of the feature type of the features to be updated, must not be null and served by the store

replacementProps - properties and their replacement values

filter - selects the feature instances that are to be updated

lock - optional lock object, may be null

Returns:

number of updated feature instances

Throws:

FeatureStoreException - if the update fails

rollback

public void rollback()
              throws FeatureStoreException

Description copied from interface: FeatureStoreTransaction

Aborts the changes that have been performed in this transaction and releases the transaction instance so other clients may acquire a transaction on the FeatureStore.

Specified by:

rollback in interface FeatureStoreTransaction

Throws:

FeatureStoreException - if the rollback fails