org.geotools.data.store
Class TypeDiffState

java.lang.Object
  org.geotools.data.store.TypeDiffState

All Implemented Interfaces:

Transaction.State

public class TypeDiffState

extends java.lang.Object

implements Transaction.State

A Transaction.State that keeps a difference table.

This implementation is backed by memory, please feel free to make a scalable implementation backed by a temporary file.

Author:

Jody Garnett, Refractions Research

Constructor Summary

TypeDiffState(org.geotools.data.store.ActiveTypeEntry typeEntry)

Method Summary

void	addAuthorization(java.lang.String AuthID) Call back used for Transaction.setAuthorization()
void	commit() Will apply differences to store.
java.util.Map	diff()
FeatureReader	reader() Convience Method for a Transaction based FeatureReader.
void	rollback() Call back used for Transaction.rollback()
void	setTransaction(Transaction transaction) Provides configuration information for Transaction.State setTransaction is called with non null transaction when Transaction.State is putState into a Transaction.
FeatureWriter	writer() Convience Method for a Transaction based FeatureWriter Constructs a DiffFeatureWriter that works against this Transaction.

Methods inherited from class java.lang.Object

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

Constructor Detail

TypeDiffState

public TypeDiffState(org.geotools.data.store.ActiveTypeEntry typeEntry)

Method Detail

setTransaction

public void setTransaction(Transaction transaction)

Description copied from interface: Transaction.State

Provides configuration information for Transaction.State

setTransaction is called with non null transaction when Transaction.State is putState into a Transaction. This tranasction will be used to determine correct event notification.

setTransaction is called with null when removeState is called (usually during Transaction.close() ).

Specified by:

setTransaction in interface Transaction.State

Parameters:

transaction -

diff

public java.util.Map diff()
                   throws java.io.IOException

Throws:

java.io.IOException

addAuthorization

public void addAuthorization(java.lang.String AuthID)
                      throws java.io.IOException

Description copied from interface: Transaction.State

Call back used for Transaction.setAuthorization()

Specified by:

addAuthorization in interface Transaction.State

Throws:

java.io.IOException

See Also:

Transaction.State.addAuthorization(java.lang.String)

commit

public void commit()
            throws java.io.IOException

Will apply differences to store.

Specified by:

commit in interface Transaction.State

Throws:

java.io.IOException

See Also:

Transaction.State.commit()

rollback

public void rollback()
              throws java.io.IOException

Description copied from interface: Transaction.State

Call back used for Transaction.rollback()

Specified by:

rollback in interface Transaction.State

Throws:

java.io.IOException

See Also:

Transaction.State.rollback()

reader

public FeatureReader reader()
                     throws java.io.IOException

Convience Method for a Transaction based FeatureReader.

Constructs a DiffFeatureReader that works against this Transaction.

Returns:

FeatureReader the mask orgional contents with against the current Differences recorded by the Tansasction State

Throws:

java.io.IOException - If typeName is not Manged by this Tansaction State

writer

public FeatureWriter writer()
                     throws java.io.IOException

Convience Method for a Transaction based FeatureWriter

Constructs a DiffFeatureWriter that works against this Transaction.

Returns:

A FeatureWriter that records Differences against a FeatureReader

Throws:

java.io.IOException - If a FeatureRader could not be constucted to record differences against