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Java Source Code / Java Documentation » GIS » GeoTools 2.4.1 » org.geotools.data 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   org.geotools.data.DefaultTransaction

DefaultTransaction
public class DefaultTransaction implements Transaction(Code)
Quick implementation of Transaction api.

Please see Transaction interface for an outline of what this class is all about.


author:
   Jody Garnett, Refractions Research


Field Summary
final protected static  LoggerLOGGER
     The logger for the data module.
 Setauthorizations
    
 Stringhandle
    
 MappropertyLookup
    
 MapstateLookup
    

Constructor Summary
public  DefaultTransaction()
    
public  DefaultTransaction(String handle)
    

Method Summary
public  voidaddAuthorization(String authID)
     Provides an authorization ID allowing access to locked Features.
public synchronized  voidclose()
     Frees all State held by this Transaction.
public  voidcommit()
     Commits all modifications against this Transaction.

This implementation will call commit() on all State managed by this Transaction.

protected  voidfinalize()
    
public  SetgetAuthorizations()
     The current set of Authorization IDs held by this Transaction.
public  ObjectgetProperty(Object key)
     Implementation of getProperty.
public  StategetState(Object key)
     Returns externalized state or null if not available.
public  voidputProperty(Object key, Object value)
     Implementation of addProperty.
public  voidputState(Object key, State state)
     Remembers Externalized State for a DataSource.

This is the GOF Momento pattern: a FeatureSource is able to externalize its internal State required for Transaction support and have this class manage it.

public  voidremoveState(Object key)
     Removes state from DefaultTransaction's care.
public  voidrollback()
     Rollsback all modifications against this Transaction.

This implementation will call rollback() on all State managed by this Transaction.

public  StringtoString()
    

Field Detail
LOGGER
final protected static Logger LOGGER(Code)
The logger for the data module.



authorizations
Set authorizations(Code)
Records current Authorizations



handle
String handle(Code)
Handle used to identify Transaction for the user



propertyLookup
Map propertyLookup(Code)
Records properties by key



stateLookup
Map stateLookup(Code)
Records State by key




Constructor Detail
DefaultTransaction
public DefaultTransaction()(Code)



DefaultTransaction
public DefaultTransaction(String handle)(Code)




Method Detail
addAuthorization
public void addAuthorization(String authID) throws IOException(Code)
Provides an authorization ID allowing access to locked Features.

Remember authorizations are cleared after every commit/rollback.


Parameters:
  authID - Provided Authorization ID
throws:
  IOException - Encountered problems maintaing Transaction State
throws:
  DataSourceException - See IOException
See Also:   org.geotools.data.Transaction.setAuthorization(java.lang.String)



close
public synchronized void close()(Code)
Frees all State held by this Transaction.



commit
public void commit() throws IOException(Code)
Commits all modifications against this Transaction.

This implementation will call commit() on all State managed by this Transaction. This allows DataStores to provide their own implementation of commit().


throws:
  IOException - Encountered problem maintaining transaction state
throws:
  DataSourceException - See IOException
See Also:   org.geotools.data.Transaction.commit



finalize
protected void finalize() throws Throwable(Code)



getAuthorizations
public Set getAuthorizations()(Code)
The current set of Authorization IDs held by this Transaction.

This set is reset by the next call to commit or rollback.

Set of Authorization IDs



getProperty
public Object getProperty(Object key)(Code)
Implementation of getProperty.
See Also:   org.geotools.data.Transaction.getProperty(java.lang.Object)
Parameters:
  key -



getState
public State getState(Object key)(Code)
Returns externalized state or null if not available.

Used by DataStore implementations to externalize information required for Transaction support using the GOF Momento pattern.


Parameters:
  key - Previously externalized State.
See Also:   org.geotools.data.Transaction.getState(java.lang.Object)



putProperty
public void putProperty(Object key, Object value) throws IOException(Code)
Implementation of addProperty.
See Also:   org.geotools.data.Transaction.addProperty(java.lang.Objectjava.lang.Object)
Parameters:
  key -
Parameters:
  value -
throws:
  IOException -



putState
public void putState(Object key, State state)(Code)
Remembers Externalized State for a DataSource.

This is the GOF Momento pattern: a FeatureSource is able to externalize its internal State required for Transaction support and have this class manage it. It may retrieve this State with getState( key ).

In addition several FeatureSource implementations may share State, a common example is JDBCDataSources keeping a shared JDBC connection using the JDBC URL as a key.


Parameters:
  key - Key used to externalize State
Parameters:
  state - Externalized State (Momeneto)
throws:
  IllegalArgumentException - When Transaction already using key
See Also:   org.geotools.data.Transaction.putState(java.lang.Objectorg.geotools.data.Transaction.State)



removeState
public void removeState(Object key)(Code)
Removes state from DefaultTransaction's care.

Currently does not complain if there is no State associated with key to remove - this may change in the future.


Parameters:
  key -
throws:
  IllegalArgumentException - If no State was maintained for supplied key
See Also:   org.geotools.data.Transaction.removeState(java.lang.Object)



rollback
public void rollback() throws IOException(Code)
Rollsback all modifications against this Transaction.

This implementation will call rollback() on all State managed by this Transaction. This allows DataStores to provide their own implementation of rollback().


throws:
  IOException - Encountered problem maintaining transaction State
throws:
  DataSourceException - IOException
See Also:   org.geotools.data.Transaction.rollback



toString
public String toString()(Code)



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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