org.openstreetmap.osmosis.core.apidb.v0_6.impl
Class DeltaToDiffReader

java.lang.Object
  extended by org.openstreetmap.osmosis.core.apidb.v0_6.impl.DeltaToDiffReader
All Implemented Interfaces:
java.util.Iterator<ChangeContainer>, Releasable, ReleasableIterator<ChangeContainer>

public class DeltaToDiffReader
extends java.lang.Object
implements ReleasableIterator<ChangeContainer>

Takes an underlying full history delta stream and converts it into a diff stream. The difference between the two is that a delta stream may contain multiple changes for a single entity, a diff stream will contain a single change for the entity to get from the beginning to end point.


Constructor Summary
DeltaToDiffReader(ReleasableIterator<ChangeContainer> sourceIterator)
          Creates a new instance.
 
Method Summary
 boolean hasNext()
          
 ChangeContainer next()
          
 void release()
          Performs resource cleanup tasks such as closing files, or database connections.
 void remove()
          
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

DeltaToDiffReader

public DeltaToDiffReader(ReleasableIterator<ChangeContainer> sourceIterator)
Creates a new instance.

Parameters:
sourceIterator - An iterator containing the full history for entities.
Method Detail

hasNext

public boolean hasNext()

Specified by:
hasNext in interface java.util.Iterator<ChangeContainer>

next

public ChangeContainer next()

Specified by:
next in interface java.util.Iterator<ChangeContainer>

remove

public void remove()

Specified by:
remove in interface java.util.Iterator<ChangeContainer>

release

public void release()
Performs resource cleanup tasks such as closing files, or database connections. This must be called after all processing is complete and may be called multiple times. Implementations must call release on any nested Releasable objects. It should be called within a finally block to ensure it is called in exception scenarios.

Specified by:
release in interface Releasable