org.openstreetmap.osmosis.core.store
Class MultipleSourceIterator<T>

java.lang.Object
  extended by org.openstreetmap.osmosis.core.store.MultipleSourceIterator<T>
Type Parameters:
T - The type of data to be iterated over.
All Implemented Interfaces:
java.util.Iterator<T>, Releasable, ReleasableIterator<T>

public class MultipleSourceIterator<T>
extends java.lang.Object
implements ReleasableIterator<T>

Allows the contents of several iterators to be combined into a single iterator.

Author:
Brett Henderson

Constructor Summary
MultipleSourceIterator(java.util.List<ReleasableIterator<T>> sources)
          Creates a new instance.
 
Method Summary
 boolean hasNext()
          
 T 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

MultipleSourceIterator

public MultipleSourceIterator(java.util.List<ReleasableIterator<T>> sources)
Creates a new instance.

Parameters:
sources - The input iterators.
Method Detail

hasNext

public boolean hasNext()

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

next

public T next()

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

remove

public void remove()

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

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