org.trippi.impl.base
Class PoolAwareTupleIterator

java.lang.Object
  org.trippi.TupleIterator
      org.trippi.impl.base.PoolAwareTupleIterator

public class PoolAwareTupleIterator
extends TupleIterator

Wraps an TupleIterator and automatically releases the associated session to the pool when closed.

Author:

cwilper@cs.cornell.edu

Field Summary

Fields inherited from class org.trippi.TupleIterator

INPUT_FORMATS, OUTPUT_FORMATS

Constructor Summary

PoolAwareTupleIterator(TupleIterator iter, TriplestoreSession session, TriplestoreSessionPool pool)

Method Summary

void	close() Close the wrapped iterator and release the session to the pool.
void	finalize() Ensure close() gets called at garbage collection time.
boolean	hasNext() Return true if there are more results.
java.lang.String[]	names() Get the names of the binding variables.
java.util.Map	next() Return the next result.
java.util.List	nextTriples(TriplePattern[] patterns) Return the next result as a List of Triple objects.

Methods inherited from class org.trippi.TupleIterator

count, fromStream, main, setAliasMap, toStream

Methods inherited from class java.lang.Object

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

Constructor Detail

PoolAwareTupleIterator

public PoolAwareTupleIterator(TupleIterator iter,
                              TriplestoreSession session,
                              TriplestoreSessionPool pool)

Method Detail

hasNext

public boolean hasNext()
                throws TrippiException

Description copied from class: TupleIterator

Return true if there are more results.

Specified by:

hasNext in class TupleIterator

Throws:

TrippiException

next

public java.util.Map next()
                   throws TrippiException

Description copied from class: TupleIterator

Return the next result.

Specified by:

next in class TupleIterator

Throws:

TrippiException

nextTriples

public java.util.List nextTriples(TriplePattern[] patterns)
                           throws TrippiException

Description copied from class: TupleIterator

Return the next result as a List of Triple objects.

Overrides:

nextTriples in class TupleIterator

Throws:

TrippiException

names

public java.lang.String[] names()
                         throws TrippiException

Description copied from class: TupleIterator

Get the names of the binding variables. These will be the keys in the map for result.

Specified by:

names in class TupleIterator

Throws:

TrippiException

close

public void close()
           throws TrippiException

Close the wrapped iterator and release the session to the pool.

Specified by:

close in class TupleIterator

Throws:

TrippiException

finalize

public void finalize()
              throws TrippiException

Ensure close() gets called at garbage collection time.

Overrides:

finalize in class TupleIterator

Throws:

TrippiException