org.fcrepo.kernel.api.utils.iterators

Class GraphDifferencingIterator

java.lang.Object

com.google.common.collect.UnmodifiableIterator<T>

com.google.common.collect.AbstractIterator<com.hp.hpl.jena.graph.Triple>

org.fcrepo.kernel.api.utils.iterators.GraphDifferencingIterator

All Implemented Interfaces:

Iterator<com.hp.hpl.jena.graph.Triple>

public class GraphDifferencingIterator
extends com.google.common.collect.AbstractIterator<com.hp.hpl.jena.graph.Triple>

A wrapping Iterator that calculates two differences between a Graph A and a source Iterator B. The differences are (A - (A ∩ B)) and (B - (A ∩ B)). The ordinary output of this iterator is (B - (A ∩ B)), and after exhaustion, sets containing (A - (A ∩ B)) and (A ∩ B) are available.

Since:

Oct 24, 2013

Author:

ajs6f

Constructor Summary

Constructors

Constructor and Description
GraphDifferencingIterator(com.hp.hpl.jena.graph.Graph replacement, Iterator<com.hp.hpl.jena.graph.Triple> original) Diff a graph against a stream of triples
GraphDifferencingIterator(com.hp.hpl.jena.rdf.model.Model replacement, Iterator<com.hp.hpl.jena.graph.Triple> original) Diff a Model against a stream of triples

Method Summary

Modifier and Type	Method and Description
Iterator<com.hp.hpl.jena.graph.Triple>	common() This method will return null until the source iterator is exhausted.
protected com.hp.hpl.jena.graph.Triple	computeNext()
Iterator<com.hp.hpl.jena.graph.Triple>	notCommon() This method will return null until the source iterator is exhausted.

Methods inherited from class com.google.common.collect.AbstractIterator

endOfData, hasNext, next, peek

Methods inherited from class com.google.common.collect.UnmodifiableIterator

remove

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Detail

GraphDifferencingIterator

public GraphDifferencingIterator(com.hp.hpl.jena.rdf.model.Model replacement,
                                 Iterator<com.hp.hpl.jena.graph.Triple> original)

Diff a Model against a stream of triples

Parameters:

replacement - the replacement

original - the original

GraphDifferencingIterator

public GraphDifferencingIterator(com.hp.hpl.jena.graph.Graph replacement,
                                 Iterator<com.hp.hpl.jena.graph.Triple> original)

Diff a graph against a stream of triples

Parameters:

replacement - the replacement

original - the original

Method Detail

computeNext

protected com.hp.hpl.jena.graph.Triple computeNext()

Specified by:

computeNext in class com.google.common.collect.AbstractIterator<com.hp.hpl.jena.graph.Triple>

common

public Iterator<com.hp.hpl.jena.graph.Triple> common()

This method will return null until the source iterator is exhausted.

Returns:

The elements that turned out to be common to the two inputs.

notCommon

public Iterator<com.hp.hpl.jena.graph.Triple> notCommon()

This method will return null until the source iterator is exhausted.

Returns:

The elements that turned out not to be common to the two inputs.