com.hp.hpl.jena.graph.compose
Class CompositionBase

java.lang.Object
  com.hp.hpl.jena.graph.impl.GraphBase
      com.hp.hpl.jena.graph.compose.CompositionBase

All Implemented Interfaces:

Graph, GraphAdd, com.hp.hpl.jena.graph.impl.GraphWithPerform

Direct Known Subclasses:

Dyadic, Polyadic

public abstract class CompositionBase
extends com.hp.hpl.jena.graph.impl.GraphBase

Base class for graphs that are composed of multiple sub-graphs. This is to provide a home for shared functionality that was previously in Dyadic before refactoring.

Version:

CVS $Id: CompositionBase.java,v 1.2 2009/10/06 13:04:43 ian_dickinson Exp $

Author:

Ian Dickinson, moved kers' code from Dyadic to this class, added commentage, Chris Dollin (kers)

Field Summary

Fields inherited from class com.hp.hpl.jena.graph.impl.GraphBase

TOSTRING_TRIPLE_BASE, TOSTRING_TRIPLE_LIMIT

Fields inherited from interface com.hp.hpl.jena.graph.Graph

emptyGraph

Constructor Summary

CompositionBase()

Method Summary

static <T> com.hp.hpl.jena.util.iterator.ClosableIterator<T>	butNot(com.hp.hpl.jena.util.iterator.ClosableIterator<T> a, com.hp.hpl.jena.util.iterator.ClosableIterator<? extends T> b) Answer an iterator over the elements of iterator a that are not members of iterator b.
static <T> com.hp.hpl.jena.util.iterator.Filter<T>	ifIn(com.hp.hpl.jena.util.iterator.ClosableIterator<T> i) Answer a Filter that will accept any object that is an element of iterator i.
static com.hp.hpl.jena.util.iterator.Filter<Triple>	ifIn(Graph g) Answer a Filter that will accept any triple that is an edge of graph g.
static <T> com.hp.hpl.jena.util.iterator.ExtendedIterator<T>	recording(com.hp.hpl.jena.util.iterator.ClosableIterator<T> i, java.util.Set<T> seen) Answer an iterator that will record every element delived by next() in the set seen.
static <T> com.hp.hpl.jena.util.iterator.Filter<T>	reject(com.hp.hpl.jena.util.iterator.ClosableIterator<? extends T> i) Answer a Filter that will reject any element that is a member of iterator i.
static com.hp.hpl.jena.util.iterator.ExtendedIterator<Triple>	rejecting(com.hp.hpl.jena.util.iterator.ExtendedIterator<Triple> i, Graph seen) Answer an iterator over the elements of i that are not in the graph seen.
static com.hp.hpl.jena.util.iterator.ExtendedIterator<Triple>	rejecting(com.hp.hpl.jena.util.iterator.ExtendedIterator<Triple> i, java.util.Set<Triple> seen) Answer an iterator over the elements of iterator i that are not in the set seen.

Methods inherited from class com.hp.hpl.jena.graph.impl.GraphBase

add, close, contains, contains, delete, dependsOn, find, find, forTestingOnly_graphBaseFind, getBulkUpdateHandler, getCapabilities, getEventManager, getPrefixMapping, getReifier, getStatisticsHandler, getTransactionHandler, isClosed, isEmpty, isIsomorphicWith, notifyAdd, notifyDelete, performAdd, performDelete, queryHandler, size, toString, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CompositionBase

public CompositionBase()

Method Detail

reject

public static <T> com.hp.hpl.jena.util.iterator.Filter<T> reject(com.hp.hpl.jena.util.iterator.ClosableIterator<? extends T> i)

Answer a Filter that will reject any element that is a member of iterator i. As a side-effect, i will be closed.

Parameters:

i - A closable iterator

Returns:

A Filter that will accept any object not a member of i.

butNot

public static <T> com.hp.hpl.jena.util.iterator.ClosableIterator<T> butNot(com.hp.hpl.jena.util.iterator.ClosableIterator<T> a,
                                                                           com.hp.hpl.jena.util.iterator.ClosableIterator<? extends T> b)

Answer an iterator over the elements of iterator a that are not members of iterator b. As a side-effect, iterator b will be closed.

Parameters:

a - An iterator that will be filtered by rejecting the elements of b

b - A closable iterator

Returns:

The iteration of elements in a but not in b.

recording

public static <T> com.hp.hpl.jena.util.iterator.ExtendedIterator<T> recording(com.hp.hpl.jena.util.iterator.ClosableIterator<T> i,
                                                                              java.util.Set<T> seen)

Answer an iterator that will record every element delived by next() in the set seen.

Parameters:

i - A closable iterator

seen - A set that will record each element of i in turn

Returns:

An iterator that records the elements of i.

rejecting

public static com.hp.hpl.jena.util.iterator.ExtendedIterator<Triple> rejecting(com.hp.hpl.jena.util.iterator.ExtendedIterator<Triple> i,
                                                                               java.util.Set<Triple> seen)

Answer an iterator over the elements of iterator i that are not in the set seen.

Parameters:

i - An extended iterator

seen - A set of objects

Returns:

An iterator over the elements of i that are not in the set seen.

rejecting

public static com.hp.hpl.jena.util.iterator.ExtendedIterator<Triple> rejecting(com.hp.hpl.jena.util.iterator.ExtendedIterator<Triple> i,
                                                                               Graph seen)

Answer an iterator over the elements of i that are not in the graph seen.

ifIn

public static <T> com.hp.hpl.jena.util.iterator.Filter<T> ifIn(com.hp.hpl.jena.util.iterator.ClosableIterator<T> i)

Answer a Filter that will accept any object that is an element of iterator i. As a side-effect, i will be evaluated and closed.

Parameters:

i - A closable iterator

Returns:

A Filter that will accept any object in iterator i.

ifIn

public static com.hp.hpl.jena.util.iterator.Filter<Triple> ifIn(Graph g)

Answer a Filter that will accept any triple that is an edge of graph g.

Parameters:

g - A graph

Returns:

A Filter that will accept any triple that is an edge in g.