/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jena.rdf.model.impl;
import java.util.*;
import org.apache.jena.rdf.model.* ;
import org.apache.jena.util.iterator.* ;
/** An internal class not normally of interest to application developers.
* An iterator over the nodes in a container.
*/
public class ContNodeIteratorImpl extends NiceIterator<RDFNode> implements NodeIterator
{
protected Statement recent = null;
protected final Container cont;
protected int size;
protected int index = 0;
protected int numDeleted = 0;
protected final List<Integer> moved = new ArrayList<>();
protected final Iterator<Statement> iterator;
/** Creates new ContNodeIteratorImpl */
public ContNodeIteratorImpl (Iterator<Statement>iterator, Object ignored, Container cont )
{
this.iterator = iterator;
this.cont = cont;
this.size = cont.size();
}
@Override public RDFNode next() throws NoSuchElementException
{
recent = iterator.next();
index += 1;
return recent.getObject();
}
@Override public boolean hasNext()
{ return iterator.hasNext(); }
@Override
public RDFNode nextNode() throws NoSuchElementException
{ return next(); }
@Override public void remove() throws NoSuchElementException
{
if (recent == null) throw new NoSuchElementException();
iterator.remove();
if (index > (size - numDeleted))
{
((ContainerI) cont).remove( moved.get(size-index).intValue(), recent.getObject() );
}
else
{
cont.remove( recent );
moved.add( new Integer( index ) );
}
recent = null;
numDeleted += 1;
}
}