/* * The contents of this file are subject to the Mozilla Public License * Version 1.1 (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.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See * the License for the specific language governing rights and limitations * under the License. * * The Original Code is the Kowari Metadata Store. * * The Initial Developer of the Original Code is Plugged In Software Pty * Ltd (http://www.pisoftware.com, mailto:info@pisoftware.com). Portions * created by Plugged In Software Pty Ltd are Copyright (C) 2001,2002 * Plugged In Software Pty Ltd. All Rights Reserved. * * Contributor(s): N/A. * * [NOTE: The text of this Exhibit A may differ slightly from the text * of the notices in the Source Code files of the Original Code. You * should use the text of this Exhibit A rather than the text found in the * Original Code Source Code for Your Modifications.] * */ package org.mulgara.client.jrdf.util; // Java 2 standard packages import java.util.*; // Log4J import org.apache.log4j.Logger; // JRDF import org.mulgara.client.jrdf.*; import org.jrdf.util.*; /** * A VirtualClosableIteratorProxy implementation that wraps a ClosableIterator. * * @created 2004-08-16 * * @author <a href="mailto:robert.turner@tucanatech.com">Robert Turner</a> * * @version $Revision: 1.8 $ * * @modified $Date: 2005/01/05 04:57:37 $ * * @maintenanceAuthor $Author: newmana $ * * @company <A href="mailto:info@PIsoftware.com">Plugged In Software</A> * * @copyright ©2001 <a href="http://www.pisoftware.com/">Plugged In * Software Pty Ltd</a> * * @licence <a href="{@docRoot}/../../LICENCE">Mozilla Public License v1.1</a> */ public class DefaultClosableIteratorProxy<T> implements VirtualClosableIteratorProxy<T> { /** * Logger. This is named after the class. */ @SuppressWarnings("unused") private final static Logger log = Logger.getLogger(DefaultClosableIteratorProxy.class.getName()); /** does all the work */ private ClosableIterator<T> iterator = null; /** * Default Constructor * */ public DefaultClosableIteratorProxy(ClosableIterator<T> iterator) { super(); //cannot proceed without valid data if (iterator == null) { throw new IllegalArgumentException("ClosableIterator cannot be null."); } this.iterator = iterator; } /** * Closes the underlying iterator. */ public boolean close() { return this.iterator.close(); } /** * Returns <tt>true</tt> if the underlying iteration has more elements. * * @return <tt>true</tt> if the iterator has more elements. */ public boolean hasNext() { return this.iterator.hasNext(); } /** * Returns the next Triple in the underlying iterator. * * @return the next element in the iteration. * @exception NoSuchElementException iteration has no more elements. */ public T next() { return this.iterator.next(); } /** * Calls Remove on the underlying iterator. * * @exception UnsupportedOperationException if the <tt>remove</tt> * operation is not supported by this Iterator. */ public void remove() { this.iterator.remove(); } }