stmtiteratorimpl.java

Jena推理机

/*
  (c) Copyright 2003, 2004, 2005, 2006, 2007 Hewlett-Packard Development Company, LP
  [See end of file]
  $Id: StmtIteratorImpl.java,v 1.12 2007/01/02 11:48:30 andy_seaborne Exp $
*/

package com.hp.hpl.jena.rdf.model.impl;

import com.hp.hpl.jena.util.iterator.*;
import com.hp.hpl.jena.rdf.model.*;

import java.util.Iterator;

/** An implementation of StmtIterator.
 *
 * @author  bwm
 * @version  Release='$Name:  $' Revision='$Revision: 1.12 $' Date='$Date: 2007/01/02 11:48:30 $' 
 */


public class StmtIteratorImpl extends WrappedIterator implements StmtIterator
    {
    private Statement current;
    
    public StmtIteratorImpl( Iterator iterator )
        { super( iterator ); }

    /**
        return *and remember* the next element. It must be remembered
        so that remove works whichever next-method is called.
    */
    public Object next()
        { return current = (Statement) super.next(); }
        
    public void remove()
        {
        super.remove();
        current.remove();
        }
        
    public Statement nextStatement()
        { return (Statement) next(); }
    }

/*
 *  (c) Copyright 2000, 2003, 2004, 2005, 2006, 2007 Hewlett-Packard Development Company, LP
 *  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * StmtIteratorImpl.java
 *
 * Created on 07 August 2000, 07:04
 */