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package net.jxta.impl.xindice.core.data;
/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 1999 The Apache Software Foundation. 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 end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xindice" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact [email protected].
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 1999-2001, The dbXML
* Group, L.L.C., http://www.dbxmlgroup.com. For more
* information on the Apache Software Foundation, please see
* .
*
*/
import net.jxta.impl.xindice.core.DBException;
/**
* RecordSet is an interface for iterating over a set of Records.
* It is almost always returned by Filers.
*/
public interface RecordSet {
/**
* hasMoreRecords returns whether or not there are any Records
* left in the set.
*
* @return Whether there are any more Records
* @throws net.jxta.impl.xindice.core.filer.BTreeException if a DB exception occurs
*/
boolean hasMoreRecords() throws DBException;
/**
* getNextRecord returns the next Record in the set.
*
* @return The next Record
* @throws net.jxta.impl.xindice.core.filer.BTreeException if a DB exception occurs
*/
Record getNextRecord() throws DBException;
/**
* getNextKey returns the next Record's Key, and skips the
* RecordSet ahead to the next Record.
*
* @return The next Key
* @throws net.jxta.impl.xindice.core.filer.BTreeException if a DB exception occurs
*/
Key getNextKey() throws DBException;
/**
* getNextValue returns the next Record's Value, and skips the
* RecordSet ahead to the next Record.
*
* @return The next Value
* @throws net.jxta.impl.xindice.core.filer.BTreeException if a DB exception occurs
*/
Value getNextValue() throws DBException;
}