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/**
* MapStore
* Copyright 2011 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
* First released 16.12.2011 at http://yacy.net
*
* $LastChangedDate: 2011-04-14 00:04:23 +0200 (Do, 14 Apr 2011) $
* $LastChangedRevision: 7653 $
* $LastChangedBy: orbiter $
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program in the file lgpl21.txt
* If not, see <http://www.gnu.org/licenses/>.
*/
package net.yacy.cora.storage;
import java.util.Map;
import net.yacy.cora.order.ByteOrder;
import net.yacy.cora.order.CloneableIterator;
/**
* this is a placeholder interface
* for the complex expressionMap<byte[], Map<String, byte[]>>
*
*/
public interface MapStore extends Map<byte[], Map<String, byte[]>>, Iterable<Map.Entry<byte[], Map<String, byte[]>>> {
/**
* the map should have an ordering on the key elements
* @return a byte order on the key elements
*/
public ByteOrder getOrdering();
/**
* the keys of the map should be iterable
* @return an iterator on the map keys
*/
public CloneableIterator<byte[]> keyIterator();
/**
* most of the MapStore implementations are file-based, so we should consider a close method
*/
public void close();
}
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