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/**
* ARH
* an interface for Adaptive Replacement Handles
* Copyright 2014 by Michael Peter Christen, mc@yacy.net, Frankfurt a. M., Germany
* First released 15.01.2014 at http://yacy.net
*
* 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.Iterator;
import java.util.Set;
public interface ARH<K> extends Iterable<K> {
/**
* get the size of the ARH. this returns the sum of main and ghost cache
* @return the complete number of entries in the ARH cache
*/
public int size();
/**
* add a value to the cache.
* do not return a previous content value
* @param s
* @return true if this set did not already contain the specified element
*/
public boolean add(K s);
/**
* check if a value in the cache exist
* @param s
* @return true if the value exist
*/
public boolean contains(Object s);
/**
* delete an entry from the cache
* @param s
*/
public void delete(K s);
/**
* clear the cache
*/
public void clear();
/**
* iterator implements the Iterable interface
*/
@Override
public Iterator<K> iterator();
/**
* Return a Set view of the mappings contained in this map.
* This method is the basis for all methods that are implemented
* by a AbstractMap implementation
*
* @return a set view of the mappings contained in this map
*/
public Set<K> set();
/**
* a hash code for this ARH
* @return a hash code
*/
@Override
int hashCode();
}
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