Current File : //home/waritko/yacy/source/net/yacy/cora/storage/SizeLimitedMap.java
/**
* SizeLimitedMap
* Copyright 2012 by Michael Peter Christen, mc@yacy.net, Frankfurt a. M., Germany
* First released 04.07.2012 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.io.Serializable;
import java.util.LinkedHashMap;
import java.util.Map;
public class SizeLimitedMap<K, V> extends LinkedHashMap<K, V> implements Map<K, V>, Cloneable, Serializable {
private static final long serialVersionUID = 6088727126150060068L;
private final int sizeLimit;
/** Set to true when at least one eldest entry has been removed because the map size exceeded the size limit. */
private boolean limitExceeded;
public SizeLimitedMap(int sizeLimit) {
this.sizeLimit = sizeLimit;
this.limitExceeded = false;
}
@Override protected boolean removeEldestEntry(final Map.Entry<K, V> eldest) {
boolean res = size() > this.sizeLimit;
if(res) {
this.limitExceeded = true;
}
return res;
}
/**
* @return true when the size limit has been exceeded at least one time
*/
public boolean isLimitExceeded() {
return this.limitExceeded;
}
}
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