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Hibernate's core ORM functionality
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.cache.spi.entry;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
import org.hibernate.engine.spi.SessionFactoryImplementor;
/**
* Structured CacheEntry format for persistent Maps.
*
* @author Gavin King
*/
public class StructuredMapCacheEntry implements CacheEntryStructure {
/**
* Access to the singleton reference
*/
public static final StructuredMapCacheEntry INSTANCE = new StructuredMapCacheEntry();
@Override
@SuppressWarnings("unchecked")
public Object structure(Object item) {
final CollectionCacheEntry entry = (CollectionCacheEntry) item;
final Serializable[] state = entry.getState();
final Map map = new HashMap( state.length );
int i = 0;
while ( i < state.length ) {
map.put( state[i++], state[i++] );
}
return map;
}
@Override
public Object destructure(Object structured, SessionFactoryImplementor factory) {
final Map map = (Map) structured;
final Serializable[] state = new Serializable[ map.size()*2 ];
int i = 0;
for ( Map.Entry me : map.entrySet() ) {
state[i++] = (Serializable) me.getKey();
state[i++] = (Serializable) me.getValue();
}
return new CollectionCacheEntry(state);
}
private StructuredMapCacheEntry() {
}
}