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NCache Professional client for java.

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package com.alachisoft.ncache.jsr107;

import javax.cache.configuration.CompleteConfiguration;
import javax.cache.event.CacheEntryEvent;
import javax.cache.event.EventType;

import com.alachisoft.ncache.client.CacheEventArg;

public class NCacheEntryEventAdapter extends CacheEntryEvent {

    //private final Class keyType;
    //private final Class valueType;
    private CacheEventArg cacheEventArg;
    private String key = null;

    /**
     * @param source
     * @param eventType
     * @param cacheEventArg
     * @param key
     */
    public NCacheEntryEventAdapter(NCacheCache source, final EventType eventType, CacheEventArg cacheEventArg, String key) {
        super(source, eventType);
        final CompleteConfiguration cfg = source.getConfiguration(CompleteConfiguration.class);
        //this.keyType = cfg.getKeyType();
        //this.valueType = cfg.getValueType();
        this.cacheEventArg = cacheEventArg;
        this.key = key;
    }

    /**
     * Returns the previous value, that existed prior to the modification of the Entry value.
     *
     * @return
     */
    @Override
    public V getOldValue() {
        //throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
        if (isOldValueAvailable()) {
            return (V) cacheEventArg.getOldItem().getValue(null);
        } else {
            throw new UnsupportedOperationException("The old value is not available for key: " + getKey());
        }
    }

    /**
     * Whether the old value is available.
     *
     * @return
     */
    @Override
    public boolean isOldValueAvailable() {
        // throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
        return cacheEventArg.getOldItem().getValue(null) != null;
    }

    /**
     * Returns the key corresponding to this entry.
     *
     * @return
     */
    @Override
    public K getKey() {
        //throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
        return (K) key;
    }

    /**
     * Returns the value stored in the cache when this entry was created.
     *
     * @return
     */
    @Override
    public V getValue() {
        //throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
        return (V) cacheEventArg.getItem().getValue(null);
    }

    /**
     * @param type
     * @return
     */

    @Override
    public  T unwrap(Class type) {
        //throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
        if (type.isAssignableFrom(this.getClass()))
            return type.cast(this);

        return null;
    }

}