package net.spy.memcached.protocol.ascii;import java.util.HashSet;import net.spy.memcached.ops.GetOperation;import net.spy.memcached.protocol.ProxyCallback;/** * Optimized Get operation for folding a bunch of gets together. */final class OptimizedGetImpl extends GetOperationImpl {	private final ProxyCallback pcb;	/**	 * Construct an optimized get starting with the given get operation.	 */	public OptimizedGetImpl(GetOperation firstGet) {		super(new HashSet<String>(), new ProxyCallback());		pcb=(ProxyCallback)getCallback();		addOperation(firstGet);	}	/**	 * Add a new GetOperation to get.	 */	public void addOperation(GetOperation o) {		getKeys().addAll(o.getKeys());		pcb.addCallbacks(o);	}}