package net.spy.memcached.protocol.binary;import java.util.Collections;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 MultiGetOperationImpl {	private final ProxyCallback pcb;	/**	 * Construct an optimized get starting with the given get operation.	 */	public OptimizedGetImpl(GetOperation firstGet) {		super(Collections.<String>emptySet(), new ProxyCallback());		pcb=(ProxyCallback)getCallback();		addOperation(firstGet);	}	/**	 * Add a new GetOperation to get.	 */	public void addOperation(GetOperation o) {		pcb.addCallbacks(o);		for(String k : o.getKeys()) {			addKey(k);		}	}}