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Java client for Arcus memcached

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/*
 * arcus-java-client : Arcus Java client
 * Copyright 2010-2014 NAVER Corp.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.spy.memcached.collection;

/**
 * Ascii protocol implementation for "bop position" (B+Tree find position)
 *
 * {@code
 * bop position   \r\n  = 0 or positive integer
 * END\r\n (CLIENT_ERROR, NOT_FOUND, UNREADABLE, BKEY_MISMATCH, TYPE_MISMATCH,
 * NOT_FOUND_ELEMENT)
 * }
 */
public class BTreeFindPosition {

  private static final String command = "bop position";

  private final BKeyObject bkeyObject;
  private final BTreeOrder order;
  private String str;

  public BTreeFindPosition(long longBKey, BTreeOrder order) {
    this.bkeyObject = new BKeyObject(longBKey);
    this.order = order;
  }

  public BTreeFindPosition(byte[] byteArrayBKey, BTreeOrder order) {
    this.bkeyObject = new BKeyObject(byteArrayBKey);
    this.order = order;
  }

  public String stringify() {
    if (str != null) {
      return str;
    }
    StringBuilder b = new StringBuilder();
    b.append(bkeyObject.getBKeyAsString());
    b.append(" ");
    b.append(order.getAscii());

    str = b.toString();
    return str;
  }

  public String getCommand() {
    return command;
  }

  public BKeyObject getBkeyObject() {
    return bkeyObject;
  }

  public BTreeOrder getOrder() {
    return order;
  }

}