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Java client for Arcus memcached
There is a newer version: 1.13.2
/*
 * arcus-java-client : Arcus Java client
 * Copyright 2014 JaM2in Co., Ltd.
 *
 * 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;

import net.spy.memcached.util.BTreeUtil;

/**
 * Ascii protocol implementation for "bop pwg" (B+Tree find position with get)
 * 
 * bop pwg    []\r\n
 *
 * VALUE    \r\n
 *  []  \r\n
 * END\r\n
 *
 * Failure Code
 * - NOT_FOUND
 * - NOT_FOUND_ELEMENT
 * - TYPE_MISMATCH
 * - BKEY_MISMATCH
 * - UNREADABLE
 * - CLIENT_ERROR
 * - SERVER_ERROR
 */
public class BTreeFindPositionWithGet extends CollectionGet {

	public static final int HEADER_EFLAG_POSITION = 1; // 0-based

	private static final String command = "bop pwg";

	private final BKeyObject bkeyObject;
	private final BTreeOrder order;
	private final int count;
	//private String str;

	private BKeyObject bkey;
	private byte[] eflag;
	private int bytes;

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

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

	public String stringify() {
		if (str == null) {
			StringBuilder b = new StringBuilder();
			b.append(bkeyObject.getBKeyAsString());
			b.append(" ");
			b.append(order.getAscii());
			if (count > 0) {
				b.append(" ");
				b.append(String.valueOf(count));
			}
			str = b.toString();
		}
		return str;
	}
	
	public String getCommand() {
		return command;
	}

	public BKeyObject getBkeyObject() {
		return bkeyObject;
	}

	public BTreeOrder getOrder() {
		return order;
	}

	public int getCount() {
		return count;
	}

	@Override
	public boolean headerReady(int spaceCount) {
		return spaceCount == 2;
	}

	@Override
	public byte[] getAddtionalArgs() {
		return null;
	}

	/*
	 * VALUE    \r\n
	 *  []  \r\n
	 * END\r\n
	 */
	public void decodeItemHeader(String itemHeader) {
		String[] splited = itemHeader.split(" ");

		// 
		if (splited[0].startsWith("0x")) {
			this.bkey = new BKeyObject(splited[0].substring(2));
		} else {
			this.bkey = new BKeyObject(Long.parseLong(splited[0]));
		}
		if (splited[1].startsWith("0x")) {
			//  
			this.eflag = BTreeUtil.hexStringToByteArrays(splited[1].substring(2));
			this.bytes = Integer.parseInt(splited[2]);
		} else {
			//  only
			this.bytes = Integer.parseInt(splited[1]);
		}

		this.dataLength = bytes;
	}

	public BKeyObject getBkey() {
		return bkey;
	}

	public byte[] getEflag() {
		return eflag;
	}

	public int getBytes() {
		return bytes;
	}
}