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Java client for Arcus memcached
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/*
 * arcus-java-client : Arcus Java client
 * Copyright 2010-2014 NAVER Corp.
 * Copyright 2014-2021 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 java.nio.Buffer;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;

import net.spy.memcached.CachedData;
import net.spy.memcached.KeyUtil;
import net.spy.memcached.transcoders.Transcoder;

public class SetPipedExist extends CollectionObject {

  public static final int MAX_PIPED_ITEM_COUNT = 500;

  private static final String COMMAND = "sop exist";
  private static final String PIPE = "pipe";

  private final String key;
  private final List values;
  private final Transcoder tc;
  private int itemCount;

  public List getValues() {
    return this.values;
  }

  public int getItemCount() {
    return this.itemCount;
  }

  public SetPipedExist(String key, List values, Transcoder tc) {
    this.key = key;
    this.values = values;
    this.tc = tc;
    this.itemCount = values.size();
  }

  public ByteBuffer getAsciiCommand() {
    int capacity = 0;

    // decode values
    List encodedList = new ArrayList(values.size());
    CachedData cd = null;
    for (T each : values) {
      cd = tc.encode(each);
      encodedList.add(cd.getData());
    }

    // estimate the buffer capacity
    for (byte[] each : encodedList) {
      capacity += KeyUtil.getKeyBytes(key).length;
      capacity += each.length;
      capacity += 64;
    }

    // allocate the buffer
    ByteBuffer bb = ByteBuffer.allocate(capacity);

    // create ascii operation string
    int eSize = encodedList.size();
    for (int i = 0; i < eSize; i++) {
      byte[] each = encodedList.get(i);

      setArguments(bb, COMMAND, key, each.length,
              (i < eSize - 1) ? PIPE : "");
      bb.put(each);
      bb.put(CRLF);
    }
    // flip the buffer
    ((Buffer) bb).flip();

    return bb;
  }

  public ByteBuffer getBinaryCommand() {
    throw new RuntimeException("not supported in binary protocol yet.");
  }
}