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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;

import java.util.HashSet;
import java.util.Set;

/**
 * Operation status types for collections
 */
public enum CollectionResponse {

  OK,
  END,
  NOT_FOUND,
  NOT_FOUND_ELEMENT,
  ELEMENT_EXISTS,
  CREATED_STORED,
  STORED,
  REPLACED,
  DELETED,
  DELETED_DROPPED,
  TYPE_MISMATCH,
  OVERFLOWED,
  OUT_OF_RANGE,
  ATTR_ERROR_NOT_FOUND,
  ATTR_ERROR_BAD_VALUE,
  EXIST,
  NOT_EXIST,

  UNDEFINED,
  CANCELED,

  INTERRUPT_EXCEPTION,
  EXECUTION_EXCEPTION,
  TIMEOUT_EXCEPTION,
  EXCEPTION,

  UPDATED,
  BKEY_MISMATCH,
  EFLAG_MISMATCH,

  CREATED,
  EXISTS,
  SERVER_ERROR,

  /**
   * Command pipelining result
   */
  RESPONSE,

  /**
   * read only collection
   */
  UNREADABLE,

  DUPLICATED,
  TRIMMED,
  DUPLICATED_TRIMMED,
  ATTR_MISMATCH,
  NOTHING_TO_UPDATE;

  private static final Set ENUM_STRINGS;

  static {
    CollectionResponse[] values = CollectionResponse.values();
    ENUM_STRINGS = new HashSet(values.length);
    for (CollectionResponse e : values) {
      ENUM_STRINGS.add(e.toString());
    }
  }

  public static CollectionResponse resolve(String s) {
    if (ENUM_STRINGS.contains(s)) {
      return CollectionResponse.valueOf(s);
    } else {
      return UNDEFINED;
    }
  }
}