content: /*
   * Copyright 2007 ZXing authors
   *
   * 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 com.ailiwean.core.zxing.core.qrcode.decoder;
  
  /**
   * <p>See ISO 18004:2006, 6.5.1. This enum encapsulates the four error correction levels
   * defined by the QR code standard.</p>
   *
   * @author Sean Owen
   */
  public enum ErrorCorrectionLevel {
  
    /** L = ~7% correction */
    L(0x01),
    /** M = ~15% correction */
    M(0x00),
    /** Q = ~25% correction */
    Q(0x03),
    /** H = ~30% correction */
    H(0x02);
  
    private static final ErrorCorrectionLevel[] FOR_BITS = {M, L, H, Q};
  
    private final int bits;
  
    ErrorCorrectionLevel(int bits) {
      this.bits = bits;
    }
  
    public int getBits() {
      return bits;
    }
  
    /**
     * @param bits int containing the two bits encoding a QR Code's error correction level
     * @return ErrorCorrectionLevel representing the encoded error correction level
     */
    public static ErrorCorrectionLevel forBits(int bits) {
      if (bits < 0 || bits >= FOR_BITS.length) {
        throw new IllegalArgumentException();
      }
      return FOR_BITS[bits];
    }
  
  
  }
  