zxing/csharp/qrcode/decoder/ErrorCorrectionLevel.cs

/*
* 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.
*/
using System;
using com.google.zxing;
using com.google.zxing.common;

namespace com.google.zxing.qrcode.decoder
{
    public sealed class ErrorCorrectionLevel
    { 
          // No, we can't use an enum here. J2ME doesn't support it.
          /**
           * L = ~7% correction
           */
          public static ErrorCorrectionLevel L = new ErrorCorrectionLevel(0, 0x01, "L");
          /**
           * M = ~15% correction
           */
          public static ErrorCorrectionLevel M = new ErrorCorrectionLevel(1, 0x00, "M");
          /**
           * Q = ~25% correction
           */
          public static ErrorCorrectionLevel Q = new ErrorCorrectionLevel(2, 0x03, "Q");
          /**
           * H = ~30% correction
           */
          public static  ErrorCorrectionLevel H = new ErrorCorrectionLevel(3, 0x02, "H");

          private static  ErrorCorrectionLevel[] FOR_BITS = {M, L, H, Q};

          private int Ordinal;
          private int bits;
          private string name;

          private ErrorCorrectionLevel(int ordinal, int bits, string name) {
            this.Ordinal = ordinal;
            this.bits = bits;
            this.name = name;
          }

          public int ordinal() {
              return Ordinal;
          }

          public int getBits() {
            return bits;
          }

          public string getName() {
            return name;
          }

          public string toString() {
            return name;
          }

          /**
           * @param bits int containing the two bits encoding a QR Code's error correction level
           * @return {@link ErrorCorrectionLevel} representing the encoded error correction level
           */
          public static ErrorCorrectionLevel forBits(int bits) {
            if (bits < 0 || bits >= FOR_BITS.Length) {
              throw new ArgumentException();
            }
            return FOR_BITS[bits];
          }
    }
}