zxing/csharp/common/ECI.cs

/*
* Copyright 2008 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.
*/
namespace com.google.zxing.common
{
    using System;
    using System.Text;

    /// <summary> A class which wraps a 2D array of bytes. The default usage is signed. If you want to use it as a
    /// unsigned container, it's up to you to do byteValue & 0xff at each location.
    /// *
    /// JAVAPORT: I'm not happy about the argument ordering throughout the file, as I always like to have
    /// the horizontal component first, but this is for compatibility with the C++ code. The original
    /// code was a 2D array of ints, but since it only ever gets assigned -1, 0, and 1, I'm going to use
    /// less memory and go with bytes.
    /// *
    /// </summary>
    /// <author>  dswitkin@google.com (Daniel Switkin)
    /// 
    /// </author>
    public abstract class ECI
    { 
          private int value;
        
          public ECI(int value) {
            this.value = value;
          }

          public int getValue() {
            return value;
          }

          public static ECI getECIByValue(int value) {
            if (value < 0 || value > 999999) {
              throw new Exception("Bad ECI value: " + value);
            }
            if (value < 900) { // Character set ECIs use 000000 - 000899
              return CharacterSetECI.getCharacterSetECIByValue(value);
            }
            throw new Exception("Unsupported ECI value: " + value);
          }

    }
}