/*
* 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 ZXing.Common
{

    /// <summary>
    /// Superclass of classes encapsulating types ECIs, according to "Extended Channel Interpretations"
    /// 5.3 of ISO 18004.
    /// </summary>
    /// <author>Sean Owen</author>
    public abstract class ECI
    {
        /// <summary>
        /// the ECI value
        /// </summary>
        public virtual int Value { get; private set; }

        internal ECI(int val)
        {
            Value = val;
        }

        /// <param name="val">ECI value</param>
        /// <returns><see cref="ECI"/> representing ECI of given value, or null if it is legal but unsupported</returns>
        /// <throws>ArgumentException if ECI value is invalid </throws>
        public static ECI getECIByValue(int val)
        {
            if (val < 0 || val > 999999)
            {
                throw new System.ArgumentException("Bad ECI value: " + val);
            }
            if (val < 900)
            {
                // Character set ECIs use 000000 - 000899
                return CharacterSetECI.getCharacterSetECIByValue(val);
            }
            return null;
        }
    }
}