RuledNamingConvention.cs

Go to the documentation of this file.

using System;
using System.Text;

namespace Deveel.Data.Mapping {
    public class RuledNamingConvention : INamingConvention {
        public static RuledNamingConvention SqlNaming = new RuledNamingConvention(DefaultNamingRules.LowerCase | DefaultNamingRules.UnderscoreSeparator);

        public RuledNamingConvention(DefaultNamingRules rules) {
            ValidateCaseRule(rules);
            Rules = rules;
        }

        private void ValidateCaseRule(DefaultNamingRules rules) {
            if ((rules & DefaultNamingRules.CamelCase) != 0 &&
                ((rules & DefaultNamingRules.LowerCase) != 0 ||
                (rules & DefaultNamingRules.UpperCase) != 0))
                throw new ArgumentException("Invalid casing rule.", "rules");

            // TODO: do the same for other casing rules
        }

        public DefaultNamingRules Rules { get; private set; }

        public string FormatName(string inputName) {
            var input = inputName.ToCharArray();
            var sb = new StringBuilder();

            bool upperSeen = false;
            for (int i = 0; i < input.Length; i++) {
                var c = input[i];
                if (Char.IsUpper(c)) {
                    if ((Rules & DefaultNamingRules.LowerCase) != 0) {
                        c = Char.ToLower(c);
                    } else if ((Rules & DefaultNamingRules.CamelCase) != 0) {
                        if (upperSeen) {
                            c = Char.ToLower(c);
                        }
                    }

                    upperSeen = true;
                } else if (Char.IsLower(c)) {
                    if ((Rules & DefaultNamingRules.UpperCase) != 0) {
                        c = Char.ToUpper(c);
                    }

                    upperSeen = false;
                }

                sb.Append(c);

                if (upperSeen && i > 0 && ((Rules & DefaultNamingRules.UnderscoreSeparator) != 0))
                    sb.Append('_');
            }

            return sb.ToString();
        }
    }
}