SystemCollatorFactory.cs

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// 
//  Copyright 2010-2014 Deveel
// 
//    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 System.Globalization;

namespace Deveel.Data.Text {
    public sealed class SystemCollatorFactory : ICollatorFactory {
        #region ICollatorFactory Members
        public ICollator CreateCollator(CultureInfo locale, CollationStrength strength, CollationDecomposition decomposition) {
            return new SystemCollator(locale);
        }
        #endregion

        #region SystemCollator
        class SystemCollator : ICollator {
            #region .ctor
            public SystemCollator(CultureInfo locale) {
                this.locale = locale;
            }
            #endregion

            #region Fields
            private CultureInfo locale;
            #endregion

            #region Properties
            public CollationDecomposition Decomposition {
                get { return CollationDecomposition.Canonical; }
            }

            public CollationStrength Strength {
                get { return CollationStrength.Identical; }
            }
            #endregion

            #region Public Methods
            public int Compare(string s1, string s2) {
                return locale.CompareInfo.Compare(s1, s2);
            }

            public bool Equals(string s1, string s2) {
                return String.Compare(s1, s2, false, locale) == 0;
            }

            public CollationKey GetCollationKey(string source) {
                throw new NotSupportedException();
            }

            public int Compare(object x, object y) {
                return Compare(x.ToString(), y.ToString());
            }

            public object Clone() {
                return new SystemCollator((CultureInfo)locale.Clone());
            }
            #endregion
        }
        #endregion
    }
}