ObjectData.cs

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// 
//  Copyright 2010-2015 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.Collections.Generic;
using System.Globalization;

namespace Deveel.Data.Serialization {
    public sealed class ObjectData {
        private readonly Dictionary<string, object> values;
         
        internal ObjectData(Type entityType, IEnumerable<KeyValuePair<string, object>> values) {
            EntityType = entityType;
            this.values = new Dictionary<string, object>();
            if (values != null) {
                foreach (var pair in values) {
                    this.values[pair.Key] = pair.Value;
                }
            }
        }

        public Type EntityType { get; private set; }

        public int Count {
            get { return values.Count; }
        }

        public bool HasValue(string key) {
            if (String.IsNullOrEmpty(key))
                throw new ArgumentNullException("key");

            return values.ContainsKey(key);
        }

        public object GetValue(string key) {
            if (String.IsNullOrEmpty(key))
                throw new ArgumentNullException("key");

            object value;
            if (!values.TryGetValue(key, out value))
                return null;

            return value;
        }

        public T GetValue<T>(string key) {
            var value = GetValue(key);
            if (value == null)
                return default(T);

            if (value is T)
                return (T) value;

            if (!(value is IConvertible))
                throw new InvalidCastException();

            return (T) Convert.ChangeType(value, typeof (T), CultureInfo.InvariantCulture);
        }

        public bool GetBoolean(string key) {
            return GetValue<bool>(key);
        }

        public byte GetByte(string key) {
            return GetValue<byte>(key);
        }

        public short GetInt16(string key) {
            return GetValue<short>(key);
        }

        public int GetInt32(string key) {
            return GetValue<int>(key);
        }

        public long GetInt64(string key) {
            return GetValue<long>(key);
        }

        public float GetSingle(string key) {
            return GetValue<float>(key);
        }

        public double GetDouble(string key) {
            return GetValue<double>(key);
        }

        public string GetString(string key) {
            return GetValue<string>(key);
        }
    }
}