Ejemplo n.º 1
0
        /// <summary>
        /// Get the value serializer declared for the given type.
        /// </summary>
        /// <param name="type">The value type to serialize</param>
        /// <returns>The value serializer associated with the given type</returns>
        public static ValueSerializer GetSerializerFor(Type type)
        {
            if (type == null)
            {
                throw new ArgumentNullException(nameof(type));
            }

            object value = _valueSerializers[type];

            if (value != null)
            {
                // This uses _valueSerializersLock's instance as a sentinal for null  (as opposed to not attempted yet).
                return(value == _valueSerializersLock ? null : value as ValueSerializer);
            }

            AttributeCollection      attributes = TypeDescriptor.GetAttributes(type);
            ValueSerializerAttribute attribute  = attributes[typeof(ValueSerializerAttribute)] as ValueSerializerAttribute;
            ValueSerializer          result     = null;

            if (attribute != null)
            {
                result = (ValueSerializer)Activator.CreateInstance(attribute.ValueSerializerType);
            }

            if (result == null)
            {
                if (type == typeof(string))
                {
                    result = new StringValueSerializer();
                }
                else
                {
                    // Try to use the type converter
                    TypeConverter converter = TypeConverterHelper.GetTypeConverter(type);

                    // DateTime is a special-case.  We can't use the DateTimeConverter, because it doesn't
                    // support anything other than user culture and invariant culture, and we need to specify
                    // en-us culture.
                    if (converter.GetType() == typeof(DateTimeConverter2))
                    {
                        result = new DateTimeValueSerializer();
                    }
                    else if (converter.CanConvertTo(typeof(string)) && converter.CanConvertFrom(typeof(string)) &&
                             !(converter is ReferenceConverter))
                    {
                        result = new TypeConverterValueSerializer(converter);
                    }
                }
            }
            lock (_valueSerializersLock)
            {
                // This uses _valueSerializersLock's instance as a sentinal for null (as opposed to not attempted yet).
                _valueSerializers[type] = result == null ? _valueSerializersLock : result;
            }

            return(result);
        }
Ejemplo n.º 2
0
        /// <summary>Gets the <see cref="T:System.Windows.Markup.ValueSerializer" /> declared for the specified type.</summary>
        /// <returns>The serializer associated with the specified type. May return null.</returns>
        /// <param name="type">The type to get the <see cref="T:System.Windows.Markup.ValueSerializer" /> for.</param>
        /// <exception cref="T:System.ArgumentNullException">
        ///   <paramref name="type" /> is null.</exception>
        public static ValueSerializer GetSerializerFor(Type type)
        {
            if (type == null)
            {
                throw new ArgumentNullException("type");
            }
            object obj = _valueSerializers[type];

            if (obj != null)
            {
                if (obj != _valueSerializersLock)
                {
                    return(obj as ValueSerializer);
                }
                return(null);
            }
            AttributeCollection      attributes = TypeDescriptor.GetAttributes(type);
            ValueSerializerAttribute valueSerializerAttribute = attributes[typeof(ValueSerializerAttribute)] as ValueSerializerAttribute;
            ValueSerializer          valueSerializer          = null;

            if (valueSerializerAttribute != null)
            {
                valueSerializer = (ValueSerializer)Activator.CreateInstance(valueSerializerAttribute.ValueSerializerType);
            }
            if (valueSerializer == null)
            {
                if (type == typeof(string))
                {
                    valueSerializer = new StringValueSerializer();
                }
                else
                {
                    TypeConverter typeConverter = TypeConverterHelper.GetTypeConverter(type);
                    if (typeConverter.GetType() == typeof(DateTimeConverter2))
                    {
                        valueSerializer = new DateTimeValueSerializer();
                    }
                    else if (typeConverter.CanConvertTo(typeof(string)) && typeConverter.CanConvertFrom(typeof(string)) && !(typeConverter is ReferenceConverter))
                    {
                        valueSerializer = new TypeConverterValueSerializer(typeConverter);
                    }
                }
            }
            lock (_valueSerializersLock) {
                _valueSerializers[type] = ((valueSerializer == null) ? _valueSerializersLock : valueSerializer);
                return(valueSerializer);
            }
        }