Facet.cs source code in C# .NET

                        Code:
                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntity / System / Data / Metadata / Edm / Facet.cs / 1 / Facet.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....], [....]
//--------------------------------------------------------------------- 
 
using System;
using System.Collections.Generic; 
using System.Data.Common;
using System.Text;
using System.Diagnostics;
 
namespace System.Data.Metadata.Edm
{ 
    ///  
    /// Class for representing a Facet object
    /// This object is Immutable (not just set to readonly) and 
    /// some parts of the system are depending on that behavior
    /// 
    [DebuggerDisplay("{Name,nq}={Value}")]
    public sealed class Facet : MetadataItem 
    {
        #region Constructors 
 
        /// 
        /// The constructor for constructing a Facet object with the facet description and a value 
        /// 
        /// The object describing this facet
        /// The value of the facet
        /// Thrown if facetDescription argument is null 
        private Facet(FacetDescription facetDescription, object value)
            :base(MetadataFlags.Readonly) 
        { 
            EntityUtil.GenericCheckArgumentNull(facetDescription, "facetDescription");
 
            _facetDescription = facetDescription;
            _value = value;
        }
 
        /// 
        /// Creates a Facet instance with the specified value for the given 
        /// facet description. 
        /// 
        /// The object describing this facet 
        /// The value of the facet
        /// Thrown if facetDescription argument is null
        internal static Facet Create(FacetDescription facetDescription, object value)
        { 
            return Create(facetDescription, value, false);
        } 
 
        /// 
        /// Creates a Facet instance with the specified value for the given 
        /// facet description.
        /// 
        /// The object describing this facet
        /// The value of the facet 
        /// true to bypass caching and known values; false otherwise.
        /// Thrown if facetDescription argument is null 
        internal static Facet Create(FacetDescription facetDescription, object value, bool bypassKnownValues) 
        {
            EntityUtil.CheckArgumentNull(facetDescription, "facetDescription"); 

            if (!bypassKnownValues)
            {
                // Reuse facets with a null value. 
                if (object.ReferenceEquals(value, null))
                { 
                    return facetDescription.NullValueFacet; 
                }
 
                // Reuse facets with a default value.
                if (object.Equals(facetDescription.DefaultValue, value))
                {
                    return facetDescription.DefaultValueFacet; 
                }
 
                // Special case boolean facets. 
                if (facetDescription.FacetType.Identity == "Edm.Boolean")
                { 
                    bool boolValue = (bool)value;
                    return facetDescription.GetBooleanFacet(boolValue);
                }
            } 

            Facet result = new Facet(facetDescription, value); 
 
            // Check the type of the value only if we know what the correct CLR type is
            if (value != null && !Helper.IsUnboundedFacetValue(result) && result.FacetType.ClrType != null) 
            {
                Type valueType = value.GetType();
                if (valueType != result.FacetType.ClrType && !result.FacetType.ClrType.IsAssignableFrom(valueType))
                { 
                    throw EntityUtil.FacetValueHasIncorrectType(result.Name, result.FacetType.ClrType, valueType, "value");
                } 
            } 

            return result; 
        }

        #endregion
 
        #region Fields
 
        /// The object describing this facet. 
        private readonly FacetDescription _facetDescription;
 
        /// The value assigned to this facet.
        private readonly object _value;

        #endregion 

        #region Properties 
 
        /// 
        /// Returns the kind of the type 
        /// 
        public override BuiltInTypeKind BuiltInTypeKind { get { return BuiltInTypeKind.Facet; } }

        ///  
        /// Gets the description object for describing the facet
        ///  
        public FacetDescription Description 
        {
            get 
            {
                return _facetDescription;
            }
        } 

        ///  
        /// Gets/Sets the name of the facet 
        /// 
        [MetadataProperty(PrimitiveTypeKind.String, false)] 
        public String Name
        {
            get
            { 
                return _facetDescription.FacetName;
            } 
        } 

        ///  
        /// Gets/Sets the type of the facet
        /// 
        [MetadataProperty(BuiltInTypeKind.EdmType, false)]
        public EdmType FacetType 
        {
            get 
            { 
                return _facetDescription.FacetType;
            } 
        }

        /// 
        /// Gets/Sets the value of the facet 
        /// 
        /// Thrown if the Facet instance is in ReadOnly state 
        [MetadataProperty(typeof(Object), false)] 
        public Object Value
        { 
            get
            {
                return _value;
            } 
        }
 
        ///  
        /// Gets the identity for this item as a string
        ///  
        internal override string Identity
        {
            get
            { 
                return _facetDescription.FacetName;
            } 
        } 

        ///  
        /// Indicates whether the value of the facet is unbounded
        /// 
        public bool IsUnbounded
        { 
            get
            { 
                return object.ReferenceEquals(Value, EdmConstants.UnboundedValue); 
            }
        } 
        #endregion

        #region Methods
        ///  
        /// Overriding System.Object.ToString to provide better String representation
        /// for this type. 
        ///  
        public override string ToString()
        { 
            return this.Name;
        }
        #endregion
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....], [....]
//--------------------------------------------------------------------- 
 
using System;
using System.Collections.Generic; 
using System.Data.Common;
using System.Text;
using System.Diagnostics;
 
namespace System.Data.Metadata.Edm
{ 
    ///  
    /// Class for representing a Facet object
    /// This object is Immutable (not just set to readonly) and 
    /// some parts of the system are depending on that behavior
    /// 
    [DebuggerDisplay("{Name,nq}={Value}")]
    public sealed class Facet : MetadataItem 
    {
        #region Constructors 
 
        /// 
        /// The constructor for constructing a Facet object with the facet description and a value 
        /// 
        /// The object describing this facet
        /// The value of the facet
        /// Thrown if facetDescription argument is null 
        private Facet(FacetDescription facetDescription, object value)
            :base(MetadataFlags.Readonly) 
        { 
            EntityUtil.GenericCheckArgumentNull(facetDescription, "facetDescription");
 
            _facetDescription = facetDescription;
            _value = value;
        }
 
        /// 
        /// Creates a Facet instance with the specified value for the given 
        /// facet description. 
        /// 
        /// The object describing this facet 
        /// The value of the facet
        /// Thrown if facetDescription argument is null
        internal static Facet Create(FacetDescription facetDescription, object value)
        { 
            return Create(facetDescription, value, false);
        } 
 
        /// 
        /// Creates a Facet instance with the specified value for the given 
        /// facet description.
        /// 
        /// The object describing this facet
        /// The value of the facet 
        /// true to bypass caching and known values; false otherwise.
        /// Thrown if facetDescription argument is null 
        internal static Facet Create(FacetDescription facetDescription, object value, bool bypassKnownValues) 
        {
            EntityUtil.CheckArgumentNull(facetDescription, "facetDescription"); 

            if (!bypassKnownValues)
            {
                // Reuse facets with a null value. 
                if (object.ReferenceEquals(value, null))
                { 
                    return facetDescription.NullValueFacet; 
                }
 
                // Reuse facets with a default value.
                if (object.Equals(facetDescription.DefaultValue, value))
                {
                    return facetDescription.DefaultValueFacet; 
                }
 
                // Special case boolean facets. 
                if (facetDescription.FacetType.Identity == "Edm.Boolean")
                { 
                    bool boolValue = (bool)value;
                    return facetDescription.GetBooleanFacet(boolValue);
                }
            } 

            Facet result = new Facet(facetDescription, value); 
 
            // Check the type of the value only if we know what the correct CLR type is
            if (value != null && !Helper.IsUnboundedFacetValue(result) && result.FacetType.ClrType != null) 
            {
                Type valueType = value.GetType();
                if (valueType != result.FacetType.ClrType && !result.FacetType.ClrType.IsAssignableFrom(valueType))
                { 
                    throw EntityUtil.FacetValueHasIncorrectType(result.Name, result.FacetType.ClrType, valueType, "value");
                } 
            } 

            return result; 
        }

        #endregion
 
        #region Fields
 
        /// The object describing this facet. 
        private readonly FacetDescription _facetDescription;
 
        /// The value assigned to this facet.
        private readonly object _value;

        #endregion 

        #region Properties 
 
        /// 
        /// Returns the kind of the type 
        /// 
        public override BuiltInTypeKind BuiltInTypeKind { get { return BuiltInTypeKind.Facet; } }

        ///  
        /// Gets the description object for describing the facet
        ///  
        public FacetDescription Description 
        {
            get 
            {
                return _facetDescription;
            }
        } 

        ///  
        /// Gets/Sets the name of the facet 
        /// 
        [MetadataProperty(PrimitiveTypeKind.String, false)] 
        public String Name
        {
            get
            { 
                return _facetDescription.FacetName;
            } 
        } 

        ///  
        /// Gets/Sets the type of the facet
        /// 
        [MetadataProperty(BuiltInTypeKind.EdmType, false)]
        public EdmType FacetType 
        {
            get 
            { 
                return _facetDescription.FacetType;
            } 
        }

        /// 
        /// Gets/Sets the value of the facet 
        /// 
        /// Thrown if the Facet instance is in ReadOnly state 
        [MetadataProperty(typeof(Object), false)] 
        public Object Value
        { 
            get
            {
                return _value;
            } 
        }
 
        ///  
        /// Gets the identity for this item as a string
        ///  
        internal override string Identity
        {
            get
            { 
                return _facetDescription.FacetName;
            } 
        } 

        ///  
        /// Indicates whether the value of the facet is unbounded
        /// 
        public bool IsUnbounded
        { 
            get
            { 
                return object.ReferenceEquals(Value, EdmConstants.UnboundedValue); 
            }
        } 
        #endregion

        #region Methods
        ///  
        /// Overriding System.Object.ToString to provide better String representation
        /// for this type. 
        ///  
        public override string ToString()
        { 
            return this.Name;
        }
        #endregion
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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Facet.cs source code in C# .NET

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