AttributeTable.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / Tools / System.Activities.Presentation / System / Activities / Presentation / Base / Core / Metadata / AttributeTable.cs / 1305376 / AttributeTable.cs
                        

                        
                            //---------------------------------------------------------------- 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//---------------------------------------------------------------
namespace System.Activities.Presentation.Metadata
{ 

    using System.Activities.Presentation.Internal.Metadata; 
    using System; 
    using System.Collections;
    using System.Collections.Generic; 
    using System.ComponentModel;
    using System.Diagnostics;
    using System.Reflection;
    using System.Windows; 
    using System.Runtime;
    using System.Activities.Presentation; 
 
    // 
    // Attribute tables are essentially read-only dictionaries, but the keys 
    // and values are computed separately.  It is very efficient to ask an
    // attribute table if it contains attributes for a particular type.
    // The actual set of attributes is demand created.
    //  
    [Fx.Tag.XamlVisible(false)]
    public sealed class AttributeTable 
    { 

        private MutableAttributeTable _attributes; 

        //
        // Creates a new attribute table given dictionary information
        // from the attribute table builder. 
        //
        internal AttributeTable(MutableAttributeTable attributes) 
        { 
            Fx.Assert(attributes != null, "attributes parameter should not be null");
            _attributes = attributes; 
        }

        // 
        // Returns an enumeration of all types that have attribute overrides 
        // of some kind (on a property, on the type itself, etc).  This can be
        // used to determine what types will be refreshed when this attribute 
        // table is added to the metadata store. 
        // 
        //  
        public IEnumerable AttributedTypes
        {
            get { return _attributes.AttributedTypes; }
        } 

        // 
        // Returns our internal mutable table.  This is used 
        // by AttributeTableBuilder's AddTable method.
        // 
        internal MutableAttributeTable MutableTable
        {
            get { return _attributes; }
        } 

        //  
        // Returns true if this table contains any metadata for the given type. 
        // The metadata may be class-level metadata or metadata associated with
        // a DepenendencyProperty or MemberDescriptor.  The AttributeStore uses 
        // this method to identify loaded types that need a Refresh event raised
        // when a new attribute table is added, and to quickly decide which
        // tables should be further queried during attribute queries.
        //  
        // The type to check.
        // true if the table contains attributes for the given type. 
        // if type is null 
        public bool ContainsAttributes(Type type)
        { 
            if (type == null)
            {
                throw FxTrace.Exception.ArgumentNull("type");
            } 
            return _attributes.ContainsAttributes(type);
        } 
 
        // 
        // Returns an enumeration of all attributes provided for the 
        // given argument.  This will never return a null enumeration.
        // 
        // The type to get class-level attributes for.
        // An enumeration of attributes. 
        // if type is null
        public IEnumerable GetCustomAttributes(Type type) 
        { 
            if (type == null)
            { 
                throw FxTrace.Exception.ArgumentNull("type");
            }
            return _attributes.GetCustomAttributes(type);
        } 

        //  
        // Returns an enumeration of all attributes provided for the 
        // given argument.  This will never return a null enumeration.
        //  
        // The type that declares this descriptor.
        // A member descriptor to get custom attributes for.
        // An enumeration of attributes.
        // if descriptor is null 
        public IEnumerable GetCustomAttributes(Type ownerType, MemberDescriptor descriptor)
        { 
            if (ownerType == null) 
            {
                throw FxTrace.Exception.ArgumentNull("ownerType"); 
            }
            if (descriptor == null)
            {
                throw FxTrace.Exception.ArgumentNull("descriptor"); 
            }
            return _attributes.GetCustomAttributes(ownerType, descriptor); 
        } 

        //  
        // Returns an enumeration of all attributes provided for the
        // given argument.  This will never return a null enumeration.
        // 
        // The owner type of the dependency property. 
        // A dependency property to get custom attributes for.
        // An enumeration of attributes. 
        // if ownerType or dp is null 
        public IEnumerable GetCustomAttributes(Type ownerType, DependencyProperty dp)
        { 
            if (ownerType == null)
            {
                throw FxTrace.Exception.ArgumentNull("ownerType");
            } 
            if (dp == null)
            { 
                throw FxTrace.Exception.ArgumentNull("dp"); 
            }
            return _attributes.GetCustomAttributes(ownerType, dp); 
        }

        // 
        // Returns an enumeration of all attributes provided for the 
        // given argument.  This will never return a null enumeration.
        //  
        // The owner type of the dependency property. 
        // The member to provide attributes for.
        // An enumeration of attributes. 
        // if ownerType or member is null
        public IEnumerable GetCustomAttributes(Type ownerType, MemberInfo member)
        {
            if (ownerType == null) 
            {
                throw FxTrace.Exception.ArgumentNull("ownerType"); 
            } 
            if (member == null)
            { 
                throw FxTrace.Exception.ArgumentNull("member");
            }
            return _attributes.GetCustomAttributes(ownerType, member);
        } 

        //  
        // Returns an enumeration of all attributes provided for the 
        // given argument.  This will never return a null enumeration.
        //  
        // The owner type of the dependency property.
        // The name of the member to provide attributes for.
        // An enumeration of attributes.
        // if ownerType or member is null 
        public IEnumerable GetCustomAttributes(Type ownerType, string memberName)
        { 
            if (ownerType == null) 
            {
                throw FxTrace.Exception.ArgumentNull("ownerType"); 
            }
            if (memberName == null)
            {
                throw FxTrace.Exception.ArgumentNull("memberName"); 
            }
            return _attributes.GetCustomAttributes(ownerType, memberName); 
        } 

        // 
        // Called by the MetadataStore to walk through all the metadata and
        // ensure that it can be found on the appropriate types and members.
        // Any asserts that come from here are bugs in the type description
        // provider. 
        //
        internal void DebugValidateProvider() 
        { 
#if DEBUG
            _attributes.DebugValidateProvider(); 
#else
#endif
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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