82 lines
2.9 KiB
VB.net
82 lines
2.9 KiB
VB.net
#Region "Microsoft.VisualBasic::8f5dc2d2723bf368ee62ccf0148ba17d, Microsoft.VisualBasic.Core\Data\DefaultAttribute.vb"
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' Author:
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'
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' asuka (amethyst.asuka@gcmodeller.org)
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' xie (genetics@smrucc.org)
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' xieguigang (xie.guigang@live.com)
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'
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' Copyright (c) 2018 GPL3 Licensed
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'
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'
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' GNU GENERAL PUBLIC LICENSE (GPL3)
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'
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'
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' This program is free software: you can redistribute it and/or modify
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' it under the terms of the GNU General Public License as published by
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' the Free Software Foundation, either version 3 of the License, or
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' (at your option) any later version.
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'
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' This program is distributed in the hope that it will be useful,
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' but WITHOUT ANY WARRANTY; without even the implied warranty of
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' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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' GNU General Public License for more details.
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'
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' You should have received a copy of the GNU General Public License
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' along with this program. If not, see <http://www.gnu.org/licenses/>.
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' /********************************************************************************/
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' Summaries:
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' Class DefaultAttribute
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'
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' Constructor: (+1 Overloads) Sub New
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' Function: GetDefaultAttribute, GetDefaultValues, ToString
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'
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'
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' /********************************************************************************/
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#End Region
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Imports System.ComponentModel
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Imports System.Reflection
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Imports System.Runtime.CompilerServices
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Imports Microsoft.VisualBasic.Scripting
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Namespace ComponentModel.DataSourceModel
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''' <summary>
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''' Property default value
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''' </summary>
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<AttributeUsage(AttributeTargets.Property, AllowMultiple:=False, Inherited:=True)>
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Public Class DefaultAttribute : Inherits DefaultValueAttribute
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Sub New(value As Object)
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Call MyBase.New(value)
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End Sub
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Public Overrides Function ToString() As String
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Return InputHandler.ToString(Value)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Shared Function GetDefaultValues(type As Type) As Dictionary(Of String, Object)
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Return type.Schema(PropertyAccess.Readable, PublicProperty, nonIndex:=True) _
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.ToDictionary(Function(p) p.Value.Name,
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Function(p)
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Return GetDefaultAttribute(p.Value)?.Value
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End Function)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Shared Function GetDefaultAttribute([property] As PropertyInfo) As DefaultValueAttribute
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Return [property] _
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.GetCustomAttributes(Of DefaultValueAttribute)(inherit:=True) _
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.FirstOrDefault
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End Function
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End Class
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End Namespace
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