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FLocal/ThirdParty/BBCode/Classes/BBCodeElementFactory.vb

102 lines
3.3 KiB

'**************************************************
' FILE : BBCodeElementFactory.vb
' AUTHOR : Paulo Santos
' CREATION : 4/30/2009 10:48:21 PM
' COPYRIGHT : Copyright <EFBFBD> 2009
' PJ on Development
' All Rights Reserved.
'
' Description:
' TODO: Add file description
'
' Change log:
' 0.1 4/30/2009 10:48:21 PM
' Paulo Santos
' Created.
'***************************************************
''' <summary>
''' Creates instances of <see cref="BBCodeElement"/>.
''' </summary>
Friend NotInheritable Class BBCodeElementFactory
Private __Parser As BBCodeParser
''' <summary>Initializes an instance of the <see cref="BBCodeElementFactory" /> class.</summary>
''' <param name="parser">The <see cref="BBCodeParser"/> that will utilize the new instance of the <see cref="BBCodeElementFactory"/>.</param>
Friend Sub New(ByVal parser As BBCodeParser)
__Parser = parser
End Sub
''' <summary>
''' Gets the <see cref="BBCodeParser"/> that utilizes this instance of the <see cref="BBCodeElementFactory"/>.
''' </summary>
Public ReadOnly Property Parser() As BBCodeParser
Get
Return __Parser
End Get
End Property
''' <summary>
''' Creates a new <see cref="BBCodeElement"/>.
''' </summary>
''' <param name="name">The name of the element.</param>
''' <param name="attributes">The attributes of the element.</param>
''' <returns>A new <see cref="BBCodeElement"/>.</returns>
Public Function CreateElement(ByVal name As String, ByVal attributes As BBCodeAttributeDictionary) As BBCodeElement
Dim el As BBCodeElement
'*
'* Check if we have a different type to create
'*
If (Parser.ElementTypes.ContainsKey(name.ToUpperInvariant())) Then
'*
'* Gets the type of the element
'*
Dim type = Parser.ElementTypes(name.ToUpperInvariant()).Type
'*
'* Check if the type IS BBCodeElement
'*
If (type.Equals(GetType(BBCodeElement))) Then
el = New BBCodeElement()
Else
'*
'* Gets the default constructor
'*
Dim ctor = type.GetConstructor(New Type() {})
If (ctor Is Nothing) Then
Throw New InvalidOperationException("The type " & type.FullName & " does not have a default constructor.")
End If
'*
'* Creates the new element.
'*
el = TryCast(ctor.Invoke(New Object() {}), BBCodeElement)
If (el Is Nothing) Then
Throw New InvalidOperationException("The type " & type.FullName & " could not be assingned to BBCodeElement.")
End If
End If
Else
el = New BBCodeElement()
End If
'*
'* Set the element properties
'*
el.SetName(name)
el.SetParser(Parser)
For Each attr In attributes
el.Attributes.Add(attr.Key, attr.Value)
Next
'*
'* Returns the created element.
'*
Return el
End Function
End Class