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81 lines
3.6 KiB
81 lines
3.6 KiB
Namespace Google.Protobuf.Reflection
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''' <summary>
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''' A collection to simplify retrieving the field accessor for a particular field.
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''' </summary>
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Public NotInheritable Class FieldCollection
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Private ReadOnly messageDescriptor As MessageDescriptor
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Friend Sub New(messageDescriptor As MessageDescriptor)
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Me.messageDescriptor = messageDescriptor
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End Sub
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''' <value>
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''' Returns the fields in the message as an immutable list, in the order in which they
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''' are declared in the source .proto file.
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''' </value>
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Public Function InDeclarationOrder() As IList(Of FieldDescriptor)
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Return messageDescriptor.fieldsInDeclarationOrder
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End Function
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''' <value>
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''' Returns the fields in the message as an immutable list, in ascending field number
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''' order. Field numbers need not be contiguous, so there is no direct mapping from the
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''' index in the list to the field number; to retrieve a field by field number, it is better
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''' to use the <see cref="FieldCollection"/> indexer.
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''' </value>
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Public Function InFieldNumberOrder() As IList(Of FieldDescriptor)
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Return messageDescriptor.fieldsInNumberOrder
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End Function
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' TODO: consider making this public in the future. (Being conservative for now...)
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''' <value>
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''' Returns a read-only dictionary mapping the field names in this message as they're available
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''' in the JSON representation to the field descriptors. For example, a field <c>foo_bar</c>
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''' in the message would result two entries, one with a key <c>fooBar</c> and one with a key
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''' <c>foo_bar</c>, both referring to the same field.
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''' </value>
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Friend Function ByJsonName() As IDictionary(Of String, FieldDescriptor)
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Return messageDescriptor.jsonFieldMap
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End Function
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''' <summary>
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''' Retrieves the descriptor for the field with the given number.
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''' </summary>
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''' <param name="number">Number of the field to retrieve the descriptor for</param>
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''' <returns>The accessor for the given field</returns>
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''' <exception cref="KeyNotFoundException">The message descriptor does not contain a field
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''' with the given number</exception>
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Default Public ReadOnly Property Item(number As Integer) As FieldDescriptor
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Get
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Dim fieldDescriptor = messageDescriptor.FindFieldByNumber(number)
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If fieldDescriptor Is Nothing Then
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Throw New KeyNotFoundException("No such field number")
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End If
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Return fieldDescriptor
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End Get
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End Property
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''' <summary>
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''' Retrieves the descriptor for the field with the given name.
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''' </summary>
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''' <param name="name">Name of the field to retrieve the descriptor for</param>
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''' <returns>The descriptor for the given field</returns>
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''' <exception cref="KeyNotFoundException">The message descriptor does not contain a field
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''' with the given name</exception>
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Default Public ReadOnly Property Item(name As String) As FieldDescriptor
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Get
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Dim fieldDescriptor = messageDescriptor.FindFieldByName(name)
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If fieldDescriptor Is Nothing Then
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Throw New KeyNotFoundException("No such field name")
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End If
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Return fieldDescriptor
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End Get
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End Property
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End Class
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End Namespace |