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105 lines
3.3 KiB
105 lines
3.3 KiB
#Region "Microsoft.VisualBasic::fa6149b09732c33d4438364c2e1c42c3, LINQ\Drivers\NetCDF\CDFDataSet.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 CDFDataSet
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'
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' Constructor: (+1 Overloads) Sub New
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' Function: ReadFromUri, vectorReader
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'
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' /********************************************************************************/
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#End Region
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Imports LINQ.Runtime.Drivers
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Imports Microsoft.VisualBasic.ComponentModel.DataSourceModel
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Imports Microsoft.VisualBasic.Data.IO.netCDF
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Imports Microsoft.VisualBasic.Language
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Imports Microsoft.VisualBasic.My.JavaScript
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<DriverFlag("dataframe")>
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Public Class CDFDataSet : Inherits DataSourceDriver
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''' <summary>
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'''
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''' </summary>
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''' <param name="arguments">should be variable name</param>
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Public Sub New(arguments() As String)
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MyBase.New(arguments)
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End Sub
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Public Overrides Iterator Function ReadFromUri(uri As String) As IEnumerable(Of Object)
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Using cdf As New netCDFReader(uri)
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Dim vectors As New List(Of NamedValue(Of Func(Of Integer, Object)))
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Dim size As Integer
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For Each name As String In arguments
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vectors += New NamedValue(Of Func(Of Integer, Object)) With {
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.Name = name,
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.Value = vectorReader(cdf, name, size),
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.Description = size
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}
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Next
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Dim maxSize As Integer = vectors _
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.Select(Function(v)
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Return Integer.Parse(v.Description)
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End Function) _
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.Max
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For i As Integer = 0 To maxSize - 1
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Dim obj As New JavaScriptObject
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For Each field In vectors
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obj(field.Name) = field.Value(i)
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Next
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Yield obj
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Next
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End Using
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End Function
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Private Shared Function vectorReader(cdf As netCDFReader, name As String, ByRef size As Integer) As Func(Of Integer, Object)
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Dim vec As Array = cdf.getDataVariable(name).genericValue
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size = vec.Length
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If size = 1 Then
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Dim [single] As Object = vec.GetValue(Scan0)
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Return Function(i) [single]
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Else
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Return AddressOf vec.GetValue
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End If
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End Function
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End Class
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