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#Region "Microsoft.VisualBasic::a255f72cf04e575d0c02114eada3381f, Microsoft.VisualBasic.Core\Extensions\Doc\XmlExtensions.vb"
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#End Region
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Imports System.IO
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Imports System.Reflection
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Imports System.Runtime.CompilerServices
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Imports System.Text
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Imports System.Text.RegularExpressions
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Imports System.Xml
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Imports System.Xml.Serialization
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Imports Microsoft.VisualBasic.CommandLine.Reflection
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Imports Microsoft.VisualBasic.Language
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Imports Microsoft.VisualBasic.Scripting.MetaData
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Imports Microsoft.VisualBasic.Text
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Imports Microsoft.VisualBasic.Text.Xml
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Imports r = System.Text.RegularExpressions.Regex
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<Package("Doc.Xml", Description:="Tools for read and write sbml, KEGG document, etc, xml based documents...")>
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Public Module XmlExtensions
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Public Function SafeLoadXml(Of T)(xml$,
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Optional encoding As Encodings = Encodings.Default,
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Optional preProcess As Func(Of String, String) = Nothing) As T
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Return xml.LoadXml(Of T)(encoding.CodePage, False, preProcess)
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End Function
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<Extension> Public Function LoadXml(Of T)(xmlFile$,
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Optional encoding As Encoding = Nothing,
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Optional throwEx As Boolean = True,
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Optional preprocess As Func(Of String, String) = Nothing,
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Optional stripInvalidsCharacter As Boolean = False) As T
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Dim type As Type = GetType(T)
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Dim obj As Object = xmlFile.LoadXml(
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type, encoding, throwEx,
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preprocess,
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stripInvalidsCharacter:=stripInvalidsCharacter
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)
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If obj Is Nothing Then
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Return Nothing
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Else
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Return DirectCast(obj, T)
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End If
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End Function
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Xml文件的预处理操作</param>
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<ExportAPI("LoadXml")>
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<Extension> Public Function LoadXml(xmlFile$, type As Type,
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Optional encoding As Encoding = Nothing,
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Optional ThrowEx As Boolean = True,
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Optional preprocess As Func(Of String, String) = Nothing,
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Optional stripInvalidsCharacter As Boolean = False) As Object
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If Not xmlFile.FileExists(ZERO_Nonexists:=True) Then
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Dim exMsg$ = $"{xmlFile.ToFileURL} is not exists on your file system or it is ZERO length content!"
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With New Exception(exMsg)
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Call App.LogException(.ByRef)
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If ThrowEx Then
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Throw .ByRef
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Else
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Return Nothing
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End If
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End With
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End If
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Dim xmlDoc$ = File.ReadAllText(xmlFile, encoding Or UTF8)
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If Not preprocess Is Nothing Then
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xmlDoc = preprocess(xmlDoc)
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End If
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If stripInvalidsCharacter Then
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xmlDoc = xmlDoc.StripInvalidCharacters
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End If
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Using stream As New StringReader(s:=xmlDoc)
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Try
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Dim obj = New XmlSerializer(type).Deserialize(stream)
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Return obj
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Catch ex As Exception
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ex = New Exception(type.FullName, ex)
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ex = New Exception(xmlFile.ToFileURL, ex)
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Call App.LogException(ex, MethodBase.GetCurrentMethod.GetFullName)
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#If DEBUG Then
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Call ex.PrintException
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#End If
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If ThrowEx Then
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Throw ex
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Else
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Return Nothing
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End If
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End Try
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End Using
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<Extension> Public Function GetXml(Of T)(
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obj As T,
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Optional ThrowEx As Boolean = True,
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Optional xmlEncoding As XmlEncodings = XmlEncodings.UTF16) As String
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Return GetXml(obj, GetType(T), ThrowEx, xmlEncoding)
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End Function
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Public Function GetXml(
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obj As Object,
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type As Type,
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Optional throwEx As Boolean = True,
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Optional xmlEncoding As XmlEncodings = XmlEncodings.UTF16) As String
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Try
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If xmlEncoding = XmlEncodings.UTF8 Then
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Dim stream As New MemoryStream()
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Call WriteXML(obj, type, stream, xmlEncoding)
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Dim result As String = Encoding.UTF8.GetString(stream.ToArray())
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Return result
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Else
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Dim sBuilder As New StringBuilder(1024)
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Using StreamWriter As New StringWriter(sb:=sBuilder)
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Call (New XmlSerializer(type)).Serialize(StreamWriter, obj)
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Return sBuilder.ToString
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End Using
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End If
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Catch ex As Exception
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ex = New Exception(type.ToString, ex)
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Call App.LogException(ex)
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#If DEBUG Then
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Call ex.PrintException
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#End If
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If throwEx Then
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Throw ex
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Else
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Return Nothing
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End If
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End Try
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<Extension> Public Function CodePage(xmlEncoding As XmlEncodings) As Encoding
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Select Case xmlEncoding
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Case XmlEncodings.GB2312
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Return Encodings.GB2312.CodePage
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Case XmlEncodings.UTF8
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Return UTF8WithoutBOM
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Case Else
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Return Encodings.UTF16.CodePage
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End Select
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End Function
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写入的文本文件的编码格式和XML的编码格式应该是一致的
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<param name="type"></param>
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<param name="out"></param>
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<param name="encoding"></param>
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Public Sub WriteXML(obj As Object, type As Type, ByRef out As Stream, encoding As XmlEncodings)
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Dim serializer As New XmlSerializer(type)
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Dim xtWriter As New XmlTextWriter(out, encoding.CodePage)
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Call serializer.Serialize(xtWriter, obj)
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Call xtWriter.Flush()
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End Sub
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Save the object as the XML document.
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<param name="saveXml"></param>
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</param>
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<param name="encoding">VB.NET的XML文件的默认编码格式为``utf-16``</param>
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<Extension> Public Function SaveAsXml(Of T As Class)(
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obj As T,
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saveXml As String,
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Optional throwEx As Boolean = True,
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Optional encoding As Encodings = Encodings.UTF16,
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<CallerMemberName> Optional caller As String = "") As Boolean
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Try
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Return obj _
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.GetXml(ThrowEx:=throwEx, xmlEncoding:=encoding) _
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.SaveTo(saveXml, encoding.CodePage, throwEx:=throwEx)
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Catch ex As Exception
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ex = New Exception(caller, ex)
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If throwEx Then
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Throw ex
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Else
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Call App.LogException(ex)
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Call ex.PrintException
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Return False
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End If
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End Try
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End Function
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<ExportAPI("Xml.GetAttribute")>
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<Extension> Public Function GetXmlAttrValue(str As String, Name As String) As String
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Dim m As Match = r.Match(str, Name & "\s*=\s*(("".+?"")|[^ ]*)")
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If Not m.Success Then
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Return ""
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Else
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str = m.Value.GetTagValue("=", trim:=True).Value
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End If
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If str.First = """"c AndAlso str.Last = """"c Then
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str = Mid(str, 2, Len(str) - 2)
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End If
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Return str
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End Function
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Generate a specific type object from a xml document stream.(使用一个XML文本内容创建一个XML映射对象)
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<param name="Xml">This parameter value is the document text of the xml file, not the file path of the xml file.(是Xml文件的文件内容而非文件路径)</param>
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Should this program throw the exception when the xml deserialization error happens?
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if False then this function will returns a null value instead of throw exception.
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(在进行Xml反序列化的时候是否抛出错误,默认抛出错误,否则返回一个空对象)</param>
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<Extension> Public Function LoadFromXml(Of T)(xml$, Optional throwEx As Boolean = True) As T
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Using Stream As New StringReader(s:=xml)
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Try
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Dim type As Type = GetType(T)
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Dim o As Object = New XmlSerializer(type).Deserialize(Stream)
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Return DirectCast(o, T)
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Catch ex As Exception
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Dim curMethod As String = MethodBase.GetCurrentMethod.GetFullName
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If Len(xml) <= 4096 * 100 Then
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ex = New Exception(xml, ex)
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End If
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App.LogException(ex, curMethod)
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If throwEx Then
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Throw ex
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Else
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Return Nothing
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End If
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End Try
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End Using
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End Function
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<ExportAPI("Xml.CreateObject")>
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<Extension> Public Function CreateObjectFromXml(Xml As StringBuilder, typeInfo As Type) As Object
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Dim doc As String = Xml.ToString
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Using Stream As New StringReader(doc)
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Try
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Dim obj As Object = New XmlSerializer(typeInfo).Deserialize(Stream)
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Return obj
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Catch ex As Exception
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ex = New Exception(doc, ex)
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ex = New Exception(typeInfo.FullName, ex)
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Call App.LogException(ex)
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Throw ex
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End Try
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End Using
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End Function
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使用一个XML文本内容的一个片段创建一个XML映射对象
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<param name="xml">是Xml文件的文件内容而非文件路径</param>
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<Extension> Public Function CreateObjectFromXmlFragment(Of T)(xml$, Optional preprocess As Func(Of String, String) = Nothing) As T
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Dim xmlDoc$ =
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"<?xml version=""1.0"" encoding=""UTF-8""?>" &
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ASCII.LF &
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xml
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If Not preprocess Is Nothing Then
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xmlDoc = preprocess(xmlDoc)
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End If
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Try
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Using s As New StringReader(s:=xmlDoc)
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Return DirectCast(New XmlSerializer(GetType(T)).Deserialize(s), T)
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End Using
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Catch ex As Exception
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Dim root$ = xml.GetBetween("<", ">").Split.First
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Dim file$ = App.LogErrDIR & "/" & $"{root}-{Path.GetTempFileName.BaseName}.Xml"
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Call xmlDoc.SaveTo(file)
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Throw New Exception("Details at file dump: " & file, ex)
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End Try
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End Function
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<Extension>
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Public Function SetXmlEncoding(xml As String, encoding As XmlEncodings) As String
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Dim xmlEncoding As String = Text.Xml.XmlDeclaration.XmlEncodingString(encoding)
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Dim head As String = Regex.Match(xml, XmlDoc.XmlDeclares, RegexICSng).Value
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Dim enc As String = Regex.Match(head, "encoding=""\S+""", RegexICSng).Value
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If String.IsNullOrEmpty(enc) Then
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enc = head.Replace("?>", $" encoding=""{xmlEncoding}""?>")
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Else
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enc = head.Replace(enc, $"encoding=""{xmlEncoding}""")
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End If
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xml = xml.Replace(head, enc)
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Return xml
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End Function
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<Extension>
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Public Function SetXmlStandalone(xml As String, standalone As Boolean) As String
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Dim opt As String = Text.Xml.XmlDeclaration.XmlStandaloneString(standalone)
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Dim head As String = Regex.Match(xml, XmlDoc.XmlDeclares, RegexICSng).Value
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Dim enc As String = Regex.Match(head, "standalone=""\S+""", RegexICSng).Value
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If String.IsNullOrEmpty(enc) Then
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enc = head.Replace("?>", $" standalone=""{opt}""?>")
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Else
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enc = head.Replace(enc, $"standalone=""{opt}""")
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End If
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xml = xml.Replace(head, enc)
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Return xml
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End Function
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End Module
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