132 lines
4.8 KiB
VB.net
132 lines
4.8 KiB
VB.net
#Region "Microsoft.VisualBasic::ddeeb7ad1a7ce33ee9840b24595558b1, Microsoft.VisualBasic.Core\Text\Xml\Linq\NodeIterator.vb"
|
||
|
||
' Author:
|
||
'
|
||
' asuka (amethyst.asuka@gcmodeller.org)
|
||
' xie (genetics@smrucc.org)
|
||
' xieguigang (xie.guigang@live.com)
|
||
'
|
||
' Copyright (c) 2018 GPL3 Licensed
|
||
'
|
||
'
|
||
' GNU GENERAL PUBLIC LICENSE (GPL3)
|
||
'
|
||
'
|
||
' This program is free software: you can redistribute it and/or modify
|
||
' it under the terms of the GNU General Public License as published by
|
||
' the Free Software Foundation, either version 3 of the License, or
|
||
' (at your option) any later version.
|
||
'
|
||
' This program is distributed in the hope that it will be useful,
|
||
' but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
' GNU General Public License for more details.
|
||
'
|
||
' You should have received a copy of the GNU General Public License
|
||
' along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
||
|
||
|
||
' /********************************************************************************/
|
||
|
||
' Summaries:
|
||
|
||
' Module NodeIterator
|
||
'
|
||
' Function: GetArrayTemplate, IterateArrayNodes
|
||
'
|
||
'
|
||
' /********************************************************************************/
|
||
|
||
#End Region
|
||
|
||
Imports System.Runtime.CompilerServices
|
||
Imports System.Xml
|
||
Imports Microsoft.VisualBasic.Language
|
||
|
||
Namespace Text.Xml.Linq
|
||
|
||
Public Module NodeIterator
|
||
|
||
Friend Const XmlDeclare$ = "<?xml version=""1.0"" encoding=""utf-16""?>"
|
||
Friend Const ArrayOfTemplate$ = XmlDeclare & "
|
||
<ArrayOf{0} xmlns:xsd=""http://www.w3.org/2001/XMLSchema"" xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"">
|
||
%s
|
||
</ArrayOf{0}>"
|
||
|
||
''' <summary>
|
||
''' 可以将模板文本之中的``%s``替换为相应的Xml数组文本
|
||
''' </summary>
|
||
''' <typeparam name="T">
|
||
''' 在.NET的XML序列化之中，数组元素的类型名称首字母会自动的被转换为大写形式
|
||
''' </typeparam>
|
||
''' <returns></returns>
|
||
<MethodImpl(MethodImplOptions.AggressiveInlining)>
|
||
Public Function GetArrayTemplate(Of T As Class)() As String
|
||
Return ArrayOfTemplate.Replace("{0}", GetType(T).GetNodeNameDefine.UpperCaseFirstChar)
|
||
End Function
|
||
|
||
''' <summary>
|
||
''' 使用<see cref="XmlDocument.Load"/>方法加载XML文档依旧是一次性的全部加载所有的文本到内存之中，第一次加载效率会比较低
|
||
''' 则可以使用这个方法来加载非常大的XML文档
|
||
''' </summary>
|
||
''' <param name="path$"></param>
|
||
''' <returns></returns>
|
||
<Extension> Public Iterator Function IterateArrayNodes(path$, tag$, Optional filter As Func(Of String, Boolean) = Nothing) As IEnumerable(Of String)
|
||
Dim buffer As New List(Of String)
|
||
Dim start$ = "<" & tag
|
||
Dim ends$ = $"</{tag}>"
|
||
Dim stack%
|
||
Dim tagOpen As Boolean = False
|
||
Dim lefts$
|
||
Dim i%
|
||
Dim xmlText$
|
||
|
||
For Each line As String In path.IterateAllLines
|
||
If tagOpen Then
|
||
|
||
i = InStr(line, ends)
|
||
|
||
If i > 0 Then
|
||
' 遇到了结束标签，则取出来
|
||
If stack > 0 Then
|
||
stack -= 1 ' 内部栈，还没有结束，则忽略当前的这个标签
|
||
Else
|
||
' 这个是真正的结束标签
|
||
lefts = Mid(line, i + ends.Length)
|
||
buffer += ends
|
||
tagOpen = False
|
||
|
||
xmlText = buffer.JoinBy(vbLf)
|
||
buffer *= 0
|
||
buffer += lefts
|
||
|
||
If Not filter Is Nothing AndAlso filter(xmlText) Then
|
||
' skip
|
||
Else
|
||
' populate data
|
||
Yield xmlText
|
||
End If
|
||
|
||
' 这里要跳出来，否则后面buffer += line处任然会添加这个结束标签行的
|
||
Continue For
|
||
End If
|
||
ElseIf InStr(line, start) > 0 Then
|
||
stack += 1
|
||
End If
|
||
|
||
buffer += line
|
||
Else
|
||
' 需要一直遍历到开始标签为止
|
||
i = InStr(line, start)
|
||
|
||
If i > 0 Then
|
||
tagOpen = True
|
||
buffer += Mid(line, i)
|
||
End If
|
||
End If
|
||
Next
|
||
End Function
|
||
End Module
|
||
End Namespace
|