DirectiveProcessor 클래스
구체적인 지시문 프로세서에 대한 추상 기본 클래스입니다.
상속 계층 구조
System.Object
Microsoft.VisualStudio.TextTemplating.DirectiveProcessor
Microsoft.VisualStudio.TextTemplating.ParameterDirectiveProcessor
Microsoft.VisualStudio.TextTemplating.RequiresProvidesDirectiveProcessor
네임스페이스: Microsoft.VisualStudio.TextTemplating
어셈블리: Microsoft.VisualStudio.TextTemplating.11.0(Microsoft.VisualStudio.TextTemplating.11.0.dll)
구문
‘선언
Public MustInherit Class DirectiveProcessor _
Implements IDirectiveProcessor
public abstract class DirectiveProcessor : IDirectiveProcessor
public ref class DirectiveProcessor abstract : IDirectiveProcessor
[<AbstractClass>]
type DirectiveProcessor =
class
interface IDirectiveProcessor
end
public abstract class DirectiveProcessor implements IDirectiveProcessor
DirectiveProcessor 형식에서는 다음과 같은 멤버를 노출합니다.
생성자
| 이름 | 설명 | |
|---|---|---|
.gif "Protected 메서드") |
DirectiveProcessor | 파생 클래스에서 재정의된 경우 DirectiveProcessor 클래스의 새 인스턴스를 초기화합니다. |
위쪽
속성
| 이름 | 설명 | |
|---|---|---|
.gif "Protected 속성") |
Errors | 지시문을 처리 하는 동안 발생 한 오류를 가져옵니다. |
위쪽
메서드
| 이름 | 설명 | |
|---|---|---|
.gif "Public 메서드") |
Equals | 지정한 개체와 현재 개체가 같은지 여부를 확인합니다. (Object에서 상속됨) |
|
Finalize | 가비지 수집에서 회수하기 전에 개체에서 리소스를 해제하고 다른 정리 작업을 수행할 수 있게 합니다. (Object에서 상속됨) |
|
FinishProcessingRun | 파생 클래스에서 재정의된 경우 일련의 지시문 처리를 완료합니다. |
|
GetClassCodeForProcessingRun | 파생 클래스에서 재정의된 경우 생성된 변환 클래스에 추가할 코드를 가져옵니다. |
|
GetHashCode | 특정 형식에 대한 해시 함수 역할을 합니다. (Object에서 상속됨) |
|
GetImportsForProcessingRun | 파생 클래스에서 재정의된 경우 생성된 변환 클래스로 가져올 네임스페이스를 가져옵니다. |
|
GetPostInitializationCodeForProcessingRun | 파생 클래스에서 재정의된 경우 생성된 변환 클래스의 initialize 메서드 끝에 추가할 코드를 가져옵니다. |
|
GetPreInitializationCodeForProcessingRun | 파생된 클래스에서 재정의 된 경우 생성 된 변환 클래스의 initialize 메서드를 추가 하는 코드를 가져옵니다. |
|
GetReferencesForProcessingRun | 파생 클래스에서 재정의된 경우 생성된 변환 클래스 컴파일러에 전달할 참조를 가져옵니다. |
|
GetTemplateClassCustomAttributes | 템플릿 클래스에 적용할 사용자 지정 특성을 가져옵니다. |
|
GetType | 현재 인스턴스의 Type을 가져옵니다. (Object에서 상속됨) |
|
Initialize | 파생 클래스에서 재정의된 경우 프로세서 인스턴스를 초기화합니다. |
|
IsDirectiveSupported | 파생된 클래스에서 재정의 되 면 지정 된 지시문은 지시문 프로세서를 지원 하는지 여부를 결정 합니다. |
|
MemberwiseClone | 현재 Object의 단순 복사본을 만듭니다. (Object에서 상속됨) |
|
ProcessDirective | 파생 클래스에서 재정의된 경우 템플릿 파일로부터 단일 지시문을 처리합니다. |
|
StartProcessingRun | 파생된 클래스에서 재정의 되는 경우 지시문 처리 라운드를 시작 합니다. |
|
ToString | 현재 개체를 나타내는 문자열을 반환합니다. (Object에서 상속됨) |
위쪽
명시적 인터페이스 구현
| 이름 | 설명 | |
|---|---|---|
.gif "명시적 인터페이스 구현") .gif "Private 속성") |
IDirectiveProcessor.Errors | |
|
IDirectiveProcessor.RequiresProcessingRunIsHostSpecific | |
.gif "Private 메서드") |
IDirectiveProcessor.SetProcessingRunIsHostSpecific |
위쪽
설명
텍스트 템플릿 변환 프로세스에서 두 단계가 있습니다.첫 번째 단계에서 텍스트 템플릿 변환 엔진은 생성된 변환 클래스로 참조되는 클래스를 만듭니다.두 번째 단계에서 엔진은 생성된 변환 클래스를 컴파일하고 실행하여 생성된 텍스트 출력을 생성합니다.
지시문 프로세서는 생성된 변환 클래스에 코드를 추가하여 작동합니다.텍스트 템플릿에서 지시문을 호출하고 지시문을 호출한 후에 텍스트 템플릿에 쓰는 나머지 코드는 지시문에서 제공하는 기능을 사용할 수 있습니다.텍스트 템플릿에 사용자 지정 기능을 제공하기 위해 사용자 자체 사용자 지정 지시문 프로세서를 작성할 수 있습니다.
자세한 내용은 사용자 지정 T4 텍스트 템플릿 지시문 프로세서 만들기를 참조하십시오.
텍스트 템플릿 변환 엔진은 필요한 DirectiveProcessor 클래스의 단일 인스턴스를 보관합니다.
DirectiveProcessor는 상태 시스템을 구현합니다.
예를 들어, 텍스트 템플릿에 동일한 지시문 프로세서에 대한 세 지시문 호출이 있으면 엔진은 다음 순서로 다음 메서드를 호출합니다.
StartProcessingRun
예제
다음 예제에서는 사용자 지정 지시문 프로세서를 만듭니다.사용자 지정 지시문 프로세서에 XML 파일을 읽는 지시문이 들어 있습니다.지시문은 XmlDocument 변수에 XML을 저장하고 속성을 통해 XmlDocument를 노출합니다.
자세한 내용은 연습: 사용자 지정 지시문 프로세서 만들기를 참조하십시오.
using System;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Text;
using System.Xml;
using System.Xml.Serialization;
using Microsoft.VisualStudio.TextTemplating;
namespace CustomDP
{
public class CustomDirectiveProcessor : DirectiveProcessor
{
//this buffer stores the code that is added to the
//generated transformation class after all the processing is done
//---------------------------------------------------------------------
private StringBuilder codeBuffer;
//Using a Code Dom Provider creates code for the
//generated transformation class in either Visual Basic or C#.
//If you want your directive processor to support only one language, you
//can hard code the code you add to the generated transformation class.
//In that case, you do not need this field.
//--------------------------------------------------------------------------
private CodeDomProvider codeDomProvider;
//this stores the full contents of the text template that is being processed
//--------------------------------------------------------------------------
private String templateContents;
//These are the errors that occur during processing. The engine passes
//the errors to the host, and the host can decide how to display them,
//for example the the host can display the errors in the UI
//or write them to a file.
//---------------------------------------------------------------------
private CompilerErrorCollection errorsValue;
public new CompilerErrorCollection Errors
{
get { return errorsValue; }
}
//Each time this directive processor is called, it creates a new property.
//We count how many times we are called, and append "n" to each new
//property name. The property names are therefore unique.
//-----------------------------------------------------------------------------
private int directiveCount = 0;
public override void Initialize(ITextTemplatingEngineHost host)
{
//we do not need to do any initialization work
}
public override void StartProcessingRun(CodeDomProvider languageProvider, String templateContents, CompilerErrorCollection errors)
{
//the engine has passed us the language of the text template
//we will use that language to generate code later
//----------------------------------------------------------
this.codeDomProvider = languageProvider;
this.templateContents = templateContents;
this.errorsValue = errors;
this.codeBuffer = new StringBuilder();
}
//Before calling the ProcessDirective method for a directive, the
//engine calls this function to see whether the directive is supported.
//Notice that one directive processor might support many directives.
//---------------------------------------------------------------------
public override bool IsDirectiveSupported(string directiveName)
{
if (string.Compare(directiveName, "CoolDirective", StringComparison.OrdinalIgnoreCase) == 0)
{
return true;
}
if (string.Compare(directiveName, "SuperCoolDirective", StringComparison.OrdinalIgnoreCase) == 0)
{
return true;
}
return false;
}
public override void ProcessDirective(string directiveName, IDictionary<string, string> arguments)
{
if (string.Compare(directiveName, "CoolDirective", StringComparison.OrdinalIgnoreCase) == 0)
{
string fileName;
if (!arguments.TryGetValue("FileName", out fileName))
{
throw new DirectiveProcessorException("Required argument 'FileName' not specified.");
}
if (string.IsNullOrEmpty(fileName))
{
throw new DirectiveProcessorException("Argument 'FileName' is null or empty.");
}
//Now we add code to the generated transformation class.
//This directive supports either Visual Basic or C#, so we must use the
//System.CodeDom to create the code.
//If a directive supports only one language, you can hard code the code.
//--------------------------------------------------------------------------
CodeMemberField documentField = new CodeMemberField();
documentField.Name = "document" + directiveCount + "Value";
documentField.Type = new CodeTypeReference(typeof(XmlDocument));
documentField.Attributes = MemberAttributes.Private;
CodeMemberProperty documentProperty = new CodeMemberProperty();
documentProperty.Name = "Document" + directiveCount;
documentProperty.Type = new CodeTypeReference(typeof(XmlDocument));
documentProperty.Attributes = MemberAttributes.Public;
documentProperty.HasSet = false;
documentProperty.HasGet = true;
CodeExpression fieldName = new CodeFieldReferenceExpression(new CodeThisReferenceExpression(), documentField.Name);
CodeExpression booleanTest = new CodeBinaryOperatorExpression(fieldName, CodeBinaryOperatorType.IdentityEquality, new CodePrimitiveExpression(null));
CodeExpression rightSide = new CodeMethodInvokeExpression(new CodeTypeReferenceExpression("XmlReaderHelper"), "ReadXml", new CodePrimitiveExpression(fileName));
CodeStatement[] thenSteps = new CodeStatement[] { new CodeAssignStatement(fieldName, rightSide) };
CodeConditionStatement ifThen = new CodeConditionStatement(booleanTest, thenSteps);
documentProperty.GetStatements.Add(ifThen);
CodeStatement s = new CodeMethodReturnStatement(fieldName);
documentProperty.GetStatements.Add(s);
CodeGeneratorOptions options = new CodeGeneratorOptions();
options.BlankLinesBetweenMembers = true;
options.IndentString = " ";
options.VerbatimOrder = true;
options.BracingStyle = "C";
using (StringWriter writer = new StringWriter(codeBuffer, CultureInfo.InvariantCulture))
{
codeDomProvider.GenerateCodeFromMember(documentField, writer, options);
codeDomProvider.GenerateCodeFromMember(documentProperty, writer, options);
}
}//end CoolDirective
//One directive processor can contain many directives.
//If you want to support more directives, the code goes here...
//-----------------------------------------------------------------
if (string.Compare(directiveName, "supercooldirective", StringComparison.OrdinalIgnoreCase) == 0)
{
//code for SuperCoolDirective goes here...
}//end SuperCoolDirective
//Track how many times the processor has been called.
//-----------------------------------------------------------------
directiveCount++;
}//end ProcessDirective
public override void FinishProcessingRun()
{
this.codeDomProvider = null;
//important: do not do this:
//the get methods below are called after this method
//and the get methods can access this field
//-----------------------------------------------------------------
//this.codeBuffer = null;
}
public override string GetPreInitializationCodeForProcessingRun()
{
//Use this method to add code to the start of the
//Initialize() method of the generated transformation class.
//We do not need any pre-initialization, so we will just return "".
//-----------------------------------------------------------------
//GetPreInitializationCodeForProcessingRun runs before the
//Initialize() method of the base class.
//-----------------------------------------------------------------
return String.Empty;
}
public override string GetPostInitializationCodeForProcessingRun()
{
//Use this method to add code to the end of the
//Initialize() method of the generated transformation class.
//We do not need any post-initialization, so we will just return "".
//------------------------------------------------------------------
//GetPostInitializationCodeForProcessingRun runs after the
//Initialize() method of the base class.
//-----------------------------------------------------------------
return String.Empty;
}
public override string GetClassCodeForProcessingRun()
{
//Return the code to add to the generated transformation class.
//-----------------------------------------------------------------
return codeBuffer.ToString();
}
public override string[] GetReferencesForProcessingRun()
{
//This returns the references that we want to use when
//compiling the generated transformation class.
//-----------------------------------------------------------------
//We need a reference to this assembly to be able to call
//XmlReaderHelper.ReadXml from the generated transformation class.
//-----------------------------------------------------------------
return new string[]
{
"System.Xml",
this.GetType().Assembly.Location
};
}
public override string[] GetImportsForProcessingRun()
{
//This returns the imports or using statements that we want to
//add to the generated transformation class.
//-----------------------------------------------------------------
//We need CustomDP to be able to call XmlReaderHelper.ReadXml
//from the generated transformation class.
//-----------------------------------------------------------------
return new string[]
{
"System.Xml",
"CustomDP"
};
}
}//end class CustomDirectiveProcessor
//-------------------------------------------------------------------------
// the code that we are adding to the generated transformation class
// will call this method
//-------------------------------------------------------------------------
public static class XmlReaderHelper
{
public static XmlDocument ReadXml(string fileName)
{
XmlDocument d = new XmlDocument();
using (XmlTextReader reader = new XmlTextReader(fileName))
{
try
{
d.Load(reader);
}
catch (System.Xml.XmlException e)
{
throw new DirectiveProcessorException("Unable to read the XML file.", e);
}
}
return d;
}
}//end class XmlReaderHelper
}//end namespace CustomDP
Imports System
Imports System.CodeDom
Imports System.CodeDom.Compiler
Imports System.Collections.Generic
Imports System.Globalization
Imports System.IO
Imports System.Text
Imports System.Xml
Imports System.Xml.Serialization
Imports Microsoft.VisualStudio.TextTemplating
Namespace CustomDP
Public Class CustomDirectiveProcessor
Inherits DirectiveProcessor
'this buffer stores the code that is added to the
'generated transformation class after all the processing is done
'---------------------------------------------------------------
Private codeBuffer As StringBuilder
'Using a Code Dom Provider creates code for the
'generated transformation class in either Visual Basic or C#.
'If you want your directive processor to support only one language, you
'can hard code the code you add to the generated transformation class.
'In that case, you do not need this field.
'--------------------------------------------------------------------------
Private codeDomProvider As CodeDomProvider
'this stores the full contents of the text template that is being processed
'--------------------------------------------------------------------------
Private templateContents As String
'These are the errors that occur during processing. The engine passes
'the errors to the host, and the host can decide how to display them,
'for example the the host can display the errors in the UI
'or write them to a file.
'---------------------------------------------------------------------
Private errorsValue As CompilerErrorCollection
Public Shadows ReadOnly Property Errors() As CompilerErrorCollection
Get
Return errorsValue
End Get
End Property
'Each time this directive processor is called, it creates a new property.
'We count how many times we are called, and append "n" to each new
'property name. The property names are therefore unique.
'--------------------------------------------------------------------------
Private directiveCount As Integer = 0
Public Overrides Sub Initialize(ByVal host As ITextTemplatingEngineHost)
'we do not need to do any initialization work
End Sub
Public Overrides Sub StartProcessingRun(ByVal languageProvider As CodeDomProvider, ByVal templateContents As String, ByVal errors As CompilerErrorCollection)
'the engine has passed us the language of the text template
'we will use that language to generate code later
'----------------------------------------------------------
Me.codeDomProvider = languageProvider
Me.templateContents = templateContents
Me.errorsValue = errors
Me.codeBuffer = New StringBuilder()
End Sub
'Before calling the ProcessDirective method for a directive, the
'engine calls this function to see whether the directive is supported.
'Notice that one directive processor might support many directives.
'---------------------------------------------------------------------
Public Overrides Function IsDirectiveSupported(ByVal directiveName As String) As Boolean
If String.Compare(directiveName, "CoolDirective", StringComparison.OrdinalIgnoreCase) = 0 Then
Return True
End If
If String.Compare(directiveName, "SuperCoolDirective", StringComparison.OrdinalIgnoreCase) = 0 Then
Return True
End If
Return False
End Function
Public Overrides Sub ProcessDirective(ByVal directiveName As String, ByVal arguments As IDictionary(Of String, String))
If String.Compare(directiveName, "CoolDirective", StringComparison.OrdinalIgnoreCase) = 0 Then
Dim fileName As String
If Not (arguments.TryGetValue("FileName", fileName)) Then
Throw New DirectiveProcessorException("Required argument 'FileName' not specified.")
End If
If String.IsNullOrEmpty(fileName) Then
Throw New DirectiveProcessorException("Argument 'FileName' is null or empty.")
End If
'Now we add code to the generated transformation class.
'This directive supports either Visual Basic or C#, so we must use the
'System.CodeDom to create the code.
'If a directive supports only one language, you can hard code the code.
'--------------------------------------------------------------------------
Dim documentField As CodeMemberField = New CodeMemberField()
documentField.Name = "document" & directiveCount & "Value"
documentField.Type = New CodeTypeReference(GetType(XmlDocument))
documentField.Attributes = MemberAttributes.Private
Dim documentProperty As CodeMemberProperty = New CodeMemberProperty()
documentProperty.Name = "Document" & directiveCount
documentProperty.Type = New CodeTypeReference(GetType(XmlDocument))
documentProperty.Attributes = MemberAttributes.Public
documentProperty.HasSet = False
documentProperty.HasGet = True
Dim fieldName As CodeExpression = New CodeFieldReferenceExpression(New CodeThisReferenceExpression(), documentField.Name)
Dim booleanTest As CodeExpression = New CodeBinaryOperatorExpression(fieldName, CodeBinaryOperatorType.IdentityEquality, New CodePrimitiveExpression(Nothing))
Dim rightSide As CodeExpression = New CodeMethodInvokeExpression(New CodeTypeReferenceExpression("XmlReaderHelper"), "ReadXml", New CodePrimitiveExpression(fileName))
Dim thenSteps As CodeStatement() = New CodeStatement() {New CodeAssignStatement(fieldName, rightSide)}
Dim ifThen As CodeConditionStatement = New CodeConditionStatement(booleanTest, thenSteps)
documentProperty.GetStatements.Add(ifThen)
Dim s As CodeStatement = New CodeMethodReturnStatement(fieldName)
documentProperty.GetStatements.Add(s)
Dim options As CodeGeneratorOptions = New CodeGeneratorOptions()
options.BlankLinesBetweenMembers = True
options.IndentString = " "
options.VerbatimOrder = True
options.BracingStyle = "VB"
Using writer As StringWriter = New StringWriter(codeBuffer, CultureInfo.InvariantCulture)
codeDomProvider.GenerateCodeFromMember(documentField, writer, options)
codeDomProvider.GenerateCodeFromMember(documentProperty, writer, options)
End Using
End If 'CoolDirective
'One directive processor can contain many directives.
'If you want to support more directives, the code goes here...
'-----------------------------------------------------------------
If String.Compare(directiveName, "supercooldirective", StringComparison.OrdinalIgnoreCase) = 0 Then
'code for SuperCoolDirective goes here
End If 'SuperCoolDirective
'Track how many times the processor has been called.
'-----------------------------------------------------------------
directiveCount += 1
End Sub 'ProcessDirective
Public Overrides Sub FinishProcessingRun()
Me.codeDomProvider = Nothing
'important: do not do this:
'the get methods below are called after this method
'and the get methods can access this field
'-----------------------------------------------------------------
'Me.codeBuffer = Nothing
End Sub
Public Overrides Function GetPreInitializationCodeForProcessingRun() As String
'Use this method to add code to the start of the
'Initialize() method of the generated transformation class.
'We do not need any pre-initialization, so we will just return "".
'-----------------------------------------------------------------
'GetPreInitializationCodeForProcessingRun runs before the
'Initialize() method of the base class.
'-----------------------------------------------------------------
Return String.Empty
End Function
Public Overrides Function GetPostInitializationCodeForProcessingRun() As String
'Use this method to add code to the end of the
'Initialize() method of the generated transformation class.
'We do not need any post-initialization, so we will just return "".
'------------------------------------------------------------------
'GetPostInitializationCodeForProcessingRun runs after the
'Initialize() method of the base class.
'-----------------------------------------------------------------
Return String.Empty
End Function
Public Overrides Function GetClassCodeForProcessingRun() As String
'Return the code to add to the generated transformation class.
'-----------------------------------------------------------------
Return codeBuffer.ToString()
End Function
Public Overrides Function GetReferencesForProcessingRun() As String()
'This returns the references that we want to use when
'compiling the generated transformation class.
'-----------------------------------------------------------------
'We need a reference to this assembly to be able to call
'XmlReaderHelper.ReadXml from the generated transformation class.
'-----------------------------------------------------------------
Return New String() {"System.Xml", Me.GetType().Assembly.Location}
End Function
Public Overrides Function GetImportsForProcessingRun() As String()
'This returns the imports or using statements that we want to
'add to the generated transformation class.
'-----------------------------------------------------------------
'We need CustomDP to be able to call XmlReaderHelper.ReadXml
'from the generated transformation class.
'-----------------------------------------------------------------
Return New String() {"System.Xml", "CustomDP"}
End Function
End Class 'CustomDirectiveProcessor
'--------------------------------------------------------------------------
' the code that we are adding to the generated transformation class
' will call this method
'--------------------------------------------------------------------------
Public Class XmlReaderHelper
Public Shared Function ReadXml(ByVal fileName As String) As XmlDocument
Dim d As XmlDocument = New XmlDocument()
Using reader As XmlTextReader = New XmlTextReader(fileName)
Try
d.Load(reader)
Catch e As System.Xml.XmlException
Throw New DirectiveProcessorException("Unable to read the XML file.", e)
End Try
End Using
Return d
End Function
End Class 'XmlReaderHelper
End Namespace
스레드로부터의 안전성
이 형식의 모든 공용 static(Visual Basic의 경우 Shared) 멤버는 스레드로부터 안전합니다. 인터페이스 멤버는 스레드로부터 안전하지 않습니다.
참고 항목
참조
Microsoft.VisualStudio.TextTemplating 네임스페이스
RequiresProvidesDirectiveProcessor