例: Read method

次のエージェントは、NotesStream を使用したファイルの正確なコピーの作成を示します。エージェントは、1 つのストリームを既存のファイルに関連付け、第 2 のストリームを新規ファイルに関連付けます。エージェントは、最初のストリームからバイトのブロックを読み込み、最初のストリームでストリームが終了するまで、これらを第 2 のストリームに書き込みます。

Sub Initialize
REM Set names of input and output files
  Const DIRECTORY = "c:¥StreamFiles¥"
  Const FILENAME = "domobj"
  Const EXT = ".tlb"
  Dim inPath As String, outPath As String
  inPath = DIRECTORY & FILENAME & EXT
  outPath = DIRECTORY & FILENAME & ".txt"
  
  Dim session As NotesSession
  Dim inStream As NotesStream, outStream As NotesStream
  Set session = New NotesSession
  
REM Get the input file
  Set inStream = session.CreateStream
  If Not inStream.Open(inPath, "binary") Then
    Messagebox inPath,, "Open failed"
    Exit Sub
  End If
  If inStream.Bytes = 0 Then
    Messagebox inPath,, "File has no content"
    Exit Sub
  End If
  
REM Get the output file
  Set outStream = session.CreateStream
  If Not outStream.Open(outPath, "binary") Then
    Messagebox outPath,, "Open failed"
    Exit Sub
  End If
  If outStream.Bytes <> 0 Then
    Messagebox outPath,, "File exists and has content"
    Exit Sub
  End If
  
REM Transfer input file to output file
  Do
    buffer = inStream.Read(32767)
    Call outStream.Write(buffer)
  Loop Until inStream.IsEOS
  
  Call inStream.Close
  Call outStream.Close
End Sub

次のエージェントは、最初の例に処理を追加します。文字と番号のみを最初のファイルから新規ファイルにコピーし、英数字以外の一連のバイトがある場合にはスペースを挿入します。

Sub Initialize
REM Set names of input and output files
  Const DIRECTORY = "c:¥StreamFiles¥"
  Const FILENAME = "domobj"
  Const EXT = ".tlb"
  Dim inPath As String, outPath As String
  inPath = DIRECTORY & FILENAME & EXT
  outPath = DIRECTORY & FILENAME & ".txt"
  
  Dim session As NotesSession
  Dim inStream As NotesStream, outStream As NotesStream
  Dim inBuff As Variant, outBuff() As Byte
  Set session = New NotesSession
  
REM Get the input file
  Set inStream = session.CreateStream
  If Not inStream.Open(inPath, "binary") Then
    Messagebox inPath,, "Open failed"
    Exit Sub
  End If
  If inStream.Bytes = 0 Then
    Messagebox inPath,, "File has no content"
    Exit Sub
  End If
  
REM Get the output file
  Set outStream = session.CreateStream
  If Not outStream.Open(outPath, "binary") Then
    Messagebox outPath,, "Open failed"
    Exit Sub
  End If
  If outStream.Bytes <> 0 Then
    Messagebox outPath,, "File exists and has content"
    Exit Sub
  End If
  
REM Transfer input file to output file
  prevChar = True
  Do
    inBuff = inStream.Read(32767)
    counter% = 0
REM Put alphanumeric characters in write buffer
REM First insert a space if the previous byte
REM is not alphanumeric
    Forall b In inBuff
      If (b >= 49 And b <= 57) _
      Or (b >= 65 And b <= 90) _
      Or (b >= 97 And b <= 122) Then
        If Not prevChar Then
          Redim Preserve outBuff(0 To counter%)
          outBuff(counter%) = 32
          counter% = counter% + 1
          prevChar = True
        End If
        Redim Preserve outBuff(0 To counter%)
        outBuff(counter%) = b
        counter% = counter% + 1
      Else
        prevChar = False
      End If
    End Forall
    Call outStream.Write(outBuff)
  Loop Until inStream.IsEOS
  
  Call inStream.Close
  Call outStream.Close
End Sub