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//
// DelayedTextWriter.cs
//
// Copyright (C) 2005 Novell, Inc.
//
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
using System;
using System.IO;
using System.Text;
namespace Beagle.Util {
// This allows you to delay instantiating a TextWriter
// (and thus e.g. opening a file) until the first
// write.
public class DelayedTextWriter : TextWriter {
public delegate TextWriter Builder ();
Builder builder;
TextWriter writer;
public DelayedTextWriter (Builder builder)
{
this.builder = builder;
}
public override Encoding Encoding {
get {
lock (builder) {
if (writer == null)
writer = builder ();
}
return writer.Encoding;
}
}
public override void Close ()
{
if (writer != null)
writer.Close ();
}
public override void Flush ()
{
if (writer != null)
writer.Flush ();
}
public override void Write (char value)
{
lock (builder) {
if (writer == null)
writer = builder ();
}
writer.Write (value);
}
}
}
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