Initial revision

From-SVN: r26263

libjava/java/io/PipedWriter.java

@@ -0,0 +1,88 @@
+// PipedWriter.java - Piped character stream.
+
+/* Copyright (C) 1998, 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package java.io;
+
+/**
+ * @author Tom Tromey <tromey@cygnus.com>
+ * @date September 25, 1998 
+ */
+
+/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
+ * "The Java Language Specification", ISBN 0-201-63451-1
+ * Status:  Complete to 1.1.
+ */
+
+public class PipedWriter extends Writer
+{
+  public void close () throws IOException
+  {
+    closed = true;
+  }
+
+  public void connect (PipedReader sink) throws IOException
+  {
+    if (closed)
+      throw new IOException ("already closed");
+    if (reader != null)
+      {
+	if (reader == sink)
+	  return;
+	throw new IOException ("already connected");
+      }
+    try
+      {
+	reader = sink;
+	reader.connect(this);
+      }
+    catch (IOException e)
+      {
+	reader = null;
+	throw e;
+      }
+  }
+
+  public void flush () throws IOException
+  {
+    // We'll throw an exception if we're closed, but there's nothing
+    // else to do here.
+    if (closed)
+      throw new IOException ("closed");
+  }
+
+  public PipedWriter ()
+  {
+    super ();
+    closed = false;
+  }
+
+  public PipedWriter (PipedReader sink) throws IOException
+  {
+    super ();
+    closed = false;
+    connect (sink);
+  }
+
+  public void write (char buffer[], int offset, int count) throws IOException
+  {
+    if (closed)
+      throw new IOException ("closed");
+    reader.receive(buffer, offset, count);
+  }
+
+  boolean isClosed ()
+  {
+    return closed;
+  }
+
+  // The associated reader.
+  private PipedReader reader;
+  private boolean closed;
+}