Initial revision

From-SVN: r102074

libjava/classpath/java/nio/channels/Channels.java

@@ -0,0 +1,143 @@
+/* Channels.java --
+   Copyright (C) 2002, 2003, 2004, 2005  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath 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 2, or (at your option)
+any later version.
+
+GNU Classpath 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 GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package java.nio.channels;
+
+import gnu.java.nio.ChannelReader;
+import gnu.java.nio.InputStreamChannel;
+import gnu.java.nio.OutputStreamChannel;
+
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.Reader;
+import java.io.Writer;
+import java.nio.charset.Charset;
+import java.nio.charset.CharsetDecoder;
+import java.nio.charset.CharsetEncoder;
+
+
+/**
+ * @since 1.4
+ */
+public final class Channels
+{
+  /**
+   * This class isn't intended to be instantiated.
+   */
+  private Channels()
+  {
+    // Do nothing here.
+  }
+
+  /**
+   * Constructs a stream that reads bytes from the given channel.
+   */
+  public static InputStream newInputStream(ReadableByteChannel ch)
+  {
+    return VMChannels.newInputStream(ch);
+  }
+
+  /**
+   * Constructs a stream that writes bytes to the given channel.
+   */
+  public static OutputStream newOutputStream(WritableByteChannel ch)
+  {
+    return VMChannels.newOutputStream(ch);
+  }
+
+  /**
+   * Constructs a channel that reads bytes from the given stream.
+   */
+  public static ReadableByteChannel newChannel(InputStream in)
+  {
+    return new InputStreamChannel(in);
+  }
+
+  /**
+   * Constructs a channel that writes bytes to the given stream.
+   */
+  public static WritableByteChannel newChannel(OutputStream out)
+  {
+    return new OutputStreamChannel(out);
+  }
+
+  /**
+   * Constructs a reader that decodes bytes from the given channel using the
+   * given decoder.
+   */
+  public static Reader newReader(ReadableByteChannel ch, CharsetDecoder dec,
+                                 int minBufferCap)
+  {
+    return new ChannelReader(ch, dec, minBufferCap);
+  }
+
+  /**
+   * Constructs a reader that decodes bytes from the given channel according to
+   * the named charset.
+   *
+   * @exception UnsupportedCharsetException If no support for the named charset
+   * is available in this instance of the Java virtual machine.
+   */
+  public static Reader newReader(ReadableByteChannel ch, String csName)
+  {
+    return newReader(ch, Charset.forName(csName).newDecoder(), -1);
+  }
+
+  /**
+   * Constructs a writer that encodes characters using the given encoder and
+   * writes the resulting bytes to the given channel.
+   */
+  public static Writer newWriter(WritableByteChannel ch, CharsetEncoder enc,
+                                 int minBufferCap)
+  {
+    // FIXME: implement java.nio.channels.Channel.newWriter(WritableByteChannel, CharsetEncoder, int) 
+    throw new Error("not implemented");
+  }
+
+  /**
+   * Constructs a writer that encodes characters according to the named charset
+   * and writes the resulting bytes to the given channel.
+   *
+   * @exception UnsupportedCharsetException If no support for the named charset
+   * is available in this instance of the Java virtual machine.
+   */
+  public static Writer newWriter(WritableByteChannel ch, String csName)
+  {
+    return newWriter(ch, Charset.forName(csName).newEncoder(), -1);
+  }
+}