Like ByteArrayOutputStream, but writes to a ByteBuffer.
2006-06-28 Casey Marshall <[EMAIL PROTECTED]>
* gnu/java/io/ByteBufferOutputStream.java: new file.
Committed.
### Eclipse Workspace Patch 1.0
#P classpath-ssl-nio
Index: gnu/java/io/ByteBufferOutputStream.java
===================================================================
RCS file: gnu/java/io/ByteBufferOutputStream.java
diff -N gnu/java/io/ByteBufferOutputStream.java
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ gnu/java/io/ByteBufferOutputStream.java 1 Jan 1970 00:00:00 -0000
@@ -0,0 +1,110 @@
+/* ByteBufferOutputStream.java -- out.put stream with a growable underlying
+ byte buffer.
+ Copyright (C) 2006 Free Software Foundation, Inc.
+
+This file is a 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 of the License, 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; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, 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 gnu.java.io;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+import java.nio.ByteBuffer;
+
+/**
+ * An output stream that writes bytes to a ByteBuffer, which will be resized
+ * if more space is needed.
+ *
+ * @author Casey Marshall ([EMAIL PROTECTED])
+ */
+public class ByteBufferOutputStream extends OutputStream
+{
+ private ByteBuffer buffer;
+
+ public ByteBufferOutputStream()
+ {
+ this(256);
+ }
+
+ public ByteBufferOutputStream(int initialCapacity)
+ {
+ buffer = ByteBuffer.allocate(initialCapacity);
+ }
+
+ /* (non-Javadoc)
+ * @see java.io.OutputStream#write(int)
+ */
+ public @Override synchronized void write(int b) throws IOException
+ {
+ if (!buffer.hasRemaining())
+ growBuffer();
+ buffer.put((byte) b);
+ }
+
+ public @Override synchronized void write(byte[] b, int offset, int length)
+ {
+ if (buffer.remaining() < length)
+ growBuffer();
+ buffer.put(b, offset, length);
+ }
+
+ /**
+ * Get the current state of the buffer. The returned buffer will have
+ * its position set to zero, its capacity set to the current limit,
+ * and its limit set to its capacity.
+ *
+ * @return The buffer.
+ */
+ public ByteBuffer buffer()
+ {
+ ByteBuffer buf = buffer.slice();
+ buf.position(0).limit(buf.capacity());
+ return buf;
+ }
+
+ private void growBuffer()
+ {
+ int newCapacity = buffer.capacity();
+ if (newCapacity < 16384) // If the buffer isn't huge yet, double its size
+ newCapacity = newCapacity << 1;
+ else // Otherwize, increment by a bit.
+ newCapacity += 4096;
+ ByteBuffer newBuffer = ByteBuffer.allocate(newCapacity);
+ buffer.flip();
+ newBuffer.put(buffer);
+ buffer = newBuffer;
+ }
+}
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