diff options
| author | Joe Robinson <joe@lc8n.com> | 2010-10-27 14:21:09 +0100 |
|---|---|---|
| committer | Joe Robinson <joe@lc8n.com> | 2010-10-27 14:21:09 +0100 |
| commit | 063284837c8c366e5502b1b0264b8eb807b61732 (patch) | |
| tree | fff3a1e1e5afaa671485b9d990704658276627ac /src/org/apache/commons/net/io/FromNetASCIIOutputStream.java | |
Basic upload functionality to predifined location, with basic file browser
Diffstat (limited to 'src/org/apache/commons/net/io/FromNetASCIIOutputStream.java')
| -rw-r--r-- | src/org/apache/commons/net/io/FromNetASCIIOutputStream.java | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/src/org/apache/commons/net/io/FromNetASCIIOutputStream.java b/src/org/apache/commons/net/io/FromNetASCIIOutputStream.java new file mode 100644 index 0000000..c025a1b --- /dev/null +++ b/src/org/apache/commons/net/io/FromNetASCIIOutputStream.java @@ -0,0 +1,174 @@ +/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.net.io;
+
+import java.io.FilterOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+/***
+ * This class wraps an output stream, replacing all occurrences
+ * of <CR><LF> (carriage return followed by a linefeed),
+ * which is the NETASCII standard for representing a newline, with the
+ * local line separator representation. You would use this class to
+ * implement ASCII file transfers requiring conversion from NETASCII.
+ * <p>
+ * Because of the translation process, a call to <code>flush()</code> will
+ * not flush the last byte written if that byte was a carriage
+ * return. A call to {@link #close close() }, however, will
+ * flush the carriage return.
+ * <p>
+ * <p>
+ * @author Daniel F. Savarese
+ ***/
+
+public final class FromNetASCIIOutputStream extends FilterOutputStream
+{
+ private boolean __lastWasCR;
+
+ /***
+ * Creates a FromNetASCIIOutputStream instance that wraps an existing
+ * OutputStream.
+ * <p>
+ * @param output The OutputStream to wrap.
+ ***/
+ public FromNetASCIIOutputStream(OutputStream output)
+ {
+ super(output);
+ __lastWasCR = false;
+ }
+
+
+ private void __write(int ch) throws IOException
+ {
+ switch (ch)
+ {
+ case '\r':
+ __lastWasCR = true;
+ // Don't write anything. We need to see if next one is linefeed
+ break;
+ case '\n':
+ if (__lastWasCR)
+ {
+ out.write(FromNetASCIIInputStream._lineSeparatorBytes);
+ __lastWasCR = false;
+ break;
+ }
+ __lastWasCR = false;
+ out.write('\n');
+ break;
+ default:
+ if (__lastWasCR)
+ {
+ out.write('\r');
+ __lastWasCR = false;
+ }
+ out.write(ch);
+ break;
+ }
+ }
+
+
+ /***
+ * Writes a byte to the stream. Note that a call to this method
+ * might not actually write a byte to the underlying stream until a
+ * subsequent character is written, from which it can be determined if
+ * a NETASCII line separator was encountered.
+ * This is transparent to the programmer and is only mentioned for
+ * completeness.
+ * <p>
+ * @param ch The byte to write.
+ * @exception IOException If an error occurs while writing to the underlying
+ * stream.
+ ***/
+ @Override
+ public synchronized void write(int ch)
+ throws IOException
+ {
+ if (FromNetASCIIInputStream._noConversionRequired)
+ {
+ out.write(ch);
+ return ;
+ }
+
+ __write(ch);
+ }
+
+
+ /***
+ * Writes a byte array to the stream.
+ * <p>
+ * @param buffer The byte array to write.
+ * @exception IOException If an error occurs while writing to the underlying
+ * stream.
+ ***/
+ @Override
+ public synchronized void write(byte buffer[])
+ throws IOException
+ {
+ write(buffer, 0, buffer.length);
+ }
+
+
+ /***
+ * Writes a number of bytes from a byte array to the stream starting from
+ * a given offset.
+ * <p>
+ * @param buffer The byte array to write.
+ * @param offset The offset into the array at which to start copying data.
+ * @param length The number of bytes to write.
+ * @exception IOException If an error occurs while writing to the underlying
+ * stream.
+ ***/
+ @Override
+ public synchronized void write(byte buffer[], int offset, int length)
+ throws IOException
+ {
+ if (FromNetASCIIInputStream._noConversionRequired)
+ {
+ // FilterOutputStream method is very slow.
+ //super.write(buffer, offset, length);
+ out.write(buffer, offset, length);
+ return ;
+ }
+
+ while (length-- > 0)
+ __write(buffer[offset++]);
+ }
+
+
+ /***
+ * Closes the stream, writing all pending data.
+ * <p>
+ * @exception IOException If an error occurs while closing the stream.
+ ***/
+ @Override
+ public synchronized void close()
+ throws IOException
+ {
+ if (FromNetASCIIInputStream._noConversionRequired)
+ {
+ super.close();
+ return ;
+ }
+
+ if (__lastWasCR)
+ out.write('\r');
+ super.close();
+ }
+}
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