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Diffstat (limited to 'org.eclipse.jgit/src/org/eclipse/jgit/util/io/MessageWriter.java')
| -rw-r--r-- | org.eclipse.jgit/src/org/eclipse/jgit/util/io/MessageWriter.java | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/util/io/MessageWriter.java b/org.eclipse.jgit/src/org/eclipse/jgit/util/io/MessageWriter.java new file mode 100644 index 0000000000..22c3ce94ed --- /dev/null +++ b/org.eclipse.jgit/src/org/eclipse/jgit/util/io/MessageWriter.java @@ -0,0 +1,115 @@ +/* + * Copyright (C) 2009-2010, Google Inc. + * and other copyright owners as documented in the project's IP log. + * + * This program and the accompanying materials are made available + * under the terms of the Eclipse Distribution License v1.0 which + * accompanies this distribution, is reproduced below, and is + * available at http://www.eclipse.org/org/documents/edl-v10.php + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * - Neither the name of the Eclipse Foundation, Inc. nor the + * names of its contributors may be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND + * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +package org.eclipse.jgit.util.io; + +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.io.OutputStream; +import java.io.OutputStreamWriter; +import java.io.Writer; + +import org.eclipse.jgit.lib.Constants; +import org.eclipse.jgit.transport.BaseConnection; +import org.eclipse.jgit.util.RawParseUtils; + +/** + * Combines messages from an OutputStream (hopefully in UTF-8) and a Writer. + * <p> + * This class is primarily meant for {@link BaseConnection} in contexts where a + * standard error stream from a command execution, as well as messages from a + * side-band channel, need to be combined together into a buffer to represent + * the complete set of messages from a remote repository. + * <p> + * Writes made to the writer are re-encoded as UTF-8 and interleaved into the + * buffer that {@link #getRawStream()} also writes to. + * <p> + * {@link #toString()} returns all written data, after converting it to a String + * under the assumption of UTF-8 encoding. + * <p> + * Internally {@link RawParseUtils#decode(byte[])} is used by {@code toString()} + * tries to work out a reasonably correct character set for the raw data. + */ +public class MessageWriter extends Writer { + private final ByteArrayOutputStream buf; + + private final OutputStreamWriter enc; + + /** Create an empty writer. */ + public MessageWriter() { + buf = new ByteArrayOutputStream(); + enc = new OutputStreamWriter(getRawStream(), Constants.CHARSET); + } + + @Override + public void write(char[] cbuf, int off, int len) throws IOException { + synchronized (buf) { + enc.write(cbuf, off, len); + enc.flush(); + } + } + + /** + * @return the underlying byte stream that character writes to this writer + * drop into. Writes to this stream should should be in UTF-8. + */ + public OutputStream getRawStream() { + return buf; + } + + @Override + public void close() throws IOException { + // Do nothing, we are buffered with no resources. + } + + @Override + public void flush() throws IOException { + // Do nothing, we are buffered with no resources. + } + + /** @return string version of all buffered data. */ + @Override + public String toString() { + return RawParseUtils.decode(buf.toByteArray()); + } +} |