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/*
* Copyright 2003-2004 Apache Software Foundation
*
* Licensed 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.tools.ant.taskdefs.optional.perforce;
import java.io.OutputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
/**
* heavily inspired from LogOutputStream
* this stream class calls back the P4Handler on each line of stdout or stderr read
* @author : <a href="mailto:levylambert@tiscali-dsl.de">Antoine Levy-Lambert</a>
*/
public class P4OutputStream extends OutputStream {
private P4Handler handler;
private ByteArrayOutputStream buffer = new ByteArrayOutputStream();
private boolean skip = false;
/**
* creates a new P4OutputStream for a P4Handler
* @param handler the handler which will process the streams
*/
public P4OutputStream(P4Handler handler) {
this.handler = handler;
}
/**
* Write the data to the buffer and flush the buffer, if a line
* separator is detected.
*
* @param cc data to log (byte).
* @throws IOException IOException if an I/O error occurs. In particular,
* an <code>IOException</code> may be thrown if the
* output stream has been closed.
*/
public void write(int cc) throws IOException {
final byte c = (byte) cc;
if ((c == '\n') || (c == '\r')) {
if (!skip) {
processBuffer();
}
} else {
buffer.write(cc);
}
skip = (c == '\r');
}
/**
* Converts the buffer to a string and sends it to <code>processLine</code>
*/
protected void processBuffer() {
handler.process(buffer.toString());
buffer.reset();
}
/**
* Writes all remaining
* @throws IOException if an I/O error occurs.
*/
public void close() throws IOException {
if (buffer.size() > 0) {
processBuffer();
}
super.close();
}
}
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