JavaMail 1.6.2 Source Code Files

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com/sun/mail/util/TraceOutputStream.java

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2017 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://oss.oracle.com/licenses/CDDL+GPL-1.1
 * or LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.mail.util;

import java.io.*;
import java.util.logging.Level;

/**
 * This class is a subclass of DataOutputStream that copies the
 * data being written into the DataOutputStream into another output
 * stream. This class is used here to provide a debug trace of the
 * stuff thats being written out into the DataOutputStream.
 *
 * @author John Mani
 */

public class TraceOutputStream extends FilterOutputStream {
    private boolean trace = false;
    private boolean quote = false;
    private OutputStream traceOut;

    /**
     * Creates an output stream filter built on top of the specified
     * underlying output stream.
     *
     * @param   out   the underlying output stream.
     * @param	logger	log trace here
     */
    public TraceOutputStream(OutputStream out, MailLogger logger) {
	super(out);
	this.trace = logger.isLoggable(Level.FINEST);
	this.traceOut = new LogOutputStream(logger);;
    }

    /**
     * Creates an output stream filter built on top of the specified
     * underlying output stream.
     *
     * @param   out   the underlying output stream.
     * @param	traceOut	the trace stream.
     */
    public TraceOutputStream(OutputStream out, OutputStream traceOut) {
	super(out);
	this.traceOut = traceOut;
    }

    /**
     * Set the trace mode.
     *
     * @param	trace	the trace mode
     */
    public void setTrace(boolean trace) {
	this.trace = trace;
    }

    /**
     * Set quote mode.
     * @param	quote	the quote mode
     */
    public void setQuote(boolean quote) {
	this.quote = quote;
    }

    /**
     * Writes the specified <code>byte</code> to this output stream.
     * Writes out the byte into the trace stream if the trace mode
     * is <code>true</code>
     *
     * @param	b	the byte to write
     * @exception	IOException	for I/O errors
     */
    @Override
    public void write(int b) throws IOException {
	if (trace) {
	    if (quote)
		writeByte(b);
	    else
		traceOut.write(b);
	}
	out.write(b);
    }
	    
    /**
     * Writes <code>b.length</code> bytes to this output stream.
     * Writes out the bytes into the trace stream if the trace
     * mode is <code>true</code>
     *
     * @param	b	bytes to write
     * @param	off	offset in array
     * @param	len	number of bytes to write
     * @exception	IOException	for I/O errors
     */
    @Override
    public void write(byte b[], int off, int len) throws IOException {
	if (trace) {
	    if (quote) {
		for (int i = 0; i < len; i++)
		    writeByte(b[off + i]);
	    } else
		traceOut.write(b, off, len);
	}
	out.write(b, off, len);
    }

    /**
     * Write a byte in a way that every byte value is printable ASCII.
     */
    private final void writeByte(int b) throws IOException {
	b &= 0xff;
	if (b > 0x7f) {
	    traceOut.write('M');
	    traceOut.write('-');
	    b &= 0x7f;
	}
	if (b == '\r') {
	    traceOut.write('\\');
	    traceOut.write('r');
	} else if (b == '\n') {
	    traceOut.write('\\');
	    traceOut.write('n');
	    traceOut.write('\n');
	} else if (b == '\t') {
	    traceOut.write('\\');
	    traceOut.write('t');
	} else if (b < ' ') {
	    traceOut.write('^');
	    traceOut.write('@' + b);
	} else {
	    traceOut.write(b);
	}
    }
}

com/sun/mail/util/TraceOutputStream.java

 

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Release date: 2018-08-29
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