/*
* $Id$
*
* Copyright 2006, The jCoderZ.org Project. 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 jCoderZ.org Project 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 REGENTS 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 REGENTS AND CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.jcoderz.commons.logging;
import java.text.Format;
import java.text.ParseException;
import java.util.List;
import java.util.logging.LogRecord;
import org.jcoderz.commons.Loggable;
/**
* This class formats and parses log lines for instances of type Loggable.
*
*/
public class MessageLineFormat
extends BasicLogLineFormat
{
/** The number of fields added to the basic format.
The text field is added. */
private static final int NUMBER_OF_ADDITIONAL_PARAMETERS = 1;
private static final int TEXT_INDEX = NUMBER_OF_PARAMETERS;
/** The fields added to the basic format. The text field is added. */
private static final String ADDITIONAL_LOGLINE_FORMAT_PATTERN
= " {" + TEXT_INDEX + "}";
private static final String EMPTY_MSG = " ";
/**
* Creates a new instance of this and sets the default line type specifier.
*/
MessageLineFormat ()
{
this(LogLineFormat.LOG_MESSAGE);
}
/**
* Creates a new instance of this and sets the supplied line type specifier.
* This might be used by more specialized sub classes of this.
*
* @param type The line type specifier to set.
*/
protected MessageLineFormat (final LogLineType type)
{
super(type, ADDITIONAL_LOGLINE_FORMAT_PATTERN,
NUMBER_OF_ADDITIONAL_PARAMETERS);
setFormats(getFormatList(null, true));
}
/**
* Gets the formats as array for formatting a log message line.
*
* @param options The display options specifying which fields to display.
* Will be ignored and ,ight be null if <code>ignoreOptions == true</code>.
* @param ignoreOptions flag whether to ignore the supplied options and
* return the formats for all fields.
*
* @return array filled with formats for each selected field. Might be empty
* array, never null.
*/
static final Format[] getFormatList (
final DisplayOptions options,
final boolean ignoreOptions)
{
final List formatList = getBasicFormatList(options, ignoreOptions);
formatList.add(new WhitespaceFormat(new AsItIsFormat("\r\n")));
return (Format[]) formatList.toArray(EMPTY_FORMATTERS);
}
/**
* Formats a Loggable into the supplied StringBuffer. Appends a line feed
* after the data is formatted into the StringBuffer.
*
* @param sb The StringBuffer where to append the formatted Loggable.
* @param record Unused by this, might be null.
* @param loggable The Loggable to format.
* @param trackingIdSequence The list containing the sequence of tracking
* ids contributing to this log message.
* @param thrown Unused by this, might be null.
* @param parameter Unused by this, might be null.
*
* @see LogLineFormat#format(StringBuffer, LogRecord, Loggable, List, Throwable, Object)
*/
public void format (
final StringBuffer sb,
final LogRecord record,
final Loggable loggable,
final List trackingIdSequence,
final Throwable thrown,
final Object parameter)
{
setMessageText(loggable.getMessage());
basicFormat(sb, record, loggable, trackingIdSequence);
}
/**
* Parses a log line, which must be formatted by this, and sets the
* appropriate values of the supplied LogFileEntry.
*
* @param sb The StringBuffer containing the current log line.
* @param entry The LogFileEntry for which to parse the log line.
*
* @throws ParseException if an error occurs parsing <code>sb</code>.
*
* @see org.jcoderz.commons.logging.LogLineFormat#parse(java.lang.StringBuffer, org.jcoderz.commons.logging.LogFileEntry)
*/
public void parse (StringBuffer sb, LogFileEntry entry)
throws ParseException
{
try
{
basicParse(sb, entry);
entry.setMessage(getMessageText());
}
catch (ParseException pex)
{
// just rethrow
throw pex;
}
catch (Exception ex)
{
final ParseException pex = new ParseException(
"Got an error parsing " + sb, 0);
pex.initCause(ex);
throw pex;
}
}
/**
* Sets the message to format. If the supplied string is null or empty, a
* space is set.
*
* @param text The message text.
*/
protected final void setMessageText (final String text)
{
if (text == null || text.length() <= 0)
{
setParameter(TEXT_INDEX, EMPTY_MSG);
}
else
{
setParameter(TEXT_INDEX, text);
}
}
/**
* Gets the message text of a parsed log line.
*
* @return Message text of parsed log line.
*/
protected final String getMessageText ()
{
return (String) getParameter(TEXT_INDEX);
}
}