/*
* $Id$
*
* 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
* 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.jcoderz.commons.logging;
import java.text.Format;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.LogRecord;
import org.jcoderz.commons.Loggable;
/**
* Formats and parses log lines for nested messages.
*
*/
public final class NestedLineFormat
extends ContinuationLineFormat
{
/** The number of fields added to the basic continuation line format.
* The cause field is added.
*/
private static final int NUMBER_OF_ADDITIONAL_PARAMETERS = 1;
private static final int CAUSE_INDEX = NUMBER_OF_PARAMETERS;
/** The fields added to the basic format. No fields are added. */
private static final String ADDITIONAL_LOGLINE_FORMAT_PATTERN
= " Caused by: {" + CAUSE_INDEX + "}";
/**
* Creates a new instance of this and initializes the message format.
*/
public NestedLineFormat ()
{
super(LogLineFormat.NESTED_MESSAGE, ADDITIONAL_LOGLINE_FORMAT_PATTERN,
NUMBER_OF_ADDITIONAL_PARAMETERS);
setFormats(getFormatList(null, true));
}
/**
* Gets the formats as array for formatting a nested 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 Format[] getFormatList (
final DisplayOptions options,
final boolean ignoreOptions)
{
final List formatList = new ArrayList();
formatList.addAll(getBasicFormatList(options, ignoreOptions));
formatList.add(new WhitespaceFormat(new AsItIsFormat("\r\n")));
return (Format[]) formatList.toArray(EMPTY_FORMATTERS);
}
/**
* Formats either a LogRecord or a Loggable as nested message.
* Append a line feed after the data has been formatted into the
* StringBuffer.
*
* @param sb The StringBuffer where to append the formatted data.
* @param record The LogRecord to format, if <code>loggable</code> is not
* null, this is unused and might be null.
* @param loggable The Loggable to format, might be null, but then
* <code>record</code> must not be null.
* @param trackingIdSequence The sequence of contributing tracking ids.
* @param thrown Unused, might be null.
* @param parameter Gives the cause of the message on top of this and is
* the message text to be formatted by this.
*/
public void format (
final StringBuffer sb,
final LogRecord record,
final Loggable loggable,
final List trackingIdSequence,
final Throwable thrown,
final Object parameter)
{
setCause(parameter.toString());
basicFormat(sb, record, loggable, trackingIdSequence);
}
/** {@inheritDoc} */
public void parse (StringBuffer sb, LogFileEntry entry)
throws ParseException
{
try
{
basicParse(sb, entry);
entry.setMessage(getCause());
}
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;
}
}
private void setCause (final String cause)
{
setParameter(CAUSE_INDEX, cause);
}
private String getCause ()
{
return (String) getParameter(CAUSE_INDEX);
}
}