diff --git a/library/log4php/helpers/LoggerPatternParser.php b/library/log4php/helpers/LoggerPatternParser.php
deleted file mode 100644
--- a/library/log4php/helpers/LoggerPatternParser.php
+++ /dev/null
@@ -1,237 +0,0 @@
-<?php
-/**
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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 log4php
- */
-
-/**
- * Most of the work of the {@link LoggerPatternLayout} class
- * is delegated to the {@link LoggerPatternParser} class.
- *
- * <p>It is this class that parses conversion patterns and creates
- * a chained list of {@link LoggerPatternConverter} converters.</p>
- *
- * @version $Revision: 1395467 $
- * @package log4php
- * @subpackage helpers
- *
- * @since 0.3
- */
-class LoggerPatternParser {
-
- /** Escape character for conversion words in the conversion pattern. */
- const ESCAPE_CHAR = '%';
-
- /** Maps conversion words to relevant converters. */
- private $converterMap;
-
- /** Conversion pattern used in layout. */
- private $pattern;
-
- /** Regex pattern used for parsing the conversion pattern. */
- private $regex;
-
- /**
- * First converter in the chain.
- * @var LoggerPatternConverter
- */
- private $head;
-
- /** Last converter in the chain. */
- private $tail;
-
- public function __construct($pattern, $converterMap) {
- $this->pattern = $pattern;
- $this->converterMap = $converterMap;
-
- // Construct the regex pattern
- $this->regex =
- '/' . // Starting regex pattern delimiter
- self::ESCAPE_CHAR . // Character which marks the start of the conversion pattern
- '(?P<modifiers>[0-9.-]*)' . // Format modifiers (optional)
- '(?P<word>[a-zA-Z]+)' . // The conversion word
- '(?P<option>{[^}]*})?' . // Conversion option in braces (optional)
- '/'; // Ending regex pattern delimiter
- }
-
- /**
- * Parses the conversion pattern string, converts it to a chain of pattern
- * converters and returns the first converter in the chain.
- *
- * @return LoggerPatternConverter
- */
- public function parse() {
-
- // Skip parsing if the pattern is empty
- if (empty($this->pattern)) {
- $this->addLiteral('');
- return $this->head;
- }
-
- // Find all conversion words in the conversion pattern
- $count = preg_match_all($this->regex, $this->pattern, $matches, PREG_OFFSET_CAPTURE);
- if ($count === false) {
- $error = error_get_last();
- throw new LoggerException("Failed parsing layotut pattern: {$error['message']}");
- }
-
- $prevEnd = 0;
-
- foreach ($matches[0] as $key => $item) {
-
- // Locate where the conversion command starts and ends
- $length = strlen($item[0]);
- $start = $item[1];
- $end = $item[1] + $length;
-
- // Find any literal expressions between matched commands
- if ($start > $prevEnd) {
- $literal = substr($this->pattern, $prevEnd, $start - $prevEnd);
- $this->addLiteral($literal);
- }
-
- // Extract the data from the matched command
- $word = !empty($matches['word'][$key]) ? $matches['word'][$key][0] : null;
- $modifiers = !empty($matches['modifiers'][$key]) ? $matches['modifiers'][$key][0] : null;
- $option = !empty($matches['option'][$key]) ? $matches['option'][$key][0] : null;
-
- // Create a converter and add it to the chain
- $this->addConverter($word, $modifiers, $option);
-
- $prevEnd = $end;
- }
-
- // Add any trailing literals
- if ($end < strlen($this->pattern)) {
- $literal = substr($this->pattern, $end);
- $this->addLiteral($literal);
- }
-
- return $this->head;
- }
-
- /**
- * Adds a literal converter to the converter chain.
- * @param string $string The string for the literal converter.
- */
- private function addLiteral($string) {
- $converter = new LoggerPatternConverterLiteral($string);
- $this->addToChain($converter);
- }
-
- /**
- * Adds a non-literal converter to the converter chain.
- *
- * @param string $word The conversion word, used to determine which
- * converter will be used.
- * @param string $modifiers Formatting modifiers.
- * @param string $option Option to pass to the converter.
- */
- private function addConverter($word, $modifiers, $option) {
- $formattingInfo = $this->parseModifiers($modifiers);
- $option = trim($option, "{} ");
-
- if (isset($this->converterMap[$word])) {
- $converter = $this->getConverter($word, $formattingInfo, $option);
- $this->addToChain($converter);
- } else {
- trigger_error("log4php: Invalid keyword '%$word' in converison pattern. Ignoring keyword.", E_USER_WARNING);
- }
- }
-
- /**
- * Determines which converter to use based on the conversion word. Creates
- * an instance of the converter using the provided formatting info and
- * option and returns it.
- *
- * @param string $word The conversion word.
- * @param LoggerFormattingInfo $info Formatting info.
- * @param string $option Converter option.
- *
- * @throws LoggerException
- *
- * @return LoggerPatternConverter
- */
- private function getConverter($word, $info, $option) {
- if (!isset($this->converterMap[$word])) {
- throw new LoggerException("Invalid keyword '%$word' in converison pattern. Ignoring keyword.");
- }
-
- $converterClass = $this->converterMap[$word];
- if (!class_exists($converterClass)) {
- throw new LoggerException("Class '$converterClass' does not exist.");
- }
-
- $converter = new $converterClass($info, $option);
- if (!($converter instanceof LoggerPatternConverter)) {
- throw new LoggerException("Class '$converterClass' is not an instance of LoggerPatternConverter.");
- }
-
- return $converter;
- }
-
- /** Adds a converter to the chain and updates $head and $tail pointers. */
- private function addToChain(LoggerPatternConverter $converter) {
- if (!isset($this->head)) {
- $this->head = $converter;
- $this->tail = $this->head;
- } else {
- $this->tail->next = $converter;
- $this->tail = $this->tail->next;
- }
- }
-
- /**
- * Parses the formatting modifiers and produces the corresponding
- * LoggerFormattingInfo object.
- *
- * @param string $modifier
- * @return LoggerFormattingInfo
- * @throws LoggerException
- */
- private function parseModifiers($modifiers) {
- $info = new LoggerFormattingInfo();
-
- // If no modifiers are given, return default values
- if (empty($modifiers)) {
- return $info;
- }
-
- // Validate
- $pattern = '/^(-?[0-9]+)?\.?-?[0-9]+$/';
- if (!preg_match($pattern, $modifiers)) {
- trigger_error("log4php: Invalid modifier in conversion pattern: [$modifiers]. Ignoring modifier.", E_USER_WARNING);
- return $info;
- }
-
- $parts = explode('.', $modifiers);
-
- if (!empty($parts[0])) {
- $minPart = (integer)$parts[0];
- $info->min = abs($minPart);
- $info->padLeft = ($minPart > 0);
- }
-
- if (!empty($parts[1])) {
- $maxPart = (integer)$parts[1];
- $info->max = abs($maxPart);
- $info->trimLeft = ($maxPart < 0);
- }
-
- return $info;
- }
-}