tweak log4php file:line column to optionally ignore log4php wrappers and optionally shorten file path

src/main/php/LoggerLoggingEvent.php

@@ -145,14 +145,35 @@ public function __construct($fqcn, $logger, LoggerLevel $level, $message, $timeS
 	 public function getFullQualifiedClassname() {
 		 return $this->fqcn;
 	 }
-
+
+	private static $ignoreFileRegex;
+	private static $ignorePathRegexSrc = "//";
+	private static $ignorePathRegexDst = "";
+
+	/**
+	 * Set filter for use by getLocationInformation() to ignore log4php caller wrapper functions.
+	 */
+	public static function setIgnoreFileRegex($regex) {
+		self::$ignoreFileRegex = $regex; // e.g. '/\/(my-log4php-wrapper.php|myOtherLog4PhpWrapper.php)$/'
+	}
+
+	/**
+	 * Set filter for use by getLocationInformation() to ignore a common file prefix, or ignore entire path.
+	 */
+	public static function setIgnorePathRegex($regexSrc, $regexDst = "") {
+		self::$ignorePathRegexSrc = $regexSrc; // e.g. '/^.*\/(ignore everything before this folder\/)/' or ignore entire path '/^.*\/([^\/]+)/'
+		self::$ignorePathRegexDst = $regexDst; // e.g. '' or '$1'
+	}
+
 	/**
 	 * Set the location information for this logging event. The collected
 	 * information is cached for future use.
 	 *
 	 * <p>This method uses {@link PHP_MANUAL#debug_backtrace debug_backtrace()} function (if exists)
 	 * to collect informations about caller.</p>
 	 * <p>It only recognize informations generated by {@link Logger} and its subclasses.</p>
+	 * <p>Use setIgnoreFileRegex() to skip file(s) of caller using own log4php wrapper class/function.</p>
+	 * <p>Use setIgnorePathRegex() to shorten reported file path by removing a common prefix.</p>
 	 * @return LoggerLocationInfo
 	 */
 	public function getLocationInformation() {
@@ -165,12 +186,21 @@ public function getLocationInformation() {
 			$hop = array_pop($trace);
 			while($hop !== null) {
 				if(isset($hop['class'])) {
+					// Note: This next if() statement inspired by the following stackoverflow question:
+					// http://stackoverflow.com/questions/15219327/php-log4php-dynamically-set-fileline-column
+					if (isset($hop['file']) and isset(self::$ignoreFileRegex)) {
+						if(1 === preg_match(self::$ignoreFileRegex, $hop['file'])) {
+							// come here if detected a caller wrapper for log4php
+							$locationInfo['line'] =                                                                    $prevHop['line'] ;
+							$locationInfo['file'] = preg_replace(self::$ignorePathRegexSrc, self::$ignorePathRegexDst, $prevHop['file']); // replace annoyingly verbose path prefix
+							break;
+						}
+					}
 					// we are sometimes in functions = no class available: avoid php warning here
 					$className = strtolower($hop['class']);
-					if(!empty($className) and ($className == 'logger' or 
-						strtolower(get_parent_class($className)) == 'logger')) {
-						$locationInfo['line'] = $hop['line'];
-						$locationInfo['file'] = $hop['file'];
+					if(!empty($className) and ($className == 'logger' or strtolower(get_parent_class($className)) == 'logger')) {
+						$locationInfo['line'] =                                                                    $hop['line'] ;
+						$locationInfo['file'] = preg_replace(self::$ignorePathRegexSrc, self::$ignorePathRegexDst, $hop['file']); // replace annoyingly verbose path prefix
 						break;
 					}
 				}