library/log4php/helpers/LoggerUtils.php
author Markus Bröker <broeker.markus@googlemail.com>
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Projekt umbenannt zu BFW_APP
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<?php
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/**
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 * Licensed to the Apache Software Foundation (ASF) under one or more
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 * contributor license agreements. See the NOTICE file distributed with
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 * this work for additional information regarding copyright ownership.
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 * The ASF licenses this file to You under the Apache License, Version 2.0
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 * (the "License"); you may not use this file except in compliance with
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 * the License. You may obtain a copy of the License at
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 *
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 *       http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 *
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 * @package log4php
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 */
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/**
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 * Contains various helper methods.
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 *
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 * @package log4php
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 * @subpackage helpers
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 * @since 2.3
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 */
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class LoggerUtils {
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    /**
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     * Splits a fully qualified class name into fragments delimited by the
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     * namespace separator (\).
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     *
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     * For backward compatibility, a dot (.) can be used as a delimiter as
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     * well.
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     *
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     * @param string $name
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     *
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     * @return array Class name split into fragments.
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     */
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    public static function tokenizeClassName($name) {
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        $name = str_replace('.', '\\', $name);
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        $name = trim($name, ' \\');
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        $fragments = explode('\\', $name);
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        foreach ($fragments as $key => $fragment) {
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            if (trim($fragment) === '') {
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                unset($fragments[$key]);
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            }
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        }
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        return $fragments;
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    }
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    /**
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     * Attempts to shorten the given class name to the desired length.
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     *
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     * This is done by separating the class name into fragments (delimited
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     * by \ or .) and trimming individual fragments, starting with the left,
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     * until desired length has been reached.
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     *
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     * The final fragment (i.e. class name) will never be shortened so the
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     * result may still be longer than given length.
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     *
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     * @param string $name The (qualified) class name.
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     * @param integer $length The length to shorten to. If null or 0 is given,
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     * the name will be returned without shortening.
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     */
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    public static function shortenClassName($name, $length) {
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        if ($length === null || $length < 0) {
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            return $name;
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        }
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        $name = str_replace('.', '\\', $name);
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        $name = trim($name, ' \\');
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        // Check if any shortening is required
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        $currentLength = strlen($name);
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        if ($currentLength <= $length) {
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            return $name;
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        }
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        // Split name into fragments
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        $fragments = explode('\\', $name);
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        // If zero length is specified, return only last fragment
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        if ($length == 0) {
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            return array_pop($fragments);
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        }
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        // If the name splits to only one fragment, then it cannot be shortened
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        $count = count($fragments);
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        if ($count == 1) {
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            return $name;
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        }
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        foreach ($fragments as $key => &$fragment) {
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            // Never shorten last fragment
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            if ($key == $count - 1) {
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                break;
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            }
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            // Check for empty fragments (shouldn't happen but it's possible)
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            $fragLen = strlen($fragment);
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            if ($fragLen <= 1) {
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                continue;
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            }
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            // Shorten fragment to one character and check if total length satisfactory
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            $fragment = substr($fragment, 0, 1);
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            $currentLength = $currentLength - $fragLen + 1;
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            if ($currentLength <= $length) {
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                break;
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            }
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        }
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        unset($fragment);
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        return implode('\\', $fragments);
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    }
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}
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