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Initial commit
Functional, without SSO
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186
sources/lib/Log4php/renderers/LoggerRendererMap.php
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186
sources/lib/Log4php/renderers/LoggerRendererMap.php
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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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* Manages defined renderers and determines which renderer to use for a given
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* input.
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*
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* @version $Revision: 1394956 $
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* @package log4php
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* @subpackage renderers
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* @since 0.3
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*/
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class LoggerRendererMap {
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/**
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* Maps class names to appropriate renderers.
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* @var array
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*/
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private $map = array();
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/**
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* The default renderer to use if no specific renderer is found.
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* @var LoggerRenderer
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*/
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private $defaultRenderer;
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public function __construct() {
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// Set default config
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$this->reset();
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}
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/**
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* Adds a renderer to the map.
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*
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* If a renderer already exists for the given <var>$renderedClass</var> it
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* will be overwritten without warning.
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*
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* @param string $renderedClass The name of the class which will be
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* rendered by the renderer.
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* @param string $renderingClass The name of the class which will
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* perform the rendering.
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*/
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public function addRenderer($renderedClass, $renderingClass) {
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// Check the rendering class exists
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if (!class_exists($renderingClass)) {
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trigger_error("log4php: Failed adding renderer. Rendering class [$renderingClass] not found.");
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return;
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}
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// Create the instance
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$renderer = new $renderingClass();
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// Check the class implements the right interface
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if (!($renderer instanceof LoggerRenderer)) {
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trigger_error("log4php: Failed adding renderer. Rendering class [$renderingClass] does not implement the LoggerRenderer interface.");
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return;
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}
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// Convert to lowercase since class names in PHP are not case sensitive
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$renderedClass = strtolower($renderedClass);
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$this->map[$renderedClass] = $renderer;
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}
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/**
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* Sets a custom default renderer class.
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*
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* TODO: there's code duplication here. This method is almost identical to
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* addRenderer(). However, it has custom error messages so let it sit for
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* now.
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*
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* @param string $renderingClass The name of the class which will
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* perform the rendering.
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*/
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public function setDefaultRenderer($renderingClass) {
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// Check the class exists
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if (!class_exists($renderingClass)) {
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trigger_error("log4php: Failed setting default renderer. Rendering class [$renderingClass] not found.");
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return;
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}
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// Create the instance
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$renderer = new $renderingClass();
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// Check the class implements the right interface
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if (!($renderer instanceof LoggerRenderer)) {
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trigger_error("log4php: Failed setting default renderer. Rendering class [$renderingClass] does not implement the LoggerRenderer interface.");
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return;
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}
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$this->defaultRenderer = $renderer;
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}
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/**
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* Returns the default renderer.
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* @var LoggerRenderer
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*/
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public function getDefaultRenderer() {
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return $this->defaultRenderer;
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}
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/**
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* Finds the appropriate renderer for the given <var>input</var>, and
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* renders it (i.e. converts it to a string).
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*
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* @param mixed $input Input to render.
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* @return string The rendered contents.
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*/
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public function findAndRender($input) {
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if ($input === null) {
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return null;
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}
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// For objects, try to find a renderer in the map
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if(is_object($input)) {
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$renderer = $this->getByClassName(get_class($input));
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if (isset($renderer)) {
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return $renderer->render($input);
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}
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}
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// Fall back to the default renderer
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return $this->defaultRenderer->render($input);
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}
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/**
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* Returns the appropriate renderer for a given object.
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*
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* @param mixed $object
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* @return LoggerRenderer Or null if none found.
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*/
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public function getByObject($object) {
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if (!is_object($object)) {
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return null;
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}
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return $this->getByClassName(get_class($object));
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}
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/**
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* Returns the appropriate renderer for a given class name.
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*
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* If no renderer could be found, returns NULL.
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*
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* @param string $class
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* @return LoggerRendererObject Or null if not found.
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*/
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public function getByClassName($class) {
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for(; !empty($class); $class = get_parent_class($class)) {
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$class = strtolower($class);
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if(isset($this->map[$class])) {
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return $this->map[$class];
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}
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}
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return null;
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}
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/** Empties the renderer map. */
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public function clear() {
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$this->map = array();
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}
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/** Resets the renderer map to it's default configuration. */
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public function reset() {
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$this->defaultRenderer = new LoggerRendererDefault();
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$this->clear();
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$this->addRenderer('Exception', 'LoggerRendererException');
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}
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}
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