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+++ b/library/log4php/filters/LoggerFilterLevelMatch.php
@@ -0,0 +1,100 @@
+<?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
+ */
+
+/**
+ * This is a very simple filter based on level matching.
+ *
+ * <p>The filter admits two options <b><var>LevelToMatch</var></b> and
+ * <b><var>AcceptOnMatch</var></b>. If there is an exact match between the value
+ * of the <b><var>LevelToMatch</var></b> option and the level of the
+ * {@link LoggerLoggingEvent}, then the {@link decide()} method returns
+ * {@link LoggerFilter::ACCEPT} in case the <b><var>AcceptOnMatch</var></b>
+ * option value is set to <i>true</i>, if it is <i>false</i> then
+ * {@link LoggerFilter::DENY} is returned. If there is no match,
+ * {@link LoggerFilter::NEUTRAL} is returned.</p>
+ *
+ * <p>
+ * An example for this filter:
+ *
+ * {@example ../../examples/php/filter_levelmatch.php 19}
+ *
+ * <p>
+ * The corresponding XML file:
+ *
+ * {@example ../../examples/resources/filter_levelmatch.xml 18}
+ *
+ * @version $Revision: 1213283 $
+ * @package log4php
+ * @subpackage filters
+ * @since 0.6
+ */
+class LoggerFilterLevelMatch extends LoggerFilter {
+
+    /**
+     * Indicates if this event should be accepted or denied on match
+     * @var boolean
+     */
+    protected $acceptOnMatch = true;
+
+    /**
+     * The level, when to match
+     * @var LoggerLevel
+     */
+    protected $levelToMatch;
+
+    /**
+     * @param boolean $acceptOnMatch
+     */
+    public function setAcceptOnMatch($acceptOnMatch) {
+        $this->setBoolean('acceptOnMatch', $acceptOnMatch);
+    }
+
+    /**
+     * @param string $l the level to match
+     */
+    public function setLevelToMatch($level) {
+        $this->setLevel('levelToMatch', $level);
+    }
+
+    /**
+     * Return the decision of this filter.
+     *
+     * Returns {@link LoggerFilter::NEUTRAL} if the <b><var>LevelToMatch</var></b>
+     * option is not set or if there is not match.    Otherwise, if there is a
+     * match, then the returned decision is {@link LoggerFilter::ACCEPT} if the
+     * <b><var>AcceptOnMatch</var></b> property is set to <i>true</i>. The
+     * returned decision is {@link LoggerFilter::DENY} if the
+     * <b><var>AcceptOnMatch</var></b> property is set to <i>false</i>.
+     *
+     * @param LoggerLoggingEvent $event
+     * @return integer
+     */
+    public function decide(LoggerLoggingEvent $event) {
+        if ($this->levelToMatch === null) {
+            return LoggerFilter::NEUTRAL;
+        }
+
+        if ($this->levelToMatch->equals($event->getLevel())) {
+            return $this->acceptOnMatch ? LoggerFilter::ACCEPT : LoggerFilter::DENY;
+        } else {
+            return LoggerFilter::NEUTRAL;
+        }
+    }
+}