JAL-3026 srcjar files for VARNA and log4j

[jalview.git] / srcjar / org / apache / log4j / varia / LevelMatchFilter.java

diff --git a/srcjar/org/apache/log4j/varia/LevelMatchFilter.java b/srcjar/org/apache/log4j/varia/LevelMatchFilter.java
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+/*
+ * 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 org.apache.log4j.varia;
+
+import org.apache.log4j.Level;
+import org.apache.log4j.spi.Filter;
+import org.apache.log4j.spi.LoggingEvent;
+import org.apache.log4j.helpers.OptionConverter;
+
+/**
+   This is a very simple filter based on level matching.
+
+   <p>The filter admits two options <b>LevelToMatch</b> and
+   <b>AcceptOnMatch</b>. If there is an exact match between the value
+   of the <b>LevelToMatch</b> option and the level of the {@link
+   LoggingEvent}, then the {@link #decide} method returns {@link
+   Filter#ACCEPT} in case the <b>AcceptOnMatch</b> option value is set
+   to <code>true</code>, if it is <code>false</code> then {@link
+   Filter#DENY} is returned. If there is no match, {@link
+   Filter#NEUTRAL} is returned.
+
+   @author Ceki G&uuml;lc&uuml;
+
+   @since 1.2 */
+public class LevelMatchFilter extends Filter {
+  
+  /**
+     Do we return ACCEPT when a match occurs. Default is
+     <code>true</code>.  */
+  boolean acceptOnMatch = true;
+
+  /**
+   */
+  Level levelToMatch;
+
+ 
+  public
+  void setLevelToMatch(String level) {
+    levelToMatch = OptionConverter.toLevel(level, null);
+  }
+  
+  public
+  String getLevelToMatch() {
+    return levelToMatch == null ? null : levelToMatch.toString();
+  }
+  
+  public
+  void setAcceptOnMatch(boolean acceptOnMatch) {
+    this.acceptOnMatch = acceptOnMatch;
+  }
+  
+  public
+  boolean getAcceptOnMatch() {
+    return acceptOnMatch;
+  }
+  
+
+  /**
+     Return the decision of this filter.
+
+     Returns {@link Filter#NEUTRAL} if the <b>LevelToMatch</b> option
+     is not set or if there is not match.  Otherwise, if there is a
+     match, then the returned decision is {@link Filter#ACCEPT} if the
+     <b>AcceptOnMatch</b> property is set to <code>true</code>. The
+     returned decision is {@link Filter#DENY} if the
+     <b>AcceptOnMatch</b> property is set to false.
+
+  */
+  public
+  int decide(LoggingEvent event) {
+    if(this.levelToMatch == null) {
+      return Filter.NEUTRAL;
+    }
+    
+    boolean matchOccured = false;
+    if(this.levelToMatch.equals(event.getLevel())) {
+      matchOccured = true;
+    } 
+
+    if(matchOccured) {  
+      if(this.acceptOnMatch) {
+        return Filter.ACCEPT;
+    } else {
+        return Filter.DENY;
+    }
+    } else {
+      return Filter.NEUTRAL;
+    }
+  }
+}