solr/core/src/java/org/apache/solr/logging/jul/JulInfo.java

/*
 * 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.solr.logging.jul;

import java.util.logging.Level;
import java.util.logging.Logger;

import org.apache.solr.common.util.SuppressForbidden;
import org.apache.solr.logging.LoggerInfo;

@SuppressForbidden(reason = "class is specific to java.util.logging")
public class JulInfo extends LoggerInfo {
  private static final Level[] LEVELS = {
      null, // aka unset
      Level.FINEST,
      Level.FINE,
      Level.CONFIG,
      Level.INFO,
      Level.WARNING,
      Level.SEVERE,
      Level.OFF
      // Level.ALL -- ignore. It is useless.
  };

  final Logger logger;

  public JulInfo(String name, Logger logger) {
    super(name);
    this.logger = logger;
  }

  @Override
  public String getLevel() {
    if(logger==null) {
      return null;
    }
    Level level = logger.getLevel();
    if (level != null) {
      return level.getName();
    }
    for (Level l : LEVELS) {
      if (l == null) {
        // avoid NPE
        continue;
      }
      if (logger.isLoggable(l)) {
        // return first level loggable
        return l.getName();
      }
    }
    return Level.OFF.getName();
  }
  
  @Override
  public boolean isSet() {
    return (logger!=null && logger.getLevel()!=null);
  }
}