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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements. See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache license, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License. You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the license for the specific language governing permissions and
    15   * limitations under the license.
    16   */
    17  package org.apache.logging.log4j.core.appender.db.jpa.converter;
    18
    19  import javax.persistence.AttributeConverter;
    20  import javax.persistence.Converter;
    21
    22  import org.apache.logging.log4j.Level;
    23  import org.apache.logging.log4j.util.Strings;
    24
    25  /**
    26   * A JPA 2.1 attribute converter for {@link org.apache.logging.log4j.Level}s in {@link org.apache.logging.log4j.core.LogEvent}s. This
    27   * converter is capable of converting both to and from {@link String}s.
    28   */
    29  @Converter(autoApply = false)
    30  public class LevelAttributeConverter implements AttributeConverter<Level, String> {
    31      @Override
    32      public String convertToDatabaseColumn(final Level level) {
    33          if (level == null) {
    34              return null;
    35          }
    36          return level.name();
    37      }
    38
    39      @Override
    40      public Level convertToEntityAttribute(final String s) {
    41          if (Strings.isEmpty(s)) {
    42              return null;
    43          }
    44
    45          return Level.toLevel(s, null);
    46      }
    47  }