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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.Marker;
23  import org.apache.logging.log4j.MarkerManager;
24  
25  /**
26   * A JPA 2.1 attribute converter for {@link Marker}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 MarkerAttributeConverter implements AttributeConverter<Marker, String> {
31      @Override
32      public String convertToDatabaseColumn(final Marker marker) {
33          StringBuilder builder = new StringBuilder(marker.getName());
34          Marker parent = marker.getParent();
35          int levels = 0;
36          boolean hasParent = false;
37          while (parent != null) {
38              levels++;
39              hasParent = true;
40              builder.append("[ ").append(parent.getName());
41              parent = parent.getParent();
42          }
43          for (int i = 0; i < levels; i++) {
44              builder.append(" ]");
45          }
46          if (hasParent) {
47              builder.append(" ]");
48          }
49          return builder.toString();
50      }
51  
52      @Override
53      public Marker convertToEntityAttribute(final String s) {
54          int bracket = s.indexOf("[");
55  
56          return bracket < 1 ? MarkerManager.getMarker(s) : MarkerManager.getMarker(s.substring(0, bracket));
57      }
58  }