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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.config;
18  
19  import org.apache.logging.log4j.core.config.plugins.Plugin;
20  
21  /**
22   *
23   */
24  @Plugin(name = "JSONConfigurationFactory", category = "ConfigurationFactory")
25  @Order(6)
26  public class JSONConfigurationFactory extends ConfigurationFactory {
27  
28      /**
29       * The file extensions supported by this factory.
30       */
31      public static final String[] SUFFIXES = new String[] {".json", ".jsn"};
32  
33      private static String[] dependencies = new String[] {
34              "com.fasterxml.jackson.databind.ObjectMapper",
35              "com.fasterxml.jackson.databind.JsonNode",
36              "com.fasterxml.jackson.core.JsonParser"
37      };
38  
39      private boolean isActive;
40  
41      public JSONConfigurationFactory() {
42          try {
43              for (final String item : dependencies) {
44                  Class.forName(item);
45              }
46          } catch (final ClassNotFoundException ex) {
47              LOGGER.debug("Missing dependencies for Json support");
48              isActive = false;
49              return;
50          }
51          isActive = true;
52      }
53  
54      @Override
55      protected boolean isActive() {
56          return isActive;
57      }
58  
59      @Override
60      public Configuration getConfiguration(final ConfigurationSource source) {
61          if (!isActive) {
62              return null;
63          }
64          return new JSONConfiguration(source);
65      }
66  
67      @Override
68      public String[] getSupportedTypes() {
69          return SUFFIXES;
70      }
71  }