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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.pattern;
18  
19  import java.util.Date;
20  
21  import org.apache.logging.log4j.core.config.plugins.Plugin;
22  
23  
24  /**
25   * Formats an integer.
26   */
27  @Plugin(name = "IntegerPatternConverter", category = "FileConverter")
28  @ConverterKeys({"i", "index" })
29  public final class IntegerPatternConverter extends AbstractPatternConverter implements ArrayPatternConverter {
30      
31      /**
32       * Singleton.
33       */
34      private static final IntegerPatternConverter INSTANCE = new IntegerPatternConverter();
35  
36      /**
37       * Private constructor.
38       */
39      private IntegerPatternConverter() {
40          super("Integer", "integer");
41      }
42  
43      /**
44       * Obtains an instance of pattern converter.
45       *
46       * @param options options, may be null.
47       * @return instance of pattern converter.
48       */
49      public static IntegerPatternConverter newInstance(
50          final String[] options) {
51          return INSTANCE;
52      }
53  
54      @Override
55      public void format(final StringBuilder toAppendTo, final Object... objects) {
56          for (final Object obj : objects) {
57              if (obj instanceof Integer) {
58                  format(obj, toAppendTo);
59                  break;
60              }
61          }
62      }
63  
64      /**
65       * {@inheritDoc}
66       */
67      @Override
68      public void format(final Object obj, final StringBuilder toAppendTo) {
69          if (obj instanceof Integer) {
70              toAppendTo.append(obj.toString());
71          } else if (obj instanceof Date) {
72              toAppendTo.append(Long.toString(((Date) obj).getTime()));
73          }
74      }
75  }