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.util.datetime;
18
19 import java.text.FieldPosition;
20 import java.text.ParseException;
21 import java.text.ParsePosition;
22
23 /**
24 * The basic methods for performing date formatting.
25 */
26 public abstract class Format {
27
28 public final String format (final Object obj) {
29 return format(obj, new StringBuilder(), new FieldPosition(0)).toString();
30 }
31
32 public abstract StringBuilder format(Object obj, StringBuilder toAppendTo, FieldPosition pos);
33
34 public abstract Object parseObject (String source, ParsePosition pos);
35
36 public Object parseObject(final String source) throws ParseException {
37 final ParsePosition pos = new ParsePosition(0);
38 final Object result = parseObject(source, pos);
39 if (pos.getIndex() == 0) {
40 throw new ParseException("Format.parseObject(String) failed", pos.getErrorIndex());
41 }
42 return result;
43 }
44 }