001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache license, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the license for the specific language governing permissions and 015 * limitations under the license. 016 */ 017package org.apache.logging.log4j.core.util.datetime; 018 019import java.text.FieldPosition; 020import java.text.ParseException; 021import java.text.ParsePosition; 022 023/** 024 * The basic methods for performing date formatting. 025 */ 026public abstract class Format { 027 028 public final String format (final Object obj) { 029 return format(obj, new StringBuilder(), new FieldPosition(0)).toString(); 030 } 031 032 public abstract StringBuilder format(Object obj, StringBuilder toAppendTo, FieldPosition pos); 033 034 public abstract Object parseObject (String source, ParsePosition pos); 035 036 public Object parseObject(final String source) throws ParseException { 037 final ParsePosition pos = new ParsePosition(0); 038 final Object result = parseObject(source, pos); 039 if (pos.getIndex() == 0) { 040 throw new ParseException("Format.parseObject(String) failed", pos.getErrorIndex()); 041 } 042 return result; 043 } 044}