| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.tamaya.types.internal.converters; |
| |
| import org.apache.tamaya.types.spi.ConversionContext; |
| import org.apache.tamaya.types.spi.PropertyConverter; |
| |
| import java.util.Objects; |
| import java.util.logging.Logger; |
| |
| /** |
| * Converter, converting from String to Character, the supported format is one of the following: |
| * <ul> |
| * <li>'a'</li> |
| * <li>123 (byte value)</li> |
| * <li>0xFF (byte value)</li> |
| * <li>0XDF (byte value)</li> |
| * <li>0D1 (byte value)</li> |
| * </ul> |
| */ |
| public class CharConverter implements PropertyConverter<Character> { |
| |
| private static final Logger LOG = Logger.getLogger(CharConverter.class.getName()); |
| |
| @Override |
| public Character convert(String value, ConversionContext context) { |
| context.addSupportedFormats(getClass(),"\\'<char>\\'", "<char>", "<charNum>"); |
| String trimmed = Objects.requireNonNull(value).trim(); |
| if(trimmed.isEmpty()){ |
| return null; |
| } |
| if(trimmed.startsWith("'")) { |
| try { |
| trimmed = trimmed.substring(1, trimmed.length() - 1); |
| if (trimmed.isEmpty()) { |
| return null; |
| } |
| return trimmed.charAt(0); |
| } catch (Exception e) { |
| LOG.finest("Invalid character format encountered: '" + value + "', valid formats are 'a', 101 and a."); |
| return null; |
| } |
| } |
| try { |
| Integer val = Integer.parseInt(trimmed); |
| return (char) val.shortValue(); |
| } catch (Exception e) { |
| LOG.finest("Character format is not numeric: '" + value + "', using first character."); |
| return trimmed.charAt(0); |
| } |
| } |
| |
| } |