001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *
010 *    http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License.
018 *
019 */
020package org.apache.mina.integration.beans;
021
022import java.beans.PropertyEditor;
023import java.util.regex.Pattern;
024
025/**
026 * A {@link PropertyEditor} which converts a {@link String} into
027 * a {@link Character} and vice versa.
028 *
029 * @author <a href="http://mina.apache.org">Apache MINA Project</a>
030 */
031public class CharacterEditor extends AbstractPropertyEditor {
032    private static final Pattern UNICODE = Pattern.compile("\\\\[uU][0-9a-fA-F]+");
033
034    @Override
035    protected String toText(Object value) {
036        return String.valueOf(value);
037    }
038
039    @Override
040    protected Object toValue(String text) throws IllegalArgumentException {
041        if (text.length() == 0) {
042            return Character.valueOf(Character.MIN_VALUE);
043        }
044
045        if (UNICODE.matcher(text).matches()) {
046            return Character.valueOf((char) Integer.parseInt(text.substring(2)));
047        }
048
049        if (text.length() != 1) {
050            throw new IllegalArgumentException("Too many characters: " + text);
051        }
052
053        return Character.valueOf(text.charAt(0));
054    }
055}