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 Number} and vice versa. 028 * 029 * @author <a href="http://mina.apache.org">Apache MINA Project</a> 030 */ 031public class NumberEditor extends AbstractPropertyEditor { 032 private static final Pattern DECIMAL = Pattern.compile("[-+]?[0-9]*\\.?[0-9]*(?:[Ee][-+]?[0-9]+)?"); 033 034 private static final Pattern HEXADECIMAL = Pattern.compile("0x[0-9a-fA-F]+"); 035 036 private static final Pattern OCTET = Pattern.compile("0[0-9][0-9]*"); 037 038 @Override 039 protected final String toText(Object value) { 040 return (value == null ? "" : value.toString()); 041 } 042 043 @Override 044 protected final Object toValue(String text) throws IllegalArgumentException { 045 if (text.length() == 0) { 046 return defaultValue(); 047 } 048 049 if (HEXADECIMAL.matcher(text).matches()) { 050 return toValue(text.substring(2), 16); 051 } 052 053 if (OCTET.matcher(text).matches()) { 054 return toValue(text, 8); 055 } 056 057 if (DECIMAL.matcher(text).matches()) { 058 return toValue(text, 10); 059 } 060 061 throw new NumberFormatException("Not a number: " + text); 062 } 063 064 protected Object toValue(String text, int radix) { 065 return Integer.parseInt(text, radix); 066 } 067 068 @Override 069 protected Object defaultValue() { 070 return Integer.valueOf(0); 071 } 072}