001// Copyright 2009 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007//     http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.tapestry5.internal.translator;
016
017import java.text.DecimalFormatSymbols;
018import java.text.ParseException;
019
020/**
021 * Base class for parsing/formatting BigInteger and BigDecimal.
022 *
023 * @since 5.1.0.1
024 */
025public abstract class BigTypesFormatter implements NumericFormatter
026{
027    protected final DecimalFormatSymbols symbols;
028
029    public BigTypesFormatter(DecimalFormatSymbols symbols)
030    {
031        this.symbols = symbols;
032    }
033
034    protected String toString(char ch)
035    {
036        return String.valueOf(ch);
037    }
038
039    public String toClient(Number value)
040    {
041        String normal = value.toString();
042
043        // When formatting integers, we don't use the grouping seperator.
044
045        return normal.replace('-', symbols.getMinusSign()).replace('.', symbols.getDecimalSeparator());
046    }
047
048    public Number parse(String clientValue) throws ParseException
049    {
050        // Allow for " " here since FF2/IE replaces \u00A0 (non breaking space) with \u0020 (normal space)
051        String noGroups = clientValue.replace(toString(symbols.getGroupingSeparator()), "").replace(" ", "");
052        String fixedNeg = noGroups.replace(symbols.getMinusSign(), '-');
053        String fixedDec = fixedNeg.replace(symbols.getDecimalSeparator(), '.');
054
055        try
056        {
057            return parseConvertedValue(fixedDec);
058        }
059        catch (NumberFormatException ex)
060        {
061            throw new ParseException(ex.getMessage(), 0);
062        }
063    }
064
065    protected abstract Number parseConvertedValue(String converted);
066}