    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}