/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Apache Cocoon" and "Apache Software Foundation" must not be
used to endorse or promote products derived from this software without
prior written permission. For written permission, please contact
apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation and was originally created by
Stefano Mazzocchi <stefano@apache.org>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.cocoon.woody.datatype.convertor;
import org.outerj.i18n.I18nSupport;
import org.outerj.i18n.DecimalFormat;
import java.util.Locale;
import java.text.ParseException;
import java.math.BigDecimal;
import java.math.BigInteger;
/**
* A Convertor for {@link BigDecimal}s backed by the
* {@link java.text.DecimalFormat DecimalFormat} class.
*
* <p>It can be configured to use one of these variants: integer,
* number, currency or percent.
*
* <p>Alternatively, a <strong>formatting pattern</strong> can be used. This can either be a locale-dependent
* or locale-independent formatting pattern. When looking up a formatting pattern, a mechansim
* similar to resource bundle lookup is used. Suppose the locale is nl-BE, then first a formatting
* pattern for nl-BE will be sought, then one for nl, and if that is not
* found, finally the locale-independent formatting pattern will be used.
*
* <p>Note: the earlier statement about the fact that this class uses java.text.DecimalFormat
* is not entirely correct. In fact, it uses a small wrapper class that will either delegate to
* java.text.DecimalFormat or com.ibm.icu.text.DecimalFormat. The com.ibm version will automatically
* be used if it is present on the classpath, otherwise the java.text version will be used.
*/
public class FormattingDecimalConvertor implements Convertor {
private int variant;
/** Locale-specific formatting patterns. */
private LocaleMap localizedPatterns;
/** Non-locale specific formatting pattern. */
private String nonLocalizedPattern;
public static final int INTEGER = 0;
public static final int NUMBER = 1;
public static final int CURRENCY = 2;
public static final int PERCENT = 3;
public FormattingDecimalConvertor() {
this.variant = getDefaultVariant();
this.localizedPatterns = new LocaleMap();
}
protected int getDefaultVariant() {
return NUMBER;
}
public Object convertFromString(String value, Locale locale, Convertor.FormatCache formatCache) {
DecimalFormat decimalFormat = getDecimalFormat(locale, formatCache);
try {
Number decimalValue = decimalFormat.parse(value);
if (decimalValue instanceof BigDecimal)
;
else if (decimalValue instanceof Integer)
decimalValue = new BigDecimal(decimalValue .intValue());
else if (decimalValue instanceof Long)
decimalValue = new BigDecimal(decimalValue.longValue());
else if (decimalValue instanceof Double)
decimalValue = new BigDecimal(decimalValue.doubleValue());
else if (decimalValue instanceof BigInteger)
decimalValue = new BigDecimal((BigInteger)decimalValue);
else
return null;
return decimalValue;
} catch (ParseException e) {
return null;
}
}
public String convertToString(Object value, Locale locale, Convertor.FormatCache formatCache) {
DecimalFormat decimalFormat = getDecimalFormat(locale, formatCache);
return decimalFormat.format(value);
}
protected final DecimalFormat getDecimalFormat(Locale locale, Convertor.FormatCache formatCache) {
DecimalFormat decimalFormat = null;
if (formatCache != null)
decimalFormat = (DecimalFormat)formatCache.get();
if (decimalFormat == null) {
decimalFormat = getDecimalFormat(locale);
if (formatCache != null)
formatCache.store(decimalFormat);
}
return decimalFormat;
}
private DecimalFormat getDecimalFormat(Locale locale) {
DecimalFormat decimalFormat = null;
switch (variant) {
case INTEGER:
decimalFormat = I18nSupport.getInstance().getIntegerFormat(locale);
break;
case NUMBER:
decimalFormat = I18nSupport.getInstance().getNumberFormat(locale);
break;
case CURRENCY:
decimalFormat = I18nSupport.getInstance().getCurrencyFormat(locale);
break;
case PERCENT:
decimalFormat = I18nSupport.getInstance().getPercentFormat(locale);
break;
}
String pattern = (String)localizedPatterns.get(locale);
if (pattern != null)
decimalFormat.applyLocalizedPattern(pattern);
else if (nonLocalizedPattern != null)
decimalFormat.applyPattern(nonLocalizedPattern);
return decimalFormat;
}
public void setVariant(int variant) {
if (variant != INTEGER && variant != NUMBER && variant != CURRENCY && variant != PERCENT)
throw new IllegalArgumentException("Invalid value for variant parameter.");
this.variant = variant;
}
public void addFormattingPattern(Locale locale, String pattern) {
localizedPatterns.put(locale, pattern);
}
public void setNonLocalizedPattern(String pattern) {
this.nonLocalizedPattern = pattern;
}
public Class getTypeClass() {
return java.math.BigDecimal.class;
}
}