/*
* Copyright 2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package javax.faces.convert;
import javax.faces.component.UIComponent;
import javax.faces.component.StateHolder;
import javax.faces.context.FacesContext;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.Currency;
import java.util.Locale;
/**
* see Javadoc of <a href="http://java.sun.com/j2ee/javaserverfaces/1.1_01/docs/api/index.html">JSF Specification</a>
*
* @author Thomas Spiegl (latest modification by $Author$)
* @version $Revision$ $Date$
*/
public class NumberConverter
implements Converter, StateHolder
{
// API FIELDS
public static final String CONVERTER_ID = "javax.faces.Number";
// internal constants
private static final String CONVERSION_MESSAGE_ID = "javax.faces.convert.NumberConverter.CONVERSION";
private static final boolean JAVA_VERSION_14;
static
{
JAVA_VERSION_14 = checkJavaVersion14();
}
private String _currencyCode;
private String _currencySymbol;
private Locale _locale;
private int _maxFractionDigits;
private int _maxIntegerDigits;
private int _minFractionDigits;
private int _minIntegerDigits;
private String _pattern;
private String _type = "number";
private boolean _groupingUsed = true;
private boolean _integerOnly = false;
private boolean _transient;
private boolean _maxFractionDigitsSet;
private boolean _maxIntegerDigitsSet;
private boolean _minFractionDigitsSet;
private boolean _minIntegerDigitsSet;
// CONSTRUCTORS
public NumberConverter()
{
}
// METHODS
public Object getAsObject(FacesContext facesContext, UIComponent uiComponent, String value)
{
if (facesContext == null) throw new NullPointerException("facesContext");
if (uiComponent == null) throw new NullPointerException("uiComponent");
if (value != null)
{
value = value.trim();
if (value.length() > 0)
{
NumberFormat format = getNumberFormat(facesContext);
format.setParseIntegerOnly(_integerOnly);
try
{
return format.parse(value);
}
catch (ParseException e)
{
throw new ConverterException(_MessageUtils.getErrorMessage(facesContext,
CONVERSION_MESSAGE_ID,
new Object[]{uiComponent.getId(),value}), e);
}
}
}
return null;
}
public String getAsString(FacesContext facesContext, UIComponent uiComponent, Object value)
{
if (facesContext == null) throw new NullPointerException("facesContext");
if (uiComponent == null) throw new NullPointerException("uiComponent");
if (value == null)
{
return "";
}
if (value instanceof String)
{
return (String)value;
}
NumberFormat format = getNumberFormat(facesContext);
format.setGroupingUsed(_groupingUsed);
if (_maxFractionDigitsSet) format.setMaximumFractionDigits(_maxFractionDigits);
if (_maxIntegerDigitsSet) format.setMaximumIntegerDigits(_maxIntegerDigits);
if (_minFractionDigitsSet) format.setMinimumFractionDigits(_minFractionDigits);
if (_minIntegerDigitsSet) format.setMinimumIntegerDigits(_minIntegerDigits);
formatCurrency(format);
try
{
return format.format(value);
}
catch (Exception e)
{
throw new ConverterException("Cannot convert value '" + value + "'");
}
}
private NumberFormat getNumberFormat(FacesContext facesContext)
{
Locale lokale = _locale != null ? _locale : facesContext.getViewRoot().getLocale();
if (_pattern == null && _type == null)
{
throw new ConverterException("Cannot get NumberFormat, either type or pattern needed.");
}
// pattern
if (_pattern != null)
{
return new DecimalFormat(_pattern, new DecimalFormatSymbols(lokale));
}
// type
if (_type.equals("number"))
{
return NumberFormat.getNumberInstance(lokale);
}
else if (_type.equals("currency"))
{
return NumberFormat.getCurrencyInstance(lokale);
}
else if (_type.equals("percent"))
{
return NumberFormat.getPercentInstance(lokale);
}
throw new ConverterException("Cannot get NumberFormat, illegal type " + _type);
}
private void formatCurrency(NumberFormat format)
{
if (_currencyCode == null && _currencySymbol == null)
{
return;
}
boolean useCurrencyCode;
if (JAVA_VERSION_14)
{
useCurrencyCode = _currencyCode != null;
}
else
{
useCurrencyCode = _currencySymbol == null;
}
if (useCurrencyCode)
{
// set Currency
try
{
format.setCurrency(Currency.getInstance(_currencyCode));
}
catch (Exception e)
{
throw new ConverterException("Unable to get Currency instance for currencyCode " +
_currencyCode);
}
}
else if (format instanceof DecimalFormat)
{
DecimalFormat dFormat = (DecimalFormat)format;
DecimalFormatSymbols symbols = dFormat.getDecimalFormatSymbols();
symbols.setCurrencySymbol(_currencySymbol);
dFormat.setDecimalFormatSymbols(symbols);
}
}
// STATE SAVE/RESTORE
public void restoreState(FacesContext facesContext, Object state)
{
Object values[] = (Object[])state;
_currencyCode = (String)values[0];
_currencySymbol = (String)values[1];
_locale = (Locale)values[2];
Integer value = (Integer)values[3];
_maxFractionDigits = value != null ? value.intValue() : 0;
value = (Integer)values[4];
_maxIntegerDigits = value != null ? value.intValue() : 0;
value = (Integer)values[5];
_minFractionDigits = value != null ? value.intValue() : 0;
value = (Integer)values[6];
_minIntegerDigits = value != null ? value.intValue() : 0;
_pattern = (String)values[7];
_type = (String)values[8];
_groupingUsed = ((Boolean)values[9]).booleanValue();
_integerOnly = ((Boolean)values[10]).booleanValue();
_maxFractionDigitsSet = ((Boolean)values[11]).booleanValue();
_maxIntegerDigitsSet = ((Boolean)values[12]).booleanValue();
_minFractionDigitsSet = ((Boolean)values[13]).booleanValue();
_minIntegerDigitsSet = ((Boolean)values[14]).booleanValue();
}
public Object saveState(FacesContext facesContext)
{
Object values[] = new Object[15];
values[0] = _currencyCode;
values[1] = _currencySymbol;
values[2] = _locale;
values[3] = _maxFractionDigitsSet ? new Integer(_maxFractionDigits) : null;
values[4] = _maxIntegerDigitsSet ? new Integer(_maxIntegerDigits) : null;
values[5] = _minFractionDigitsSet ? new Integer(_minFractionDigits) : null;
values[6] = _minIntegerDigitsSet ? new Integer(_minIntegerDigits) : null;
values[7] = _pattern;
values[8] = _type;
values[9] = _groupingUsed ? Boolean.TRUE : Boolean.FALSE;
values[10] = _integerOnly ? Boolean.TRUE : Boolean.FALSE;
values[11] = _maxFractionDigitsSet ? Boolean.TRUE : Boolean.FALSE;
values[12] = _maxIntegerDigitsSet ? Boolean.TRUE : Boolean.FALSE;
values[13] = _minFractionDigitsSet ? Boolean.TRUE : Boolean.FALSE;
values[14] = _minIntegerDigitsSet ? Boolean.TRUE : Boolean.FALSE;
return values;
}
// GETTER & SETTER
public String getCurrencyCode()
{
return _currencyCode != null ?
_currencyCode :
getDecimalFormatSymbols().getInternationalCurrencySymbol();
}
public void setCurrencyCode(String currencyCode)
{
_currencyCode = currencyCode;
}
public String getCurrencySymbol()
{
return _currencySymbol != null ?
_currencySymbol :
getDecimalFormatSymbols().getCurrencySymbol();
}
public void setCurrencySymbol(String currencySymbol)
{
_currencySymbol = currencySymbol;
}
public boolean isGroupingUsed()
{
return _groupingUsed;
}
public void setGroupingUsed(boolean groupingUsed)
{
_groupingUsed = groupingUsed;
}
public boolean isIntegerOnly()
{
return _integerOnly;
}
public void setIntegerOnly(boolean integerOnly)
{
_integerOnly = integerOnly;
}
public Locale getLocale()
{
if (_locale != null) return _locale;
FacesContext context = FacesContext.getCurrentInstance();
return context.getViewRoot().getLocale();
}
public void setLocale(Locale locale)
{
_locale = locale;
}
public int getMaxFractionDigits()
{
return _maxFractionDigits;
}
public void setMaxFractionDigits(int maxFractionDigits)
{
_maxFractionDigitsSet = true;
_maxFractionDigits = maxFractionDigits;
}
public int getMaxIntegerDigits()
{
return _maxIntegerDigits;
}
public void setMaxIntegerDigits(int maxIntegerDigits)
{
_maxIntegerDigitsSet = true;
_maxIntegerDigits = maxIntegerDigits;
}
public int getMinFractionDigits()
{
return _minFractionDigits;
}
public void setMinFractionDigits(int minFractionDigits)
{
_minFractionDigitsSet = true;
_minFractionDigits = minFractionDigits;
}
public int getMinIntegerDigits()
{
return _minIntegerDigits;
}
public void setMinIntegerDigits(int minIntegerDigits)
{
_minIntegerDigitsSet = true;
_minIntegerDigits = minIntegerDigits;
}
public String getPattern()
{
return _pattern;
}
public void setPattern(String pattern)
{
_pattern = pattern;
}
public boolean isTransient()
{
return _transient;
}
public void setTransient(boolean aTransient)
{
_transient = aTransient;
}
public String getType()
{
return _type;
}
public void setType(String type)
{
//TODO: validate type
_type = type;
}
private static boolean checkJavaVersion14()
{
String version = System.getProperty("java.version");
if (version == null)
{
return false;
}
byte java14 = 0;
for (int idx = version.indexOf('.'), i = 0; idx > 0 || version != null; i++)
{
if (idx > 0)
{
byte value = Byte.parseByte(version.substring(0, 1));
version = version.substring(idx + 1, version.length());
idx = version.indexOf('.');
switch (i)
{
case 0:
if (value == 1)
{
java14 = 1;
break;
}
else if (value > 1)
{
java14 = 2;
}
case 1:
if (java14 > 0 && value >= 4)
{
java14 = 2;
}
;
default:
idx = 0;
version = null;
break;
}
}
else
{
byte value = Byte.parseByte(version.substring(0, 1));
if (java14 > 0 && value >= 4)
{
java14 = 2;
}
break;
}
}
return java14 == 2;
}
private DecimalFormatSymbols getDecimalFormatSymbols()
{
return new DecimalFormatSymbols(getLocale());
}
}