api/src/main/java/javax/faces/convert/NumberConverter.java - myfaces - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file
  * to you 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 java.math.BigDecimal;
 import java.text.DecimalFormat;
 import java.text.DecimalFormatSymbols;
 import java.text.NumberFormat;
 import java.text.ParseException;
 import java.util.Currency;
 import java.util.Locale;

 import javax.el.ValueExpression;
 import javax.faces.component.StateHolder;
 import javax.faces.component.UIComponent;
 import javax.faces.context.FacesContext;

 import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFConverter;
 import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFJspProperty;
 import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFProperty;

 /**
  * This tag creates a number formatting converter and associates it
  * with the nearest parent UIComponent.
  *
  * Unless otherwise specified, all attributes accept static values or EL expressions.
  *
  * see Javadoc of <a href="http://java.sun.com/javaee/javaserverfaces/1.2/docs/api/index.html">JSF Specification</a>
  *
  * @author Thomas Spiegl (latest modification by $Author$)
  * @version $Revision$ $Date$
  */
 @JSFConverter(
     name="f:convertNumber",
     bodyContent="empty",
     tagClass="org.apache.myfaces.taglib.core.ConvertNumberTag")
 @JSFJspProperty(
     name="binding",
     returnType = "javax.faces.convert.NumberConverter",
     longDesc = "A ValueExpression that evaluates to a NumberConverter.")
 public class NumberConverter
         implements Converter, StateHolder
 {
     // API FIELDS
     public static final String CONVERTER_ID = "javax.faces.Number";
     public static final String STRING_ID = "javax.faces.converter.STRING";
     public static final String CURRENCY_ID = "javax.faces.converter.NumberConverter.CURRENCY";
     public static final String NUMBER_ID = "javax.faces.converter.NumberConverter.NUMBER";
     public static final String PATTERN_ID = "javax.faces.converter.NumberConverter.PATTERN";
     public static final String PERCENT_ID = "javax.faces.converter.NumberConverter.PERCENT";

     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);

                 DecimalFormat df = (DecimalFormat)format;

                 // The best we can do in this case is check if there is a ValueExpression
                 // with a BigDecimal as returning type , and if that so enable BigDecimal parsing
                 // to prevent loss in precision, and do not break existing examples (since
                 // in those cases it is expected to return Double). See MYFACES-1890 and TRINIDAD-1124
                 // for details
                 ValueExpression valueBinding = uiComponent.getValueExpression("value");
                 if (valueBinding != null)
                 {
                     Class<?> destType = valueBinding.getType(facesContext.getELContext());
                     if (destType != null && BigDecimal.class.isAssignableFrom(destType))
                     {
                         df.setParseBigDecimal(true);
                     }
                 }

                 DecimalFormatSymbols dfs = df.getDecimalFormatSymbols();
                 boolean changed = false;
                 if(dfs.getGroupingSeparator() == '\u00a0')
                 {
                   dfs.setGroupingSeparator(' ');
                   df.setDecimalFormatSymbols(dfs);
                   value = value.replace('\u00a0', ' ');
                   changed = true;
                 }

                 formatCurrency(format);

                 try
                 {
                     return format.parse(value);
                 }
                 catch (ParseException e)
                 {
                   if(changed)
                   {
                     dfs.setGroupingSeparator('\u00a0');
                     df.setDecimalFormatSymbols(dfs);
                   }
                   try
                   {
                     return format.parse(value);
                   }
                   catch (ParseException pe)
                   {

                     if(getPattern() != null)
                         throw new ConverterException(_MessageUtils.getErrorMessage(facesContext,
                                                                                     PATTERN_ID,
                                                                                     new Object[]{value,"$###,###",_MessageUtils.getLabel(facesContext, uiComponent)}));
                     else if(getType().equals("number"))
                         throw new ConverterException(_MessageUtils.getErrorMessage(facesContext,
                                                                                     NUMBER_ID,
                                                                                     new Object[]{value,format.format(21),_MessageUtils.getLabel(facesContext, uiComponent)}));
                     else if(getType().equals("currency"))
                         throw new ConverterException(_MessageUtils.getErrorMessage(facesContext,
                                                                                     CURRENCY_ID,
                                                                                     new Object[]{value,format.format(42.25),_MessageUtils.getLabel(facesContext, uiComponent)}));
                     else if(getType().equals("percent"))
                         throw new ConverterException(_MessageUtils.getErrorMessage(facesContext,
                                                                                     PERCENT_ID,
                                                                                     new Object[]{value,format.format(.90),_MessageUtils.getLabel(facesContext, uiComponent)}));
                   }
                 }
             }
         }
         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(_MessageUtils.getErrorMessage(facesContext, STRING_ID, new Object[]{value,_MessageUtils.getLabel(facesContext, uiComponent)}),e);
         }
     }

     private NumberFormat getNumberFormat(FacesContext facesContext)
     {
         Locale locale = _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(locale));
         }

         // type
         if (_type.equals("number"))
         {
             return NumberFormat.getNumberInstance(locale);
         }
         else if (_type.equals("currency"))
         {
             return NumberFormat.getCurrencyInstance(locale);
         }
         else if (_type.equals("percent"))
         {
             return NumberFormat.getPercentInstance(locale);
         }
         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

     /**
      * ISO 4217 currency code
      *
      */
     @JSFProperty
     public String getCurrencyCode()
     {
         return _currencyCode != null ?
                _currencyCode :
                getDecimalFormatSymbols().getInternationalCurrencySymbol();
     }

     public void setCurrencyCode(String currencyCode)
     {
         _currencyCode = currencyCode;
     }

     /**
      * The currency symbol used to format a currency value.  Defaults
      * to the currency symbol for locale.
      *
      */
     @JSFProperty
     public String getCurrencySymbol()
     {
         return _currencySymbol != null ?
                _currencySymbol :
                getDecimalFormatSymbols().getCurrencySymbol();
     }

     public void setCurrencySymbol(String currencySymbol)
     {
         _currencySymbol = currencySymbol;
     }

     /**
      * Specifies whether output will contain grouping separators.  Default: true.
      *
      */
     @JSFProperty
     public boolean isGroupingUsed()
     {
         return _groupingUsed;
     }

     public void setGroupingUsed(boolean groupingUsed)
     {
         _groupingUsed = groupingUsed;
     }

     /**
      * Specifies whether only the integer part of the input will be parsed.  Default: false.
      *
      */
     @JSFProperty
     public boolean isIntegerOnly()
     {
         return _integerOnly;
     }

     public void setIntegerOnly(boolean integerOnly)
     {
         _integerOnly = integerOnly;
     }

     /**
      * The name of the locale to be used, instead of the default as
      * specified in the faces configuration file.
      *
      */
     @JSFProperty
     public Locale getLocale()
     {
         if (_locale != null) return _locale;
         FacesContext context = FacesContext.getCurrentInstance();
         return context.getViewRoot().getLocale();
     }

     public void setLocale(Locale locale)
     {
         _locale = locale;
     }

     /**
      * The maximum number of digits in the fractional portion of the number.
      *
      */
     @JSFProperty
     public int getMaxFractionDigits()
     {
         return _maxFractionDigits;
     }

     public void setMaxFractionDigits(int maxFractionDigits)
     {
         _maxFractionDigitsSet = true;
         _maxFractionDigits = maxFractionDigits;
     }

     /**
      * The maximum number of digits in the integer portion of the number.
      *
      */
     @JSFProperty
     public int getMaxIntegerDigits()
     {
         return _maxIntegerDigits;
     }

     public void setMaxIntegerDigits(int maxIntegerDigits)
     {
         _maxIntegerDigitsSet = true;
         _maxIntegerDigits = maxIntegerDigits;
     }

     /**
      * The minimum number of digits in the fractional portion of the number.
      *
      */
     @JSFProperty
     public int getMinFractionDigits()
     {
         return _minFractionDigits;
     }

     public void setMinFractionDigits(int minFractionDigits)
     {
         _minFractionDigitsSet = true;
         _minFractionDigits = minFractionDigits;
     }

     /**
      * The minimum number of digits in the integer portion of the number.
      *
      */
     @JSFProperty
     public int getMinIntegerDigits()
     {
         return _minIntegerDigits;
     }

     public void setMinIntegerDigits(int minIntegerDigits)
     {
         _minIntegerDigitsSet = true;
         _minIntegerDigits = minIntegerDigits;
     }

     /**
      * A custom Date formatting pattern, in the format used by java.text.SimpleDateFormat.
      *
      */
     @JSFProperty
     public String getPattern()
     {
         return _pattern;
     }

     public void setPattern(String pattern)
     {
         _pattern = pattern;
     }

     public boolean isTransient()
     {
         return _transient;
     }

     public void setTransient(boolean aTransient)
     {
         _transient = aTransient;
     }

     /**
      * The type of formatting/parsing to be performed.  Values include:
      * number, currency, and percent.  Default: number.
      *
      */
     @JSFProperty
     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());
     }
 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you 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 java.math.BigDecimal;
	import java.text.DecimalFormat;
	import java.text.DecimalFormatSymbols;
	import java.text.NumberFormat;
	import java.text.ParseException;
	import java.util.Currency;
	import java.util.Locale;

	import javax.el.ValueExpression;
	import javax.faces.component.StateHolder;
	import javax.faces.component.UIComponent;
	import javax.faces.context.FacesContext;

	import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFConverter;
	import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFJspProperty;
	import org.apache.myfaces.buildtools.maven2.plugin.builder.annotation.JSFProperty;

	/**
	* This tag creates a number formatting converter and associates it
	* with the nearest parent UIComponent.
	*
	* Unless otherwise specified, all attributes accept static values or EL expressions.
	*
	* see Javadoc of <a href="http://java.sun.com/javaee/javaserverfaces/1.2/docs/api/index.html">JSF Specification</a>
	*
	* @author Thomas Spiegl (latest modification by $Author$)
	* @version $Revision$ $Date$
	*/
	@JSFConverter(
	name="f:convertNumber",
	bodyContent="empty",
	tagClass="org.apache.myfaces.taglib.core.ConvertNumberTag")
	@JSFJspProperty(
	name="binding",
	returnType = "javax.faces.convert.NumberConverter",
	longDesc = "A ValueExpression that evaluates to a NumberConverter.")
	public class NumberConverter
	implements Converter, StateHolder
	{
	// API FIELDS
	public static final String CONVERTER_ID = "javax.faces.Number";
	public static final String STRING_ID = "javax.faces.converter.STRING";
	public static final String CURRENCY_ID = "javax.faces.converter.NumberConverter.CURRENCY";
	public static final String NUMBER_ID = "javax.faces.converter.NumberConverter.NUMBER";
	public static final String PATTERN_ID = "javax.faces.converter.NumberConverter.PATTERN";
	public static final String PERCENT_ID = "javax.faces.converter.NumberConverter.PERCENT";

	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);

	DecimalFormat df = (DecimalFormat)format;

	// The best we can do in this case is check if there is a ValueExpression
	// with a BigDecimal as returning type , and if that so enable BigDecimal parsing
	// to prevent loss in precision, and do not break existing examples (since
	// in those cases it is expected to return Double). See MYFACES-1890 and TRINIDAD-1124
	// for details
	ValueExpression valueBinding = uiComponent.getValueExpression("value");
	if (valueBinding != null)
	{
	Class<?> destType = valueBinding.getType(facesContext.getELContext());
	if (destType != null && BigDecimal.class.isAssignableFrom(destType))
	{
	df.setParseBigDecimal(true);
	}
	}

	DecimalFormatSymbols dfs = df.getDecimalFormatSymbols();
	boolean changed = false;
	if(dfs.getGroupingSeparator() == '\u00a0')
	{
	dfs.setGroupingSeparator(' ');
	df.setDecimalFormatSymbols(dfs);
	value = value.replace('\u00a0', ' ');
	changed = true;
	}

	formatCurrency(format);

	try
	{
	return format.parse(value);
	}
	catch (ParseException e)
	{
	if(changed)
	{
	dfs.setGroupingSeparator('\u00a0');
	df.setDecimalFormatSymbols(dfs);
	}
	try
	{
	return format.parse(value);
	}
	catch (ParseException pe)
	{

	if(getPattern() != null)
	throw new ConverterException(_MessageUtils.getErrorMessage(facesContext,
	PATTERN_ID,
	new Object[]{value,"$###,###",_MessageUtils.getLabel(facesContext, uiComponent)}));
	else if(getType().equals("number"))
	throw new ConverterException(_MessageUtils.getErrorMessage(facesContext,
	NUMBER_ID,
	new Object[]{value,format.format(21),_MessageUtils.getLabel(facesContext, uiComponent)}));
	else if(getType().equals("currency"))
	throw new ConverterException(_MessageUtils.getErrorMessage(facesContext,
	CURRENCY_ID,
	new Object[]{value,format.format(42.25),_MessageUtils.getLabel(facesContext, uiComponent)}));
	else if(getType().equals("percent"))
	throw new ConverterException(_MessageUtils.getErrorMessage(facesContext,
	PERCENT_ID,
	new Object[]{value,format.format(.90),_MessageUtils.getLabel(facesContext, uiComponent)}));
	}
	}
	}
	}
	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(_MessageUtils.getErrorMessage(facesContext, STRING_ID, new Object[]{value,_MessageUtils.getLabel(facesContext, uiComponent)}),e);
	}
	}

	private NumberFormat getNumberFormat(FacesContext facesContext)
	{
	Locale locale = _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(locale));
	}

	// type
	if (_type.equals("number"))
	{
	return NumberFormat.getNumberInstance(locale);
	}
	else if (_type.equals("currency"))
	{
	return NumberFormat.getCurrencyInstance(locale);
	}
	else if (_type.equals("percent"))
	{
	return NumberFormat.getPercentInstance(locale);
	}
	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

	/**
	* ISO 4217 currency code
	*
	*/
	@JSFProperty
	public String getCurrencyCode()
	{
	return _currencyCode != null ?
	_currencyCode :
	getDecimalFormatSymbols().getInternationalCurrencySymbol();
	}

	public void setCurrencyCode(String currencyCode)
	{
	_currencyCode = currencyCode;
	}

	/**
	* The currency symbol used to format a currency value. Defaults
	* to the currency symbol for locale.
	*
	*/
	@JSFProperty
	public String getCurrencySymbol()
	{
	return _currencySymbol != null ?
	_currencySymbol :
	getDecimalFormatSymbols().getCurrencySymbol();
	}

	public void setCurrencySymbol(String currencySymbol)
	{
	_currencySymbol = currencySymbol;
	}

	/**
	* Specifies whether output will contain grouping separators. Default: true.
	*
	*/
	@JSFProperty
	public boolean isGroupingUsed()
	{
	return _groupingUsed;
	}

	public void setGroupingUsed(boolean groupingUsed)
	{
	_groupingUsed = groupingUsed;
	}

	/**
	* Specifies whether only the integer part of the input will be parsed. Default: false.
	*
	*/
	@JSFProperty
	public boolean isIntegerOnly()
	{
	return _integerOnly;
	}

	public void setIntegerOnly(boolean integerOnly)
	{
	_integerOnly = integerOnly;
	}

	/**
	* The name of the locale to be used, instead of the default as
	* specified in the faces configuration file.
	*
	*/
	@JSFProperty
	public Locale getLocale()
	{
	if (_locale != null) return _locale;
	FacesContext context = FacesContext.getCurrentInstance();
	return context.getViewRoot().getLocale();
	}

	public void setLocale(Locale locale)
	{
	_locale = locale;
	}

	/**
	* The maximum number of digits in the fractional portion of the number.
	*
	*/
	@JSFProperty
	public int getMaxFractionDigits()
	{
	return _maxFractionDigits;
	}

	public void setMaxFractionDigits(int maxFractionDigits)
	{
	_maxFractionDigitsSet = true;
	_maxFractionDigits = maxFractionDigits;
	}

	/**
	* The maximum number of digits in the integer portion of the number.
	*
	*/
	@JSFProperty
	public int getMaxIntegerDigits()
	{
	return _maxIntegerDigits;
	}

	public void setMaxIntegerDigits(int maxIntegerDigits)
	{
	_maxIntegerDigitsSet = true;
	_maxIntegerDigits = maxIntegerDigits;
	}

	/**
	* The minimum number of digits in the fractional portion of the number.
	*
	*/
	@JSFProperty
	public int getMinFractionDigits()
	{
	return _minFractionDigits;
	}

	public void setMinFractionDigits(int minFractionDigits)
	{
	_minFractionDigitsSet = true;
	_minFractionDigits = minFractionDigits;
	}

	/**
	* The minimum number of digits in the integer portion of the number.
	*
	*/
	@JSFProperty
	public int getMinIntegerDigits()
	{
	return _minIntegerDigits;
	}

	public void setMinIntegerDigits(int minIntegerDigits)
	{
	_minIntegerDigitsSet = true;
	_minIntegerDigits = minIntegerDigits;
	}

	/**
	* A custom Date formatting pattern, in the format used by java.text.SimpleDateFormat.
	*
	*/
	@JSFProperty
	public String getPattern()
	{
	return _pattern;
	}

	public void setPattern(String pattern)
	{
	_pattern = pattern;
	}

	public boolean isTransient()
	{
	return _transient;
	}

	public void setTransient(boolean aTransient)
	{
	_transient = aTransient;
	}

	/**
	* The type of formatting/parsing to be performed. Values include:
	* number, currency, and percent. Default: number.
	*
	*/
	@JSFProperty
	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());
	}
	}