/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.jstl.el;
import com.caucho.el.Expr;
import com.caucho.jsp.BodyContentImpl;
import com.caucho.jsp.PageContextImpl;
import com.caucho.util.L10N;
import javax.el.ELContext;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.BodyTagSupport;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.util.Locale;
/**
* Looks up an i18n message from a bundle and prints it.
*/
public class FormatNumberTag extends BodyTagSupport {
private static L10N L = new L10N(FormatNumberTag.class);
private Expr _valueExpr;
private Expr _typeExpr;
private Expr _patternExpr;
private Expr _currencyCodeExpr;
private Expr _currencySymbolExpr;
private Expr _groupingUsedExpr;
private Expr _maxIntegerDigitsExpr;
private Expr _minIntegerDigitsExpr;
private Expr _maxFractionDigitsExpr;
private Expr _minFractionDigitsExpr;
private String _var;
private String _scope;
/**
* Sets the formatting value.
*
* @param value the JSP-EL expression for the value.
*/
public void setValue(Expr value)
{
_valueExpr = value;
}
/**
* Sets the formatting type.
*
* @param type the JSP-EL expression for the type.
*/
public void setType(Expr type)
{
_typeExpr = type;
}
/**
* Sets the number pattern.
*
* @param pattern the JSP-EL expression for the number pattern.
*/
public void setPattern(Expr pattern)
{
_patternExpr = pattern;
}
/**
* Sets the currency code.
*
* @param currencyCode the JSP-EL expression for the currency code.
*/
public void setCurrencyCode(Expr currencyCode)
{
_currencyCodeExpr = currencyCode;
}
/**
* Sets the currency symbol.
*
* @param currencySymbol the JSP-EL expression for the currency symbol.
*/
public void setCurrencySymbol(Expr currencySymbol)
{
_currencySymbolExpr = currencySymbol;
}
/**
* Sets the groupingUsed expression
*
* @param groupingUsed the JSP-EL expression for the grouping pattern.
*/
public void setGroupingUsed(Expr groupingUsed)
{
_groupingUsedExpr = groupingUsed;
}
/**
* Sets the minimum digits allowed in the integer portion.
*
* @param minIntegerDigits the JSP-EL expression for the digits.
*/
public void setMinIntegerDigits(Expr minIntegerDigits)
{
_minIntegerDigitsExpr = minIntegerDigits;
}
/**
* Sets the maximum digits allowed in the integer portion.
*
* @param maxIntegerDigits the JSP-EL expression for the digits.
*/
public void setMaxIntegerDigits(Expr maxIntegerDigits)
{
_maxIntegerDigitsExpr = maxIntegerDigits;
}
/**
* Sets the minimum digits allowed in the fraction portion.
*
* @param minFractionDigits the JSP-EL expression for the digits.
*/
public void setMinFractionDigits(Expr minFractionDigits)
{
_minFractionDigitsExpr = minFractionDigits;
}
/**
* Sets the maximum digits allowed in the fraction portion.
*
* @param maxFractionDigits the JSP-EL expression for the digits.
*/
public void setMaxFractionDigits(Expr maxFractionDigits)
{
_maxFractionDigitsExpr = maxFractionDigits;
}
/**
* Sets the variable name.
*
* @param var the variable name to store the value in.
*/
public void setVar(String var)
{
_var = var;
}
/**
* Sets the variable scope.
*
* @param scope the variable scope to store the value in.
*/
public void setScope(String scope)
{
_scope = scope;
}
/**
* Process the tag.
*/
public int doEndTag()
throws JspException
{
try {
PageContextImpl pageContext = (PageContextImpl) this.pageContext;
ELContext env = pageContext.getELContext();
JspWriter out = pageContext.getOut();
double number;
BodyContentImpl body = (BodyContentImpl) getBodyContent();
if (_valueExpr != null)
number = _valueExpr.evalDouble(env);
else if (body != null) {
String value = body.getTrimString();
if (! value.equals(""))
number = Double.parseDouble(value);
else
number = 0.0;
}
else
number = 0.0;
if (Double.isNaN(number))
number = 0;
NumberFormat format = getFormat();
String value;
if (format != null)
value = format.format(number);
else
value = String.valueOf(number);
if (_var == null)
out.print(value);
else
CoreSetTag.setValue(pageContext, _var, _scope, value);
} catch (Exception e) {
throw new JspException(e);
}
return EVAL_PAGE;
}
protected NumberFormat getFormat()
throws JspException
{
try {
PageContextImpl pageContext = (PageContextImpl) this.pageContext;
ELContext env = pageContext.getELContext();
NumberFormat format = null;
Locale locale = pageContext.getLocale();
String type = null;
if (_typeExpr != null)
type = _typeExpr.evalString(env);
if (type == null || type.equals("") || type.equals("number")) {
if (locale != null)
format = NumberFormat.getInstance(locale);
else
format = NumberFormat.getInstance();
DecimalFormat decimalFormat = (DecimalFormat) format;
if (_patternExpr != null)
decimalFormat.applyPattern(_patternExpr.evalString(env));
}
else if (type.equals("percent")) {
if (locale != null)
format = NumberFormat.getPercentInstance(locale);
else
format = NumberFormat.getPercentInstance();
}
else if (type.equals("currency")) {
if (locale != null)
format = NumberFormat.getCurrencyInstance(locale);
else
format = NumberFormat.getCurrencyInstance();
if ((_currencyCodeExpr != null || _currencySymbolExpr != null) &&
format instanceof DecimalFormat) {
DecimalFormat dFormat = (DecimalFormat) format;
DecimalFormatSymbols dSymbols;
dSymbols = dFormat.getDecimalFormatSymbols();
if (_currencyCodeExpr != null && dSymbols != null)
dSymbols.setInternationalCurrencySymbol(_currencyCodeExpr.evalString(env));
if (_currencySymbolExpr != null && dSymbols != null)
dSymbols.setCurrencySymbol(_currencySymbolExpr.evalString(env));
dFormat.setDecimalFormatSymbols(dSymbols);
}
}
else
throw new JspException(L.l("unknown formatNumber type `{0}'",
type));
if (_groupingUsedExpr != null)
format.setGroupingUsed(_groupingUsedExpr.evalBoolean(env));
if (_minIntegerDigitsExpr != null)
format.setMinimumIntegerDigits((int) _minIntegerDigitsExpr.evalLong(env));
if (_maxIntegerDigitsExpr != null)
format.setMaximumIntegerDigits((int) _maxIntegerDigitsExpr.evalLong(env));
if (_minFractionDigitsExpr != null)
format.setMinimumFractionDigits((int) _minFractionDigitsExpr.evalLong(env));
if (_maxFractionDigitsExpr != null)
format.setMaximumFractionDigits((int) _maxFractionDigitsExpr.evalLong(env));
return format;
} catch (Exception e) {
throw new JspException(e);
}
}
}