/*
* 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 Software Foundation, 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.PageContextImpl;
import com.caucho.util.L10N;
import javax.el.ELContext;
import javax.el.ELException;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.BodyTagSupport;
import java.io.IOException;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.Locale;
/**
* Looks up an i18n message from a bundle and prints it.
*/
public class ParseNumberTag extends BodyTagSupport {
private static L10N L = new L10N(ParseNumberTag.class);
private Expr _valueExpr;
private Expr _typeExpr;
private Expr _patternExpr;
private Expr _parseLocaleExpr;
private Expr _integerOnlyExpr;
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 parse locale
*
* @param locale the JSP-EL expression for the number pattern.
*/
public void setParseLocale(Expr locale)
{
_parseLocaleExpr = locale;
}
/**
* Sets true if integer only parsing.
*
* @param integerOnly the JSP-EL expression for the number pattern.
*/
public void setIntegerOnly(Expr integerOnly)
{
_integerOnlyExpr = integerOnly;
}
/**
* 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;
JspWriter out = pageContext.getOut();
NumberFormat format = getFormat();
String string;
if (_valueExpr != null)
string = _valueExpr.evalString(pageContext.getELContext());
else
string = bodyContent.getString().trim();
Number value = format.parse(string);
if (_var == null)
out.print(value);
else
CoreSetTag.setValue(pageContext, _var, _scope, value);
} catch (IOException e) {
} catch (ParseException e) {
throw new JspException(e);
} catch (ELException e) {
throw new JspException(e);
}
return EVAL_PAGE;
}
protected NumberFormat getFormat()
throws JspException, ELException
{
PageContextImpl pageContext = (PageContextImpl) this.pageContext;
ELContext env = pageContext.getELContext();
NumberFormat format = null;
Locale locale = null;
if (_parseLocaleExpr != null) {
Object localeObj = _parseLocaleExpr.evalObject(env);
if (localeObj instanceof Locale)
locale = (Locale) localeObj;
else if (localeObj instanceof String)
locale = pageContext.getLocale((String) localeObj, null);
}
if (locale == null)
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(locale);
}
else
throw new JspException(L.l("unknown formatNumber type `{0}'",
type));
if (_integerOnlyExpr != null)
format.setParseIntegerOnly(_integerOnlyExpr.evalBoolean(env));
return format;
}
}