// -*- c++ -*-

/*
 * Jakelib2 - General purpose C++ library
 * Copyright (C) 2001 Florian Wolff  (florian@donuz.de)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * $Id: NumberFormat.jlc,v 1.14 2003/09/27 08:10:28 florian Exp $
 */

#include "jakelib2.h"
#include "jakelib2/text/NumberFormat.h"
#include "jakelib2/text/DecimalFormat.h"

using namespace jakelib::lang;
using namespace jakelib::text;
using namespace jakelib::util;

JAKELIB_IMPLEMENT_CLASS("jakelib.text.NumberFormat", NumberFormat, Format);

jint NumberFormat::INTEGER_FIELD = 0;
jint NumberFormat::FRACTION_FIELD = 1;


/*****************************************************************************\
 * NumberFormat                                                               |
 *****************************************************************************/
NumberFormat::NumberFormat()
{
}


/*****************************************************************************\
 * format                                                                     |
 *****************************************************************************/
String *NumberFormat::format(jlong number)
{
  StringBuffer sbuf;
  format(number, &sbuf, null);

  return sbuf.toString();
}

StringBuffer *NumberFormat::format(Object *obj, StringBuffer *sbuf,
                                   FieldPosition *pos)
{
  if (obj->instanceOf(`"jakelib.lang.Number"`)) {
    return format(((Number *) obj)->doubleValue(), sbuf, pos);
  }
  else {
    throw new IllegalArgumentException(`"Cannot format given Object as a Number"`
                                   .. JAKELIB_AT2("jakelib.text.NumberFormat.format"));
  }
}

String *NumberFormat::format(jdouble number)
{
  StringBuffer *sbuf = new StringBuffer(50);
  format(number, sbuf, null);
  return sbuf->toString();
}


/*****************************************************************************\
 * equals                                                                     |
 *****************************************************************************/
jboolean NumberFormat::equals(Object * obj)
{
  if (!(obj->instanceOf(`"jakelib.text.NumberFormat"`)))
    return false;

  NumberFormat *nf = (NumberFormat *) obj;

  return (groupingUsed == nf->groupingUsed
          && maximumFractionDigits == nf->maximumFractionDigits
          && maximumIntegerDigits == nf->maximumIntegerDigits
          && minimumFractionDigits == nf->minimumFractionDigits
          && minimumIntegerDigits == nf->minimumIntegerDigits
          && parseIntegerOnly == nf->parseIntegerOnly);
}


/*****************************************************************************\
 * getAvailableLocales                                                        |
 *****************************************************************************/
Locales *NumberFormat::getAvailableLocales()
{
  Locales *list = new Locales((jint) 1);

  list->set(0, Locale::US);
  return list;
}


/*****************************************************************************\
 * computeInstance                                                            |
 *****************************************************************************/
NumberFormat *NumberFormat::computeInstance(Locale * loc, String * resource,
                                            String * def)
{
  DecimalFormatSyms *dfs = new DecimalFormatSyms(loc);
  return new DecimalFormat(def, dfs);
}


/*****************************************************************************\
 * getCurrencyInstance                                                        |
 *****************************************************************************/
NumberFormat *NumberFormat::getCurrencyInstance()
{
  return getCurrencyInstance(jakelib::util::Locale::getDefault());
}

NumberFormat *NumberFormat::getCurrencyInstance(jakelib::util::Locale * loc)
{
  return computeInstance(loc, `"currencyFormat"`, `"$#,##0.00;($#,##0.00)"`);
}


/*****************************************************************************\
 * getInstance                                                                |
 *****************************************************************************/
NumberFormat *NumberFormat::getInstance()
{
  return getInstance(jakelib::util::Locale::getDefault());
}

NumberFormat *NumberFormat::getInstance(jakelib::util::Locale * loc)
{
  // For now always return a number instance.
  return getNumberInstance(loc);
}


/*****************************************************************************\
 * getMaximumFractionDigits                                                   |
 *****************************************************************************/
jint NumberFormat::getMaximumFractionDigits()
{
  return maximumFractionDigits;
}


/*****************************************************************************\
 * getMaximumIntegerDigits                                                    |
 *****************************************************************************/
jint NumberFormat::getMaximumIntegerDigits()
{
  return maximumIntegerDigits;
}


/*****************************************************************************\
 * getMaximumFractionDigits                                                   |
 *****************************************************************************/
jint NumberFormat::getMinimumFractionDigits()
{
  return minimumFractionDigits;
}


/*****************************************************************************\
 * getMinimumIntegerDigits                                                    |
 *****************************************************************************/
jint NumberFormat::getMinimumIntegerDigits()
{
  return minimumIntegerDigits;
}


/*****************************************************************************\
 * getNumberInstance                                                          |
 *****************************************************************************/
NumberFormat *NumberFormat::getNumberInstance()
{
  return getNumberInstance(jakelib::util::Locale::getDefault());
}

NumberFormat *NumberFormat::getNumberInstance(jakelib::util::Locale * loc)
{
  return computeInstance(loc, `"numberFormat"`, `"#,##0.###"`);
}


/*****************************************************************************\
 * getPercentInstance                                                         |
 *****************************************************************************/
NumberFormat *NumberFormat::getPercentInstance()
{
  return getPercentInstance(jakelib::util::Locale::getDefault());
}

NumberFormat *NumberFormat::getPercentInstance(jakelib::util::Locale * loc)
{
  return computeInstance(loc, `"percentFormat"`, `"#,##0%"`);
}


/*****************************************************************************\
 * hashCode                                                                   |
 *****************************************************************************/
jint NumberFormat::hashCode()
{
  jint hash = 0;
  hash ^= (maximumFractionDigits + maximumIntegerDigits + minimumFractionDigits +
           minimumIntegerDigits);

  if (groupingUsed) {
    hash ^= 0xf0f0;
  }

  if (parseIntegerOnly) {
    hash ^= 0x0f0f;
  }

  return hash;
}


/*****************************************************************************\
 * isGroupingUsed                                                             |
 *****************************************************************************/
jboolean NumberFormat::isGroupingUsed()
{
  return groupingUsed;
}


/*****************************************************************************\
 * isParseIntegerOnly                                                         |
 *****************************************************************************/
jboolean NumberFormat::isParseIntegerOnly()
{
  return parseIntegerOnly;
}


/*****************************************************************************\
 * parse                                                                      |
 *****************************************************************************/
Number *NumberFormat::parse(String * sourceStr)
{
  ParsePosition *pp = new ParsePosition(0);
  Number *r = parse(sourceStr, pp);

  if (r == null) {
    jint index = pp->getErrorIndex();
    if (index < 0)
      index = pp->getIndex();
    throw new ParseException(`"couldn't parse number"`
                         .. JAKELIB_AT2("jakelib.text.NumberFormat.parse"), index);
  }
  return r;
}


/*****************************************************************************\
 * parseObject                                                                |
 *****************************************************************************/
Object *NumberFormat::parseObject(String * sourceStr, ParsePosition * pos)
{
  return parse(sourceStr, pos);
}


/*****************************************************************************\
 * setGroupingUsed                                                            |
 *****************************************************************************/
void NumberFormat::setGroupingUsed(jboolean newValue)
{
  groupingUsed = newValue;
}


/*****************************************************************************\
 * setMaximumFractionDigits                                                   |
 *****************************************************************************/
void NumberFormat::setMaximumFractionDigits(jint newValue)
{
  maximumFractionDigits = newValue;
  if (getMinimumFractionDigits() > maximumFractionDigits)
    setMinimumFractionDigits(maximumFractionDigits);
}


/*****************************************************************************\
 * setMaximumIntegerDigits                                                    |
 *****************************************************************************/
void NumberFormat::setMaximumIntegerDigits(jint newValue)
{
  maximumIntegerDigits = newValue;
  if (getMinimumIntegerDigits() > maximumIntegerDigits)
    setMinimumIntegerDigits(maximumIntegerDigits);
}


/*****************************************************************************\
 * setMinimumFractionDigits                                                   |
 *****************************************************************************/
void NumberFormat::setMinimumFractionDigits(jint newValue)
{
  minimumFractionDigits = newValue;
  if (getMaximumFractionDigits() < minimumFractionDigits)
    setMaximumFractionDigits(minimumFractionDigits);
}


/*****************************************************************************\
 * setMinimumIntegerDigits                                                    |
 *****************************************************************************/
void NumberFormat::setMinimumIntegerDigits(jint newValue)
{
  minimumIntegerDigits = newValue;
  if (getMaximumIntegerDigits() < minimumIntegerDigits)
    setMaximumIntegerDigits(minimumIntegerDigits);
}


/*****************************************************************************\
 * setParseIntegerOnly                                                        |
 *****************************************************************************/
void NumberFormat::setParseIntegerOnly(jboolean value)
{
  parseIntegerOnly = value;
}