/*
 * Copyright 2001-2004 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 org.apache.commons.beanutils.locale.converters;

import org.apache.commons.beanutils.ConversionException;

import java.util.Locale;
import java.text.ParseException;


/**
 * <p>Standard {@link org.apache.commons.beanutils.locale.LocaleConverter}
 * implementation that converts an incoming
 * locale-sensitive String into a <code>java.math.BigDecimal</code> object,
 * optionally using a default value or throwing a
 * {@link org.apache.commons.beanutils.ConversionException}
 * if a conversion error occurs.</p>
 *
 * @author Yauheny Mikulski
 */

public class FloatLocaleConverter extends DecimalLocaleConverter {


    // ----------------------------------------------------------- Constructors

    /**
     * Create a {@link org.apache.commons.beanutils.locale.LocaleConverter}
     * that will throw a {@link org.apache.commons.beanutils.ConversionException}
     * if a conversion error occurs. The locale is the default locale for
     * this instance of the Java Virtual Machine and an unlocalized pattern is used
     * for the convertion.
     *
     */
    public FloatLocaleConverter() {

        this(false);
    }

    /**
     * Create a {@link org.apache.commons.beanutils.locale.LocaleConverter}
     * that will throw a {@link org.apache.commons.beanutils.ConversionException}
     * if a conversion error occurs. The locale is the default locale for
     * this instance of the Java Virtual Machine.
     *
     * @param locPattern    Indicate whether the pattern is localized or not
     */
    public FloatLocaleConverter(boolean locPattern) {

        this(Locale.getDefault(), locPattern);
    }

    /**
     * Create a {@link org.apache.commons.beanutils.locale.LocaleConverter}
     * that will throw a {@link org.apache.commons.beanutils.ConversionException}
     * if a conversion error occurs. An unlocalized pattern is used for the convertion.
     *
     * @param locale        The locale
     */
    public FloatLocaleConverter(Locale locale) {

        this(locale, false);
    }

    /**
     * Create a {@link org.apache.commons.beanutils.locale.LocaleConverter}
     * that will throw a {@link org.apache.commons.beanutils.ConversionException}
     * if a conversion error occurs.
     *
     * @param locale        The locale
     * @param locPattern    Indicate whether the pattern is localized or not
     */
    public FloatLocaleConverter(Locale locale, boolean locPattern) {

        this(locale, (String) null, locPattern);
    }

    /**
     * Create a {@link org.apache.commons.beanutils.locale.LocaleConverter}
     * that will throw a {@link org.apache.commons.beanutils.ConversionException}
     * if a conversion error occurs. An unlocalized pattern is used for the convertion.
     *
     * @param locale        The locale
     * @param pattern       The convertion pattern
     */
    public FloatLocaleConverter(Locale locale, String pattern) {

        this(locale, pattern, false);
    }

    /**
     * Create a {@link org.apache.commons.beanutils.locale.LocaleConverter}
     * that will throw a {@link org.apache.commons.beanutils.ConversionException}
     * if a conversion error occurs.
     *
     * @param locale        The locale
     * @param pattern       The convertion pattern
     * @param locPattern    Indicate whether the pattern is localized or not
     */
    public FloatLocaleConverter(Locale locale, String pattern, boolean locPattern) {

        super(locale, pattern, locPattern);
    }

    /**
     * Create a {@link org.apache.commons.beanutils.locale.LocaleConverter}
     * that will return the specified default value
     * if a conversion error occurs. The locale is the default locale for
     * this instance of the Java Virtual Machine and an unlocalized pattern is used
     * for the convertion.
     *
     * @param defaultValue  The default value to be returned
     */
    public FloatLocaleConverter(Object defaultValue) {

        this(defaultValue, false);
    }

    /**
     * Create a {@link org.apache.commons.beanutils.locale.LocaleConverter}
     * that will return the specified default value
     * if a conversion error occurs. The locale is the default locale for
     * this instance of the Java Virtual Machine.
     *
     * @param defaultValue  The default value to be returned
     * @param locPattern    Indicate whether the pattern is localized or not
     */
    public FloatLocaleConverter(Object defaultValue, boolean locPattern) {

        this(defaultValue, Locale.getDefault(), locPattern);
    }

    /**
     * Create a {@link org.apache.commons.beanutils.locale.LocaleConverter}
     * that will return the specified default value
     * if a conversion error occurs. An unlocalized pattern is used for the convertion.
     *
     * @param defaultValue  The default value to be returned
     * @param locale        The locale
     */
    public FloatLocaleConverter(Object defaultValue, Locale locale) {

        this(defaultValue, locale, false);
    }

    /**
     * Create a {@link org.apache.commons.beanutils.locale.LocaleConverter}
     * that will return the specified default value
     * if a conversion error occurs.
     *
     * @param defaultValue  The default value to be returned
     * @param locale        The locale
     * @param locPattern    Indicate whether the pattern is localized or not
     */
    public FloatLocaleConverter(Object defaultValue, Locale locale, boolean locPattern) {

        this(defaultValue, locale, null, locPattern);
    }

    /**
     * Create a {@link org.apache.commons.beanutils.locale.LocaleConverter}
     * that will return the specified default value
     * if a conversion error occurs. An unlocalized pattern is used for the convertion.
     *
     * @param defaultValue  The default value to be returned
     * @param locale        The locale
     * @param pattern       The convertion pattern
     */
    public FloatLocaleConverter(Object defaultValue, Locale locale, String pattern) {

        this(defaultValue, locale, pattern, false);
    }

    /**
     * Create a {@link org.apache.commons.beanutils.locale.LocaleConverter}
     * that will return the specified default value
     * if a conversion error occurs.
     *
     * @param defaultValue  The default value to be returned
     * @param locale        The locale
     * @param pattern       The convertion pattern
     * @param locPattern    Indicate whether the pattern is localized or not
     */
    public FloatLocaleConverter(Object defaultValue, Locale locale, String pattern, boolean locPattern) {

        super(defaultValue, locale, pattern);
    }

   /**
    * Convert the specified locale-sensitive input object into an output object of the
    * specified type.  This method will return Float value or throw exception if value
    * can not be stored in the Float.
    *
    * @param value The input object to be converted
    * @param pattern The pattern is used for the convertion
    *
    * @exception ConversionException if conversion cannot be performed
    *  successfully
    */
   protected Object parse(Object value, String pattern) throws ParseException {
      final Number parsed = (Number) super.parse(value, pattern);
      if( Math.abs(parsed.doubleValue() - parsed.floatValue()) > parsed.floatValue() * 0.00001 ) {
         throw new ConversionException("Suplied number is not of type Float: "+parsed.longValue());
      }
      return new Float(parsed.floatValue()); // unlike superclass it returns Float type
   }
}