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BeanUtils provides an easy-to-use but flexible wrapper around reflection and introspection.
/*
* 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 org.apache.commons.beanutils.locale.converters;
import org.apache.commons.beanutils.locale.BaseLocaleConverter;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
/**
* Standard {@link org.apache.commons.beanutils.locale.LocaleConverter}
* implementation that converts an incoming
* locale-sensitive object into a java.lang.String object,
* optionally using a default value or throwing a
* {@link org.apache.commons.beanutils.ConversionException}
* if a conversion error occurs.
*
* @author Yauheny Mikulski
*/
public class StringLocaleConverter extends BaseLocaleConverter {
// ----------------------------------------------------- Instance Variables
/** All logging goes through this logger */
private Log log = LogFactory.getLog(StringLocaleConverter.class); //msz fix
// ----------------------------------------------------------- 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 StringLocaleConverter() {
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 StringLocaleConverter(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 StringLocaleConverter(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 StringLocaleConverter(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 StringLocaleConverter(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 StringLocaleConverter(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 StringLocaleConverter(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 StringLocaleConverter(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 StringLocaleConverter(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 StringLocaleConverter(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 StringLocaleConverter(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 StringLocaleConverter(Object defaultValue, Locale locale, String pattern, boolean locPattern) {
super(defaultValue, locale, pattern, locPattern);
}
// --------------------------------------------------------- Methods
/**
* Convert the specified locale-sensitive input object into an output object of the
* specified type.
*
* @param value The input object to be converted
* @param pattern The pattern is used for the convertion
* @return The converted value
*
* @exception org.apache.commons.beanutils.ConversionException if conversion
* cannot be performed successfully
* @throws ParseException if an error occurs
*/
protected Object parse(Object value, String pattern) throws ParseException {
String result = null;
if ((value instanceof Integer) ||
(value instanceof Long) ||
(value instanceof BigInteger) ||
(value instanceof Byte) ||
(value instanceof Short)) {
result = getDecimalFormat(locale, pattern).format(((Number) value).longValue());
}
else if ((value instanceof Double) ||
(value instanceof BigDecimal) ||
(value instanceof Float)) {
result = getDecimalFormat(locale, pattern).format(((Number) value).doubleValue());
}
else if (value instanceof Date) { // java.util.Date, java.sql.Date, java.sql.Time, java.sql.Timestamp
SimpleDateFormat dateFormat =
new SimpleDateFormat(pattern, locale);
result = dateFormat.format(value);
}
else {
result = value.toString();
}
return result;
}
/**
* Make an instance of DecimalFormat.
*
* @param locale The locale
* @param pattern The pattern is used for the convertion
* @return The format for the locale and pattern
*
* @exception ConversionException if conversion cannot be performed
* successfully
* @throws ParseException if an error occurs parsing a String to a Number
*/
private DecimalFormat getDecimalFormat(Locale locale, String pattern) {
DecimalFormat numberFormat = (DecimalFormat) NumberFormat.getInstance(locale);
// if some constructors default pattern to null, it makes only sense to handle null pattern gracefully
if (pattern != null) {
if (locPattern) {
numberFormat.applyLocalizedPattern(pattern);
} else {
numberFormat.applyPattern(pattern);
}
} else {
log.debug("No pattern provided, using default.");
}
return numberFormat;
}
}
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