org.apache.commons.beanutils.locale.converters.DateLocaleConverter Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
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/*
* 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 java.text.DateFormat;
import java.text.DateFormatSymbols;
import java.text.ParseException;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Locale;
import org.apache.commons.beanutils.ConversionException;
import org.apache.commons.beanutils.locale.BaseLocaleConverter;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Standard {@link org.apache.commons.beanutils.locale.LocaleConverter}
* implementation that converts an incoming
* locale-sensitive String into a java.util.Date object,
* optionally using a default value or throwing a
* {@link org.apache.commons.beanutils.ConversionException}
* if a conversion error occurs.
*
* @version $Id$
*/
public class DateLocaleConverter extends BaseLocaleConverter {
// ----------------------------------------------------- Instance Variables
/** All logging goes through this logger */
private final Log log = LogFactory.getLog(DateLocaleConverter.class);
/** Should the date conversion be lenient? */
boolean isLenient = false;
/**
* Default Pattern Characters
*
*/
private static final String DEFAULT_PATTERN_CHARS = DateLocaleConverter.initDefaultChars();
// ----------------------------------------------------------- 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 DateLocaleConverter() {
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 DateLocaleConverter(final 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 DateLocaleConverter(final 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 DateLocaleConverter(final Locale locale, final 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 DateLocaleConverter(final Locale locale, final 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 DateLocaleConverter(final Locale locale, final String pattern, final 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 DateLocaleConverter(final 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 DateLocaleConverter(final Object defaultValue, final 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 DateLocaleConverter(final Object defaultValue, final 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 DateLocaleConverter(final Object defaultValue, final Locale locale, final 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 DateLocaleConverter(final Object defaultValue, final Locale locale, final 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 DateLocaleConverter(final Object defaultValue, final Locale locale, final String pattern, final boolean locPattern) {
super(defaultValue, locale, pattern, locPattern);
}
// --------------------------------------------------------- Methods
/**
* Returns whether date formatting is lenient.
*
* @return true if the DateFormat used for formatting is lenient
* @see java.text.DateFormat#isLenient
*/
public boolean isLenient() {
return isLenient;
}
/**
* Specify whether or not date-time parsing should be lenient.
*
* @param lenient true if the DateFormat used for formatting should be lenient
* @see java.text.DateFormat#setLenient
*/
public void setLenient(final boolean lenient) {
isLenient = lenient;
}
// --------------------------------------------------------- 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 Date value
*
* @throws org.apache.commons.beanutils.ConversionException
* if conversion cannot be performed successfully
* @throws ParseException if an error occurs parsing
*/
@Override
protected Object parse(final Object value, String pattern) throws ParseException {
// Handle Date
if (value instanceof java.util.Date) {
return value;
}
// Handle Calendar
if (value instanceof java.util.Calendar) {
return ((java.util.Calendar)value).getTime();
}
if (locPattern) {
pattern = convertLocalizedPattern(pattern, locale);
}
// Create Formatter - use default if pattern is null
final DateFormat formatter = pattern == null ? DateFormat.getDateInstance(DateFormat.SHORT, locale)
: new SimpleDateFormat(pattern, locale);
formatter.setLenient(isLenient);
// Parse the Date
final ParsePosition pos = new ParsePosition(0);
final String strValue = value.toString();
final Object parsedValue = formatter.parseObject(strValue, pos);
if (pos.getErrorIndex() > -1) {
throw new ConversionException("Error parsing date '" + value +
"' at position="+ pos.getErrorIndex());
}
if (pos.getIndex() < strValue.length()) {
throw new ConversionException("Date '" + value +
"' contains unparsed characters from position=" + pos.getIndex());
}
return parsedValue;
}
/**
* Convert a pattern from a localized format to the default format.
*
* @param locale The locale
* @param localizedPattern The pattern in 'local' symbol format
* @return pattern in 'default' symbol format
*/
private String convertLocalizedPattern(final String localizedPattern, final Locale locale) {
if (localizedPattern == null) {
return null;
}
// Note that this is a little obtuse.
// However, it is the best way that anyone can come up with
// that works with some 1.4 series JVM.
// Get the symbols for the localized pattern
final DateFormatSymbols localizedSymbols = new DateFormatSymbols(locale);
final String localChars = localizedSymbols.getLocalPatternChars();
if (DEFAULT_PATTERN_CHARS.equals(localChars)) {
return localizedPattern;
}
// Convert the localized pattern to default
String convertedPattern = null;
try {
convertedPattern = convertPattern(localizedPattern,
localChars,
DEFAULT_PATTERN_CHARS);
} catch (final Exception ex) {
log.debug("Converting pattern '" + localizedPattern + "' for " + locale, ex);
}
return convertedPattern;
}
/**
* Converts a Pattern from one character set to another.
*/
private String convertPattern(final String pattern, final String fromChars, final String toChars) {
final StringBuilder converted = new StringBuilder();
boolean quoted = false;
for (int i = 0; i < pattern.length(); ++i) {
char thisChar = pattern.charAt(i);
if (quoted) {
if (thisChar == '\'') {
quoted = false;
}
} else {
if (thisChar == '\'') {
quoted = true;
} else if ((thisChar >= 'a' && thisChar <= 'z') ||
(thisChar >= 'A' && thisChar <= 'Z')) {
final int index = fromChars.indexOf(thisChar );
if (index == -1) {
throw new IllegalArgumentException(
"Illegal pattern character '" + thisChar + "'");
}
thisChar = toChars.charAt(index);
}
}
converted.append(thisChar);
}
if (quoted) {
throw new IllegalArgumentException("Unfinished quote in pattern");
}
return converted.toString();
}
/**
* This method is called at class initialization time to define the
* value for constant member DEFAULT_PATTERN_CHARS. All other methods needing
* this data should just read that constant.
*/
private static String initDefaultChars() {
final DateFormatSymbols defaultSymbols = new DateFormatSymbols(Locale.US);
return defaultSymbols.getLocalPatternChars();
}
}