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/*
* Copyright 2000-2014 Vaadin Ltd.
*
* 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 com.vaadin.ui.components.grid.renderers;
import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;
import com.vaadin.ui.components.grid.AbstractRenderer;
/**
* A renderer for presenting date values.
*
* @since
* @author Vaadin Ltd
*/
public class DateRenderer extends AbstractRenderer<Date> {
private final Locale locale;
private final String formatString;
private final DateFormat dateFormat;
/**
* Creates a new date renderer.
* <p>
* The renderer is configured to render with the {@link Date#toString()}
* representation for the default locale.
*/
public DateRenderer() {
this(Locale.getDefault());
}
/**
* Creates a new date renderer.
* <p>
* The renderer is configured to render with the {@link Date#toString()}
* representation for the given locale.
*
* @param locale
* the locale in which to present dates
* @throws IllegalArgumentException
* if {@code locale} is {@code null}
*/
public DateRenderer(Locale locale) throws IllegalArgumentException {
this("%s", locale);
}
/**
* Creates a new date renderer.
* <p>
* The renderer is configured to render with the given string format, as
* displayed in the default locale.
*
* @param formatString
* the format string with which to format the date
* @throws IllegalArgumentException
* if {@code formatString} is {@code null}
* @see <a
* href="http://docs.oracle.com/javase/7/docs/api/java/util/Formatter.html#syntax">Format
* String Syntax</a>
*/
public DateRenderer(String formatString) throws IllegalArgumentException {
this(formatString, Locale.getDefault());
}
/**
* Creates a new date renderer.
* <p>
* The renderer is configured to render with the given string format, as
* displayed in the given locale.
*
* @param formatString
* the format string to format the date with
* @param locale
* the locale to use
* @throws IllegalArgumentException
* if either argument is {@code null}
* @see <a
* href="http://docs.oracle.com/javase/7/docs/api/java/util/Formatter.html#syntax">Format
* String Syntax</a>
*/
public DateRenderer(String formatString, Locale locale)
throws IllegalArgumentException {
super(Date.class);
if (formatString == null) {
throw new IllegalArgumentException("format string may not be null");
}
if (locale == null) {
throw new IllegalArgumentException("locale may not be null");
}
this.locale = locale;
this.formatString = formatString;
dateFormat = null;
}
/**
* Creates a new date renderer.
* <p>
* The renderer is configured to render with he given date format.
*
* @param dateFormat
* the date format to use when rendering dates
* @throws IllegalArgumentException
* if {@code dateFormat} is {@code null}
*/
public DateRenderer(DateFormat dateFormat) throws IllegalArgumentException {
super(Date.class);
if (dateFormat == null) {
throw new IllegalArgumentException("date format may not be null");
}
locale = null;
formatString = null;
this.dateFormat = dateFormat;
}
@Override
public String encode(Date value) {
if (dateFormat != null) {
return dateFormat.format(value);
} else {
return String.format(locale, formatString, value);
}
}
@Override
public String toString() {
final String fieldInfo;
if (dateFormat != null) {
fieldInfo = "dateFormat: " + dateFormat.toString();
} else {
fieldInfo = "locale: " + locale + ", formatString: " + formatString;
}
return String.format("%s [%s]", getClass().getSimpleName(), fieldInfo);
}
}
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