/*
* Copyright 2002-2010 the original author or authors.
*
* 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.springframework.format.datetime.joda;
import java.util.Calendar;
import java.util.Collections;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;
import org.joda.time.DateTime;
import org.joda.time.LocalDate;
import org.joda.time.LocalDateTime;
import org.joda.time.LocalTime;
import org.joda.time.ReadableInstant;
import org.joda.time.ReadablePartial;
import org.joda.time.format.DateTimeFormatter;
import org.springframework.context.EmbeddedValueResolverAware;
import org.springframework.format.AnnotationFormatterFactory;
import org.springframework.format.Parser;
import org.springframework.format.Printer;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.format.annotation.DateTimeFormat.ISO;
import org.springframework.util.StringUtils;
import org.springframework.util.StringValueResolver;
/**
* Formats fields annotated with the {@link DateTimeFormat} annotation.
*
* @author Keith Donald
* @author Juergen Hoeller
* @since 3.0
* @see DateTimeFormat
*/
public class JodaDateTimeFormatAnnotationFormatterFactory
implements AnnotationFormatterFactory<DateTimeFormat>, EmbeddedValueResolverAware {
private final Set<Class<?>> fieldTypes;
private StringValueResolver embeddedValueResolver;
public JodaDateTimeFormatAnnotationFormatterFactory() {
this.fieldTypes = createFieldTypes();
}
public final Set<Class<?>> getFieldTypes() {
return this.fieldTypes;
}
public void setEmbeddedValueResolver(StringValueResolver resolver) {
this.embeddedValueResolver = resolver;
}
protected String resolveEmbeddedValue(String value) {
return (this.embeddedValueResolver != null ? this.embeddedValueResolver.resolveStringValue(value) : value);
}
public Printer<?> getPrinter(DateTimeFormat annotation, Class<?> fieldType) {
DateTimeFormatter formatter = configureDateTimeFormatterFrom(annotation);
if (ReadableInstant.class.isAssignableFrom(fieldType)) {
return new ReadableInstantPrinter(formatter);
}
else if (ReadablePartial.class.isAssignableFrom(fieldType)) {
return new ReadablePartialPrinter(formatter);
}
else if (Calendar.class.isAssignableFrom(fieldType)) {
// assumes Calendar->ReadableInstant converter is registered
return new ReadableInstantPrinter(formatter);
}
else {
// assumes Date->Long converter is registered
return new MillisecondInstantPrinter(formatter);
}
}
public Parser<DateTime> getParser(DateTimeFormat annotation, Class<?> fieldType) {
return new DateTimeParser(configureDateTimeFormatterFrom(annotation));
}
// internal helpers
/**
* Create the set of field types that may be annotated with @DateTimeFormat.
* Note: the 3 ReadablePartial concrete types are registered explicitly since addFormatterForFieldType rules exist for each of these types
* (if we did not do this, the default byType rules for LocalDate, LocalTime, and LocalDateTime would take precedence over the annotation rule, which is not what we want)
* @see JodaTimeFormatterRegistrar#registerFormatters(org.springframework.format.FormatterRegistry)
*/
private Set<Class<?>> createFieldTypes() {
Set<Class<?>> rawFieldTypes = new HashSet<Class<?>>(7);
rawFieldTypes.add(ReadableInstant.class);
rawFieldTypes.add(LocalDate.class);
rawFieldTypes.add(LocalTime.class);
rawFieldTypes.add(LocalDateTime.class);
rawFieldTypes.add(Date.class);
rawFieldTypes.add(Calendar.class);
rawFieldTypes.add(Long.class);
return Collections.unmodifiableSet(rawFieldTypes);
}
private DateTimeFormatter configureDateTimeFormatterFrom(DateTimeFormat annotation) {
if (StringUtils.hasLength(annotation.pattern())) {
return forPattern(resolveEmbeddedValue(annotation.pattern()));
}
else if (annotation.iso() != ISO.NONE) {
return forIso(annotation.iso());
}
else {
return forStyle(resolveEmbeddedValue(annotation.style()));
}
}
private DateTimeFormatter forPattern(String pattern) {
return org.joda.time.format.DateTimeFormat.forPattern(pattern);
}
private DateTimeFormatter forStyle(String style) {
return org.joda.time.format.DateTimeFormat.forStyle(style);
}
private DateTimeFormatter forIso(ISO iso) {
if (iso == ISO.DATE) {
return org.joda.time.format.ISODateTimeFormat.date();
}
else if (iso == ISO.TIME) {
return org.joda.time.format.ISODateTimeFormat.time();
}
else {
return org.joda.time.format.ISODateTimeFormat.dateTime();
}
}
}