/*
* Copyright 2002-2014 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.standard;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.OffsetDateTime;
import java.time.OffsetTime;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.temporal.TemporalAccessor;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import org.springframework.context.support.EmbeddedValueResolutionSupport;
import org.springframework.format.AnnotationFormatterFactory;
import org.springframework.format.Parser;
import org.springframework.format.Printer;
import org.springframework.format.annotation.DateTimeFormat;
/**
* Formats fields annotated with the {@link DateTimeFormat} annotation using the
* JSR-310 <code>java.time</code> package in JDK 8.
*
* @author Juergen Hoeller
* @since 4.0
* @see org.springframework.format.annotation.DateTimeFormat
*/
public class Jsr310DateTimeFormatAnnotationFormatterFactory extends EmbeddedValueResolutionSupport
implements AnnotationFormatterFactory<DateTimeFormat> {
private static final Set<Class<?>> FIELD_TYPES;
static {
// Create the set of field types that may be annotated with @DateTimeFormat.
Set<Class<?>> fieldTypes = new HashSet<Class<?>>(8);
fieldTypes.add(LocalDate.class);
fieldTypes.add(LocalTime.class);
fieldTypes.add(LocalDateTime.class);
fieldTypes.add(ZonedDateTime.class);
fieldTypes.add(OffsetDateTime.class);
fieldTypes.add(OffsetTime.class);
FIELD_TYPES = Collections.unmodifiableSet(fieldTypes);
}
@Override
public final Set<Class<?>> getFieldTypes() {
return FIELD_TYPES;
}
@Override
public Printer<?> getPrinter(DateTimeFormat annotation, Class<?> fieldType) {
DateTimeFormatter formatter = getFormatter(annotation, fieldType);
return new TemporalAccessorPrinter(formatter);
}
@Override
@SuppressWarnings("unchecked")
public Parser<?> getParser(DateTimeFormat annotation, Class<?> fieldType) {
DateTimeFormatter formatter = getFormatter(annotation, fieldType);
return new TemporalAccessorParser((Class<? extends TemporalAccessor>) fieldType, formatter);
}
/**
* Factory method used to create a {@link DateTimeFormatter}.
* @param annotation the format annotation for the field
* @param fieldType the type of field
* @return a {@link DateTimeFormatter} instance
*/
protected DateTimeFormatter getFormatter(DateTimeFormat annotation, Class<?> fieldType) {
DateTimeFormatterFactory factory = new DateTimeFormatterFactory();
factory.setStylePattern(resolveEmbeddedValue(annotation.style()));
factory.setIso(annotation.iso());
factory.setPattern(resolveEmbeddedValue(annotation.pattern()));
return factory.createDateTimeFormatter();
}
}