001/*
002 * Copyright 2002-2017 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.format.datetime;
018
019import java.util.Calendar;
020import java.util.Collections;
021import java.util.Date;
022import java.util.HashSet;
023import java.util.Set;
024
025import org.springframework.context.support.EmbeddedValueResolutionSupport;
026import org.springframework.format.AnnotationFormatterFactory;
027import org.springframework.format.Formatter;
028import org.springframework.format.Parser;
029import org.springframework.format.Printer;
030import org.springframework.format.annotation.DateTimeFormat;
031import org.springframework.util.StringUtils;
032
033/**
034 * Formats fields annotated with the {@link DateTimeFormat} annotation using a {@link DateFormatter}.
035 *
036 * @author Phillip Webb
037 * @since 3.2
038 * @see org.springframework.format.datetime.joda.JodaDateTimeFormatAnnotationFormatterFactory
039 */
040public class DateTimeFormatAnnotationFormatterFactory  extends EmbeddedValueResolutionSupport
041                implements AnnotationFormatterFactory<DateTimeFormat> {
042
043        private static final Set<Class<?>> FIELD_TYPES;
044
045        static {
046                Set<Class<?>> fieldTypes = new HashSet<>(4);
047                fieldTypes.add(Date.class);
048                fieldTypes.add(Calendar.class);
049                fieldTypes.add(Long.class);
050                FIELD_TYPES = Collections.unmodifiableSet(fieldTypes);
051        }
052
053
054        @Override
055        public Set<Class<?>> getFieldTypes() {
056                return FIELD_TYPES;
057        }
058
059        @Override
060        public Printer<?> getPrinter(DateTimeFormat annotation, Class<?> fieldType) {
061                return getFormatter(annotation, fieldType);
062        }
063
064        @Override
065        public Parser<?> getParser(DateTimeFormat annotation, Class<?> fieldType) {
066                return getFormatter(annotation, fieldType);
067        }
068
069        protected Formatter<Date> getFormatter(DateTimeFormat annotation, Class<?> fieldType) {
070                DateFormatter formatter = new DateFormatter();
071                String style = resolveEmbeddedValue(annotation.style());
072                if (StringUtils.hasLength(style)) {
073                        formatter.setStylePattern(style);
074                }
075                formatter.setIso(annotation.iso());
076                String pattern = resolveEmbeddedValue(annotation.pattern());
077                if (StringUtils.hasLength(pattern)) {
078                        formatter.setPattern(pattern);
079                }
080                return formatter;
081        }
082
083}