org.springframework.format.datetime.DateTimeFormatAnnotationFormatterFactory.java Source code

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Here is the source code for org.springframework.format.datetime.DateTimeFormatAnnotationFormatterFactory.java

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/*
 * Copyright 2002-2017 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
 *
 *      https://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;

import java.util.Calendar;
import java.util.Collections;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;

import org.springframework.context.support.EmbeddedValueResolutionSupport;
import org.springframework.format.AnnotationFormatterFactory;
import org.springframework.format.Formatter;
import org.springframework.format.Parser;
import org.springframework.format.Printer;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.util.StringUtils;

/**
 * Formats fields annotated with the {@link DateTimeFormat} annotation using a {@link DateFormatter}.
 *
 * @author Phillip Webb
 * @since 3.2
 * @see org.springframework.format.datetime.joda.JodaDateTimeFormatAnnotationFormatterFactory
 */
public class DateTimeFormatAnnotationFormatterFactory extends EmbeddedValueResolutionSupport
        implements AnnotationFormatterFactory<DateTimeFormat> {

    private static final Set<Class<?>> FIELD_TYPES;

    static {
        Set<Class<?>> fieldTypes = new HashSet<>(4);
        fieldTypes.add(Date.class);
        fieldTypes.add(Calendar.class);
        fieldTypes.add(Long.class);
        FIELD_TYPES = Collections.unmodifiableSet(fieldTypes);
    }

    @Override
    public Set<Class<?>> getFieldTypes() {
        return FIELD_TYPES;
    }

    @Override
    public Printer<?> getPrinter(DateTimeFormat annotation, Class<?> fieldType) {
        return getFormatter(annotation, fieldType);
    }

    @Override
    public Parser<?> getParser(DateTimeFormat annotation, Class<?> fieldType) {
        return getFormatter(annotation, fieldType);
    }

    protected Formatter<Date> getFormatter(DateTimeFormat annotation, Class<?> fieldType) {
        DateFormatter formatter = new DateFormatter();
        String style = resolveEmbeddedValue(annotation.style());
        if (StringUtils.hasLength(style)) {
            formatter.setStylePattern(style);
        }
        formatter.setIso(annotation.iso());
        String pattern = resolveEmbeddedValue(annotation.pattern());
        if (StringUtils.hasLength(pattern)) {
            formatter.setPattern(pattern);
        }
        return formatter;
    }

}