/*
    * 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;
  
  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;
  
  /**
   * 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<Class<?>>(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();
  		formatter.setStylePattern(resolveEmbeddedValue(annotation.style()));
  		formatter.setIso(annotation.iso());
  		formatter.setPattern(resolveEmbeddedValue(annotation.pattern()));
  		return formatter;
  	}
  
  }