spring AnnotationFormatterFactory 源码
spring AnnotationFormatterFactory 代码
文件路径：/spring-context/src/main/java/org/springframework/format/AnnotationFormatterFactory.java
/*
* 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
*
* 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;
import java.lang.annotation.Annotation;
import java.util.Set;
/**
* A factory that creates formatters to format values of fields annotated with a particular
* {@link Annotation}.
*
* <p>For example, a {@code DateTimeFormatAnnotationFormatterFactory} might create a formatter
* that formats {@code Date} values set on fields annotated with {@code @DateTimeFormat}.
*
* @author Keith Donald
* @since 3.0
* @param <A> the annotation type that should trigger formatting
*/
public interface AnnotationFormatterFactory<A extends Annotation> {
/**
* The types of fields that may be annotated with the <A> annotation.
*/
Set<Class<?>> getFieldTypes();
/**
* Get the Printer to print the value of a field of {@code fieldType} annotated with
* {@code annotation}.
* <p>If the type T the printer accepts is not assignable to {@code fieldType}, a
* coercion from {@code fieldType} to T will be attempted before the Printer is invoked.
* @param annotation the annotation instance
* @param fieldType the type of field that was annotated
* @return the printer
*/
Printer<?> getPrinter(A annotation, Class<?> fieldType);
/**
* Get the Parser to parse a submitted value for a field of {@code fieldType}
* annotated with {@code annotation}.
* <p>If the object the parser returns is not assignable to {@code fieldType},
* a coercion to {@code fieldType} will be attempted before the field is set.
* @param annotation the annotation instance
* @param fieldType the type of field that was annotated
* @return the parser
*/
Parser<?> getParser(A annotation, Class<?> fieldType);
}
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