spring NumberFormatAnnotationFormatterFactory 源码
spring NumberFormatAnnotationFormatterFactory 代码
文件路径：/spring-context/src/main/java/org/springframework/format/number/NumberFormatAnnotationFormatterFactory.java
/*
* 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.number;
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.NumberFormat;
import org.springframework.format.annotation.NumberFormat.Style;
import org.springframework.util.NumberUtils;
import org.springframework.util.StringUtils;
/**
* Formats fields annotated with the {@link NumberFormat} annotation.
*
* @author Keith Donald
* @author Juergen Hoeller
* @since 3.0
* @see NumberFormat
*/
public class NumberFormatAnnotationFormatterFactory extends EmbeddedValueResolutionSupport
implements AnnotationFormatterFactory<NumberFormat> {
@Override
public Set<Class<?>> getFieldTypes() {
return NumberUtils.STANDARD_NUMBER_TYPES;
}
@Override
public Printer<Number> getPrinter(NumberFormat annotation, Class<?> fieldType) {
return configureFormatterFrom(annotation);
}
@Override
public Parser<Number> getParser(NumberFormat annotation, Class<?> fieldType) {
return configureFormatterFrom(annotation);
}
private Formatter<Number> configureFormatterFrom(NumberFormat annotation) {
String pattern = resolveEmbeddedValue(annotation.pattern());
if (StringUtils.hasLength(pattern)) {
return new NumberStyleFormatter(pattern);
}
else {
Style style = annotation.style();
if (style == Style.CURRENCY) {
return new CurrencyStyleFormatter();
}
else if (style == Style.PERCENT) {
return new PercentStyleFormatter();
}
else {
return new NumberStyleFormatter();
}
}
}
}
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