/*
* 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.support;
import java.util.Set;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.context.EmbeddedValueResolverAware;
import org.springframework.core.convert.support.ConversionServiceFactory;
import org.springframework.format.AnnotationFormatterFactory;
import org.springframework.format.Formatter;
import org.springframework.format.FormatterRegistrar;
import org.springframework.format.FormatterRegistry;
import org.springframework.format.Parser;
import org.springframework.format.Printer;
import org.springframework.util.StringValueResolver;
/**
* A factory providing convenient access to a {@code FormattingConversionService}
* configured with converters and formatters for common types such as numbers and
* datetimes.
*
* <p>Additional converters and formatters can be registered declaratively through
* {@link #setConverters(Set)} and {@link #setFormatters(Set)}. Another option
* is to register converters and formatters in code by implementing the
* {@link FormatterRegistrar} interface. You can then configure provide the set
* of registrars to use through {@link #setFormatterRegistrars(Set)}.
*
* <p>A good example for registering converters and formatters in code is
* {@code JodaTimeFormatterRegistrar}, which registers a number of
* date-related formatters and converters. For a more detailed list of cases
* see {@link #setFormatterRegistrars(Set)}
*
* <p>Like all {@code FactoryBean} implementations, this class is suitable for
* use when configuring a Spring application context using Spring {@code <beans>}
* XML. When configuring the container with
* {@link org.springframework.context.annotation.Configuration @Configuration}
* classes, simply instantiate, configure and return the appropriate
* {@code FormattingConversionService} object from a
* {@link org.springframework.context.annotation.Bean @Bean} method.
*
* @author Keith Donald
* @author Juergen Hoeller
* @author Rossen Stoyanchev
* @author Chris Beams
* @since 3.0
*/
public class FormattingConversionServiceFactoryBean
implements FactoryBean<FormattingConversionService>, EmbeddedValueResolverAware, InitializingBean {
private Set<?> converters;
private Set<?> formatters;
private Set<FormatterRegistrar> formatterRegistrars;
private boolean registerDefaultFormatters = true;
private StringValueResolver embeddedValueResolver;
private FormattingConversionService conversionService;
/**
* Configure the set of custom converter objects that should be added.
* @param converters instances of any of the following:
* {@link org.springframework.core.convert.converter.Converter},
* {@link org.springframework.core.convert.converter.ConverterFactory},
* {@link org.springframework.core.convert.converter.GenericConverter}
*/
public void setConverters(Set<?> converters) {
this.converters = converters;
}
/**
* Configure the set of custom formatter objects that should be added.
* @param formatters instances of {@link Formatter} or {@link AnnotationFormatterFactory}
*/
public void setFormatters(Set<?> formatters) {
this.formatters = formatters;
}
/**
* <p>Configure the set of FormatterRegistrars to invoke to register
* Converters and Formatters in addition to those added declaratively
* via {@link #setConverters(Set)} and {@link #setFormatters(Set)}.
* <p>FormatterRegistrars are useful when registering multiple related
* converters and formatters for a formatting category, such as Date
* formatting. All types related needed to support the formatting
* category can be registered from one place.
* <p>FormatterRegistrars can also be used to register Formatters
* indexed under a specific field type different from its own <T>,
* or when registering a Formatter from a Printer/Parser pair.
* @see FormatterRegistry#addFormatterForFieldType(Class, Formatter)
* @see FormatterRegistry#addFormatterForFieldType(Class, Printer, Parser)
*/
public void setFormatterRegistrars(Set<FormatterRegistrar> formatterRegistrars) {
this.formatterRegistrars = formatterRegistrars;
}
/**
* Indicate whether default formatters should be registered or not.
* <p>By default, built-in formatters are registered. This flag can be used
* to turn that off and rely on explicitly registered formatters only.
* @see #setFormatters(Set)
* @see #setFormatterRegistrars(Set)
*/
public void setRegisterDefaultFormatters(boolean registerDefaultFormatters) {
this.registerDefaultFormatters = registerDefaultFormatters;
}
@Override
public void setEmbeddedValueResolver(StringValueResolver embeddedValueResolver) {
this.embeddedValueResolver = embeddedValueResolver;
}
@Override
public void afterPropertiesSet() {
this.conversionService = new DefaultFormattingConversionService(this.embeddedValueResolver, this.registerDefaultFormatters);
ConversionServiceFactory.registerConverters(this.converters, this.conversionService);
registerFormatters();
}
private void registerFormatters() {
if (this.formatters != null) {
for (Object formatter : this.formatters) {
if (formatter instanceof Formatter<?>) {
this.conversionService.addFormatter((Formatter<?>) formatter);
}
else if (formatter instanceof AnnotationFormatterFactory<?>) {
this.conversionService.addFormatterForFieldAnnotation((AnnotationFormatterFactory<?>) formatter);
}
else {
throw new IllegalArgumentException(
"Custom formatters must be implementations of Formatter or AnnotationFormatterFactory");
}
}
}
if (this.formatterRegistrars != null) {
for (FormatterRegistrar registrar : this.formatterRegistrars) {
registrar.registerFormatters(this.conversionService);
}
}
}
@Override
public FormattingConversionService getObject() {
return this.conversionService;
}
@Override
public Class<? extends FormattingConversionService> getObjectType() {
return FormattingConversionService.class;
}
@Override
public boolean isSingleton() {
return true;
}
}