spring MessageSourceResolvable 源码
spring MessageSourceResolvable 代码
文件路径：/spring-context/src/main/java/org/springframework/context/MessageSourceResolvable.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.context;
import org.springframework.lang.Nullable;
/**
* Interface for objects that are suitable for message resolution in a
* {@link MessageSource}.
*
* <p>Spring's own validation error classes implement this interface.
*
* @author Juergen Hoeller
* @see MessageSource#getMessage(MessageSourceResolvable, java.util.Locale)
* @see org.springframework.validation.ObjectError
* @see org.springframework.validation.FieldError
*/
@FunctionalInterface
public interface MessageSourceResolvable {
/**
* Return the codes to be used to resolve this message, in the order that
* they should get tried. The last code will therefore be the default one.
* @return a String array of codes which are associated with this message
*/
@Nullable
String[] getCodes();
/**
* Return the array of arguments to be used to resolve this message.
* <p>The default implementation simply returns {@code null}.
* @return an array of objects to be used as parameters to replace
* placeholders within the message text
* @see java.text.MessageFormat
*/
@Nullable
default Object[] getArguments() {
return null;
}
/**
* Return the default message to be used to resolve this message.
* <p>The default implementation simply returns {@code null}.
* Note that the default message may be identical to the primary
* message code ({@link #getCodes()}), which effectively enforces
* {@link org.springframework.context.support.AbstractMessageSource#setUseCodeAsDefaultMessage}
* for this particular message.
* @return the default message, or {@code null} if no default
*/
@Nullable
default String getDefaultMessage() {
return null;
}
}
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