sss
/*
* Copyright 2002-2015 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.web.bind.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.springframework.core.annotation.AliasFor;
import org.springframework.http.HttpStatus;
/**
* Marks a method or exception class with the status {@link #code} and
* {@link #reason} that should be returned.
*
* <p>The status code is applied to the HTTP response when the handler
* method is invoked and overrides status information set by other means,
* like {@code ResponseEntity} or {@code "redirect:"}.
*
* <p><strong>Warning</strong>: when using this annotation on an exception
* class, or when setting the {@code reason} attribute of this annotation,
* the {@code HttpServletResponse.sendError} method will be used.
*
* <p>With {@code HttpServletResponse.sendError}, the response is considered
* complete and should not be written to any further. Furthermore, the Servlet
* container will typically write an HTML error page therefore making the
* use of a {@code reason} unsuitable for REST APIs. For such cases it is
* preferable to use a {@link org.springframework.http.ResponseEntity} as
* a return type and avoid the use of {@code @ResponseStatus} altogether.
*
* @author Arjen Poutsma
* @author Sam Brannen
* @see org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver
* @see javax.servlet.http.HttpServletResponse#sendError(int, String)
* @since 3.0
*/
@Target({ElementType.TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface ResponseStatus {
/**
* Alias for {@link #code}.
*/
@AliasFor("code")
HttpStatus value() default HttpStatus.INTERNAL_SERVER_ERROR;
/**
* The status <em>code</em> to use for the response.
* <p>Default is {@link HttpStatus#INTERNAL_SERVER_ERROR}, which should
* typically be changed to something more appropriate.
* @since 4.2
* @see javax.servlet.http.HttpServletResponse#setStatus(int)
* @see javax.servlet.http.HttpServletResponse#sendError(int)
*/
@AliasFor("value")
HttpStatus code() default HttpStatus.INTERNAL_SERVER_ERROR;
/**
* The <em>reason</em> to be used for the response.
* @see javax.servlet.http.HttpServletResponse#sendError(int, String)
*/
String reason() default "";
}
