/*
* Copyright 2002-2018 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;
/**
* Annotation for mapping web requests onto methods in request-handling classes
* with flexible method signatures.
*
* <p>Both Spring MVC and Spring WebFlux support this annotation through a
* {@code RequestMappingHandlerMapping} and {@code RequestMappingHandlerAdapter}
* in their respective modules and package structure. For the exact list of
* supported handler method arguments and return types in each, please use the
* reference documentation links below:
* <ul>
* <li>Spring MVC
* <a href="https://docs.spring.io/spring/docs/current/spring-framework-reference/web.html#mvc-ann-arguments">Method Arguments</a>
* and
* <a href="https://docs.spring.io/spring/docs/current/spring-framework-reference/web.html#mvc-ann-return-types">Return Values</a>
* </li>
* <li>Spring WebFlux
* <a href="https://docs.spring.io/spring/docs/current/spring-framework-reference/web-reactive.html#webflux-ann-arguments">Method Arguments</a>
* and
* <a href="https://docs.spring.io/spring/docs/current/spring-framework-reference/web-reactive.html#webflux-ann-return-types">Return Values</a>
* </li>
* </ul>
*
* <p><strong>Note:</strong> This annotation can be used both at the class and
* at the method level. In most cases, at the method level applications will
* prefer to use one of the HTTP method specific variants
* {@link GetMapping @GetMapping}, {@link PostMapping @PostMapping},
* {@link PutMapping @PutMapping}, {@link DeleteMapping @DeleteMapping}, or
* {@link PatchMapping @PatchMapping}.</p>
*
* <p><b>NOTE:</b> When using controller interfaces (e.g. for AOP proxying),
* make sure to consistently put <i>all</i> your mapping annotations - such as
* {@code @RequestMapping} and {@code @SessionAttributes} - on
* the controller <i>interface</i> rather than on the implementation class.
*
* @author Juergen Hoeller
* @author Arjen Poutsma
* @author Sam Brannen
* @since 2.5
* @see GetMapping
* @see PostMapping
* @see PutMapping
* @see DeleteMapping
* @see PatchMapping
* @see org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter
* @see org.springframework.web.reactive.result.method.annotation.RequestMappingHandlerAdapter
*/
@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Mapping
public @interface RequestMapping {
/**
* Assign a name to this mapping.
* <p><b>Supported at the type level as well as at the method level!</b>
* When used on both levels, a combined name is derived by concatenation
* with "#" as separator.
* @see org.springframework.web.servlet.mvc.method.annotation.MvcUriComponentsBuilder
* @see org.springframework.web.servlet.handler.HandlerMethodMappingNamingStrategy
*/
String name() default "";
/**
* The primary mapping expressed by this annotation.
* <p>This is an alias for {@link #path}. For example
* {@code @RequestMapping("/foo")} is equivalent to
* {@code @RequestMapping(path="/foo")}.
* <p><b>Supported at the type level as well as at the method level!</b>
* When used at the type level, all method-level mappings inherit
* this primary mapping, narrowing it for a specific handler method.
*/
@AliasFor("path")
String[] value() default {};
/**
* The path mapping URIs (e.g. "/myPath.do").
* Ant-style path patterns are also supported (e.g. "/myPath/*.do").
* At the method level, relative paths (e.g. "edit.do") are supported
* within the primary mapping expressed at the type level.
* Path mapping URIs may contain placeholders (e.g. "/${connect}").
* <p><b>Supported at the type level as well as at the method level!</b>
* When used at the type level, all method-level mappings inherit
* this primary mapping, narrowing it for a specific handler method.
* @see org.springframework.web.bind.annotation.ValueConstants#DEFAULT_NONE
* @since 4.2
*/
@AliasFor("value")
String[] path() default {};
/**
* The HTTP request methods to map to, narrowing the primary mapping:
* GET, POST, HEAD, OPTIONS, PUT, PATCH, DELETE, TRACE.
* <p><b>Supported at the type level as well as at the method level!</b>
* When used at the type level, all method-level mappings inherit
* this HTTP method restriction (i.e. the type-level restriction
* gets checked before the handler method is even resolved).
*/
RequestMethod[] method() default {};
/**
* The parameters of the mapped request, narrowing the primary mapping.
* <p>Same format for any environment: a sequence of "myParam=myValue" style
* expressions, with a request only mapped if each such parameter is found
* to have the given value. Expressions can be negated by using the "!=" operator,
* as in "myParam!=myValue". "myParam" style expressions are also supported,
* with such parameters having to be present in the request (allowed to have
* any value). Finally, "!myParam" style expressions indicate that the
* specified parameter is <i>not</i> supposed to be present in the request.
* <p><b>Supported at the type level as well as at the method level!</b>
* When used at the type level, all method-level mappings inherit
* this parameter restriction (i.e. the type-level restriction
* gets checked before the handler method is even resolved).
* <p>Parameter mappings are considered as restrictions that are enforced at
* the type level. The primary path mapping (i.e. the specified URI value)
* still has to uniquely identify the target handler, with parameter mappings
* simply expressing preconditions for invoking the handler.
*/
String[] params() default {};
/**
* The headers of the mapped request, narrowing the primary mapping.
* <p>Same format for any environment: a sequence of "My-Header=myValue" style
* expressions, with a request only mapped if each such header is found
* to have the given value. Expressions can be negated by using the "!=" operator,
* as in "My-Header!=myValue". "My-Header" style expressions are also supported,
* with such headers having to be present in the request (allowed to have
* any value). Finally, "!My-Header" style expressions indicate that the
* specified header is <i>not</i> supposed to be present in the request.
* <p>Also supports media type wildcards (*), for headers such as Accept
* and Content-Type. For instance,
* <pre class="code">
* @RequestMapping(value = "/something", headers = "content-type=text/*")
* </pre>
* will match requests with a Content-Type of "text/html", "text/plain", etc.
* <p><b>Supported at the type level as well as at the method level!</b>
* When used at the type level, all method-level mappings inherit
* this header restriction (i.e. the type-level restriction
* gets checked before the handler method is even resolved).
* @see org.springframework.http.MediaType
*/
String[] headers() default {};
/**
* The consumable media types of the mapped request, narrowing the primary mapping.
* <p>The format is a single media type or a sequence of media types,
* with a request only mapped if the {@code Content-Type} matches one of these media types.
* Examples:
* <pre class="code">
* consumes = "text/plain"
* consumes = {"text/plain", "application/*"}
* </pre>
* Expressions can be negated by using the "!" operator, as in "!text/plain", which matches
* all requests with a {@code Content-Type} other than "text/plain".
* <p><b>Supported at the type level as well as at the method level!</b>
* When used at the type level, all method-level mappings override
* this consumes restriction.
* @see org.springframework.http.MediaType
* @see javax.servlet.http.HttpServletRequest#getContentType()
*/
String[] consumes() default {};
/**
* The producible media types of the mapped request, narrowing the primary mapping.
* <p>The format is a single media type or a sequence of media types,
* with a request only mapped if the {@code Accept} matches one of these media types.
* Examples:
* <pre class="code">
* produces = "text/plain"
* produces = {"text/plain", "application/*"}
* produces = MediaType.APPLICATION_JSON_UTF8_VALUE
* </pre>
* <p>It affects the actual content type written, for example to produce a JSON response
* with UTF-8 encoding, {@link org.springframework.http.MediaType#APPLICATION_JSON_UTF8_VALUE} should be used.
* <p>Expressions can be negated by using the "!" operator, as in "!text/plain", which matches
* all requests with a {@code Accept} other than "text/plain".
* <p><b>Supported at the type level as well as at the method level!</b>
* When used at the type level, all method-level mappings override
* this produces restriction.
* @see org.springframework.http.MediaType
*/
String[] produces() default {};
}
