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package javax.ws.rs;
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;
/**
* Identifies the URI path that a resource class or class method will serve requests for.
*
* Paths are relative. For an annotated class the base URI is the application path. For an
* annotated method the base URI is the effective URI of the containing class. For the purposes of
* absolutizing a path against the base URI , a leading '/' in a path is ignored and base URIs are
* treated as if they ended in '/'. E.g.:
*
*
@Path("widgets")
* public class WidgetsResource {
* @GET
* String getList() {...}
*
* @GET @Path("{id}")
* String getWidget(@PathParam("id") String id) {...}
* }
*
* In the above, if the application path is {@code catalogue} and the application is deployed at
* {@code http://example.com/}, then {@code GET} requests for {@code
* http://example.com/catalogue/widgets} will be handled by the {@code getList} method while
* requests for http://example.com/catalogue/widgets/nnn (where nnn
* is some value) will be handled by the {@code getWidget} method. The same would apply if
* the value of either {@code @Path} annotation started with '/'.
*
*
Classes and methods may also be annotated with {@link Consumes} and {@link Produces} to filter
* the requests they will receive.
*
* @author Paul Sandoz
* @author Marc Hadley
* @see Consumes
* @see Produces
* @since 1.0
*/
@Target({ElementType.TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Path {
/**
* Defines a URI template for the resource class or method, must not include matrix parameters.
*
*
Embedded template parameters are allowed and are of the form:
*
*
param = "{" *WSP name *WSP [ ":" *WSP regex *WSP ] "}"
* name = (ALPHA / DIGIT / "_")*(ALPHA / DIGIT / "." / "_" / "-" ) ; \w[\w\.-]*
* regex = *( nonbrace / "{" *nonbrace "}" ) ; where nonbrace is any char other than "{" and "}"
*
*
* See {@link RFC 5234} for a description of
* the syntax used above and the expansions of {@code WSP}, {@code ALPHA} and {@code DIGIT}. In
* the above {@code name} is the template parameter name and the optional {@code regex} specifies
* the contents of the capturing group for the parameter. If {@code regex} is not supplied then a
* default value of {@code [^/]+} which terminates at a path segment boundary, is used. Matching
* of request URIs to URI templates is performed against encoded path values and implementations
* will not escape literal characters in regex automatically, therefore any literals in {@code
* regex} should be escaped by the author according to the rules of {@link RFC 3986 section 3.3}. Caution is
* recommended in the use of {@code regex}, incorrect use can lead to a template parameter
* matching unexpected URI paths. See {@link Pattern}
* for further information on the syntax of regular expressions. Values of template parameters may
* be extracted using PathParam.
*
*
The literal part of the supplied value (those characters that are not part of a template
* parameter) is automatically percent encoded to conform to the {@code path} production of {@link
* RFC 3986 section 3.3}. Note that
* percent encoded values are allowed in the literal part of the value, an implementation will
* recognize such values and will not double encode the '%' character.
*/
String value();
}