javax.ws.rs.PathParam Maven / Gradle / Ivy
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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;
/**
* Binds the value of a URI template parameter or a path segment
* containing the template parameter to a resource method parameter, resource
* class field, or resource class
* bean property. The value is URL decoded unless this
* is disabled using the {@link Encoded @Encoded} annotation.
* A default value can be specified using the {@link DefaultValue @DefaultValue}
* annotation.
*
* The type of the annotated parameter, field or property must either:
*
* - Be {@link javax.ws.rs.core.PathSegment}, the value will be the final
* segment of the matching part of the path.
* See {@link javax.ws.rs.core.UriInfo} for a means of retrieving all request
* path segments.
* - Be {@code List
}, the
* value will be a list of {@code PathSegment} corresponding to the path
* segment(s) that matched the named template parameter.
* See {@link javax.ws.rs.core.UriInfo} for a means of retrieving all request
* path segments.
* - Be a primitive type.
* - Have a constructor that accepts a single String argument.
* - Have a static method named {@code valueOf} or {@code fromString}
* that accepts a single
* String argument (see, for example, {@link Integer#valueOf(String)}).
* - Have a registered implementation of {@link javax.ws.rs.ext.ParamConverterProvider}
* JAX-RS extension SPI that returns a {@link javax.ws.rs.ext.ParamConverter}
* instance capable of a "from string" conversion for the type.
*
*
* The injected value corresponds to the latest use (in terms of scope) of
* the path parameter. E.g. if a class and a sub-resource method are both
* annotated with a {@link Path @Path} containing the same URI template
* parameter, use of {@code @PathParam} on a sub-resource method parameter
* will bind the value matching URI template parameter in the method's
* {@code @Path} annotation.
*
* Because injection occurs at object creation time, use of this annotation
* on resource class fields and bean properties is only supported for the
* default per-request resource class lifecycle. Resource classes using
* other lifecycles should only use this annotation on resource method
* parameters.
*
* @author Paul Sandoz
* @author Marc Hadley
* @see Encoded @Encoded
* @see DefaultValue @DefaultValue
* @see javax.ws.rs.core.PathSegment
* @see javax.ws.rs.core.UriInfo
* @since 1.0
*/
@Target({ElementType.PARAMETER, ElementType.METHOD, ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface PathParam {
/**
* Defines the name of the URI template parameter whose value will be used
* to initialize the value of the annotated method parameter, class field or
* property. See {@link Path#value()} for a description of the syntax of
* template parameters.
*
* E.g. a class annotated with: {@code @Path("widgets/{id}")}
* can have methods annotated whose arguments are annotated
* with {@code @PathParam("id")}.
*/
String value();
}