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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
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package javax.servlet.annotation;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import javax.servlet.annotation.ServletSecurity.EmptyRoleSemantic;
import javax.servlet.annotation.ServletSecurity.TransportGuarantee;

/**
 * This annotation is used within the {@link ServletSecurity} annotation to
 * represent security constraints on specific HTTP protocol messages.
 *
 * @since Servlet 3.0
 */
@Documented
@Retention(RetentionPolicy.RUNTIME)
public @interface HttpMethodConstraint {

    /**
     * Http protocol method name
     *
     * @return the name of an HTTP protocol method. value
     * may not be null, or the empty string, and must be a
     * legitimate HTTP Method name as defined by RFC 2616.
     */
    String value();

    /**
     * The default authorization semantic.
     * This value is insignificant when rolesAllowed returns a
     * non-empty array, and should not be specified when a non-empty
     * array is specified for rolesAllowed.
     *
     * @return the {@link EmptyRoleSemantic} to be applied when
     * rolesAllowed returns an empty (that is, zero-length) array.
     */
    EmptyRoleSemantic emptyRoleSemantic() default EmptyRoleSemantic.PERMIT;

    /**
     * The data protection requirements (i.e., whether or not SSL/TLS is
     * required) that must be satisfied by the connections on which requests
     * arrive.
     *
     * @return the {@link TransportGuarantee}
     * indicating the data protection that must be provided by the connection.
     */
    TransportGuarantee transportGuarantee() default TransportGuarantee.NONE;

    /**
     * The names of the authorized roles.
     *
     * Duplicate role names appearing in rolesAllowed are insignificant and
     * may be discarded during runtime processing of the annotation. The String
     * "*" has no special meaning as a role name (should it occur in
     * rolesAllowed).
     *
     * @return an array of zero or more role names. When the array contains
     * zero elements, its meaning depends on the value returned by
     * emptyRoleSemantic. If emptyRoleSemantic returns
     * DENY, and rolesAllowed returns a zero length array,
     * access is to be denied independent of authentication state and identity.
     * Conversely, if emptyRoleSemantic returns
     * PERMIT, it indicates that access is to be allowed
     * independent of authentication state and identity. When the array
     * contains the names of one or more roles, it indicates that access is
     * contingent on membership in at least one of the named roles (independent
     * of the value returned by emptyRoleSemantic).
     */
    String[] rolesAllowed() default {};
}