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package javax.servlet;
import java.util.*;
/**
* Interface through which a {@link Servlet} may be further configured.
*
* @since Servlet 3.0
*/
public interface ServletRegistration extends Registration {
/**
* Adds a servlet mapping with the given URL patterns for the Servlet
* represented by this ServletRegistration.
*
* <p>If any of the specified URL patterns are already mapped to a
* different Servlet, no updates will be performed.
*
* <p>If this method is called multiple times, each successive call
* adds to the effects of the former.
*
* @param urlPatterns the URL patterns of the servlet mapping
*
* @return the (possibly empty) Set of URL patterns that are already
* mapped to a different Servlet
*
* @throws IllegalArgumentException if <tt>urlPatterns</tt> is null
* or empty
* @throws IllegalStateException if the ServletContext from which this
* ServletRegistration was obtained has already been initialized
*/
public Set<String> addMapping(String... urlPatterns);
/**
* Gets the currently available mappings of the
* Servlet represented by this <code>ServletRegistration</code>.
*
* <p>Any changes to the returned <code>Collection</code> must not
* affect this <code>ServletRegistration</code>.
*
* @return a (possibly empty) <code>Collection</code> of the currently
* available mappings of the Servlet represented by this
* <code>ServletRegistration</code>
*/
public Collection<String> getMappings();
/**
* Gets the name of the runAs role of the Servlet represented by this
* <code>ServletRegistration</code>.
*
* @return the name of the runAs role, or null if the Servlet is
* configured to run as its caller
*/
public String getRunAsRole();
/**
* Interface through which a {@link Servlet} registered via one of the
* <tt>addServlet</tt> methods on {@link ServletContext} may be further
* configured.
*/
interface Dynamic extends ServletRegistration, Registration.Dynamic {
/**
* Sets the <code>loadOnStartup</code> priority on the Servlet
* represented by this dynamic ServletRegistration.
*
* <p>A <tt>loadOnStartup</tt> value of greater than or equal to
* zero indicates to the container the initialization priority of
* the Servlet. In this case, the container must instantiate and
* initialize the Servlet during the initialization phase of the
* ServletContext, that is, after it has invoked all of the
* ServletContextListener objects configured for the ServletContext
* at their {@link ServletContextListener#contextInitialized}
* method.
*
* <p>If <tt>loadOnStartup</tt> is a negative integer, the container
* is free to instantiate and initialize the Servlet lazily.
*
* <p>The default value for <tt>loadOnStartup</tt> is <code>-1</code>.
*
* <p>A call to this method overrides any previous setting.
*
* @param loadOnStartup the initialization priority of the Servlet
*
* @throws IllegalStateException if the ServletContext from which
* this ServletRegistration was obtained has already been initialized
*/
public void setLoadOnStartup(int loadOnStartup);
/**
* Sets the {@link ServletSecurityElement} to be applied to the
* mappings defined for this <code>ServletRegistration</code>.
*
* <p>This method applies to all mappings added to this
* <code>ServletRegistration</code> up until the point that the
* <code>ServletContext</code> from which it was obtained has been
* initialized.
*
* <p>If a URL pattern of this ServletRegistration is an exact target
* of a <code>security-constraint</code> that was established via
* the portable deployment descriptor, then this method does not
* change the <code>security-constraint</code> for that pattern,
* and the pattern will be included in the return value.
*
* <p>If a URL pattern of this ServletRegistration is an exact
* target of a security constraint that was established via the
* {@link javax.servlet.annotation.ServletSecurity} annotation
* or a previous call to this method, then this method replaces
* the security constraint for that pattern.
*
* <p>If a URL pattern of this ServletRegistration is neither the
* exact target of a security constraint that was established via
* the {@link javax.servlet.annotation.ServletSecurity} annotation
* or a previous call to this method, nor the exact target of a
* <code>security-constraint</code> in the portable deployment
* descriptor, then this method establishes the security constraint
* for that pattern from the argument
* <code>ServletSecurityElement</code>.
*
* @param constraint the {@link ServletSecurityElement} to be applied
* to the patterns mapped to this ServletRegistration
*
* @return the (possibly empty) Set of URL patterns that were already
* the exact target of a <code>security-constraint</code> that was
* established via the portable deployment descriptor. This method
* has no effect on the patterns included in the returned set
*
* @throws IllegalArgumentException if <tt>constraint</tt> is null
*
* @throws IllegalStateException if the {@link ServletContext} from
* which this <code>ServletRegistration</code> was obtained has
* already been initialized
*/
public Set<String> setServletSecurity(ServletSecurityElement constraint);
/**
* Sets the {@link MultipartConfigElement} to be applied to the
* mappings defined for this <code>ServletRegistration</code>. If this
* method is called multiple times, each successive call overrides the
* effects of the former.
*
* @param multipartConfig the {@link MultipartConfigElement} to be
* applied to the patterns mapped to the registration
*
* @throws IllegalArgumentException if <tt>multipartConfig</tt> is
* null
*
* @throws IllegalStateException if the {@link ServletContext} from
* which this ServletRegistration was obtained has already been
* initialized
*/
public void setMultipartConfig(
MultipartConfigElement multipartConfig);
/**
* Sets the name of the <code>runAs</code> role for this
* <code>ServletRegistration</code>.
*
* @param roleName the name of the <code>runAs</code> role
*
* @throws IllegalArgumentException if <tt>roleName</tt> is null
*
* @throws IllegalStateException if the {@link ServletContext} from
* which this ServletRegistration was obtained has already been
* initialized
*/
public void setRunAsRole(String roleName);
}
}