javax.servlet.Registration Maven / Gradle / Ivy
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package javax.servlet;
import java.util.Map;
import java.util.Set;
/**
* Interface through which a {@link Servlet} or {@link Filter} may be
* further configured.
*
* @since Servlet 3.0
*/
public interface Registration {
/**
* Gets the name of the Servlet or Filter that is represented by this
* Registration.
*
* @return the name of the Servlet or Filter that is represented by this
* Registration
*/
public String getName();
/**
* Gets the fully qualified class name of the Servlet or Filter that
* is represented by this Registration.
*
* @return the fully qualified class name of the Servlet or Filter
* that is represented by this Registration
*/
public String getClassName();
/**
* Sets the initialization parameter with the given name and value
* on the Servlet or Filter that is represented by this Registration.
*
* @param name the initialization parameter name
* @param value the initialization parameter value
*
* @return true if the update was successful, i.e., an initialization
* parameter with the given name did not already exist for the Servlet
* or Filter represented by this Registration, and false otherwise
*
* @throws IllegalStateException if the ServletContext from which this
* Registration was obtained has already been initialized
* @throws IllegalArgumentException if the given name or value is
* null
*/
public boolean setInitParameter(String name, String value);
/**
* Gets the value of the initialization parameter with the given name
* that will be used to initialize the Servlet or Filter represented
* by this Registration object.
*
* @param name the name of the initialization parameter whose value is
* requested
*
* @return the value of the initialization parameter with the given
* name, or null if no initialization parameter with the given
* name exists
*/
public String getInitParameter(String name);
/**
* Sets the given initialization parameters on the Servlet or Filter
* that is represented by this Registration.
*
* The given map of initialization parameters is processed
* by-value, i.e., for each initialization parameter contained
* in the map, this method calls {@link #setInitParameter(String,String)}.
* If that method would return false for any of the
* initialization parameters in the given map, no updates will be
* performed, and false will be returned. Likewise, if the map contains
* an initialization parameter with a null name or value, no
* updates will be performed, and an IllegalArgumentException will be
* thrown.
*
* @param initParameters the initialization parameters
*
* @return the (possibly empty) Set of initialization parameter names
* that are in conflict
*
* @throws IllegalStateException if the ServletContext from which this
* Registration was obtained has already been initialized
* @throws IllegalArgumentException if the given map contains an
* initialization parameter with a null name or value
*/
public Set setInitParameters(Map initParameters);
/**
* Gets an immutable (and possibly empty) Map containing the
* currently available initialization parameters that will be used to
* initialize the Servlet or Filter represented by this Registration
* object.
*
* @return Map containing the currently available initialization
* parameters that will be used to initialize the Servlet or Filter
* represented by this Registration object
*/
public Map getInitParameters();
/**
* Interface through which a {@link Servlet} or {@link Filter} registered
* via one of the addServlet or addFilter methods,
* respectively, on {@link ServletContext} may be further configured.
*/
interface Dynamic extends Registration {
/**
* Sets the description on the Servlet or Filter represented by
* this dynamic Registration.
*
* A call to this method overrides any previous setting.
*
* @param description the description of the servlet
*
* @throws IllegalStateException if the ServletContext from which
* this dynamic Registration was obtained has already been initialized
*/
public void setDescription(String description);
/**
* Configures the Servlet or Filter represented by this dynamic
* Registration as supporting asynchronous operations or not.
*
*
By default, servlet and filters do not support asynchronous
* operations.
*
*
A call to this method overrides any previous setting.
*
* @param isAsyncSupported true if the Servlet or Filter represented
* by this dynamic Registration supports asynchronous operations,
* false otherwise
*
* @throws IllegalStateException if the ServletContext from which
* this dynamic Registration was obtained has already been
* initialized
*/
public void setAsyncSupported(boolean isAsyncSupported);
}
}