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package javax.servlet;
import java.util.Enumeration;
/**
* A filter configuration object used by a servlet container
* to pass information to a filter during initialization.
*
* @see Filter
* @since Servlet 2.3
*/
public interface FilterConfig {
/**
* Returns the filter-name of this filter as defined in the deployment
* descriptor.
*
* @return the filter name of this filter
*/
public String getFilterName();
/**
* Returns a reference to the {@link ServletContext} in which the caller
* is executing.
*
* @return a {@link ServletContext} object, used by the caller to
* interact with its servlet container
*
* @see ServletContext
*/
public ServletContext getServletContext();
/**
* Returns a String containing the value of the
* named initialization parameter, or null if
* the initialization parameter does not exist.
*
* @param name a String specifying the name of the
* initialization parameter
*
* @return a String containing the value of the
* initialization parameter, or null if
* the initialization parameter does not exist
*/
public String getInitParameter(String name);
/**
* Returns the names of the filter's initialization parameters
* as an Enumeration of String objects,
* or an empty Enumeration if the filter has
* no initialization parameters.
*
* @return an Enumeration of String objects
* containing the names of the filter's initialization parameters
*/
public Enumeration getInitParameterNames();
}