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package javax.servlet;

import java.util.Enumeration;

/**
 * A servlet configuration object used by a servlet container
 * to pass information to a servlet during initialization. 
 */
 public interface ServletConfig {
    
    /**
     * Returns the name of this servlet instance.
     * The name may be provided via server administration, assigned in the 
     * web application deployment descriptor, or for an unregistered (and thus
     * unnamed) servlet instance it will be the servlet's class name.
     *
     * @return	the name of the servlet instance
     */
    public String getServletName();


    /**
     * 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();

    
    /**
     * Gets the value of the initialization parameter with the given name.
     *
     * @param name the name of the initialization parameter whose value to
     * get
     *
     * @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 servlet's initialization parameters
     * as an Enumeration of String objects, 
     * or an empty Enumeration if the servlet has
     * no initialization parameters.
     *
     * @return an Enumeration of String 
     * objects containing the names of the servlet's 
     * initialization parameters
     */
    public Enumeration getInitParameterNames();

}