javax.servlet.FilterConfig Maven / Gradle / Ivy
/*
* Copyright (c) 1997-2018 Oracle and/or its affiliates. All rights reserved.
* Copyright 2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
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();
}