/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.io.
Serializable;
import java.util.
Enumeration;
public abstract class
GenericFilter implements
Filter,
FilterConfig,
Serializable {
private static final long
serialVersionUID = 1L;
private volatile
FilterConfig filterConfig;
@
Override
public
String getInitParameter(
String name) {
return
getFilterConfig().
getInitParameter(
name);
}
@
Override
public
Enumeration<
String>
getInitParameterNames() {
return
getFilterConfig().
getInitParameterNames();
}
/**
* Obtain the FilterConfig used to initialise this Filter instance.
*
* @return The config previously passed to the {@link #init(FilterConfig)}
* method
*/
public
FilterConfig getFilterConfig() {
return
filterConfig;
}
@
Override
public
ServletContext getServletContext() {
return
getFilterConfig().
getServletContext();
}
@
Override
public void
init(
FilterConfig filterConfig) throws
ServletException {
this.
filterConfig =
filterConfig;
init();
}
/**
* Convenience method for sub-classes to save them having to call
* <code>super.init(config)</code>. This is a NO-OP by default.
*
* @throws ServletException If an exception occurs that interrupts the
* Filter's normal operation
*/
public void
init() throws
ServletException {
// NO-OP
}
@
Override
public
String getFilterName() {
return
getFilterConfig().
getFilterName();
}
}