001/*
002 *  Copyright 2012 Anyware Services
003 *
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package org.ametys.core.servletwrapper.filter;
017
018import java.util.Enumeration;
019import java.util.Iterator;
020import java.util.Map;
021
022import javax.servlet.FilterConfig;
023import javax.servlet.ServletContext;
024
025/**
026 * The runtime filter configuration based on configuration parameters
027 */
028public class ServletFilterWrapperConfig implements FilterConfig
029{
030    private Map<String, String> _parameters;
031    
032    private ServletContext _servletContext;
033    
034    /**
035     * Creates a generic filter 
036     * @param map A hashmap of parameters 
037     * @param servlet A reference to the servlet context
038     * */
039    public ServletFilterWrapperConfig(ServletContext servlet, Map<String, String> map)
040    {
041        _parameters = map; 
042        _servletContext = servlet;
043    }
044    
045    /**
046     * Gets the servlet context 
047     */
048    public ServletContext getServletContext()
049    {
050        return _servletContext;
051    }
052    
053    /**
054     * Gets the filter name
055     */
056    public String getFilterName()
057    {
058        return "ServletFilterWrapper";
059    }
060
061    public String getInitParameter(String name)
062    {
063        return _parameters.get(name);
064    }
065
066    public Enumeration<String> getInitParameterNames()
067    {
068        return new IteratorEnumeration(_parameters.keySet().iterator());
069    }
070
071    /**
072     * An enumeration based on an iterator
073     */
074    public class IteratorEnumeration implements Enumeration<String>
075    {
076        private Iterator<String> _it;
077        
078        /**
079         * Create an enumeration from an iterator
080         * @param it The iterator to enumerate
081         */
082        public IteratorEnumeration (Iterator<String> it)
083        {
084            _it = it;
085        }
086
087        public boolean hasMoreElements()
088        {
089            return _it.hasNext();
090        }
091
092        public String nextElement()
093        {
094            return _it.next();
095        }
096    }
097}