001    /****************************************************************
002     * Licensed to the Apache Software Foundation (ASF) under one   *
003     * or more contributor license agreements.  See the NOTICE file *
004     * distributed with this work for additional information        *
005     * regarding copyright ownership.  The ASF licenses this file   *
006     * to you under the Apache License, Version 2.0 (the            *
007     * "License"); you may not use this file except in compliance   *
008     * with the License.  You may obtain a copy of the License at   *
009     *                                                              *
010     *   http://www.apache.org/licenses/LICENSE-2.0                 *
011     *                                                              *
012     * Unless required by applicable law or agreed to in writing,   *
013     * software distributed under the License is distributed on an  *
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
015     * KIND, either express or implied.  See the License for the    *
016     * specific language governing permissions and limitations      *
017     * under the License.                                           *
018     ****************************************************************/
019    
020    
021    package org.apache.james.jspf.terms;
022    
023    import org.apache.james.jspf.core.DNSLookupContinuation;
024    import org.apache.james.jspf.core.SPFSession;
025    import org.apache.james.jspf.core.SPFTermsRegexps;
026    import org.apache.james.jspf.core.exceptions.PermErrorException;
027    
028    /**
029     * This Class represent an Unknown Modifier
030     * 
031     */
032    public class UnknownModifier implements Modifier, ConfigurationEnabled {
033    
034        /**
035         * ABNF: name = ALPHA *( ALPHA / DIGIT / "-" / "_" / "." ) ABNF:
036         * unknown-modifier = name "=" macro-string
037         */
038        public static final String REGEX = "(" + SPFTermsRegexps.ALPHA_PATTERN + "{1}"
039                + "[A-Za-z0-9\\-\\_\\.]*" + ")" + "\\=("
040                + SPFTermsRegexps.MACRO_STRING_REGEX + ")";
041    
042        /**
043         * @see org.apache.james.jspf.core.SPFChecker#checkSPF(org.apache.james.jspf.core.SPFSession)
044         */
045        public DNSLookupContinuation checkSPF(SPFSession spfData) throws PermErrorException {
046            return null;
047        }
048    
049        /**
050         * @see org.apache.james.jspf.terms.Modifier#enforceSingleInstance()
051         */
052        public boolean enforceSingleInstance() {
053            return false;
054        }
055    
056        /**
057         * @see org.apache.james.jspf.terms.ConfigurationEnabled#config(org.apache.james.jspf.terms.Configuration)
058         */
059        public synchronized void config(Configuration params) throws PermErrorException {
060            if (params.groupCount() >= 2 && params.group(1) != null) {
061                String name = params.group(1).toLowerCase();
062                if ("exp".equals(name) || "redirect".equals(name)) {
063                    throw new PermErrorException("exp and redirect are not valid names for unknown modifier: this probably means an invalid syntax for exp or redirect fallback to the unkown modifier.");
064                }
065            }
066        }
067    
068    }