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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   *
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010     *   http://www.apache.org/licenses/LICENSE-2.0                 *
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019    
020    package org.apache.james.jspf.policies;
021    
022    import org.apache.james.jspf.core.DNSLookupContinuation;
023    import org.apache.james.jspf.core.SPF1Constants;
024    import org.apache.james.jspf.core.SPFSession;
025    import org.apache.james.jspf.core.SPF1Record;
026    import org.apache.james.jspf.core.exceptions.NeutralException;
027    import org.apache.james.jspf.core.exceptions.NoneException;
028    import org.apache.james.jspf.core.exceptions.PermErrorException;
029    import org.apache.james.jspf.core.exceptions.TempErrorException;
030    import org.apache.james.jspf.terms.Modifier;
031    
032    /**
033     * Sets the result to NEUTRAL if no directive is found 
034     */
035    public class NeutralIfNotMatchPolicy implements PolicyPostFilter {
036        
037        private final class NeutralIfNotMatchModifier implements Modifier {
038            
039            /**
040             * @see org.apache.james.jspf.core.SPFChecker#checkSPF(org.apache.james.jspf.core.SPFSession)
041             */
042            public DNSLookupContinuation checkSPF(SPFSession spfData) throws PermErrorException, TempErrorException, NeutralException {
043                // If no match was found set the result to neutral
044                if (spfData.getCurrentResult() == null) {
045                    spfData.setCurrentResult(SPF1Constants.NEUTRAL);
046                }
047                return null;
048            }
049    
050            public String toString() {
051                return "defaultresult";
052            }
053    
054            /**
055             * (non-Javadoc)
056             * @see org.apache.james.jspf.terms.Modifier#enforceSingleInstance()
057             */
058                    public boolean enforceSingleInstance() {
059                            return false;
060                    }
061        }
062    
063        /**
064         * @see org.apache.james.jspf.policies.PolicyPostFilter#getSPFRecord(java.lang.String, org.apache.james.jspf.core.SPF1Record)
065         */
066        public SPF1Record getSPFRecord(String currentDomain, SPF1Record spfRecord) throws PermErrorException, TempErrorException, NoneException, NeutralException {
067            if (spfRecord == null) return null;
068            // Set the result to NEUTRAL if at least a directive is present and it didn't match
069            // Maybe we should simply append a "?all" at the end, as modifier
070            if (spfRecord.getDirectives().size() > 0) {
071                spfRecord.getModifiers().add(new NeutralIfNotMatchModifier());
072            }
073            return spfRecord;
074        }
075    }