001    /**
002     *
003     * Copyright 2003-2004 The Apache Software Foundation
004     *
005     *  Licensed under the Apache License, Version 2.0 (the "License");
006     *  you may not use this file except in compliance with the License.
007     *  You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     *  Unless required by applicable law or agreed to in writing, software
012     *  distributed under the License is distributed on an "AS IS" BASIS,
013     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     *  See the License for the specific language governing permissions and
015     *  limitations under the License.
016     */
017    
018    package org.apache.geronimo.system.logging.log4j;
019    
020    import org.apache.log4j.helpers.PatternConverter;
021    
022    /**
023     * A simple extension of the log4j pattern parser which adds support for the
024     * 'a' letter for a NamedNDC.
025     *
026     * @version $Rev: 355877 $ $Date: 2005-12-10 18:48:27 -0800 (Sat, 10 Dec 2005) $
027     */
028    public class PatternParser
029            extends org.apache.log4j.helpers.PatternParser {
030        public PatternParser(String pattern) {
031            super(pattern);
032        }
033    
034        protected void finalizeConverter(char c) {
035            PatternConverter pc = null;
036            switch (c) {
037                case 'a':
038                    String key = extractOption();
039                    pc = new NamedNDCConverter(formattingInfo, key);
040                    currentLiteral.setLength(0);
041                    break;
042                default:
043                    super.finalizeConverter(c);
044                    return;
045            }
046            addConverter(pc);
047        }
048    }