001    /****************************************************************
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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,   *
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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    package org.apache.james.mime4j.codec;
021    
022    /**
023     * This class is used to drive how decoder/parser should deal with malformed
024     * and unexpected data.
025     *
026     * 2 basic implementations are provided:
027     * <ul>
028     * <li>{@link #STRICT} return "true" on any occurrence</li>
029     * <li>{@link #SILENT} ignores any problem</li>
030     * </ul>
031     */
032    public class DecodeMonitor {
033    
034        /**
035         * The STRICT monitor throws an exception on every event.
036         */
037        public static final DecodeMonitor STRICT = new DecodeMonitor() {
038    
039            @Override
040            public boolean warn(String error, String dropDesc) {
041                return true;
042            }
043    
044            @Override
045            public boolean isListening() {
046                return true;
047            }
048        };
049    
050        /**
051         * The SILENT monitor ignore requests.
052         */
053        public static final DecodeMonitor SILENT = new DecodeMonitor();
054    
055        public boolean warn(String error, String dropDesc) {
056            return false;
057        }
058    
059        public boolean isListening() {
060            return false;
061        }
062    
063    }