1 | /**************************************************************** |
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2 | * Licensed to the Apache Software Foundation (ASF) under one * |
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3 | * or more contributor license agreements. See the NOTICE file * |
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4 | * distributed with this work for additional information * |
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5 | * regarding copyright ownership. The ASF licenses this file * |
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6 | * to you under the Apache License, Version 2.0 (the * |
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7 | * "License"); you may not use this file except in compliance * |
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8 | * with the License. You may obtain a copy of the License at * |
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9 | * * |
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10 | * http://www.apache.org/licenses/LICENSE-2.0 * |
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11 | * * |
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12 | * Unless required by applicable law or agreed to in writing, * |
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13 | * software distributed under the License is distributed on an * |
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14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * |
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15 | * KIND, either express or implied. See the License for the * |
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16 | * specific language governing permissions and limitations * |
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17 | * under the License. * |
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18 | ****************************************************************/ |
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19 | |
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20 | package org.apache.james.mime4j.field; |
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21 | |
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22 | import java.util.HashMap; |
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23 | import java.util.Map; |
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24 | |
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25 | import org.apache.james.mime4j.codec.DecodeMonitor; |
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26 | import org.apache.james.mime4j.dom.field.ParsedField; |
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27 | import org.apache.james.mime4j.util.ByteSequence; |
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28 | |
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29 | public class DelegatingFieldParser implements FieldParser<ParsedField> { |
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30 | private static final FieldParser<UnstructuredFieldImpl> DEFAULT_PARSER = UnstructuredFieldImpl.PARSER; |
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31 | |
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32 | private Map<String, FieldParser<? extends ParsedField>> parsers = new HashMap<String, FieldParser<? extends ParsedField>>(); |
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33 | |
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34 | /** |
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35 | * Sets the parser used for the field named <code>name</code>. |
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36 | * @param name the name of the field |
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37 | * @param parser the parser for fields named <code>name</code> |
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38 | */ |
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39 | public void setFieldParser(final String name, final FieldParser<? extends ParsedField> parser) { |
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40 | parsers.put(name.toLowerCase(), parser); |
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41 | } |
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42 | |
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43 | public FieldParser<? extends ParsedField> getParser(final String name) { |
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44 | final FieldParser<? extends ParsedField> field = parsers.get(name.toLowerCase()); |
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45 | if (field == null) { |
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46 | return DEFAULT_PARSER; |
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47 | } |
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48 | return field; |
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49 | } |
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50 | |
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51 | public ParsedField parse(final String name, final String body, final ByteSequence raw, DecodeMonitor monitor) { |
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52 | final FieldParser<? extends ParsedField> parser = getParser(name); |
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53 | return parser.parse(name, body, raw, monitor); |
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54 | } |
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55 | } |
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