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 020package org.apache.james.mime4j.message; 021 022import java.util.HashMap; 023import java.util.Locale; 024import java.util.Map; 025 026import org.apache.james.mime4j.MimeException; 027import org.apache.james.mime4j.codec.DecodeMonitor; 028import org.apache.james.mime4j.dom.FieldParser; 029import org.apache.james.mime4j.dom.field.ContentTypeField; 030import org.apache.james.mime4j.dom.field.FieldName; 031import org.apache.james.mime4j.dom.field.ParsedField; 032import org.apache.james.mime4j.field.DefaultFieldParser; 033import org.apache.james.mime4j.stream.BodyDescriptor; 034import org.apache.james.mime4j.stream.BodyDescriptorBuilder; 035import org.apache.james.mime4j.stream.Field; 036import org.apache.james.mime4j.stream.RawField; 037import org.apache.james.mime4j.util.MimeUtil; 038 039/** 040 * Default {@link BodyDescriptorBuilder} implementation. 041 */ 042public class DefaultBodyDescriptorBuilder implements BodyDescriptorBuilder { 043 044 private static final String CONTENT_TYPE = FieldName.CONTENT_TYPE.toLowerCase(Locale.US); 045 046 private static final String US_ASCII = "us-ascii"; 047 private static final String SUB_TYPE_EMAIL = "rfc822"; 048 private static final String MEDIA_TYPE_TEXT = "text"; 049 private static final String MEDIA_TYPE_MESSAGE = "message"; 050 private static final String EMAIL_MESSAGE_MIME_TYPE = MEDIA_TYPE_MESSAGE + "/" + SUB_TYPE_EMAIL; 051 private static final String DEFAULT_SUB_TYPE = "plain"; 052 private static final String DEFAULT_MEDIA_TYPE = MEDIA_TYPE_TEXT; 053 private static final String DEFAULT_MIME_TYPE = DEFAULT_MEDIA_TYPE + "/" + DEFAULT_SUB_TYPE; 054 055 private final String parentMimeType; 056 private final DecodeMonitor monitor; 057 private final FieldParser<? extends ParsedField> fieldParser; 058 private final Map<String, ParsedField> fields; 059 060 /** 061 * Creates a new root <code>BodyDescriptor</code> instance. 062 */ 063 public DefaultBodyDescriptorBuilder() { 064 this(null); 065 } 066 067 public DefaultBodyDescriptorBuilder(final String parentMimeType) { 068 this(parentMimeType, null, null); 069 } 070 071 /** 072 * Creates a new <code>BodyDescriptor</code> instance. 073 */ 074 public DefaultBodyDescriptorBuilder( 075 final String parentMimeType, 076 final FieldParser<? extends ParsedField> fieldParser, 077 final DecodeMonitor monitor) { 078 super(); 079 this.parentMimeType = parentMimeType; 080 this.fieldParser = fieldParser != null ? fieldParser : DefaultFieldParser.getParser(); 081 this.monitor = monitor != null ? monitor : DecodeMonitor.SILENT; 082 this.fields = new HashMap<String, ParsedField>(); 083 } 084 085 public void reset() { 086 fields.clear(); 087 } 088 089 public Field addField(final RawField rawfield) throws MimeException { 090 ParsedField field = fieldParser.parse(rawfield, monitor); 091 String name = field.getName().toLowerCase(Locale.US); 092 if (!fields.containsKey(name)) { 093 fields.put(name, field); 094 } 095 return field; 096 } 097 098 public BodyDescriptor build() { 099 String actualMimeType = null; 100 String actualMediaType = null; 101 String actualSubType = null; 102 String actualCharset = null; 103 String actualBoundary = null; 104 ContentTypeField contentTypeField = (ContentTypeField) fields.get(CONTENT_TYPE); 105 if (contentTypeField != null) { 106 actualMimeType = contentTypeField.getMimeType(); 107 actualMediaType = contentTypeField.getMediaType(); 108 actualSubType = contentTypeField.getSubType(); 109 actualCharset = contentTypeField.getCharset(); 110 actualBoundary = contentTypeField.getBoundary(); 111 } 112 if (actualMimeType == null) { 113 if (MimeUtil.isSameMimeType("multipart/digest", parentMimeType)) { 114 actualMimeType = EMAIL_MESSAGE_MIME_TYPE; 115 actualMediaType = MEDIA_TYPE_MESSAGE; 116 actualSubType = SUB_TYPE_EMAIL; 117 } else { 118 actualMimeType = DEFAULT_MIME_TYPE; 119 actualMediaType = DEFAULT_MEDIA_TYPE; 120 actualSubType = DEFAULT_SUB_TYPE; 121 } 122 } 123 if (actualCharset == null && MEDIA_TYPE_TEXT.equals(actualMediaType)) { 124 actualCharset = US_ASCII; 125 } 126 if (!MimeUtil.isMultipart(actualMimeType)) { 127 actualBoundary = null; 128 } 129 return new MaximalBodyDescriptor( 130 actualMimeType, actualMediaType, actualSubType, actualBoundary, actualCharset, 131 fields); 132 } 133 134 public BodyDescriptorBuilder newChild() { 135 String actualMimeType; 136 ContentTypeField contentTypeField = (ContentTypeField) fields.get(CONTENT_TYPE); 137 if (contentTypeField != null) { 138 actualMimeType = contentTypeField.getMimeType(); 139 } else { 140 if (MimeUtil.isSameMimeType("multipart/digest", parentMimeType)) { 141 actualMimeType = EMAIL_MESSAGE_MIME_TYPE; 142 } else { 143 actualMimeType = DEFAULT_MIME_TYPE; 144 } 145 } 146 return new DefaultBodyDescriptorBuilder(actualMimeType, fieldParser, monitor); 147 } 148 149}