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.io.StringReader; |
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23 | import java.util.Collections; |
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24 | import java.util.HashMap; |
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25 | import java.util.List; |
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26 | import java.util.Map; |
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27 | |
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28 | import org.apache.james.mime4j.codec.DecodeMonitor; |
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29 | import org.apache.james.mime4j.dom.field.ContentTypeField; |
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30 | import org.apache.james.mime4j.field.contenttype.parser.ContentTypeParser; |
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31 | import org.apache.james.mime4j.field.contenttype.parser.ParseException; |
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32 | import org.apache.james.mime4j.field.contenttype.parser.TokenMgrError; |
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33 | import org.apache.james.mime4j.util.ByteSequence; |
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34 | |
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35 | /** |
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36 | * Represents a <code>Content-Type</code> field. |
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37 | */ |
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38 | public class ContentTypeFieldImpl extends AbstractField implements ContentTypeField { |
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39 | private boolean parsed = false; |
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40 | |
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41 | private String mimeType = ""; |
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42 | private Map<String, String> parameters = new HashMap<String, String>(); |
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43 | private ParseException parseException; |
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44 | |
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45 | ContentTypeFieldImpl(String name, String body, ByteSequence raw, DecodeMonitor monitor) { |
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46 | super(name, body, raw, monitor); |
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47 | } |
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48 | |
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49 | /** |
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50 | * @see org.apache.james.mime4j.dom.field.ContentTypeField#getParseException() |
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51 | */ |
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52 | @Override |
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53 | public ParseException getParseException() { |
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54 | if (!parsed) |
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55 | parse(); |
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56 | |
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57 | return parseException; |
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58 | } |
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59 | |
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60 | /** |
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61 | * @see org.apache.james.mime4j.dom.field.ContentTypeField#getMimeType() |
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62 | */ |
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63 | public String getMimeType() { |
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64 | if (!parsed) |
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65 | parse(); |
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66 | |
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67 | return mimeType; |
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68 | } |
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69 | |
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70 | /** |
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71 | * @see org.apache.james.mime4j.dom.field.ContentTypeField#getParameter(java.lang.String) |
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72 | */ |
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73 | public String getParameter(String name) { |
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74 | if (!parsed) |
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75 | parse(); |
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76 | |
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77 | return parameters.get(name.toLowerCase()); |
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78 | } |
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79 | |
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80 | /** |
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81 | * @see org.apache.james.mime4j.dom.field.ContentTypeField#getParameters() |
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82 | */ |
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83 | public Map<String, String> getParameters() { |
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84 | if (!parsed) |
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85 | parse(); |
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86 | |
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87 | return Collections.unmodifiableMap(parameters); |
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88 | } |
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89 | |
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90 | /** |
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91 | * @see org.apache.james.mime4j.dom.field.ContentTypeField#isMimeType(java.lang.String) |
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92 | */ |
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93 | public boolean isMimeType(String mimeType) { |
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94 | if (!parsed) |
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95 | parse(); |
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96 | |
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97 | return this.mimeType.equalsIgnoreCase(mimeType); |
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98 | } |
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99 | |
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100 | /** |
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101 | * @see org.apache.james.mime4j.dom.field.ContentTypeField#isMultipart() |
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102 | */ |
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103 | public boolean isMultipart() { |
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104 | if (!parsed) |
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105 | parse(); |
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106 | |
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107 | return mimeType.startsWith(TYPE_MULTIPART_PREFIX); |
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108 | } |
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109 | |
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110 | /** |
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111 | * @see org.apache.james.mime4j.dom.field.ContentTypeField#getBoundary() |
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112 | */ |
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113 | public String getBoundary() { |
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114 | return getParameter(PARAM_BOUNDARY); |
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115 | } |
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116 | |
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117 | /** |
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118 | * @see org.apache.james.mime4j.dom.field.ContentTypeField#getCharset() |
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119 | */ |
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120 | public String getCharset() { |
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121 | return getParameter(PARAM_CHARSET); |
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122 | } |
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123 | |
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124 | /** |
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125 | * Gets the MIME type defined in the child's Content-Type field or derives a |
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126 | * MIME type from the parent if child is <code>null</code> or hasn't got a |
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127 | * MIME type value set. If child's MIME type is multipart but no boundary |
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128 | * has been set the MIME type of child will be derived from the parent. |
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129 | * |
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130 | * @param child |
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131 | * the child. |
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132 | * @param parent |
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133 | * the parent. |
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134 | * @return the MIME type. |
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135 | */ |
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136 | public static String getMimeType(ContentTypeField child, |
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137 | ContentTypeField parent) { |
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138 | if (child == null || child.getMimeType().length() == 0 |
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139 | || child.isMultipart() && child.getBoundary() == null) { |
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140 | |
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141 | if (parent != null && parent.isMimeType(TYPE_MULTIPART_DIGEST)) { |
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142 | return TYPE_MESSAGE_RFC822; |
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143 | } else { |
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144 | return TYPE_TEXT_PLAIN; |
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145 | } |
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146 | } |
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147 | |
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148 | return child.getMimeType(); |
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149 | } |
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150 | |
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151 | /** |
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152 | * Gets the value of the <code>charset</code> parameter if set for the |
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153 | * given field. Returns the default <code>us-ascii</code> if not set or if |
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154 | * <code>f</code> is <code>null</code>. |
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155 | * |
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156 | * @return the <code>charset</code> parameter value. |
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157 | */ |
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158 | public static String getCharset(ContentTypeField f) { |
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159 | if (f != null) { |
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160 | String charset = f.getCharset(); |
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161 | if (charset != null && charset.length() > 0) { |
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162 | return charset; |
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163 | } |
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164 | } |
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165 | return "us-ascii"; |
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166 | } |
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167 | |
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168 | private void parse() { |
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169 | String body = getBody(); |
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170 | |
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171 | ContentTypeParser parser = new ContentTypeParser(new StringReader(body)); |
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172 | try { |
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173 | parser.parseAll(); |
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174 | } catch (ParseException e) { |
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175 | parseException = e; |
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176 | } catch (TokenMgrError e) { |
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177 | parseException = new ParseException(e.getMessage()); |
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178 | } |
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179 | |
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180 | final String type = parser.getType(); |
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181 | final String subType = parser.getSubType(); |
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182 | |
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183 | if (type != null && subType != null) { |
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184 | mimeType = (type + "/" + subType).toLowerCase(); |
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185 | |
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186 | List<String> paramNames = parser.getParamNames(); |
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187 | List<String> paramValues = parser.getParamValues(); |
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188 | |
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189 | if (paramNames != null && paramValues != null) { |
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190 | final int len = Math.min(paramNames.size(), paramValues.size()); |
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191 | for (int i = 0; i < len; i++) { |
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192 | String paramName = paramNames.get(i).toLowerCase(); |
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193 | String paramValue = paramValues.get(i); |
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194 | parameters.put(paramName, paramValue); |
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195 | } |
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196 | } |
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197 | } |
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198 | |
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199 | parsed = true; |
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200 | } |
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201 | |
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202 | static final FieldParser<ContentTypeFieldImpl> PARSER = new FieldParser<ContentTypeFieldImpl>() { |
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203 | public ContentTypeFieldImpl parse(final String name, final String body, |
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204 | final ByteSequence raw, DecodeMonitor monitor) { |
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205 | return new ContentTypeFieldImpl(name, body, raw, monitor); |
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206 | } |
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207 | }; |
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208 | } |
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