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.address; |
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21 | |
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22 | import java.util.ArrayList; |
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23 | import java.util.Iterator; |
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24 | import java.util.List; |
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25 | |
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26 | import org.apache.james.mime4j.codec.DecodeMonitor; |
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27 | import org.apache.james.mime4j.codec.DecoderUtil; |
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28 | import org.apache.james.mime4j.dom.address.Address; |
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29 | import org.apache.james.mime4j.dom.address.AddressList; |
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30 | import org.apache.james.mime4j.dom.address.DomainList; |
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31 | import org.apache.james.mime4j.dom.address.Group; |
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32 | import org.apache.james.mime4j.dom.address.Mailbox; |
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33 | import org.apache.james.mime4j.dom.address.MailboxList; |
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34 | |
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35 | /** |
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36 | * Transforms the JJTree-generated abstract syntax tree into a graph of |
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37 | * org.apache.james.mime4j.dom.address objects. |
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38 | */ |
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39 | class Builder { |
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40 | |
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41 | private static Builder singleton = new Builder(); |
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42 | |
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43 | public static Builder getInstance() { |
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44 | return singleton; |
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45 | } |
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46 | |
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47 | public AddressList buildAddressList(ASTaddress_list node, DecodeMonitor monitor) throws ParseException { |
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48 | List<Address> list = new ArrayList<Address>(); |
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49 | for (int i = 0; i < node.jjtGetNumChildren(); i++) { |
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50 | ASTaddress childNode = (ASTaddress) node.jjtGetChild(i); |
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51 | Address address = buildAddress(childNode, monitor); |
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52 | list.add(address); |
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53 | } |
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54 | return new AddressList(list, true); |
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55 | } |
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56 | |
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57 | public Address buildAddress(ASTaddress node, DecodeMonitor monitor) throws ParseException { |
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58 | ChildNodeIterator it = new ChildNodeIterator(node); |
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59 | Node n = it.next(); |
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60 | if (n instanceof ASTaddr_spec) { |
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61 | return buildAddrSpec((ASTaddr_spec) n); |
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62 | } else if (n instanceof ASTangle_addr) { |
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63 | return buildAngleAddr((ASTangle_addr) n); |
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64 | } else if (n instanceof ASTphrase) { |
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65 | String name = buildString((ASTphrase) n, false); |
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66 | Node n2 = it.next(); |
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67 | if (n2 instanceof ASTgroup_body) { |
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68 | return new Group(name, buildGroupBody((ASTgroup_body) n2, monitor)); |
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69 | } else if (n2 instanceof ASTangle_addr) { |
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70 | try { |
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71 | name = DecoderUtil.decodeEncodedWords(name, monitor); |
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72 | } catch (IllegalArgumentException e) { |
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73 | throw new ParseException(e.getMessage()); |
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74 | } |
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75 | Mailbox mb = buildAngleAddr((ASTangle_addr) n2); |
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76 | return new Mailbox(name, mb.getRoute(), mb.getLocalPart(), |
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77 | mb.getDomain()); |
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78 | } else { |
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79 | throw new ParseException(); |
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80 | } |
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81 | } else { |
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82 | throw new ParseException(); |
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83 | } |
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84 | } |
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85 | |
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86 | private MailboxList buildGroupBody(ASTgroup_body node, DecodeMonitor monitor) throws ParseException { |
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87 | List<Mailbox> results = new ArrayList<Mailbox>(); |
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88 | ChildNodeIterator it = new ChildNodeIterator(node); |
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89 | while (it.hasNext()) { |
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90 | Node n = it.next(); |
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91 | if (n instanceof ASTmailbox) |
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92 | results.add(buildMailbox((ASTmailbox) n, monitor)); |
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93 | else |
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94 | throw new ParseException(); |
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95 | } |
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96 | return new MailboxList(results, true); |
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97 | } |
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98 | |
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99 | public Mailbox buildMailbox(ASTmailbox node, DecodeMonitor monitor) throws ParseException { |
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100 | ChildNodeIterator it = new ChildNodeIterator(node); |
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101 | Node n = it.next(); |
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102 | if (n instanceof ASTaddr_spec) { |
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103 | return buildAddrSpec((ASTaddr_spec) n); |
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104 | } else if (n instanceof ASTangle_addr) { |
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105 | return buildAngleAddr((ASTangle_addr) n); |
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106 | } else if (n instanceof ASTname_addr) { |
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107 | return buildNameAddr((ASTname_addr) n, monitor); |
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108 | } else { |
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109 | throw new ParseException(); |
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110 | } |
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111 | } |
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112 | |
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113 | private Mailbox buildNameAddr(ASTname_addr node, DecodeMonitor monitor) throws ParseException { |
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114 | ChildNodeIterator it = new ChildNodeIterator(node); |
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115 | Node n = it.next(); |
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116 | String name; |
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117 | if (n instanceof ASTphrase) { |
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118 | name = buildString((ASTphrase) n, false); |
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119 | } else { |
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120 | throw new ParseException(); |
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121 | } |
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122 | |
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123 | n = it.next(); |
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124 | if (n instanceof ASTangle_addr) { |
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125 | try { |
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126 | name = DecoderUtil.decodeEncodedWords(name, monitor); |
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127 | } catch (IllegalArgumentException e) { |
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128 | throw new ParseException(e.getMessage()); |
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129 | } |
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130 | Mailbox mb = buildAngleAddr((ASTangle_addr) n); |
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131 | return new Mailbox(name, mb.getRoute(), mb.getLocalPart(), |
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132 | mb.getDomain()); |
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133 | } else { |
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134 | throw new ParseException(); |
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135 | } |
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136 | } |
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137 | |
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138 | private Mailbox buildAngleAddr(ASTangle_addr node) throws ParseException { |
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139 | ChildNodeIterator it = new ChildNodeIterator(node); |
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140 | DomainList route = null; |
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141 | Node n = it.next(); |
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142 | if (n instanceof ASTroute) { |
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143 | route = buildRoute((ASTroute) n); |
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144 | n = it.next(); |
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145 | } else if (n instanceof ASTaddr_spec) { |
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146 | // do nothing |
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147 | } |
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148 | else |
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149 | throw new ParseException(); |
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150 | |
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151 | if (n instanceof ASTaddr_spec) |
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152 | return buildAddrSpec(route, (ASTaddr_spec) n); |
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153 | else |
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154 | throw new ParseException(); |
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155 | } |
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156 | |
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157 | private DomainList buildRoute(ASTroute node) throws ParseException { |
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158 | List<String> results = new ArrayList<String>(node.jjtGetNumChildren()); |
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159 | ChildNodeIterator it = new ChildNodeIterator(node); |
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160 | while (it.hasNext()) { |
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161 | Node n = it.next(); |
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162 | if (n instanceof ASTdomain) |
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163 | results.add(buildString((ASTdomain) n, true)); |
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164 | else |
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165 | throw new ParseException(); |
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166 | } |
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167 | return new DomainList(results, true); |
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168 | } |
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169 | |
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170 | private Mailbox buildAddrSpec(ASTaddr_spec node) { |
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171 | return buildAddrSpec(null, node); |
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172 | } |
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173 | |
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174 | private Mailbox buildAddrSpec(DomainList route, ASTaddr_spec node) { |
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175 | ChildNodeIterator it = new ChildNodeIterator(node); |
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176 | String localPart = buildString((ASTlocal_part) it.next(), true); |
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177 | String domain = buildString((ASTdomain) it.next(), true); |
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178 | return new Mailbox(route, localPart, domain); |
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179 | } |
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180 | |
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181 | private String buildString(SimpleNode node, boolean stripSpaces) { |
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182 | Token head = node.firstToken; |
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183 | Token tail = node.lastToken; |
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184 | StringBuilder out = new StringBuilder(); |
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185 | |
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186 | while (head != tail) { |
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187 | out.append(head.image); |
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188 | head = head.next; |
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189 | if (!stripSpaces) |
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190 | addSpecials(out, head.specialToken); |
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191 | } |
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192 | out.append(tail.image); |
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193 | |
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194 | return out.toString(); |
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195 | } |
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196 | |
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197 | private void addSpecials(StringBuilder out, Token specialToken) { |
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198 | if (specialToken != null) { |
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199 | addSpecials(out, specialToken.specialToken); |
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200 | out.append(specialToken.image); |
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201 | } |
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202 | } |
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203 | |
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204 | private static class ChildNodeIterator implements Iterator<Node> { |
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205 | |
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206 | private SimpleNode simpleNode; |
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207 | private int index; |
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208 | private int len; |
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209 | |
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210 | public ChildNodeIterator(SimpleNode simpleNode) { |
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211 | this.simpleNode = simpleNode; |
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212 | this.len = simpleNode.jjtGetNumChildren(); |
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213 | this.index = 0; |
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214 | } |
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215 | |
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216 | public void remove() { |
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217 | throw new UnsupportedOperationException(); |
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218 | } |
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219 | |
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220 | public boolean hasNext() { |
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221 | return index < len; |
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222 | } |
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223 | |
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224 | public Node next() { |
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225 | return simpleNode.jjtGetChild(index++); |
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226 | } |
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227 | |
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228 | } |
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229 | } |
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