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.dom.address; |
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21 | |
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22 | import java.io.Serializable; |
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23 | import java.util.AbstractList; |
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24 | import java.util.ArrayList; |
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25 | import java.util.Collections; |
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26 | import java.util.List; |
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27 | |
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28 | /** |
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29 | * An immutable, random-access list of Strings (that are supposedly domain names |
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30 | * or domain literals). |
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31 | */ |
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32 | public class DomainList extends AbstractList<String> implements Serializable { |
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33 | |
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34 | private static final long serialVersionUID = 1L; |
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35 | |
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36 | private final List<String> domains; |
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37 | |
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38 | /** |
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39 | * @param domains |
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40 | * A List that contains only String objects. |
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41 | * @param dontCopy |
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42 | * true iff it is not possible for the domains list to be |
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43 | * modified by someone else. |
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44 | */ |
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45 | public DomainList(List<String> domains, boolean dontCopy) { |
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46 | if (domains != null) |
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47 | this.domains = dontCopy ? domains : new ArrayList<String>(domains); |
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48 | else |
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49 | this.domains = Collections.emptyList(); |
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50 | } |
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51 | |
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52 | /** |
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53 | * The number of elements in this list. |
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54 | */ |
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55 | @Override |
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56 | public int size() { |
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57 | return domains.size(); |
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58 | } |
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59 | |
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60 | /** |
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61 | * Gets the domain name or domain literal at the specified index. |
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62 | * |
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63 | * @throws IndexOutOfBoundsException |
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64 | * If index is < 0 or >= size(). |
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65 | */ |
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66 | @Override |
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67 | public String get(int index) { |
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68 | return domains.get(index); |
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69 | } |
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70 | |
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71 | /** |
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72 | * Returns the list of domains formatted as a route string (not including |
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73 | * the trailing ':'). |
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74 | */ |
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75 | public String toRouteString() { |
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76 | StringBuilder sb = new StringBuilder(); |
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77 | |
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78 | for (String domain : domains) { |
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79 | if (sb.length() > 0) { |
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80 | sb.append(','); |
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81 | } |
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82 | |
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83 | sb.append("@"); |
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84 | sb.append(domain); |
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85 | } |
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86 | |
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87 | return sb.toString(); |
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88 | } |
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89 | |
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90 | @Override |
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91 | public String toString() { |
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92 | return toRouteString(); |
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93 | } |
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94 | |
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95 | } |
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