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.message; |
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21 | |
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22 | import org.apache.james.mime4j.util.ByteSequence; |
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23 | import org.apache.james.mime4j.util.ContentUtil; |
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24 | |
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25 | /** |
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26 | * Represents a MIME multipart body (see RFC 2045).A multipart body has a |
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27 | * ordered list of body parts. The multipart body also has a preamble and |
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28 | * epilogue. The preamble consists of whatever characters appear before the |
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29 | * first body part while the epilogue consists of whatever characters come after |
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30 | * the last body part. |
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31 | */ |
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32 | public class MultipartImpl extends AbstractMultipart { |
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33 | |
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34 | private ByteSequence preamble; |
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35 | private transient String preambleStrCache; |
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36 | private transient boolean preambleComputed = false; |
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37 | private ByteSequence epilogue; |
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38 | private transient String epilogueStrCache; |
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39 | private transient boolean epilogueComputed = false; |
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40 | |
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41 | /** |
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42 | * Creates a new empty <code>Multipart</code> instance. |
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43 | */ |
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44 | public MultipartImpl(String subType) { |
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45 | super(subType); |
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46 | preamble = null; |
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47 | preambleStrCache = null; |
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48 | preambleComputed = true; |
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49 | epilogue = null; |
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50 | epilogueStrCache = null; |
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51 | epilogueComputed = true; |
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52 | } |
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53 | |
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54 | // package private for now; might become public someday |
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55 | public ByteSequence getPreambleRaw() { |
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56 | return preamble; |
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57 | } |
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58 | |
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59 | public void setPreambleRaw(ByteSequence preamble) { |
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60 | this.preamble = preamble; |
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61 | this.preambleStrCache = null; |
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62 | this.preambleComputed = false; |
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63 | } |
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64 | |
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65 | /** |
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66 | * Gets the preamble. |
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67 | * |
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68 | * @return the preamble. |
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69 | */ |
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70 | @Override |
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71 | public String getPreamble() { |
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72 | if (!preambleComputed) { |
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73 | preambleStrCache = preamble != null ? ContentUtil.decode(preamble) : null; |
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74 | preambleComputed = true; |
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75 | } |
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76 | return preambleStrCache; |
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77 | } |
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78 | |
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79 | /** |
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80 | * Sets the preamble. |
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81 | * |
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82 | * @param preamble |
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83 | * the preamble. |
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84 | */ |
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85 | @Override |
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86 | public void setPreamble(String preamble) { |
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87 | this.preamble = preamble != null ? ContentUtil.encode(preamble) : null; |
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88 | this.preambleStrCache = preamble; |
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89 | this.preambleComputed = true; |
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90 | } |
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91 | |
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92 | // package private for now; might become public someday |
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93 | public ByteSequence getEpilogueRaw() { |
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94 | return epilogue; |
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95 | } |
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96 | |
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97 | public void setEpilogueRaw(ByteSequence epilogue) { |
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98 | this.epilogue = epilogue; |
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99 | this.epilogueStrCache = null; |
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100 | this.epilogueComputed = false; |
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101 | } |
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102 | |
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103 | /** |
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104 | * Gets the epilogue. |
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105 | * |
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106 | * @return the epilogue. |
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107 | */ |
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108 | @Override |
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109 | public String getEpilogue() { |
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110 | if (!epilogueComputed) { |
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111 | epilogueStrCache = epilogue != null ? ContentUtil.decode(epilogue) : null; |
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112 | epilogueComputed = true; |
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113 | } |
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114 | return epilogueStrCache; |
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115 | } |
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116 | |
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117 | /** |
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118 | * Sets the epilogue. |
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119 | * |
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120 | * @param epilogue |
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121 | * the epilogue. |
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122 | */ |
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123 | @Override |
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124 | public void setEpilogue(String epilogue) { |
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125 | this.epilogue = epilogue != null ? ContentUtil.encode(epilogue) : null; |
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126 | this.epilogueStrCache = epilogue; |
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127 | this.epilogueComputed = true; |
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128 | } |
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129 | |
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130 | } |
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