1 | //
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2 | // $Id$
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3 | //
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4 | // jupload - A file upload applet.
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5 | //
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6 | // Copyright 2010 The JUpload Team
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7 | //
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8 | // Created: 27 janv. 2010
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9 | // Creator: etienne_sf
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10 | // Last modified: $Date$
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11 | //
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12 | // This program is free software; you can redistribute it and/or modify
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13 | // it under the terms of the GNU General Public License as published by
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14 | // the Free Software Foundation; either version 2 of the License, or
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15 | // (at your option) any later version.
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16 | //
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17 | // This program is distributed in the hope that it will be useful,
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18 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
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19 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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20 | // GNU General Public License for more details.
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21 | //
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22 | // You should have received a copy of the GNU General Public License
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23 | // along with this program; if not, write to the Free Software
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24 | // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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25 |
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26 | package wjhk.jupload2.upload;
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27 |
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28 | import java.util.ArrayList;
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29 |
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30 | import wjhk.jupload2.policies.UploadPolicy;
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31 |
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32 | /**
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33 | * This file contains a packet of files, which will be sent in one request to
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34 | * the server.
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35 | *
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36 | * @author etienne_sf
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37 | */
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38 | @SuppressWarnings("serial")
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39 | public class UploadFilePacket extends ArrayList<UploadFileData> {
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40 |
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41 | /**
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42 | * The uploadPolicy, useful to get the max number of files and max packet
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43 | * size ... and perhaps other parameters in the future.
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44 | */
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45 | UploadPolicy uploadPolicy = null;
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46 |
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47 | /**
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48 | * The sum of the size of all files in the packet.
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49 | */
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50 | long nbBytes = 0;
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51 |
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52 | /** The maximum number of bytes in one packet to the server */
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53 | long maxNbBytes = -1;
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54 |
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55 | /** The maximum number of files in one packet to the server */
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56 | long maxNbFiles = -1;
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57 |
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58 | /**
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59 | * The standard constructor.
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60 | *
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61 | * @param uploadPolicy
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62 | */
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63 | UploadFilePacket(UploadPolicy uploadPolicy) {
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64 | // nbFilesPerRequest may be very very big. Let's have a more realistic
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65 | // value, in this case (to avoid outOfMemoryError)
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66 | super(Math.min(uploadPolicy.getNbFilesPerRequest(), uploadPolicy
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67 | .getContext().getUploadPanel().getFilePanel().getFilesLength()));
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68 | this.uploadPolicy = uploadPolicy;
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69 | this.maxNbBytes = this.uploadPolicy.getMaxChunkSize();
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70 | this.maxNbFiles = Math.min(uploadPolicy.getNbFilesPerRequest(),
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71 | uploadPolicy.getContext().getUploadPanel().getFilePanel()
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72 | .getFilesLength());
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73 | }
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74 |
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75 | /**
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76 | * Checks if this packet can accept this file, according to the current
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77 | * {@link UploadPolicy}.
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78 | *
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79 | * @param uploadFileData
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80 | * @return True if the file can be added, false otherwise.
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81 | */
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82 | public synchronized boolean canAdd(UploadFileData uploadFileData) {
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83 | // Here is the list of conditions. This code could be smalled. But I
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84 | // want it to be clear.
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85 | if (size() == 0) {
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86 | return true;
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87 | } else if (size() == this.maxNbFiles) {
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88 | // The packet is already full of files
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89 | return false;
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90 | } else if (this.nbBytes + uploadFileData.getUploadLength() > maxNbBytes) {
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91 | // The packet would be too big
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92 | return false;
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93 | } else {
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94 | // No reason to refuse this packet ...
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95 | return true;
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96 | }
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97 | }
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98 |
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99 | /**
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100 | * Indicates whether it is possible to add a file or not, to this packet,
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101 | * according to the current upload policy.
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102 | *
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103 | * @return true if the packet is full, that is: no file can be added to this
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104 | * packet.
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105 | */
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106 | public synchronized boolean isFull() {
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107 | return (size() == this.maxNbFiles) || (this.nbBytes >= maxNbBytes);
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108 | }
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109 |
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110 | /**
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111 | * @param uploadFileData The file to add to the packet
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112 | * @return true if the collection changed, that is: if the file was actually
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113 | * added. false if the Collection didn't change, that is: the packet
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114 | * is full, or th file is already there.
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115 | */
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116 | public synchronized boolean add(UploadFileData uploadFileData) {
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117 | if (!canAdd(uploadFileData)) {
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118 | return false;
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119 | } else if (!super.add(uploadFileData)) {
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120 | return false;
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121 | } else {
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122 | // The file was correctly added.
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123 | nbBytes += uploadFileData.getUploadLength();
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124 | ;
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125 | return true;
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126 | }
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127 | }
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128 |
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129 | /**
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130 | * @return the poisonned status. Returns always false, as this instance is a
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131 | * true one. false indicates the 'End Of Queue' marker in the
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132 | * preparedFileQueue, which is not the case here
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133 | * @see UploadFileDataPoisonned
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134 | */
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135 | public boolean isPoisonned() {
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136 | return false;
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137 | }
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138 |
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139 | // ////////////////////////////////////////////////////////////////////////////
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140 | // Some ArrayList methods are prohibited here
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141 | // ////////////////////////////////////////////////////////////////////////////
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142 | /**
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143 | * Prohibited !
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144 | *
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145 | * @see ArrayList#remove(int)
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146 | */
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147 | public UploadFileData remove(int index) {
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148 | throw new java.lang.UnsupportedOperationException(
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149 | "Removing a file from an UploadFilePacket is prohibited");
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150 | }
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151 |
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152 | /**
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153 | * Prohibited !
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154 | *
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155 | * @see ArrayList#remove(Object)
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156 | */
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157 | public boolean remove(Object o) {
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158 | throw new java.lang.UnsupportedOperationException(
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159 | "Removing a file from an UploadFilePacket is prohibited");
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160 | }
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161 |
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162 | /**
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163 | * Prohibited !
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164 | *
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165 | * @see ArrayList#removeRange(int, int)
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166 | */
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167 | protected void removeRange(int fromIndex, int toIndex) {
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168 | throw new java.lang.UnsupportedOperationException(
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169 | "Removing a file from an UploadFilePacket is prohibited");
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170 | }
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171 | }
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