[3951] | 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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