annotate dwt/dnd/FileTransfer.d @ 0:380af2bdd8e5

Upload of whole dwt tree
author Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
date Sat, 09 Aug 2008 17:00:02 +0200
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2006 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Outhink - support for typeFileURL
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11 *******************************************************************************/
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12 module dwt.dnd;
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13
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14 import java.io.*;
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15 import dwt.internal.carbon.*;
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16
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17 /**
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18 * The class <code>FileTransfer</code> provides a platform specific mechanism
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19 * for converting a list of files represented as a java <code>String[]</code> to a
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20 * platform specific representation of the data and vice versa.
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21 * Each <code>String</code> in the array contains the absolute path for a single
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22 * file or directory.
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23 * See <code>Transfer</code> for additional information.
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24 *
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25 * <p>An example of a java <code>String[]</code> containing a list of files is shown
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26 * below:</p>
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27 *
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28 * <code><pre>
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29 * File file1 = new File("C:\temp\file1");
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30 * File file2 = new File("C:\temp\file2");
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31 * String[] fileData = new String[2];
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32 * fileData[0] = file1.getAbsolutePath();
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33 * fileData[1] = file2.getAbsolutePath();
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34 * </code></pre>
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35 */
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36 public class FileTransfer : ByteArrayTransfer {
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37
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38 static FileTransfer _instance = new FileTransfer();
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39 static final String HFS = "hfs "; //$NON-NLS-1$
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40 static final String FURL = "furl"; //$NON-NLS-1$
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41 static final int HFSID = registerType(HFS);
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42 static final int FURLID = registerType(FURL);
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43
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44 FileTransfer() {}
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45
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46 /**
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47 * Returns the singleton instance of the FileTransfer class.
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48 *
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49 * @return the singleton instance of the FileTransfer class
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50 */
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51 public static FileTransfer getInstance () {
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52 return _instance;
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53 }
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54
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55 /**
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56 * This implementation of <code>javaToNative</code> converts a list of file names
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57 * represented by a java <code>String[]</code> to a platform specific representation.
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58 * Each <code>String</code> in the array contains the absolute path for a single
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59 * file or directory. For additional information see
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60 * <code>Transfer#javaToNative</code>.
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61 *
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62 * @param object a java <code>String[]</code> containing the file names to be
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63 * converted
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64 * @param transferData an empty <code>TransferData</code> object; this
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65 * object will be filled in on return with the platform specific format of the data
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66 */
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67 public void javaToNative(Object object, TransferData transferData) {
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68 if (!checkFile(object) || !isSupportedType(transferData)) {
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69 DND.error(DND.ERROR_INVALID_DATA);
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70 }
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71 String[] files = (String[])object;
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72 transferData.result = -1;
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73 byte[][] data = new byte[files.length][];
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74 for (int i = 0; i < data.length; i++) {
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75 File file = new File(files[i]);
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76 bool isDirectory = file.isDirectory();
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77 String fileName = files[i];
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78 char [] chars = new char [fileName.length ()];
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79 fileName.getChars (0, chars.length, chars, 0);
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80 int cfString = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, chars, chars.length);
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81 if (cfString is 0) return;
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82 try {
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83 int url = OS.CFURLCreateWithFileSystemPath(OS.kCFAllocatorDefault, cfString, OS.kCFURLPOSIXPathStyle, isDirectory);
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84 if (url is 0) return;
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85 try {
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86 if (transferData.type is HFSID) {
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87 byte[] fsRef = new byte[80];
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88 if (!OS.CFURLGetFSRef(url, fsRef)) return;
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89 byte[] fsSpec = new byte[70];
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90 if (OS.FSGetCatalogInfo(fsRef, 0, null, null, fsSpec, null) !is OS.noErr) return;
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91 byte[] hfsflavor = new byte[10 + fsSpec.length];
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92 byte[] finfo = new byte[16];
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93 OS.FSpGetFInfo(fsSpec, finfo);
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94 System.arraycopy(finfo, 0, hfsflavor, 0, 10);
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95 System.arraycopy(fsSpec, 0, hfsflavor, 10, fsSpec.length);
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96 data[i] = hfsflavor;
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97 }
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98 if (transferData.type is FURLID) {
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99 int encoding = OS.CFStringGetSystemEncoding();
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100 int theData = OS.CFURLCreateData(OS.kCFAllocatorDefault, url, encoding, true);
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101 if (theData is 0) return;
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102 try {
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103 int length = OS.CFDataGetLength(theData);
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104 byte[] buffer = new byte[length];
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105 CFRange range = new CFRange();
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106 range.length = length;
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107 OS.CFDataGetBytes(theData, range, buffer);
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108 data[i] = buffer;
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109 } finally {
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110 OS.CFRelease(theData);
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111 }
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112 }
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113 } finally {
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114 OS.CFRelease(url);
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115 }
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116 } finally {
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117 OS.CFRelease(cfString);
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118 }
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119 }
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120 transferData.data = data;
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121 transferData.result = 0;
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122 }
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123 /**
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124 * This implementation of <code>nativeToJava</code> converts a platform specific
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125 * representation of a list of file names to a java <code>String[]</code>.
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126 * Each String in the array contains the absolute path for a single file or directory.
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127 * For additional information see <code>Transfer#nativeToJava</code>.
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128 *
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129 * @param transferData the platform specific representation of the data to be
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130 * been converted
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131 * @return a java <code>String[]</code> containing a list of file names if the
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132 * conversion was successful; otherwise null
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133 */
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134 public Object nativeToJava(TransferData transferData) {
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135 if (!isSupportedType(transferData) || transferData.data is null) return null;
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136 if (transferData.data.length is 0) return null;
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137 int count = transferData.data.length;
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138 String[] fileNames = new String[count];
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139 for (int i=0; i<count; i++) {
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140 byte[] data = transferData.data[i];
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141 int url = 0;
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142 if (transferData.type is HFSID) {
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143 byte[] fsspec = new byte[data.length - 10];
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144 System.arraycopy(data, 10, fsspec, 0, fsspec.length);
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145 byte[] fsRef = new byte[80];
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146 if (OS.FSpMakeFSRef(fsspec, fsRef) !is OS.noErr) return null;
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147 url = OS.CFURLCreateFromFSRef(OS.kCFAllocatorDefault, fsRef);
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148 if (url is 0) return null;
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149 }
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150 if (transferData.type is FURLID) {
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151 int encoding = OS.kCFStringEncodingUTF8;
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152 url = OS.CFURLCreateWithBytes(OS.kCFAllocatorDefault, data, data.length, encoding, 0);
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153 if (url is 0) return null;
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154 }
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155 try {
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156 int path = OS.CFURLCopyFileSystemPath(url, OS.kCFURLPOSIXPathStyle);
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157 if (path is 0) return null;
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158 try {
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159 int length = OS.CFStringGetLength(path);
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160 if (length is 0) return null;
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161 char[] buffer= new char[length];
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162 CFRange range = new CFRange();
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163 range.length = length;
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164 OS.CFStringGetCharacters(path, range, buffer);
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165 fileNames[i] = new String(buffer);
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166 } finally {
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167 OS.CFRelease(path);
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168 }
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169 } finally {
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170 OS.CFRelease(url);
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171 }
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172 }
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173 return fileNames;
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174 }
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175
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176 protected int[] getTypeIds(){
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177 return new int[] {FURLID, HFSID};
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178 }
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179
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180 protected String[] getTypeNames(){
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181 return new String[] {FURL, HFS};
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182 }
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183
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184 bool checkFile(Object object) {
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185 if (object is null || !(object instanceof String[]) || ((String[])object).length is 0) return false;
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186 String[] Strings = (String[])object;
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187 for (int i = 0; i < Strings.length; i++) {
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188 if (Strings[i] is null || Strings[i].length() is 0) return false;
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189 }
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190 return true;
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191 }
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192
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193 protected bool validate(Object object) {
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194 return checkFile(object);
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195 }
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196 }