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annotate org.eclipse.jface/src/org/eclipse/jface/preference/FileFieldEditor.d @ 12:bc29606a740c

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Added dwt-addons in original directory structure of eclipse.org
author Frank Benoit <benoit@tionex.de>
date Sat, 14 Mar 2009 18:23:29 +0100
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2007 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 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module org.eclipse.jface.preference.FileFieldEditor;
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14
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15 import org.eclipse.jface.preference.StringButtonFieldEditor;
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16 // import java.io.File;
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17
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18 import org.eclipse.swt.SWT;
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19 import org.eclipse.swt.widgets.Composite;
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20 import org.eclipse.swt.widgets.FileDialog;
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21 import org.eclipse.jface.resource.JFaceResources;
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22
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23 import java.lang.all;
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24 import java.util.List;
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25 import java.util.Set;
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26 import tango.io.FilePath;
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27 static import tango.io.Path;
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28 import tango.io.FileSystem;
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29
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30 /**
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31 * A field editor for a file path type preference. A standard file
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32 * dialog appears when the user presses the change button.
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33 */
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34 public class FileFieldEditor : StringButtonFieldEditor {
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35
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36 /**
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37 * List of legal file extension suffixes, or <code>null</code>
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38 * for system defaults.
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39 */
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40 private String[] extensions = null;
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41
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42 /**
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43 * Indicates whether the path must be absolute;
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44 * <code>false</code> by default.
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45 */
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46 private bool enforceAbsolute = false;
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47
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48 /**
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49 * Creates a new file field editor
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50 */
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51 protected this() {
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52 }
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53
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54 /**
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55 * Creates a file field editor.
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56 *
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57 * @param name the name of the preference this field editor works on
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58 * @param labelText the label text of the field editor
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59 * @param parent the parent of the field editor's control
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60 */
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61 public this(String name, String labelText, Composite parent) {
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62 this(name, labelText, false, parent);
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63 }
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64
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65 /**
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66 * Creates a file field editor.
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67 *
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68 * @param name the name of the preference this field editor works on
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69 * @param labelText the label text of the field editor
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70 * @param enforceAbsolute <code>true</code> if the file path
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71 * must be absolute, and <code>false</code> otherwise
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72 * @param parent the parent of the field editor's control
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73 */
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74 public this(String name, String labelText, bool enforceAbsolute, Composite parent) {
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75 this(name, labelText, enforceAbsolute, VALIDATE_ON_FOCUS_LOST, parent);
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76 }
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77 /**
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78 * Creates a file field editor.
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79 *
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80 * @param name the name of the preference this field editor works on
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81 * @param labelText the label text of the field editor
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82 * @param enforceAbsolute <code>true</code> if the file path
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83 * must be absolute, and <code>false</code> otherwise
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84 * @param validationStrategy either {@link StringButtonFieldEditor#VALIDATE_ON_KEY_STROKE}
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85 * to perform on the fly checking, or {@link StringButtonFieldEditor#VALIDATE_ON_FOCUS_LOST}
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86 * (the default) to perform validation only after the text has been typed in
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87 * @param parent the parent of the field editor's control.
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88 * @since 3.4
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89 * @see StringButtonFieldEditor#VALIDATE_ON_KEY_STROKE
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90 * @see StringButtonFieldEditor#VALIDATE_ON_FOCUS_LOST
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91 */
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92 public this(String name, String labelText,
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93 bool enforceAbsolute, int validationStrategy, Composite parent) {
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94 init(name, labelText);
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95 this.enforceAbsolute = enforceAbsolute;
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96 setErrorMessage(JFaceResources
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97 .getString("FileFieldEditor.errorMessage"));//$NON-NLS-1$
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98 setChangeButtonText(JFaceResources.getString("openBrowse"));//$NON-NLS-1$
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99 setValidateStrategy(validationStrategy);
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100 createControl(parent);
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101 }
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102
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103 /* (non-Javadoc)
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104 * Method declared on StringButtonFieldEditor.
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105 * Opens the file chooser dialog and returns the selected file.
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106 */
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107 protected override String changePressed() {
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108 auto f = new FilePath(tango.io.Path.standard(getTextControl().getText()));
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109 if (!f.exists()) {
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110 f = cast(FilePath)null;
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111 }
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112 auto d = getFile(f);
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113 if (d is null) {
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114 return null;
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115 }
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116
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117 return FileSystem.toAbsolute( d ).native.toString();
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118 }
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119
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120 /* (non-Javadoc)
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121 * Method declared on StringFieldEditor.
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122 * Checks whether the text input field specifies an existing file.
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123 */
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124 protected override bool checkState() {
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125
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126 String msg = null;
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127
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128 String path = getTextControl().getText();
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129 if (path !is null) {
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130 path = path.trim();
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131 } else {
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132 path = "";//$NON-NLS-1$
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133 }
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134 if (path.length is 0) {
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135 if (!isEmptyStringAllowed()) {
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136 msg = getErrorMessage();
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137 }
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138 } else {
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139 auto file = new FilePath(tango.io.Path.standard(path));
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140 if (/+file.isFile()+/ file.exists && !file.isFolder ) {
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141 if (enforceAbsolute && !file.isAbsolute()) {
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142 msg = JFaceResources
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143 .getString("FileFieldEditor.errorMessage2");//$NON-NLS-1$
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144 }
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145 } else {
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146 msg = getErrorMessage();
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147 }
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148 }
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149
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150 if (msg !is null) { // error
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151 showErrorMessage(msg);
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152 return false;
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153 }
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154
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155 // OK!
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156 clearErrorMessage();
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157 return true;
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158 }
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159
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160 /**
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161 * Helper to open the file chooser dialog.
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162 * @param startingDirectory the directory to open the dialog on.
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163 * @return File The File the user selected or <code>null</code> if they
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164 * do not.
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165 */
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166 private FilePath getFile(FilePath startingDirectory) {
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167
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168 FileDialog dialog = new FileDialog(getShell(), SWT.OPEN);
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169 if (startingDirectory !is null) {
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170 dialog.setFileName(startingDirectory.path());
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171 }
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172 if (extensions !is null) {
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173 dialog.setFilterExtensions(extensions);
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174 }
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175 String file = dialog.open();
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176 if (file !is null) {
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177 file = file.trim();
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178 if (file.length > 0) {
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179 return new FilePath(tango.io.Path.standard(file));
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180 }
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181 }
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182
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183 return null;
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184 }
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185
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186 /**
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187 * Sets this file field editor's file extension filter.
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188 *
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189 * @param extensions a list of file extension, or <code>null</code>
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190 * to set the filter to the system's default value
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191 */
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192 public void setFileExtensions(String[] extensions) {
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193 this.extensions = extensions;
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194 }
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195 }