4313 add option to disable limiting of deleted file display to 10k

Core/src/org/sleuthkit/autopsy/corecomponents/Bundle.properties

@@ -190,3 +190,5 @@ ViewPreferencesPanel.hideRejectedResultsCheckbox.text=Hide rejected results
 ViewPreferencesPanel.hideOtherUsersTagsLabel.text=Hide other users' tags in the:
 ViewPreferencesPanel.centralRepoLabel.text=Do not use Central Repository for:
 ViewPreferencesPanel.commentsOccurencesColumnsCheckbox.text=C(omments) and O(ccurences) columns to reduce loading times
+ViewPreferencesPanel.deletedFilesLimitCheckbox.text=Limit to 10,000
+ViewPreferencesPanel.deletedFilesLimitLabel.text=Limit number of deleted files displayed:

Core/src/org/sleuthkit/autopsy/corecomponents/ViewPreferencesPanel.form

@@ -79,8 +79,18 @@
               <Layout>
                 <DimensionLayout dim="0">
                   <Group type="103" groupAlignment="0" attributes="0">
-                      <Group type="102" alignment="0" attributes="0">
+                      <Group type="102" attributes="0">
                           <EmptySpace max="-2" attributes="0"/>
+                          <Group type="103" groupAlignment="0" attributes="0">
+                              <Group type="102" attributes="0">
+                                  <EmptySpace min="10" pref="10" max="-2" attributes="0"/>
+                                  <Group type="103" groupAlignment="0" attributes="0">
+                                      <Component id="commentsOccurencesColumnsCheckbox" min="-2" max="-2" attributes="0"/>
+                                      <Component id="hideOtherUsersTagsCheckbox" min="-2" max="-2" attributes="0"/>
+                                      <Component id="deletedFilesLimitCheckbox" alignment="0" max="32767" attributes="0"/>
+                                  </Group>
+                              </Group>
+                              <Group type="102" attributes="0">
                                   <Group type="103" groupAlignment="0" attributes="0">
                                       <Group type="102" alignment="0" attributes="0">
                                           <Group type="103" groupAlignment="0" attributes="0">
@@ -122,22 +132,19 @@
                                       </Group>
                                       <Component id="hideOtherUsersTagsLabel" alignment="0" min="-2" max="-2" attributes="0"/>
                                       <Component id="centralRepoLabel" alignment="0" min="-2" max="-2" attributes="0"/>
-                              <Group type="102" attributes="0">
+                                      <Component id="deletedFilesLimitLabel" alignment="0" min="-2" pref="215" max="-2" attributes="0"/>
-                                  <EmptySpace min="10" pref="10" max="-2" attributes="0"/>
+                                  </Group>
-                                  <Group type="103" groupAlignment="0" attributes="0">
+                                  <EmptySpace min="0" pref="10" max="32767" attributes="0"/>
-                                      <Component id="commentsOccurencesColumnsCheckbox" min="-2" max="-2" attributes="0"/>
-                                      <Component id="hideOtherUsersTagsCheckbox" min="-2" max="-2" attributes="0"/>
                               </Group>
                           </Group>
-                          </Group>
+                          <EmptySpace max="-2" attributes="0"/>
-                          <EmptySpace pref="16" max="32767" attributes="0"/>
                       </Group>
                   </Group>
                 </DimensionLayout>
                 <DimensionLayout dim="1">
                   <Group type="103" groupAlignment="0" attributes="0">
                       <Group type="102" alignment="0" attributes="0">
-                          <EmptySpace max="32767" attributes="0"/>
+                          <EmptySpace max="-2" attributes="0"/>
                           <Group type="103" groupAlignment="0" attributes="0">
                               <Group type="102" alignment="0" attributes="0">
                                   <Component id="hideKnownFilesLabel" min="-2" max="-2" attributes="0"/>
@@ -174,6 +181,11 @@
                           <Component id="centralRepoLabel" min="-2" max="-2" attributes="0"/>
                           <EmptySpace max="-2" attributes="0"/>
                           <Component id="commentsOccurencesColumnsCheckbox" min="-2" max="-2" attributes="0"/>
+                          <EmptySpace type="unrelated" max="-2" attributes="0"/>
+                          <Component id="deletedFilesLimitLabel" min="-2" max="-2" attributes="0"/>
+                          <EmptySpace max="-2" attributes="0"/>
+                          <Component id="deletedFilesLimitCheckbox" min="-2" pref="33" max="-2" attributes="0"/>
+                          <EmptySpace min="0" pref="0" max="-2" attributes="0"/>
                       </Group>
                   </Group>
                 </DimensionLayout>
@@ -327,6 +339,23 @@
                     </Property>
                   </Properties>
                 </Component>
+                <Component class="javax.swing.JCheckBox" name="deletedFilesLimitCheckbox">
+                  <Properties>
+                    <Property name="text" type="java.lang.String" editor="org.netbeans.modules.i18n.form.FormI18nStringEditor">
+                      <ResourceString bundle="org/sleuthkit/autopsy/corecomponents/Bundle.properties" key="ViewPreferencesPanel.deletedFilesLimitCheckbox.text" replaceFormat="org.openide.util.NbBundle.getMessage({sourceFileName}.class, &quot;{key}&quot;)"/>
+                    </Property>
+                  </Properties>
+                  <Events>
+                    <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="deletedFilesLimitCheckboxActionPerformed"/>
+                  </Events>
+                </Component>
+                <Component class="javax.swing.JLabel" name="deletedFilesLimitLabel">
+                  <Properties>
+                    <Property name="text" type="java.lang.String" editor="org.netbeans.modules.i18n.form.FormI18nStringEditor">
+                      <ResourceString bundle="org/sleuthkit/autopsy/corecomponents/Bundle.properties" key="ViewPreferencesPanel.deletedFilesLimitLabel.text" replaceFormat="org.openide.util.NbBundle.getMessage({sourceFileName}.class, &quot;{key}&quot;)"/>
+                    </Property>
+                  </Properties>
+                </Component>
               </SubComponents>
             </Container>
             <Container class="javax.swing.JPanel" name="currentCaseSettingsPanel">
@@ -388,7 +417,7 @@
                   <Group type="103" groupAlignment="0" attributes="0">
                       <Group type="102" alignment="0" attributes="0">
                           <EmptySpace max="-2" attributes="0"/>
-                          <Component id="hideRejectedResultsCheckbox" min="-2" max="-2" attributes="0"/>
+                          <Component id="hideRejectedResultsCheckbox" min="-2" pref="259" max="-2" attributes="0"/>
                           <EmptySpace max="32767" attributes="0"/>
                       </Group>
                   </Group>

Core/src/org/sleuthkit/autopsy/corecomponents/ViewPreferencesPanel.java

@@ -25,6 +25,7 @@ import org.sleuthkit.autopsy.casemodule.Case;
 import org.sleuthkit.autopsy.casemodule.CasePreferences;
 import org.sleuthkit.autopsy.centralrepository.datamodel.EamDbUtil;
 import org.sleuthkit.autopsy.core.UserPreferences;
+import org.sleuthkit.autopsy.deletedFiles.DeletedFilePreferences;
 import org.sleuthkit.autopsy.directorytree.DirectoryTreeTopComponent;
 
 /**
@@ -65,6 +66,8 @@ public class ViewPreferencesPanel extends JPanel implements OptionsPanel {
         commentsOccurencesColumnsCheckbox.setEnabled(EamDbUtil.useCentralRepo());
         commentsOccurencesColumnsCheckbox.setSelected(UserPreferences.hideCentralRepoCommentsAndOccurrences());
 
+        deletedFilesLimitCheckbox.setSelected(DeletedFilePreferences.getDefault().getShouldLimitDeletedFiles());
+
         // Current Case Settings
         boolean caseIsOpen = Case.isCaseOpen();
         currentCaseSettingsPanel.setEnabled(caseIsOpen);
@@ -91,6 +94,8 @@ public class ViewPreferencesPanel extends JPanel implements OptionsPanel {
         storeGroupItemsInTreeByDataSource();
 
         DirectoryTreeTopComponent.getDefault().setShowRejectedResults(hideRejectedResultsCheckbox.isSelected() == false);
+
+        DeletedFilePreferences.getDefault().setShouldLimitDeletedFiles(deletedFilesLimitCheckbox.isSelected());
     }
 
     /**
@@ -135,6 +140,8 @@ public class ViewPreferencesPanel extends JPanel implements OptionsPanel {
         hideOtherUsersTagsLabel = new javax.swing.JLabel();
         commentsOccurencesColumnsCheckbox = new javax.swing.JCheckBox();
         centralRepoLabel = new javax.swing.JLabel();
+        deletedFilesLimitCheckbox = new javax.swing.JCheckBox();
+        deletedFilesLimitLabel = new javax.swing.JLabel();
         currentCaseSettingsPanel = new javax.swing.JPanel();
         groupByDataSourceCheckbox = new javax.swing.JCheckBox();
         currentSessionSettingsPanel = new javax.swing.JPanel();
@@ -228,12 +235,29 @@ public class ViewPreferencesPanel extends JPanel implements OptionsPanel {
 
         org.openide.awt.Mnemonics.setLocalizedText(centralRepoLabel, org.openide.util.NbBundle.getMessage(ViewPreferencesPanel.class, "ViewPreferencesPanel.centralRepoLabel.text")); // NOI18N
 
+        org.openide.awt.Mnemonics.setLocalizedText(deletedFilesLimitCheckbox, org.openide.util.NbBundle.getMessage(ViewPreferencesPanel.class, "ViewPreferencesPanel.deletedFilesLimitCheckbox.text")); // NOI18N
+        deletedFilesLimitCheckbox.addActionListener(new java.awt.event.ActionListener() {
+            public void actionPerformed(java.awt.event.ActionEvent evt) {
+                deletedFilesLimitCheckboxActionPerformed(evt);
+            }
+        });
+
+        org.openide.awt.Mnemonics.setLocalizedText(deletedFilesLimitLabel, org.openide.util.NbBundle.getMessage(ViewPreferencesPanel.class, "ViewPreferencesPanel.deletedFilesLimitLabel.text")); // NOI18N
+
         javax.swing.GroupLayout globalSettingsPanelLayout = new javax.swing.GroupLayout(globalSettingsPanel);
         globalSettingsPanel.setLayout(globalSettingsPanelLayout);
         globalSettingsPanelLayout.setHorizontalGroup(
             globalSettingsPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
             .addGroup(globalSettingsPanelLayout.createSequentialGroup()
                 .addContainerGap()
+                .addGroup(globalSettingsPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+                    .addGroup(globalSettingsPanelLayout.createSequentialGroup()
+                        .addGap(10, 10, 10)
+                        .addGroup(globalSettingsPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+                            .addComponent(commentsOccurencesColumnsCheckbox)
+                            .addComponent(hideOtherUsersTagsCheckbox)
+                            .addComponent(deletedFilesLimitCheckbox, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
+                    .addGroup(globalSettingsPanelLayout.createSequentialGroup()
                         .addGroup(globalSettingsPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                             .addGroup(globalSettingsPanelLayout.createSequentialGroup()
                                 .addGroup(globalSettingsPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
@@ -264,17 +288,14 @@ public class ViewPreferencesPanel extends JPanel implements OptionsPanel {
                                     .addComponent(selectFileLabel)))
                             .addComponent(hideOtherUsersTagsLabel)
                             .addComponent(centralRepoLabel)
-                    .addGroup(globalSettingsPanelLayout.createSequentialGroup()
+                            .addComponent(deletedFilesLimitLabel, javax.swing.GroupLayout.PREFERRED_SIZE, 215, javax.swing.GroupLayout.PREFERRED_SIZE))
-                        .addGap(10, 10, 10)
+                        .addGap(0, 10, Short.MAX_VALUE)))
-                        .addGroup(globalSettingsPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+                .addContainerGap())
-                            .addComponent(commentsOccurencesColumnsCheckbox)
-                            .addComponent(hideOtherUsersTagsCheckbox))))
-                .addContainerGap(16, Short.MAX_VALUE))
         );
         globalSettingsPanelLayout.setVerticalGroup(
             globalSettingsPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
             .addGroup(globalSettingsPanelLayout.createSequentialGroup()
-                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
+                .addContainerGap()
                 .addGroup(globalSettingsPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                     .addGroup(globalSettingsPanelLayout.createSequentialGroup()
                         .addComponent(hideKnownFilesLabel)
@@ -307,7 +328,12 @@ public class ViewPreferencesPanel extends JPanel implements OptionsPanel {
                 .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                 .addComponent(centralRepoLabel)
                 .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
-                .addComponent(commentsOccurencesColumnsCheckbox))
+                .addComponent(commentsOccurencesColumnsCheckbox)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
+                .addComponent(deletedFilesLimitLabel)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
+                .addComponent(deletedFilesLimitCheckbox, javax.swing.GroupLayout.PREFERRED_SIZE, 33, javax.swing.GroupLayout.PREFERRED_SIZE)
+                .addGap(0, 0, 0))
         );
 
         currentCaseSettingsPanel.setBorder(javax.swing.BorderFactory.createTitledBorder(org.openide.util.NbBundle.getMessage(ViewPreferencesPanel.class, "ViewPreferencesPanel.currentCaseSettingsPanel.border.title"))); // NOI18N
@@ -350,7 +376,7 @@ public class ViewPreferencesPanel extends JPanel implements OptionsPanel {
             currentSessionSettingsPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
             .addGroup(currentSessionSettingsPanelLayout.createSequentialGroup()
                 .addContainerGap()
-                .addComponent(hideRejectedResultsCheckbox)
+                .addComponent(hideRejectedResultsCheckbox, javax.swing.GroupLayout.PREFERRED_SIZE, 259, javax.swing.GroupLayout.PREFERRED_SIZE)
                 .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
         );
         currentSessionSettingsPanelLayout.setVerticalGroup(
@@ -501,6 +527,14 @@ public class ViewPreferencesPanel extends JPanel implements OptionsPanel {
         }
     }//GEN-LAST:event_commentsOccurencesColumnsCheckboxActionPerformed
 
+    private void deletedFilesLimitCheckboxActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_deletedFilesLimitCheckboxActionPerformed
+        if (immediateUpdates) {
+            DeletedFilePreferences.getDefault().setShouldLimitDeletedFiles(deletedFilesLimitCheckbox.isSelected());
+        } else {
+            firePropertyChange(OptionsPanelController.PROP_CHANGED, null, null);
+        }
+    }//GEN-LAST:event_deletedFilesLimitCheckboxActionPerformed
+
 
     // Variables declaration - do not modify//GEN-BEGIN:variables
     private javax.swing.JLabel centralRepoLabel;
@@ -509,6 +543,8 @@ public class ViewPreferencesPanel extends JPanel implements OptionsPanel {
     private javax.swing.JPanel currentSessionSettingsPanel;
     private javax.swing.JCheckBox dataSourcesHideKnownCheckbox;
     private javax.swing.JCheckBox dataSourcesHideSlackCheckbox;
+    private javax.swing.JCheckBox deletedFilesLimitCheckbox;
+    private javax.swing.JLabel deletedFilesLimitLabel;
     private javax.swing.JLabel displayTimeLabel;
     private javax.swing.JPanel globalSettingsPanel;
     private javax.swing.JCheckBox groupByDataSourceCheckbox;

Core/src/org/sleuthkit/autopsy/datamodel/DeletedContent.java

@@ -45,6 +45,7 @@ import org.sleuthkit.autopsy.casemodule.NoCurrentCaseException;
 import org.sleuthkit.autopsy.core.UserPreferences;
 import org.sleuthkit.autopsy.coreutils.Logger;
 import static org.sleuthkit.autopsy.datamodel.Bundle.*;
+import org.sleuthkit.autopsy.deletedFiles.DeletedFilePreferences;
 import org.sleuthkit.autopsy.ingest.IngestManager;
 import org.sleuthkit.datamodel.AbstractFile;
 import org.sleuthkit.datamodel.Content;
@@ -191,6 +192,7 @@ public class DeletedContent implements AutopsyVisitableItem {
          * fired. Other nodes are listening to this for changes.
          */
         private static final class DeletedContentsChildrenObservable extends Observable {
+
             private static final Set<Case.Events> CASE_EVENTS_OF_INTEREST = EnumSet.of(
                     Case.Events.DATA_SOURCE_ADDED,
                     Case.Events.CURRENT_CASE
@@ -213,12 +215,11 @@ public class DeletedContent implements AutopsyVisitableItem {
                 String eventType = evt.getPropertyName();
                 if (eventType.equals(IngestManager.IngestModuleEvent.CONTENT_CHANGED.toString())) {
                     /**
-                     * + // @@@ COULD CHECK If the new file is deleted
+                     * + // @@@ COULD CHECK If the new file is deleted before
-                     * before notifying... Checking for a current case is a
+                     * notifying... Checking for a current case is a stop gap
-                     * stop gap measure	+ update(); until a different way of
+                     * measure	+ update(); until a different way of handling the
-                     * handling the closing of cases is worked out.
+                     * closing of cases is worked out. Currently, remote events
-                     * Currently, remote events may be received for a case
+                     * may be received for a case that is already closed.
-                     * that is already closed.
                      */
                     try {
                         Case.getCurrentCaseThrows();
@@ -234,10 +235,10 @@ public class DeletedContent implements AutopsyVisitableItem {
                         || eventType.equals(IngestManager.IngestJobEvent.CANCELLED.toString())
                         || eventType.equals(Case.Events.DATA_SOURCE_ADDED.toString())) {
                     /**
-                     * Checking for a current case is a stop gap measure
+                     * Checking for a current case is a stop gap measure until a
-                     * until a different way of handling the closing of
+                     * different way of handling the closing of cases is worked
-                     * cases is worked out. Currently, remote events may be
+                     * out. Currently, remote events may be received for a case
-                     * received for a case that is already closed.
+                     * that is already closed.
                      */
                     try {
                         Case.getCurrentCaseThrows();
@@ -282,7 +283,7 @@ public class DeletedContent implements AutopsyVisitableItem {
             // Use version that has observer for updates
             @Deprecated
             DeletedContentNode(SleuthkitCase skCase, DeletedContent.DeletedContentFilter filter, long dsObjId) {
-                super(Children.create(new DeletedContentChildren(filter, skCase, null, dsObjId ), true), Lookups.singleton(filter.getDisplayName()));
+                super(Children.create(new DeletedContentChildren(filter, skCase, null, dsObjId), true), Lookups.singleton(filter.getDisplayName()));
                 this.filter = filter;
                 this.datasourceObjId = dsObjId;
                 init();
@@ -366,7 +367,7 @@ public class DeletedContent implements AutopsyVisitableItem {
             private final SleuthkitCase skCase;
             private final DeletedContent.DeletedContentFilter filter;
             private static final Logger logger = Logger.getLogger(DeletedContentChildren.class.getName());
-            private static final int MAX_OBJECTS = 10001;
+
             private final Observable notifier;
             private final long datasourceObjId;
 
@@ -408,15 +409,16 @@ public class DeletedContent implements AutopsyVisitableItem {
                 + "There are more Deleted Files than can be displayed."
                 + " Only the first {0} Deleted Files will be shown."})
             protected boolean createKeys(List<AbstractFile> list) {
+                DeletedFilePreferences deletedPreferences = DeletedFilePreferences.getDefault();
                 List<AbstractFile> queryList = runFsQuery();
-                if (queryList.size() == MAX_OBJECTS) {
+                if (deletedPreferences.getShouldLimitDeletedFiles() && queryList.size() == deletedPreferences.getDeletedFilesLimit()) {
                     queryList.remove(queryList.size() - 1);
                     // only show the dialog once - not each time we refresh
                     if (maxFilesDialogShown == false) {
                         maxFilesDialogShown = true;
                         SwingUtilities.invokeLater(()
                                 -> JOptionPane.showMessageDialog(WindowManager.getDefault().getMainWindow(),
-                                        DeletedContent_createKeys_maxObjects_msg(MAX_OBJECTS - 1))
+                                        DeletedContent_createKeys_maxObjects_msg(deletedPreferences.getDeletedFilesLimit() - 1))
                         );
                     }
                 } 
@@ -465,8 +467,10 @@ public class DeletedContent implements AutopsyVisitableItem {
                 if (Objects.equals(CasePreferences.getGroupItemsInTreeByDataSource(), true)) {
                     query += " AND data_source_obj_id = " + filteringDSObjId;
                 }
-                
+                DeletedFilePreferences deletedPreferences = DeletedFilePreferences.getDefault();
-                query += " LIMIT " + MAX_OBJECTS; //NON-NLS
+                if (deletedPreferences.getShouldLimitDeletedFiles()) {
+                    query += " LIMIT " + deletedPreferences.getDeletedFilesLimit(); //NON-NLS
+                }
                 return query;
             }
 

Core/src/org/sleuthkit/autopsy/deletedFiles/DeletedFilePreferences.java

@@ -0,0 +1,171 @@
+/*
+ * Autopsy Forensic Browser
+ *
+ * Copyright 2018 Basis Technology Corp.
+ * Contact: carrier <at> sleuthkit <dot> org
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.sleuthkit.autopsy.deletedFiles;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Properties;
+import java.util.logging.Level;
+import org.sleuthkit.autopsy.casemodule.CasePreferences;
+import org.sleuthkit.autopsy.coreutils.PlatformUtil;
+import org.sleuthkit.autopsy.coreutils.Logger;
+import org.sleuthkit.autopsy.directorytree.DirectoryTreeTopComponent;
+
+/**
+ * Class to store settings related to the display of deleted files.
+ */
+public class DeletedFilePreferences {
+
+    private static final String SETTINGS_FILE = "DeletedFilePreferences.properties"; //NON-NLS
+    private static final String KEY_LIMIT_DELETED_FILES = "limitDeletedFiles"; //NON-NLS
+    private static final String KEY_LIMIT_VALUE = "limitValue";
+    private static final String VALUE_TRUE = "true"; //NON-NLS
+    private static final String VALUE_FALSE = "false"; //NON-NLS
+    private static final int DEFAULT_MAX_OBJECTS = 10001;
+    private static final Logger logger = Logger.getLogger(CasePreferences.class.getName());
+    private static DeletedFilePreferences defaultInstance;
+    private static boolean limitDeletedFiles = true;
+    private static int deletedFilesLimit = DEFAULT_MAX_OBJECTS;
+
+    /**
+     * Get the settings for the display of deleted files.
+     *
+     * @return defaultInstance with freshly loaded
+     */
+    public static synchronized DeletedFilePreferences getDefault() {
+        if (defaultInstance == null) {
+            defaultInstance = new DeletedFilePreferences();
+        }
+        defaultInstance.loadFromStorage();
+        return defaultInstance;
+    }
+
+    /**
+     * Prevent instantiation.
+     */
+    private DeletedFilePreferences() {
+    }
+
+    /**
+     * Get the 'limitDeletedFiles' value. This can be true or false. It will
+     * default to true if it was not saved correctly previously.s
+     *
+     * @return true if the number of deleted files displayed should be limied,
+     *         false if it should not be limited.
+     */
+    public boolean getShouldLimitDeletedFiles() {
+        return limitDeletedFiles;
+    }
+
+    /**
+     * Set the 'limitDeletedFiles' value to true or false.
+     *
+     * @param value true if the number of deleted files displayed should be
+     *              limied, false if it should not be limited.
+     */
+    public void setShouldLimitDeletedFiles(boolean value) {
+        limitDeletedFiles = value;
+        saveToStorage();
+        DirectoryTreeTopComponent.getDefault().refreshContentTreeSafe();
+    }
+
+    /**
+     * Get the 'limitValue' value. This is an interger value and will default to
+     * DEFAULT_MAX_OBJECTS if it was not previously saved correctly.
+     *
+     * @return an integer representing the max number of deleted files to display.
+     */
+    public int getDeletedFilesLimit() {
+        return deletedFilesLimit;
+    }
+
+    /**
+     * Set the 'limitValue' for max number of deleted files to display.
+     *
+     * @param value an integer representing the max number of deleted files to display.
+     */
+    public void setDeletedFilesLimit(int value) {
+        deletedFilesLimit = value;
+        saveToStorage();
+        DirectoryTreeTopComponent.getDefault().refreshContentTreeSafe();
+
+    }
+
+    /**
+     * Load deleted file preferences from the settings file.
+     */
+    private void loadFromStorage() {
+        Path settingsFile = Paths.get(PlatformUtil.getUserConfigDirectory(), SETTINGS_FILE); //NON-NLS
+        if (settingsFile.toFile().exists()) {
+            // Read the settings
+            try (InputStream inputStream = Files.newInputStream(settingsFile)) {
+                Properties props = new Properties();
+                props.load(inputStream);
+                String limitDeletedFilesValue = props.getProperty(KEY_LIMIT_DELETED_FILES);
+                if (limitDeletedFilesValue != null) {
+                    switch (limitDeletedFilesValue) {
+                        case VALUE_TRUE:
+                            limitDeletedFiles = true;
+                            break;
+                        case VALUE_FALSE:
+                            limitDeletedFiles = false;
+                            break;
+                        default:
+                            logger.log(Level.WARNING, String.format("Unexpected value '%s' for limit deleted files using value of true instead",
+                                    limitDeletedFilesValue));
+                            limitDeletedFiles = true;
+                            break;
+                    }
+                }
+                String limitValue = props.getProperty(KEY_LIMIT_VALUE);
+                try {
+                    if (limitValue != null) {
+                        deletedFilesLimit = Integer.valueOf(limitValue);
+
+                    }
+                } catch (NumberFormatException ex) {
+                    logger.log(Level.INFO, String.format("Unexpected value '%s' for limit, expected an integer using default of 10,001 instead",
+                            limitValue));
+                    deletedFilesLimit = DEFAULT_MAX_OBJECTS;
+                }
+            } catch (IOException ex) {
+                logger.log(Level.SEVERE, "Error reading deletedFilesPreferences file", ex);
+            }
+        }
+    }
+
+    /**
+     * Store deleted file preferences in the settings file.
+     */
+    private void saveToStorage() {
+        Path settingsFile = Paths.get(PlatformUtil.getUserConfigDirectory(), SETTINGS_FILE); //NON-NLS
+        Properties props = new Properties();
+        props.setProperty(KEY_LIMIT_DELETED_FILES, (limitDeletedFiles ? VALUE_TRUE : VALUE_FALSE));
+        props.setProperty(KEY_LIMIT_VALUE, String.valueOf(deletedFilesLimit));
+        try (OutputStream fos = Files.newOutputStream(settingsFile)) {
+            props.store(fos, ""); //NON-NLS
+        } catch (IOException ex) {
+            logger.log(Level.SEVERE, "Error writing deletedFilesPreferences file", ex);
+        }
+    }
+}