org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/internal/tmf/ui/project/handlers/DeleteTraceHandler.java

   1 /*******************************************************************************
   2  * Copyright (c) 2009, 2010, 2011 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Francois Chouinard - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.linuxtools.internal.tmf.ui.project.handlers;
  14
  15 import java.util.Iterator;
  16 import java.util.LinkedList;
  17 import java.util.List;
  18
  19 import org.eclipse.core.commands.AbstractHandler;
  20 import org.eclipse.core.commands.ExecutionEvent;
  21 import org.eclipse.core.commands.ExecutionException;
  22 import org.eclipse.core.resources.IResource;
  23 import org.eclipse.core.runtime.CoreException;
  24 import org.eclipse.core.runtime.IPath;
  25 import org.eclipse.core.runtime.NullProgressMonitor;
  26 import org.eclipse.jface.viewers.ISelection;
  27 import org.eclipse.jface.viewers.ISelectionProvider;
  28 import org.eclipse.jface.viewers.TreeSelection;
  29 import org.eclipse.linuxtools.internal.tmf.ui.Activator;
  30 import org.eclipse.linuxtools.tmf.ui.project.model.ITmfProjectModelElement;
  31 import org.eclipse.linuxtools.tmf.ui.project.model.TmfExperimentFolder;
  32 import org.eclipse.linuxtools.tmf.ui.project.model.TmfTraceElement;
  33 import org.eclipse.linuxtools.tmf.ui.project.model.TmfTraceFolder;
  34 import org.eclipse.swt.SWT;
  35 import org.eclipse.swt.widgets.MessageBox;
  36 import org.eclipse.swt.widgets.Shell;
  37 import org.eclipse.ui.IWorkbenchPage;
  38 import org.eclipse.ui.IWorkbenchPart;
  39 import org.eclipse.ui.IWorkbenchWindow;
  40 import org.eclipse.ui.PlatformUI;
  41
  42 /**
  43  * <b><u>DeleteTraceHandler</u></b>
  44  * <p>
  45  */
  46 public class DeleteTraceHandler extends AbstractHandler {
  47
  48     private TreeSelection fSelection = null;
  49
  50     // ------------------------------------------------------------------------
  51     // Validation
  52     // ------------------------------------------------------------------------
  53
  54     @Override
  55     public boolean isEnabled() {
  56
  57         // Check if we are closing down
  58         IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  59         if (window == null) {
  60             return false;
  61         }
  62
  63         // Get the selection
  64         IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
  65         IWorkbenchPart part = page.getActivePart();
  66         ISelectionProvider selectionProvider = part.getSite().getSelectionProvider();
  67         if (selectionProvider == null) {
  68             return false;
  69         }
  70         ISelection selection = selectionProvider.getSelection();
  71
  72         // Make sure selection contains only traces
  73         fSelection = null;
  74         if (selection instanceof TreeSelection) {
  75             fSelection = (TreeSelection) selection;
  76             Iterator<Object> iterator = fSelection.iterator();
  77             while (iterator.hasNext()) {
  78                 Object element = iterator.next();
  79                 if (!(element instanceof TmfTraceElement)) {
  80                     return false;
  81                 }
  82             }
  83         }
  84
  85         // If we get here, either nothing is selected or everything is a trace
  86         return !selection.isEmpty();
  87     }
  88
  89     // ------------------------------------------------------------------------
  90     // Execution
  91     // ------------------------------------------------------------------------
  92
  93     @Override
  94     public Object execute(ExecutionEvent event) throws ExecutionException {
  95
  96         // Check if we are closing down
  97         IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  98         if (window == null) {
  99             return null;
 100         }
 101
 102         // Confirm the operation
 103         Shell shell = window.getShell();
 104         MessageBox confirmOperation = new MessageBox(shell, SWT.ICON_QUESTION | SWT.CANCEL | SWT.OK);
 105         confirmOperation.setText(Messages.DeleteDialog_Title);
 106         confirmOperation.setMessage(Messages.DeleteTraceHandler_Message);
 107         if (confirmOperation.open() != SWT.OK) {
 108             return null;
 109         }
 110
 111         Iterator<Object> iterator = fSelection.iterator();
 112         while (iterator.hasNext()) {
 113             Object element = iterator.next();
 114             if (element instanceof TmfTraceElement) {
 115                 TmfTraceElement trace = (TmfTraceElement) element;
 116                 IResource resource = trace.getResource();
 117                 try {
 118                     IPath path = resource.getLocation();
 119                     if (path != null && (trace.getParent() instanceof TmfTraceFolder)) {
 120                         String location = path.toString();
 121                         TmfExperimentFolder experimentFolder = trace.getProject().getExperimentsFolder();
 122
 123                         // Propagate the removal to traces
 124                         for (ITmfProjectModelElement experiment : experimentFolder.getChildren()) {
 125                             List<ITmfProjectModelElement> toRemove = new LinkedList<ITmfProjectModelElement>();
 126                             for (ITmfProjectModelElement child : experiment.getChildren()) {
 127                                 if (child.getResource().getLocation().toString().equals(location)) {
 128                                     toRemove.add(child);
 129                                 }
 130                             }
 131                             for (ITmfProjectModelElement child : toRemove) {
 132                                 experiment.removeChild(child);
 133                                 child.getResource().delete(true, null);
 134                             }
 135                         }
 136
 137                         // Delete supplementary files
 138                         trace.deleteSupplementaryFolder();
 139                     }
 140
 141                     // Finally, delete the trace
 142                     resource.delete(true, new NullProgressMonitor());
 143
 144                     // Refresh the project
 145                     trace.getProject().refresh();
 146
 147                 } catch (CoreException e) {
 148                     Activator.getDefault().logError("Error deleting trace: " + trace.getName(), e); //$NON-NLS-1$
 149                 }
 150             }
 151         }
 152
 153         return null;
 154     }
 155 }