plugins/org.eclipse.mat.ui/src/org/eclipse/mat/ui/snapshot/views/SnapshotOutlinePage.java - mat/org.eclipse.mat - Git at Google

 /*******************************************************************************
  * Copyright (c) 2008, 2023 SAP AG, IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *    SAP AG - initial API and implementation
  *    Andrew Johnson/IBM Corporation - com.ibm.icu fixes, notes
  *******************************************************************************/
 package org.eclipse.mat.ui.snapshot.views;

 import java.io.File;
 import java.io.Serializable;
 import java.io.UncheckedIOException;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;

 import org.eclipse.core.runtime.IPath;
 import org.eclipse.jface.action.Action;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.ITableLabelProvider;
 import org.eclipse.jface.viewers.ITreeContentProvider;
 import org.eclipse.jface.viewers.LabelProvider;
 import org.eclipse.jface.viewers.TreeViewer;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.mat.snapshot.ISnapshot;
 import org.eclipse.mat.snapshot.SnapshotInfo;
 import org.eclipse.mat.snapshot.UnreachableObjectsHistogram;
 import org.eclipse.mat.ui.accessibility.AccessibleCompositeAdapter;
 import org.eclipse.mat.ui.internal.views.NotesView;
 import org.eclipse.mat.ui.snapshot.editor.ISnapshotEditorInput;
 import org.eclipse.mat.ui.util.Copy;
 import org.eclipse.mat.util.MessageUtil;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.TreeColumn;
 import org.eclipse.ui.actions.ActionFactory;
 import org.eclipse.ui.part.IPageSite;
 import org.eclipse.ui.part.Page;
 import org.eclipse.ui.views.contentoutline.IContentOutlinePage;

 import com.ibm.icu.text.DateFormat;
 import com.ibm.icu.text.DecimalFormat;
 import com.ibm.icu.text.NumberFormat;

 public abstract class SnapshotOutlinePage extends Page implements IContentOutlinePage
 {
     public static class HeapEditorOutlinePage extends SnapshotOutlinePage implements
                     ISnapshotEditorInput.IChangeListener
     {
         private ISnapshotEditorInput snapshotInput;

         public HeapEditorOutlinePage(ISnapshotEditorInput input)
         {
             this.snapshotInput = input;
             this.snapshotInput.addChangeListener(this);
         }

         @Override
         protected void createColumns()
         {
             super.createColumns();
             TreeColumn column = new TreeColumn(treeViewer.getTree(), SWT.LEFT);
             column.setText(Messages.baseline);
             column.setWidth(80);
         }

         public void onSnapshotLoaded(ISnapshot snapshot)
         {
             updateSnapshotInput();
         }

         public void onBaselineLoaded(ISnapshot snapshot)
         {
             updateSnapshotInput();
         }

         @Override
         protected SnapshotInfo getBaseline()
         {
             return this.snapshotInput.hasBaseline() ? this.snapshotInput.getBaseline().getSnapshotInfo() : null;
         }

         @Override
         protected SnapshotInfo getSnapshot()
         {
             if (snapshotInput == null)
                 return null;
             else
                 return snapshotInput.hasSnapshot() ? snapshotInput.getSnapshot().getSnapshotInfo() : null;
         }

         @Override
         protected IPath getSnapshotPath()
         {
             if (snapshotInput == null)
                 return null;
             return this.snapshotInput.getPath();
         }

         @Override
         public void dispose()
         {
             if (snapshotInput != null)
             {
                 snapshotInput.removeChangeListener(this);
                 snapshotInput = null;
             }
             super.dispose();
         }
     }

     static class Label
     {
         String text;
         Object snapshotValue, baselineValue;

         public Label(String typeId, Object snapshotValue, Object baselineValue)
         {
             this.text = typeId;
             this.snapshotValue = snapshotValue;
             this.baselineValue = baselineValue;
         }

         public String getText()
         {
             return text;
         }

         public Object getBaselineValue()
         {
             return baselineValue;
         }

         public Object getSnapshotValue()
         {
             return snapshotValue;
         }
     }

     static class Category
     {
         String categoryId;
         protected List<Label> children = new ArrayList<Label>();

         public Category(String categoryId)
         {
             this.categoryId = categoryId;
         }

         public String getCategoryId()
         {
             return categoryId;
         }

         public void addChild(Label label)
         {
             children.add(label);
         }
     }

     static class OutlineContentProvider implements ITreeContentProvider
     {
         List<Object> elements;

         @SuppressWarnings("unchecked")
         public void inputChanged(Viewer viewer, Object oldInput, Object newInput)
         {
             elements = (List<Object>) newInput;
         }

         public Object[] getElements(Object inputElement)
         {
             return elements.toArray();
         }

         public Object[] getChildren(Object parentElement)
         {
             return parentElement instanceof Category ? ((Category) parentElement).children.toArray() : null;
         }

         public Object getParent(Object element)
         {
             return null;
         }

         public boolean hasChildren(Object element)
         {
             return element instanceof Category;
         }

         public void dispose()
         {}
     }

     static class OutlineLabelProvider extends LabelProvider implements ITableLabelProvider
     {

         public Image getColumnImage(Object element, int columnIndex)
         {
             return null;
         }

         public String getColumnText(Object element, int columnIndex)
         {
             if (element instanceof Category)
             {
                 return columnIndex == 0 ? ((Category) element).getCategoryId() : null;
             }
             else if (element instanceof Label)
             {
                 Label label = (Label) element;
                 if (columnIndex == 0)
                 {
                     return label.getText();
                 }
                 else
                 {
                     Object obj = columnIndex == 1 ? label.getSnapshotValue() : label.getBaselineValue();
                     if (obj == null)
                     {
                         return null;
                     }
                     else if (Messages.identifier_size.equals(label.getText()))
                     {
                         int identifierSize = ((Integer) obj).intValue();
                         return MessageUtil.format(Messages.identifier_format, identifierSize);
                     }
                     else if ((obj instanceof Long) || (obj instanceof Integer))
                     {
                         return ((Number) obj).longValue() == 0 ? null : NumberFormat.getInstance().format(obj);
                     }
                     else if (obj instanceof Double)
                     {
                         DecimalFormat format = new DecimalFormat("#,##0.0"); //$NON-NLS-1$
                         NumberFormat nf = NumberFormat.getNumberInstance();
                         if (nf instanceof DecimalFormat)
                         {
                             // Use the locale formatter
                             DecimalFormat df = (DecimalFormat)nf;
                             df.setMinimumFractionDigits(1);
                             df.setMaximumFractionDigits(1);
                             format = df;
                         }
                         return MessageUtil.format(MessageUtil.format(Messages.size_format, format.format(obj)));
                     }
                     else if (obj instanceof Date)
                     {
                         return Messages.date.equals(label.getText()) ? DateFormat.getDateInstance().format(obj)
                                         : DateFormat.getTimeInstance().format(obj);
                     }
                     else
                     {
                         return String.valueOf(obj);
                     }
                 }
             }

             return null;
         }
     }

     protected TreeViewer treeViewer;

     @Override
     public void createControl(Composite parent)
     {
         treeViewer = new TreeViewer(parent, SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION | SWT.MULTI);

         createColumns();

         AccessibleCompositeAdapter.access(treeViewer.getTree());

         treeViewer.getTree().setLinesVisible(true);
         treeViewer.getTree().setHeaderVisible(true);

         treeViewer.setContentProvider(new OutlineContentProvider());
         treeViewer.setLabelProvider(new OutlineLabelProvider());

         Action copyAction = new Action()
         {
             @Override
             public void run()
             {
                 Copy.copyToClipboard(treeViewer.getTree());
             }
         };
         getSite().getActionBars().setGlobalActionHandler(ActionFactory.COPY.getId(), copyAction);
         getSite().getActionBars().updateActionBars();

         updateSnapshotInput();
     }

     protected void createColumns()
     {
         TreeColumn column = new TreeColumn(treeViewer.getTree(), SWT.LEFT);
         column.setText(Messages.col_property);
         column.setWidth(160);

         column = new TreeColumn(treeViewer.getTree(), SWT.LEFT);
         column.setText(Messages.col_file);
         column.setWidth(80);
     }

     protected void updateSnapshotInput()
     {
         List<Object> elements = new ArrayList<Object>();

         SnapshotInfo info = getSnapshot();

         if (info != null)
         {
             SnapshotInfo bInfo = getBaseline();

             if (bInfo == null)
                 bInfo = new SnapshotInfo(null, null, null, 0, null, 0, 0, 0, 0, 0);

             // resource property (filename)
             int p = info.getPath().lastIndexOf(File.separatorChar);
             String filename = p >= 0 ? info.getPath().substring(p + 1) : info.getPath();
             String bFilename = null;
             if (bInfo.getPath() != null)
             {
                 p = bInfo.getPath().lastIndexOf(File.separatorChar);
                 bFilename = p >= 0 ? bInfo.getPath().substring(p + 1) : bInfo.getPath();
             }
             elements.add(new Label(Messages.resource, filename, bFilename));

             Category category = new Category(Messages.general_info);
             elements.add(category);

             category.addChild(new Label(Messages.format, info.getProperty("$heapFormat"), bInfo //$NON-NLS-1$
                             .getProperty("$heapFormat"))); //$NON-NLS-1$
             category.addChild(new Label(Messages.jvm_version, info.getJvmInfo(), bInfo.getJvmInfo()));
             category.addChild(new Label(Messages.time, info.getCreationDate(), bInfo.getCreationDate()));
             category.addChild(new Label(Messages.date, info.getCreationDate(), bInfo.getCreationDate()));
             category.addChild(new Label(Messages.identifier_size, info.getIdentifierSize(), bInfo.getIdentifierSize()));
             if (info.getIdentifierSize() == 8 || bInfo.getIdentifierSize() == 8)
             {
                 Boolean useCompressedOops = (Boolean) info.getProperty("$useCompressedOops"); //$NON-NLS-1$
                 Boolean buseCompressedOops = (Boolean) bInfo.getProperty("$useCompressedOops"); //$NON-NLS-1$
                 if (useCompressedOops != null || buseCompressedOops != null)
                 {
                     category.addChild(new Label(Messages.use_compressed_oops, useCompressedOops != null ? useCompressedOops.toString() : "",  //$NON-NLS-1$
                                     buseCompressedOops != null ? buseCompressedOops.toString() : "")); //$NON-NLS-1$
                 }
             }
             category.addChild(new Label(Messages.file_path, info.getPath(), bInfo.getPath()));
             Double fileLength = Double.valueOf((double) new File(info.getPath()).length() / (1024 * 1024));
             Double bFileLength = bInfo.getPath() != null ? Double.valueOf((double) new File(bInfo.getPath()).length()
                             / (1024 * 1024)) : null;
             category.addChild(new Label(Messages.file_length, fileLength, bFileLength));
             if (info.getProperty("$runtimeId") != null || bInfo.getProperty("$runtimeId") != null)  //$NON-NLS-1$//$NON-NLS-2$
             {
                 category.addChild(new Label(Messages.identifier, info.getProperty("$runtimeId"), bInfo //$NON-NLS-1$
                                 .getProperty("$runtimeId"))); //$NON-NLS-1$
             }
             Serializable discard_ratio = info.getProperty("discard_ratio"); //$NON-NLS-1$
             Serializable bDiscard_ratio = bInfo.getProperty("discard_ratio"); //$NON-NLS-1$
             if (discard_ratio instanceof Integer && (Integer)discard_ratio != 0 ||
                 bDiscard_ratio instanceof Integer && (Integer)bDiscard_ratio != 0)
             {
                 category.addChild(new Label(org.eclipse.mat.ui.Messages.UIPreferencePage_DiscardPercentage, discard_ratio, bDiscard_ratio));

                 Serializable discard_pattern = info.getProperty("discard_pattern"); //$NON-NLS-1$
                 Serializable bDiscard_pattern = bInfo.getProperty("discard_pattern"); //$NON-NLS-1$
                 category.addChild(new Label(org.eclipse.mat.ui.Messages.UIPreferencePage_DiscardPattern, discard_pattern, bDiscard_pattern));

                 Serializable discard_offset = info.getProperty("discard_offset"); //$NON-NLS-1$
                 Serializable bDiscard_offset = bInfo.getProperty("discard_offset"); //$NON-NLS-1$
                 category.addChild(new Label(org.eclipse.mat.ui.Messages.UIPreferencePage_DiscardOffset, discard_offset, bDiscard_offset));

                 Serializable discard_seed = info.getProperty("discard_seed"); //$NON-NLS-1$
                 Serializable bDiscard_seed = bInfo.getProperty("discard_seed"); //$NON-NLS-1$
                 category.addChild(new Label(org.eclipse.mat.ui.Messages.UIPreferencePage_DiscardSeed, discard_seed, bDiscard_seed));
             }
             String note = getNotes(info);
             String noteb = getNotes(bInfo);
             if (note != null || noteb != null)
                 category.addChild(new Label(Messages.notes, note, noteb));

             category = new Category(Messages.statistic_info);
             elements.add(category);

             category.addChild(new Label(Messages.heap, info.getUsedHeapSize(), bInfo.getUsedHeapSize()));
             category.addChild(new Label(Messages.number_of_objects, info.getNumberOfObjects(), bInfo
                             .getNumberOfObjects()));
             category.addChild(new Label(Messages.number_of_classes, info.getNumberOfClasses(), bInfo
                             .getNumberOfClasses()));
             category.addChild(new Label(Messages.number_of_classloaders, info.getNumberOfClassLoaders(), bInfo
                             .getNumberOfClassLoaders()));
             category.addChild(new Label(Messages.number_of_gc_roots, info.getNumberOfGCRoots(), bInfo
                             .getNumberOfGCRoots()));
             long u[] = unreachableObjects(info);
             long bU[] = unreachableObjects(bInfo);
             long unreachableObjects = u[0];
             long bUnreachableObjects = bU[0];
             if (unreachableObjects > 0 || bUnreachableObjects > 0)
             {
                 category.addChild(new Label(Messages.unreachable_heap, u[1], bU[1]));
                 category.addChild(new Label(Messages.number_of_unreachable_objects, unreachableObjects, bUnreachableObjects));
             }

         }
         else if (getSnapshotPath() != null)
         {
             // create tree from file information
             IPath path = getSnapshotPath();
             File osFile = path.toFile();

             elements.add(new Label(Messages.resource, path.lastSegment(), null));

             Category category = new Category(Messages.general_info);
             elements.add(category);
             category.addChild(new Label(Messages.format, null, null));
             category.addChild(new Label(Messages.jvm_version, null, null));
             category.addChild(new Label(Messages.time, new Date(osFile.lastModified()), null));
             category.addChild(new Label(Messages.date, new Date(osFile.lastModified()), null));
             category.addChild(new Label(Messages.identifier_size, null, null));
             category.addChild(new Label(Messages.file_path, path.toOSString(), null));

             final Double fileLength = Double.valueOf((double) osFile.length() / (1024 * 1024));
             category.addChild(new Label(Messages.file_length, fileLength, null));
             String note = getNotes(osFile);
             if (note != null)
                 category.addChild(new Label(Messages.notes, note, null));
         }

         treeViewer.getTree().setRedraw(false);
         treeViewer.setInput(elements);
         treeViewer.expandAll();
         treeViewer.getTree().setRedraw(true);
     }

     private String getNotes(SnapshotInfo info)
     {
         if (info != null)
         {
             String path = info.getPath();
             String pfx = info.getPrefix();
             if (path == null)
                 return null;
             // See SnapshotHistoryFile#openFile
             if (pfx != null && info.getProperty("$runtimeId") != null) //$NON-NLS-1$
             {
                 return getNotes(new File(pfx + "index")); //$NON-NLS-1$
             }
             else
             {
                 // New location
                 String notes = getNotes(new File(pfx));
                 if (notes != null)
                     return notes;
                 // Old location (might be the same)
                 return getNotes(new File(path));
             }
         }
         return null;
     }

     private String getNotes(File snapshotFile)
     {
         String notes;
         try
         {
             notes = NotesView.readNotes(snapshotFile);
         }
         catch (UncheckedIOException e)
         {
             return null;
         }
         // Just use the first line
         if (notes != null)
             return notes.split("\n", 2)[0]; //$NON-NLS-1$
         return null;
     }

     private long[] unreachableObjects(SnapshotInfo info)
     {
         long discardedObjects = 0;
         long discardedHeap = 0;
         Serializable unreachable = info.getProperty(UnreachableObjectsHistogram.class.getName());
         if (unreachable instanceof UnreachableObjectsHistogram)
         {
             UnreachableObjectsHistogram ur = (UnreachableObjectsHistogram)unreachable;
             for(UnreachableObjectsHistogram.Record r : ur.getRecords()) {
                 discardedObjects += r.getObjectCount();
                 discardedHeap += r.getShallowHeapSize();
             }
         }
         return new long[] {discardedObjects,discardedHeap};
     }

     protected abstract IPath getSnapshotPath();

     protected abstract SnapshotInfo getSnapshot();

     protected abstract SnapshotInfo getBaseline();

     @Override
     public Control getControl()
     {
         return treeViewer.getControl();
     }

     @Override
     public void setFocus()
     {
         treeViewer.getControl().setFocus();
     }

     public void addSelectionChangedListener(ISelectionChangedListener listener)
     {
         treeViewer.addSelectionChangedListener(listener);
     }

     public ISelection getSelection()
     {
         return treeViewer.getSelection();
     }

     public void removeSelectionChangedListener(ISelectionChangedListener listener)
     {
         treeViewer.removeSelectionChangedListener(listener);
     }

     public void setSelection(ISelection selection)
     {
         treeViewer.setSelection(selection);
     }

     /*
      * (non-Javadoc)
      * @see
      * org.eclipse.ui.part.IPageBookViewPage#init(org.eclipse.ui.part.IPageSite)
      */
     @Override
     public void init(IPageSite pageSite)
     {
         super.init(pageSite);
         pageSite.setSelectionProvider(this);
     }

 }
	/*******************************************************************************
	* Copyright (c) 2008, 2023 SAP AG, IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* SAP AG - initial API and implementation
	* Andrew Johnson/IBM Corporation - com.ibm.icu fixes, notes
	*******************************************************************************/
	package org.eclipse.mat.ui.snapshot.views;

	import java.io.File;
	import java.io.Serializable;
	import java.io.UncheckedIOException;
	import java.util.ArrayList;
	import java.util.Date;
	import java.util.List;

	import org.eclipse.core.runtime.IPath;
	import org.eclipse.jface.action.Action;
	import org.eclipse.jface.viewers.ISelection;
	import org.eclipse.jface.viewers.ISelectionChangedListener;
	import org.eclipse.jface.viewers.ITableLabelProvider;
	import org.eclipse.jface.viewers.ITreeContentProvider;
	import org.eclipse.jface.viewers.LabelProvider;
	import org.eclipse.jface.viewers.TreeViewer;
	import org.eclipse.jface.viewers.Viewer;
	import org.eclipse.mat.snapshot.ISnapshot;
	import org.eclipse.mat.snapshot.SnapshotInfo;
	import org.eclipse.mat.snapshot.UnreachableObjectsHistogram;
	import org.eclipse.mat.ui.accessibility.AccessibleCompositeAdapter;
	import org.eclipse.mat.ui.internal.views.NotesView;
	import org.eclipse.mat.ui.snapshot.editor.ISnapshotEditorInput;
	import org.eclipse.mat.ui.util.Copy;
	import org.eclipse.mat.util.MessageUtil;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.TreeColumn;
	import org.eclipse.ui.actions.ActionFactory;
	import org.eclipse.ui.part.IPageSite;
	import org.eclipse.ui.part.Page;
	import org.eclipse.ui.views.contentoutline.IContentOutlinePage;

	import com.ibm.icu.text.DateFormat;
	import com.ibm.icu.text.DecimalFormat;
	import com.ibm.icu.text.NumberFormat;

	public abstract class SnapshotOutlinePage extends Page implements IContentOutlinePage
	{
	public static class HeapEditorOutlinePage extends SnapshotOutlinePage implements
	ISnapshotEditorInput.IChangeListener
	{
	private ISnapshotEditorInput snapshotInput;

	public HeapEditorOutlinePage(ISnapshotEditorInput input)
	{
	this.snapshotInput = input;
	this.snapshotInput.addChangeListener(this);
	}

	@Override
	protected void createColumns()
	{
	super.createColumns();
	TreeColumn column = new TreeColumn(treeViewer.getTree(), SWT.LEFT);
	column.setText(Messages.baseline);
	column.setWidth(80);
	}

	public void onSnapshotLoaded(ISnapshot snapshot)
	{
	updateSnapshotInput();
	}

	public void onBaselineLoaded(ISnapshot snapshot)
	{
	updateSnapshotInput();
	}

	@Override
	protected SnapshotInfo getBaseline()
	{
	return this.snapshotInput.hasBaseline() ? this.snapshotInput.getBaseline().getSnapshotInfo() : null;
	}

	@Override
	protected SnapshotInfo getSnapshot()
	{
	if (snapshotInput == null)
	return null;
	else
	return snapshotInput.hasSnapshot() ? snapshotInput.getSnapshot().getSnapshotInfo() : null;
	}

	@Override
	protected IPath getSnapshotPath()
	{
	if (snapshotInput == null)
	return null;
	return this.snapshotInput.getPath();
	}

	@Override
	public void dispose()
	{
	if (snapshotInput != null)
	{
	snapshotInput.removeChangeListener(this);
	snapshotInput = null;
	}
	super.dispose();
	}
	}

	static class Label
	{
	String text;
	Object snapshotValue, baselineValue;

	public Label(String typeId, Object snapshotValue, Object baselineValue)
	{
	this.text = typeId;
	this.snapshotValue = snapshotValue;
	this.baselineValue = baselineValue;
	}

	public String getText()
	{
	return text;
	}

	public Object getBaselineValue()
	{
	return baselineValue;
	}

	public Object getSnapshotValue()
	{
	return snapshotValue;
	}
	}

	static class Category
	{
	String categoryId;
	protected List<Label> children = new ArrayList<Label>();

	public Category(String categoryId)
	{
	this.categoryId = categoryId;
	}

	public String getCategoryId()
	{
	return categoryId;
	}

	public void addChild(Label label)
	{
	children.add(label);
	}
	}

	static class OutlineContentProvider implements ITreeContentProvider
	{
	List<Object> elements;

	@SuppressWarnings("unchecked")
	public void inputChanged(Viewer viewer, Object oldInput, Object newInput)
	{
	elements = (List<Object>) newInput;
	}

	public Object[] getElements(Object inputElement)
	{
	return elements.toArray();
	}

	public Object[] getChildren(Object parentElement)
	{
	return parentElement instanceof Category ? ((Category) parentElement).children.toArray() : null;
	}

	public Object getParent(Object element)
	{
	return null;
	}

	public boolean hasChildren(Object element)
	{
	return element instanceof Category;
	}

	public void dispose()
	{}
	}

	static class OutlineLabelProvider extends LabelProvider implements ITableLabelProvider
	{

	public Image getColumnImage(Object element, int columnIndex)
	{
	return null;
	}

	public String getColumnText(Object element, int columnIndex)
	{
	if (element instanceof Category)
	{
	return columnIndex == 0 ? ((Category) element).getCategoryId() : null;
	}
	else if (element instanceof Label)
	{
	Label label = (Label) element;
	if (columnIndex == 0)
	{
	return label.getText();
	}
	else
	{
	Object obj = columnIndex == 1 ? label.getSnapshotValue() : label.getBaselineValue();
	if (obj == null)
	{
	return null;
	}
	else if (Messages.identifier_size.equals(label.getText()))
	{
	int identifierSize = ((Integer) obj).intValue();
	return MessageUtil.format(Messages.identifier_format, identifierSize);
	}
	else if ((obj instanceof Long) \|\| (obj instanceof Integer))
	{
	return ((Number) obj).longValue() == 0 ? null : NumberFormat.getInstance().format(obj);
	}
	else if (obj instanceof Double)
	{
	DecimalFormat format = new DecimalFormat("#,##0.0"); //$NON-NLS-1$
	NumberFormat nf = NumberFormat.getNumberInstance();
	if (nf instanceof DecimalFormat)
	{
	// Use the locale formatter
	DecimalFormat df = (DecimalFormat)nf;
	df.setMinimumFractionDigits(1);
	df.setMaximumFractionDigits(1);
	format = df;
	}
	return MessageUtil.format(MessageUtil.format(Messages.size_format, format.format(obj)));
	}
	else if (obj instanceof Date)
	{
	return Messages.date.equals(label.getText()) ? DateFormat.getDateInstance().format(obj)
	: DateFormat.getTimeInstance().format(obj);
	}
	else
	{
	return String.valueOf(obj);
	}
	}
	}

	return null;
	}
	}

	protected TreeViewer treeViewer;

	@Override
	public void createControl(Composite parent)
	{
	treeViewer = new TreeViewer(parent, SWT.H_SCROLL \| SWT.V_SCROLL \| SWT.FULL_SELECTION \| SWT.MULTI);

	createColumns();

	AccessibleCompositeAdapter.access(treeViewer.getTree());

	treeViewer.getTree().setLinesVisible(true);
	treeViewer.getTree().setHeaderVisible(true);

	treeViewer.setContentProvider(new OutlineContentProvider());
	treeViewer.setLabelProvider(new OutlineLabelProvider());

	Action copyAction = new Action()
	{
	@Override
	public void run()
	{
	Copy.copyToClipboard(treeViewer.getTree());
	}
	};
	getSite().getActionBars().setGlobalActionHandler(ActionFactory.COPY.getId(), copyAction);
	getSite().getActionBars().updateActionBars();

	updateSnapshotInput();
	}

	protected void createColumns()
	{
	TreeColumn column = new TreeColumn(treeViewer.getTree(), SWT.LEFT);
	column.setText(Messages.col_property);
	column.setWidth(160);

	column = new TreeColumn(treeViewer.getTree(), SWT.LEFT);
	column.setText(Messages.col_file);
	column.setWidth(80);
	}

	protected void updateSnapshotInput()
	{
	List<Object> elements = new ArrayList<Object>();

	SnapshotInfo info = getSnapshot();

	if (info != null)
	{
	SnapshotInfo bInfo = getBaseline();

	if (bInfo == null)
	bInfo = new SnapshotInfo(null, null, null, 0, null, 0, 0, 0, 0, 0);

	// resource property (filename)
	int p = info.getPath().lastIndexOf(File.separatorChar);
	String filename = p >= 0 ? info.getPath().substring(p + 1) : info.getPath();
	String bFilename = null;
	if (bInfo.getPath() != null)
	{
	p = bInfo.getPath().lastIndexOf(File.separatorChar);
	bFilename = p >= 0 ? bInfo.getPath().substring(p + 1) : bInfo.getPath();
	}
	elements.add(new Label(Messages.resource, filename, bFilename));

	Category category = new Category(Messages.general_info);
	elements.add(category);

	category.addChild(new Label(Messages.format, info.getProperty("$heapFormat"), bInfo //$NON-NLS-1$
	.getProperty("$heapFormat"))); //$NON-NLS-1$
	category.addChild(new Label(Messages.jvm_version, info.getJvmInfo(), bInfo.getJvmInfo()));
	category.addChild(new Label(Messages.time, info.getCreationDate(), bInfo.getCreationDate()));
	category.addChild(new Label(Messages.date, info.getCreationDate(), bInfo.getCreationDate()));
	category.addChild(new Label(Messages.identifier_size, info.getIdentifierSize(), bInfo.getIdentifierSize()));
	if (info.getIdentifierSize() == 8 \|\| bInfo.getIdentifierSize() == 8)
	{
	Boolean useCompressedOops = (Boolean) info.getProperty("$useCompressedOops"); //$NON-NLS-1$
	Boolean buseCompressedOops = (Boolean) bInfo.getProperty("$useCompressedOops"); //$NON-NLS-1$
	if (useCompressedOops != null \|\| buseCompressedOops != null)
	{
	category.addChild(new Label(Messages.use_compressed_oops, useCompressedOops != null ? useCompressedOops.toString() : "", //$NON-NLS-1$
	buseCompressedOops != null ? buseCompressedOops.toString() : "")); //$NON-NLS-1$
	}
	}
	category.addChild(new Label(Messages.file_path, info.getPath(), bInfo.getPath()));
	Double fileLength = Double.valueOf((double) new File(info.getPath()).length() / (1024 * 1024));
	Double bFileLength = bInfo.getPath() != null ? Double.valueOf((double) new File(bInfo.getPath()).length()
	/ (1024 * 1024)) : null;
	category.addChild(new Label(Messages.file_length, fileLength, bFileLength));
	if (info.getProperty("$runtimeId") != null \|\| bInfo.getProperty("$runtimeId") != null) //$NON-NLS-1$//$NON-NLS-2$
	{
	category.addChild(new Label(Messages.identifier, info.getProperty("$runtimeId"), bInfo //$NON-NLS-1$
	.getProperty("$runtimeId"))); //$NON-NLS-1$
	}
	Serializable discard_ratio = info.getProperty("discard_ratio"); //$NON-NLS-1$
	Serializable bDiscard_ratio = bInfo.getProperty("discard_ratio"); //$NON-NLS-1$
	if (discard_ratio instanceof Integer && (Integer)discard_ratio != 0 \|\|
	bDiscard_ratio instanceof Integer && (Integer)bDiscard_ratio != 0)
	{
	category.addChild(new Label(org.eclipse.mat.ui.Messages.UIPreferencePage_DiscardPercentage, discard_ratio, bDiscard_ratio));

	Serializable discard_pattern = info.getProperty("discard_pattern"); //$NON-NLS-1$
	Serializable bDiscard_pattern = bInfo.getProperty("discard_pattern"); //$NON-NLS-1$
	category.addChild(new Label(org.eclipse.mat.ui.Messages.UIPreferencePage_DiscardPattern, discard_pattern, bDiscard_pattern));

	Serializable discard_offset = info.getProperty("discard_offset"); //$NON-NLS-1$
	Serializable bDiscard_offset = bInfo.getProperty("discard_offset"); //$NON-NLS-1$
	category.addChild(new Label(org.eclipse.mat.ui.Messages.UIPreferencePage_DiscardOffset, discard_offset, bDiscard_offset));

	Serializable discard_seed = info.getProperty("discard_seed"); //$NON-NLS-1$
	Serializable bDiscard_seed = bInfo.getProperty("discard_seed"); //$NON-NLS-1$
	category.addChild(new Label(org.eclipse.mat.ui.Messages.UIPreferencePage_DiscardSeed, discard_seed, bDiscard_seed));
	}
	String note = getNotes(info);
	String noteb = getNotes(bInfo);
	if (note != null \|\| noteb != null)
	category.addChild(new Label(Messages.notes, note, noteb));

	category = new Category(Messages.statistic_info);
	elements.add(category);

	category.addChild(new Label(Messages.heap, info.getUsedHeapSize(), bInfo.getUsedHeapSize()));
	category.addChild(new Label(Messages.number_of_objects, info.getNumberOfObjects(), bInfo
	.getNumberOfObjects()));
	category.addChild(new Label(Messages.number_of_classes, info.getNumberOfClasses(), bInfo
	.getNumberOfClasses()));
	category.addChild(new Label(Messages.number_of_classloaders, info.getNumberOfClassLoaders(), bInfo
	.getNumberOfClassLoaders()));
	category.addChild(new Label(Messages.number_of_gc_roots, info.getNumberOfGCRoots(), bInfo
	.getNumberOfGCRoots()));
	long u[] = unreachableObjects(info);
	long bU[] = unreachableObjects(bInfo);
	long unreachableObjects = u[0];
	long bUnreachableObjects = bU[0];
	if (unreachableObjects > 0 \|\| bUnreachableObjects > 0)
	{
	category.addChild(new Label(Messages.unreachable_heap, u[1], bU[1]));
	category.addChild(new Label(Messages.number_of_unreachable_objects, unreachableObjects, bUnreachableObjects));
	}

	}
	else if (getSnapshotPath() != null)
	{
	// create tree from file information
	IPath path = getSnapshotPath();
	File osFile = path.toFile();

	elements.add(new Label(Messages.resource, path.lastSegment(), null));

	Category category = new Category(Messages.general_info);
	elements.add(category);
	category.addChild(new Label(Messages.format, null, null));
	category.addChild(new Label(Messages.jvm_version, null, null));
	category.addChild(new Label(Messages.time, new Date(osFile.lastModified()), null));
	category.addChild(new Label(Messages.date, new Date(osFile.lastModified()), null));
	category.addChild(new Label(Messages.identifier_size, null, null));
	category.addChild(new Label(Messages.file_path, path.toOSString(), null));

	final Double fileLength = Double.valueOf((double) osFile.length() / (1024 * 1024));
	category.addChild(new Label(Messages.file_length, fileLength, null));
	String note = getNotes(osFile);
	if (note != null)
	category.addChild(new Label(Messages.notes, note, null));
	}

	treeViewer.getTree().setRedraw(false);
	treeViewer.setInput(elements);
	treeViewer.expandAll();
	treeViewer.getTree().setRedraw(true);
	}

	private String getNotes(SnapshotInfo info)
	{
	if (info != null)
	{
	String path = info.getPath();
	String pfx = info.getPrefix();
	if (path == null)
	return null;
	// See SnapshotHistoryFile#openFile
	if (pfx != null && info.getProperty("$runtimeId") != null) //$NON-NLS-1$
	{
	return getNotes(new File(pfx + "index")); //$NON-NLS-1$
	}
	else
	{
	// New location
	String notes = getNotes(new File(pfx));
	if (notes != null)
	return notes;
	// Old location (might be the same)
	return getNotes(new File(path));
	}
	}
	return null;
	}

	private String getNotes(File snapshotFile)
	{
	String notes;
	try
	{
	notes = NotesView.readNotes(snapshotFile);
	}
	catch (UncheckedIOException e)
	{
	return null;
	}
	// Just use the first line
	if (notes != null)
	return notes.split("\n", 2)[0]; //$NON-NLS-1$
	return null;
	}

	private long[] unreachableObjects(SnapshotInfo info)
	{
	long discardedObjects = 0;
	long discardedHeap = 0;
	Serializable unreachable = info.getProperty(UnreachableObjectsHistogram.class.getName());
	if (unreachable instanceof UnreachableObjectsHistogram)
	{
	UnreachableObjectsHistogram ur = (UnreachableObjectsHistogram)unreachable;
	for(UnreachableObjectsHistogram.Record r : ur.getRecords()) {
	discardedObjects += r.getObjectCount();
	discardedHeap += r.getShallowHeapSize();
	}
	}
	return new long[] {discardedObjects,discardedHeap};
	}

	protected abstract IPath getSnapshotPath();

	protected abstract SnapshotInfo getSnapshot();

	protected abstract SnapshotInfo getBaseline();

	@Override
	public Control getControl()
	{
	return treeViewer.getControl();
	}

	@Override
	public void setFocus()
	{
	treeViewer.getControl().setFocus();
	}

	public void addSelectionChangedListener(ISelectionChangedListener listener)
	{
	treeViewer.addSelectionChangedListener(listener);
	}

	public ISelection getSelection()
	{
	return treeViewer.getSelection();
	}

	public void removeSelectionChangedListener(ISelectionChangedListener listener)
	{
	treeViewer.removeSelectionChangedListener(listener);
	}

	public void setSelection(ISelection selection)
	{
	treeViewer.setSelection(selection);
	}

	/*
	* (non-Javadoc)
	* @see
	* org.eclipse.ui.part.IPageBookViewPage#init(org.eclipse.ui.part.IPageSite)
	*/
	@Override
	public void init(IPageSite pageSite)
	{
	super.init(pageSite);
	pageSite.setSelectionProvider(this);
	}

	}