server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/editors/NodeVersionHistoryPage.java

   1 /*
   2  * Copyright (C) 2007-2012 Mathieu Baudier
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.jcr.ui.explorer.editors;
  17
  18 import java.text.DateFormat;
  19 import java.text.SimpleDateFormat;
  20 import java.util.ArrayList;
  21 import java.util.Calendar;
  22 import java.util.List;
  23 import java.util.Map;
  24
  25 import javax.jcr.Node;
  26 import javax.jcr.Property;
  27 import javax.jcr.PropertyType;
  28 import javax.jcr.RepositoryException;
  29 import javax.jcr.Value;
  30 import javax.jcr.nodetype.NodeType;
  31 import javax.jcr.version.Version;
  32 import javax.jcr.version.VersionHistory;
  33 import javax.jcr.version.VersionIterator;
  34 import javax.jcr.version.VersionManager;
  35
  36 import org.argeo.ArgeoException;
  37 import org.argeo.jcr.JcrUtils;
  38 import org.argeo.jcr.PropertyDiff;
  39 import org.argeo.jcr.VersionDiff;
  40 import org.argeo.jcr.ui.explorer.JcrExplorerConstants;
  41 import org.argeo.jcr.ui.explorer.JcrExplorerPlugin;
  42 import org.argeo.jcr.ui.explorer.providers.FullVersioningTreeContentProvider;
  43 import org.argeo.jcr.ui.explorer.providers.VersionLabelProvider;
  44 import org.argeo.jcr.ui.explorer.utils.GenericNodeDoubleClickListener;
  45 import org.eclipse.jface.viewers.ITreeContentProvider;
  46 import org.eclipse.jface.viewers.TreeViewer;
  47 import org.eclipse.swt.SWT;
  48 import org.eclipse.swt.layout.GridData;
  49 import org.eclipse.swt.layout.GridLayout;
  50 import org.eclipse.swt.widgets.Composite;
  51 import org.eclipse.swt.widgets.Text;
  52 import org.eclipse.ui.forms.AbstractFormPart;
  53 import org.eclipse.ui.forms.IManagedForm;
  54 import org.eclipse.ui.forms.editor.FormEditor;
  55 import org.eclipse.ui.forms.editor.FormPage;
  56 import org.eclipse.ui.forms.widgets.FormToolkit;
  57 import org.eclipse.ui.forms.widgets.ScrolledForm;
  58 import org.eclipse.ui.forms.widgets.Section;
  59 import org.eclipse.ui.forms.widgets.TableWrapData;
  60 import org.eclipse.ui.forms.widgets.TableWrapLayout;
  61
  62 /**
  63  * Offers two main sections : one to display a text area with a summary of all
  64  * variations between a version and its predecessor and one tree view that
  65  * enable browsing
  66  * */
  67 public class NodeVersionHistoryPage extends FormPage implements
  68                 JcrExplorerConstants {
  69         // private final static Log log = LogFactory
  70         // .getLog(NodeVersionHistoryPage.class);
  71
  72         // Utils
  73         protected DateFormat timeFormatter = new SimpleDateFormat(DATE_TIME_FORMAT);
  74
  75         // business objects
  76         private Node currentNode;
  77
  78         // this page UI components
  79         private FullVersioningTreeContentProvider nodeContentProvider;
  80         private TreeViewer nodesViewer;
  81         private FormToolkit tk;
  82
  83         public NodeVersionHistoryPage(FormEditor editor, String title,
  84                         Node currentNode) {
  85                 super(editor, "NodeVersionHistoryPage", title);
  86                 this.currentNode = currentNode;
  87         }
  88
  89         protected void createFormContent(IManagedForm managedForm) {
  90                 ScrolledForm form = managedForm.getForm();
  91                 form.setText(JcrExplorerPlugin
  92                                 .getMessage("nodeVersionHistoryPageTitle"));
  93                 tk = managedForm.getToolkit();
  94                 GridLayout twt = new GridLayout(1, false);
  95                 twt.marginWidth = twt.marginHeight = 5;
  96                 Composite body = form.getBody();
  97                 body.setLayout(twt);
  98
  99                 try {
 100                         if (!currentNode.isNodeType(NodeType.MIX_VERSIONABLE)) {
 101                                 tk.createLabel(body, JcrExplorerPlugin
 102                                                 .getMessage("warningUnversionableNode"));
 103                         } else {
 104                                 createHistorySection(form.getBody());
 105                                 createTreeSection(form.getBody());
 106                         }
 107                 } catch (RepositoryException e) {
 108                         throw new ArgeoException(
 109                                         "Unexpected error while checking if node is versionable", e);
 110                 }
 111         }
 112
 113         protected void createTreeSection(Composite parent) {
 114                 // Section Layout & MetaData
 115                 Section section = tk.createSection(parent, Section.TWISTIE);
 116                 section.setLayoutData(new GridData(GridData.FILL_BOTH));
 117                 section.setText(JcrExplorerPlugin.getMessage("versionTreeSectionTitle"));
 118
 119                 // Section Body
 120                 Composite body = tk.createComposite(section, SWT.FILL);
 121                 // WARNING : 2 following lines are compulsory or body won't be
 122                 // displayed.
 123                 body.setLayout(new GridLayout());
 124                 section.setClient(body);
 125
 126                 body.setLayoutData(new GridData(GridData.FILL_BOTH));
 127                 section.setExpanded(true);
 128
 129                 nodeContentProvider = new FullVersioningTreeContentProvider();
 130                 nodesViewer = createNodeViewer(body, nodeContentProvider);
 131                 nodesViewer.setInput(currentNode);
 132         }
 133
 134         protected TreeViewer createNodeViewer(Composite parent,
 135                         final ITreeContentProvider nodeContentProvider) {
 136
 137                 final TreeViewer tmpNodeViewer = new TreeViewer(parent, SWT.MULTI);
 138
 139                 tmpNodeViewer.getTree().setLayoutData(
 140                                 new GridData(SWT.FILL, SWT.FILL, true, true));
 141
 142                 tmpNodeViewer.setContentProvider(nodeContentProvider);
 143                 tmpNodeViewer.setLabelProvider(new VersionLabelProvider());
 144                 tmpNodeViewer
 145                                 .addDoubleClickListener(new GenericNodeDoubleClickListener(
 146                                                 tmpNodeViewer));
 147                 return tmpNodeViewer;
 148         }
 149
 150         protected void createHistorySection(Composite parent) {
 151
 152                 // Section Layout
 153                 Section section = tk.createSection(parent, Section.TWISTIE);
 154                 section.setLayoutData(new GridData(TableWrapData.FILL_GRAB));
 155                 TableWrapLayout twt = new TableWrapLayout();
 156                 section.setLayout(twt);
 157
 158                 // Set title of the section
 159                 section.setText(JcrExplorerPlugin
 160                                 .getMessage("versionHistorySectionTitle"));
 161
 162                 final Text styledText = tk.createText(section, "", SWT.FULL_SELECTION
 163                                 | SWT.BORDER | SWT.MULTI | SWT.WRAP | SWT.V_SCROLL);
 164                 styledText.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
 165                 section.setClient(styledText);
 166                 refreshHistory(styledText);
 167                 styledText.setEditable(false);
 168                 section.setExpanded(false);
 169
 170                 AbstractFormPart part = new AbstractFormPart() {
 171                         public void commit(boolean onSave) {
 172                         }
 173
 174                         public void refresh() {
 175                                 super.refresh();
 176                                 refreshHistory(styledText);
 177                         }
 178                 };
 179                 getManagedForm().addPart(part);
 180         }
 181
 182         protected void refreshHistory(Text styledText) {
 183                 try {
 184                         List<VersionDiff> lst = listHistoryDiff();
 185                         StringBuffer main = new StringBuffer("");
 186
 187                         for (int i = lst.size() - 1; i >= 0; i--) {
 188                                 if (i == 0)
 189                                         main.append("Creation (");
 190                                 else
 191                                         main.append("Update " + i + " (");
 192
 193                                 if (lst.get(i).getUserId() != null)
 194                                         main.append("UserId : " + lst.get(i).getUserId());
 195
 196                                 if (lst.get(i).getUserId() != null
 197                                                 && lst.get(i).getUpdateTime() != null)
 198                                         main.append(", ");
 199
 200                                 if (lst.get(i).getUpdateTime() != null)
 201                                         main.append("Date : "
 202                                                         + timeFormatter.format(lst.get(i).getUpdateTime()
 203                                                                         .getTime()) + ")\n");
 204
 205                                 StringBuffer buf = new StringBuffer("");
 206                                 Map<String, PropertyDiff> diffs = lst.get(i).getDiffs();
 207                                 for (String prop : diffs.keySet()) {
 208                                         PropertyDiff pd = diffs.get(prop);
 209                                         // String propName = pd.getRelPath();
 210                                         Value refValue = pd.getReferenceValue();
 211                                         Value newValue = pd.getNewValue();
 212                                         String refValueStr = "";
 213                                         String newValueStr = "";
 214
 215                                         if (refValue != null) {
 216                                                 if (refValue.getType() == PropertyType.DATE) {
 217                                                         refValueStr = timeFormatter.format(refValue
 218                                                                         .getDate().getTime());
 219                                                 } else
 220                                                         refValueStr = refValue.getString();
 221                                         }
 222                                         if (newValue != null) {
 223                                                 if (newValue.getType() == PropertyType.DATE) {
 224                                                         newValueStr = timeFormatter.format(newValue
 225                                                                         .getDate().getTime());
 226                                                 } else
 227                                                         newValueStr = newValue.getString();
 228                                         }
 229
 230                                         if (pd.getType() == PropertyDiff.MODIFIED) {
 231                                                 buf.append(prop).append(": ");
 232                                                 buf.append(refValueStr);
 233                                                 buf.append(" > ");
 234                                                 buf.append(newValueStr);
 235                                                 buf.append("\n");
 236                                         } else if (pd.getType() == PropertyDiff.ADDED
 237                                                         && !"".equals(newValueStr)) {
 238                                                 // we don't list property that have been added with an
 239                                                 // empty string as value
 240                                                 buf.append(prop).append(": ");
 241                                                 buf.append(" + ");
 242                                                 buf.append(newValueStr);
 243                                                 buf.append("\n");
 244                                         } else if (pd.getType() == PropertyDiff.REMOVED) {
 245                                                 buf.append(prop).append(": ");
 246                                                 buf.append(" - ");
 247                                                 buf.append(refValueStr);
 248                                                 buf.append("\n");
 249                                         }
 250                                 }
 251                                 buf.append("\n");
 252                                 main.append(buf);
 253                         }
 254                         styledText.setText(main.toString());
 255                 } catch (RepositoryException e) {
 256                         throw new ArgeoException("Cannot generate history for node", e);
 257                 }
 258
 259         }
 260
 261         public List<VersionDiff> listHistoryDiff() {
 262                 try {
 263                         List<VersionDiff> res = new ArrayList<VersionDiff>();
 264                         VersionManager versionManager = currentNode.getSession()
 265                                         .getWorkspace().getVersionManager();
 266                         VersionHistory versionHistory = versionManager
 267                                         .getVersionHistory(currentNode.getPath());
 268
 269                         VersionIterator vit = versionHistory.getAllLinearVersions();
 270                         while (vit.hasNext()) {
 271                                 Version version = vit.nextVersion();
 272                                 Node node = version.getFrozenNode();
 273                                 Version predecessor = null;
 274                                 try {
 275                                         predecessor = version.getLinearPredecessor();
 276                                 } catch (Exception e) {
 277                                         // no predecessor seems to throw an exception even if it
 278                                         // shouldn't...
 279                                 }
 280                                 if (predecessor == null) {// original
 281                                 } else {
 282                                         Map<String, PropertyDiff> diffs = JcrUtils.diffProperties(
 283                                                         predecessor.getFrozenNode(), node);
 284                                         if (!diffs.isEmpty()) {
 285                                                 String lastUserName = null;
 286                                                 Calendar lastUpdate = null;
 287                                                 try {
 288                                                         if (currentNode
 289                                                                         .isNodeType(NodeType.MIX_LAST_MODIFIED)) {
 290                                                                 lastUserName = node.getProperty(
 291                                                                                 Property.JCR_LAST_MODIFIED_BY)
 292                                                                                 .getString();
 293                                                                 lastUpdate = node.getProperty(
 294                                                                                 Property.JCR_LAST_MODIFIED).getDate();
 295                                                         } else
 296                                                                 lastUpdate = version.getProperty(
 297                                                                                 Property.JCR_CREATED).getDate();
 298
 299                                                 } catch (Exception e) {
 300                                                         // Silent that info is optional
 301                                                 }
 302                                                 VersionDiff vd = new VersionDiff(lastUserName,
 303                                                                 lastUpdate, diffs);
 304                                                 res.add(vd);
 305                                         }
 306                                 }
 307                         }
 308                         return res;
 309                 } catch (RepositoryException e) {
 310                         throw new ArgeoException("Cannot generate history for node ");
 311                 }
 312
 313         }
 314
 315         @Override
 316         public void setActive(boolean active) {
 317                 super.setActive(active);
 318         }
 319 }