org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/jcr/VersionHistoryContentProvider.java

   1 package org.argeo.eclipse.ui.jcr;
   2
   3 import java.util.ArrayList;
   4 import java.util.Collections;
   5 import java.util.List;
   6
   7 import javax.jcr.RepositoryException;
   8 import javax.jcr.version.Version;
   9 import javax.jcr.version.VersionHistory;
  10 import javax.jcr.version.VersionIterator;
  11
  12 import org.eclipse.jface.viewers.IStructuredContentProvider;
  13 import org.eclipse.jface.viewers.Viewer;
  14
  15 /** Content provider based on a {@link VersionHistory}. */
  16 public class VersionHistoryContentProvider implements IStructuredContentProvider {
  17         private static final long serialVersionUID = -4921107883428887012L;
  18
  19         @Override
  20         public void dispose() {
  21         }
  22
  23         @Override
  24         public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
  25         }
  26
  27         @Override
  28         public Object[] getElements(Object inputElement) {
  29                 try {
  30                         VersionHistory versionHistory = (VersionHistory) inputElement;
  31                         List<Version> lst = new ArrayList<>();
  32                         VersionIterator vit = versionHistory.getAllLinearVersions();
  33                         while (vit.hasNext())
  34                                 lst.add(vit.nextVersion());
  35                         Collections.reverse(lst);
  36                         return lst.toArray();
  37                 } catch (RepositoryException e) {
  38                         throw new IllegalStateException("Cannot list versions", e);
  39                 }
  40         }
  41
  42 }