First implementation of the version page of the generic node editor

[lgpl/argeo-commons.git] / server / plugins / org.argeo.jcr.ui.explorer / src / main / java / org / argeo / jcr / ui / explorer / providers / FullVersioningTreeContentProvider.java

diff --git a/server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/providers/FullVersioningTreeContentProvider.java b/server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/providers/FullVersioningTreeContentProvider.java
new file mode 100644 (file)
index 0000000..e89f16e
--- /dev/null
+++ b/server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/providers/FullVersioningTreeContentProvider.java
@@ -0,0 +1,103 @@
+package org.argeo.jcr.ui.explorer.providers;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+import javax.jcr.nodetype.NodeType;
+import javax.jcr.version.Version;
+import javax.jcr.version.VersionHistory;
+import javax.jcr.version.VersionIterator;
+import javax.jcr.version.VersionManager;
+
+import org.argeo.ArgeoException;
+import org.argeo.jcr.ui.explorer.browser.ItemComparator;
+import org.eclipse.jface.viewers.ITreeContentProvider;
+import org.eclipse.jface.viewers.Viewer;
+
+/**
+ * Implementation of the {@code ITreeContentProvider} in order to display some
+ * version informations of a JCR full versionable node in a tree like structure
+ * 
+ */
+public class FullVersioningTreeContentProvider implements ITreeContentProvider {
+       // private Node rootNode;
+       private ItemComparator itemComparator = new ItemComparator();
+
+       /**
+        * Sends back the first level of the Tree. input element must be a single
+        * node object
+        */
+       public Object[] getElements(Object inputElement) {
+               try {
+                       Node rootNode = (Node) inputElement;
+                       String curPath = rootNode.getPath();
+                       VersionManager vm = rootNode.getSession().getWorkspace()
+                                       .getVersionManager();
+
+                       VersionHistory vh = vm.getVersionHistory(curPath);
+                       List<Version> result = new ArrayList<Version>();
+                       VersionIterator vi = vh.getAllLinearVersions();
+
+                       while (vi.hasNext()) {
+                               result.add(vi.nextVersion());
+                       }
+                       return result.toArray();
+               } catch (RepositoryException re) {
+                       throw new ArgeoException(
+                                       "Unexpected error while getting version elements", re);
+               }
+       }
+
+       public Object[] getChildren(Object parentElement) {
+               try {
+                       if (parentElement instanceof Version) {
+                               List<Node> tmp = new ArrayList<Node>();
+                               tmp.add(((Version) parentElement).getFrozenNode());
+                               return tmp.toArray();
+                               // Node node = ((Version) parentElement).getFrozenNode();
+                               // return new Object[] { node };
+                       }
+               } catch (RepositoryException re) {
+                       throw new ArgeoException("Unexpected error while getting child "
+                                       + "node for version element", re);
+               }
+               return null;
+       }
+
+       public Object getParent(Object element) {
+               try {
+                       // this will not work in a simpleVersionning environment, parent is
+                       // not a node.
+                       if (element instanceof Node
+                                       && ((Node) element).isNodeType(NodeType.NT_FROZEN_NODE)) {
+                               Node node = (Node) element;
+                               return node.getParent();
+                       } else
+                               return null;
+               } catch (RepositoryException e) {
+                       return null;
+               }
+       }
+
+       public boolean hasChildren(Object element) {
+               try {
+                       if (element instanceof Version)
+                               return true;
+                       else if (element instanceof Node)
+                               return ((Node) element).hasNodes();
+                       else
+                               return false;
+               } catch (RepositoryException e) {
+                       throw new ArgeoException("Cannot check children of " + element, e);
+               }
+       }
+
+       public void dispose() {
+       }
+
+       public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
+       }
+
+}