+ refactoring of the JCR UI Model (in a MVC point of view)

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

diff --git a/server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/commands/DeleteNodes.java b/server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/commands/DeleteNodes.java
new file mode 100644 (file)
index 0000000..a0e1069
--- /dev/null
+++ b/server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/commands/DeleteNodes.java
@@ -0,0 +1,83 @@
+package org.argeo.jcr.ui.explorer.commands;
+
+import java.util.Iterator;
+
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+
+import org.argeo.ArgeoException;
+import org.argeo.eclipse.ui.ErrorFeedback;
+import org.argeo.eclipse.ui.TreeParent;
+import org.argeo.jcr.ui.explorer.model.SingleJcrNode;
+import org.argeo.jcr.ui.explorer.model.WorkspaceNode;
+import org.argeo.jcr.ui.explorer.views.GenericJcrBrowser;
+import org.eclipse.core.commands.AbstractHandler;
+import org.eclipse.core.commands.ExecutionEvent;
+import org.eclipse.core.commands.ExecutionException;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.ui.handlers.HandlerUtil;
+
+/**
+ * Deletes the selected nodes: both in the JCR repository and in the UI view.
+ * Warning no check is done, except implementation dependent native checks,
+ * handle with care.
+ */
+public class DeleteNodes extends AbstractHandler {
+       public Object execute(ExecutionEvent event) throws ExecutionException {
+               ISelection selection = HandlerUtil.getActiveWorkbenchWindow(event)
+                               .getActivePage().getSelection();
+               GenericJcrBrowser view = (GenericJcrBrowser) HandlerUtil
+                               .getActiveWorkbenchWindow(event).getActivePage()
+                               .findView(HandlerUtil.getActivePartId(event));
+
+               if (selection != null && selection instanceof IStructuredSelection) {
+                       Iterator<?> it = ((IStructuredSelection) selection).iterator();
+                       Object obj = null;
+                       SingleJcrNode ancestor = null;
+                       WorkspaceNode rootAncestor = null;
+                       try {
+                               while (it.hasNext()) {
+                                       obj = it.next();
+                                       if (obj instanceof SingleJcrNode) {
+                                               // Cache objects
+                                               SingleJcrNode sjn = (SingleJcrNode) obj;
+                                               TreeParent tp = (TreeParent) sjn.getParent();
+                                               Node node = sjn.getNode();
+
+                                               // Jcr Remove
+                                               node.remove();
+                                               node.getSession().save();
+                                               // UI remove
+                                               tp.removeChild(sjn);
+
+                                               // Check if the parent is the root node
+                                               if (tp instanceof WorkspaceNode)
+                                                       rootAncestor = (WorkspaceNode) tp;
+                                               else
+                                                       ancestor = getOlder(ancestor, (SingleJcrNode) tp);
+                                       }
+                               }
+                               if (rootAncestor != null)
+                                       view.nodeRemoved(rootAncestor);
+                               else if (ancestor != null)
+                                       view.nodeRemoved(ancestor);
+                       } catch (Exception e) {
+                               ErrorFeedback.show("Cannot delete selected node ", e);
+                       }
+               }
+               return null;
+       }
+
+       private SingleJcrNode getOlder(SingleJcrNode A, SingleJcrNode B) {
+               try {
+                       if (A == null)
+                               return B == null ? null : B;
+                       // Todo enhanced this method
+                       else
+                               return A.getNode().getDepth() <= B.getNode().getDepth() ? A : B;
+               } catch (RepositoryException re) {
+                       throw new ArgeoException("Cannot find ancestor", re);
+               }
+       }
+}