Jcr Explorer refactoring and packaging

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

diff --git a/server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/browser/NodeContentProvider.java b/server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/browser/NodeContentProvider.java
new file mode 100644 (file)
index 0000000..b2bd4b7
--- /dev/null
+++ b/server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/browser/NodeContentProvider.java
@@ -0,0 +1,132 @@
+package org.argeo.jcr.ui.explorer.browser;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+
+import javax.jcr.Node;
+import javax.jcr.NodeIterator;
+import javax.jcr.Repository;
+import javax.jcr.RepositoryException;
+import javax.jcr.Session;
+
+import org.argeo.ArgeoException;
+import org.argeo.jcr.JcrUtils;
+import org.argeo.jcr.RepositoryRegister;
+import org.eclipse.jface.viewers.ITreeContentProvider;
+import org.eclipse.jface.viewers.Viewer;
+
+public class NodeContentProvider implements ITreeContentProvider {
+       private ItemComparator itemComparator = new ItemComparator();
+
+       private RepositoryRegister repositoryRegister;
+       private Session userSession;
+
+       public NodeContentProvider(Session userSession,
+                       RepositoryRegister repositoryRegister) {
+               this.userSession = userSession;
+               this.repositoryRegister = repositoryRegister;
+       }
+
+       /**
+        * Sends back the first level of the Tree. Independent from inputElement
+        * that can be null
+        */
+       public Object[] getElements(Object inputElement) {
+               List<Object> objs = new ArrayList<Object>();
+               if (userSession != null) {
+                       Node userHome = JcrUtils.getUserHome(userSession);
+                       if (userHome != null)
+                               objs.add(userHome);
+               }
+               if (repositoryRegister != null)
+                       objs.add(repositoryRegister);
+               return objs.toArray();
+       }
+
+       public Object[] getChildren(Object parentElement) {
+               if (parentElement instanceof Node) {
+                       return childrenNodes((Node) parentElement);
+               } else if (parentElement instanceof RepositoryNode) {
+                       return ((RepositoryNode) parentElement).getChildren();
+               } else if (parentElement instanceof WorkspaceNode) {
+                       Session session = ((WorkspaceNode) parentElement).getSession();
+                       if (session == null)
+                               return new Object[0];
+
+                       try {
+                               return childrenNodes(session.getRootNode());
+                       } catch (RepositoryException e) {
+                               throw new ArgeoException("Cannot retrieve root node of "
+                                               + session, e);
+                       }
+               } else if (parentElement instanceof RepositoryRegister) {
+                       RepositoryRegister repositoryRegister = (RepositoryRegister) parentElement;
+                       List<RepositoryNode> nodes = new ArrayList<RepositoryNode>();
+                       Map<String, Repository> repositories = repositoryRegister
+                                       .getRepositories();
+                       for (String name : repositories.keySet()) {
+                               nodes.add(new RepositoryNode(name, repositories.get(name)));
+                       }
+                       return nodes.toArray();
+               } else {
+                       return new Object[0];
+               }
+       }
+
+       public Object getParent(Object element) {
+               try {
+                       if (element instanceof Node) {
+                               Node node = (Node) element;
+                               if (!node.getPath().equals("/"))
+                                       return node.getParent();
+                               else
+                                       return null;
+                       }
+                       return null;
+               } catch (RepositoryException e) {
+                       return null;
+               }
+       }
+
+       public boolean hasChildren(Object element) {
+               try {
+                       if (element instanceof Node) {
+                               return ((Node) element).hasNodes();
+                       } else if (element instanceof RepositoryNode) {
+                               return ((RepositoryNode) element).hasChildren();
+                       } else if (element instanceof WorkspaceNode) {
+                               return ((WorkspaceNode) element).getSession() != null;
+                       } else if (element instanceof RepositoryRegister) {
+                               return ((RepositoryRegister) element).getRepositories().size() > 0;
+                       }
+                       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) {
+       }
+
+       protected Object[] childrenNodes(Node parentNode) {
+               try {
+                       List<Node> children = new ArrayList<Node>();
+                       NodeIterator nit = parentNode.getNodes();
+                       while (nit.hasNext()) {
+                               Node node = nit.nextNode();
+                               children.add(node);
+                       }
+                       Node[] arr = children.toArray(new Node[children.size()]);
+                       Arrays.sort(arr, itemComparator);
+                       return arr;
+               } catch (RepositoryException e) {
+                       throw new ArgeoException("Cannot list children of " + parentNode, e);
+               }
+       }
+
+}