Refactor JCR low-level components and icons

[lgpl/argeo-commons.git] / org.argeo.cms.ui / src / org / argeo / cms / ui / jcr / JcrTreeContentProvider.java

diff --git a/org.argeo.cms.ui/src/org/argeo/cms/ui/jcr/JcrTreeContentProvider.java b/org.argeo.cms.ui/src/org/argeo/cms/ui/jcr/JcrTreeContentProvider.java
new file mode 100644 (file)
index 0000000..f45e876
--- /dev/null
+++ b/org.argeo.cms.ui/src/org/argeo/cms/ui/jcr/JcrTreeContentProvider.java
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.argeo.cms.ui.jcr;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import javax.jcr.Node;
+import javax.jcr.NodeIterator;
+import javax.jcr.RepositoryException;
+
+import org.argeo.eclipse.ui.EclipseUiException;
+import org.argeo.eclipse.ui.jcr.utils.JcrItemsComparator;
+import org.eclipse.jface.viewers.ITreeContentProvider;
+import org.eclipse.jface.viewers.Viewer;
+
+/**
+ * Implementation of the {@code ITreeContentProvider} in order to display a
+ * single JCR node and its children in a tree like structure
+ */
+public class JcrTreeContentProvider implements ITreeContentProvider {
+       private static final long serialVersionUID = -2128326504754297297L;
+       // private Node rootNode;
+       private JcrItemsComparator itemComparator = new JcrItemsComparator();
+
+       /**
+        * 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;
+                       List<Node> result = new ArrayList<Node>();
+                       NodeIterator ni = rootNode.getNodes();
+                       while (ni.hasNext())
+                               result.add(ni.nextNode());
+                       return result.toArray();
+               } catch (RepositoryException re) {
+                       throw new EclipseUiException("Unable to retrieve elements for " + inputElement, re);
+               }
+       }
+
+       public Object[] getChildren(Object parentElement) {
+               return childrenNodes((Node) parentElement);
+       }
+
+       public Object getParent(Object element) {
+               try {
+                       Node node = (Node) element;
+                       if (!node.getPath().equals("/"))
+                               return node.getParent();
+                       else
+                               return null;
+               } catch (RepositoryException e) {
+                       return null;
+               }
+       }
+
+       public boolean hasChildren(Object element) {
+               try {
+                       return ((Node) element).hasNodes();
+               } catch (RepositoryException e) {
+                       throw new EclipseUiException("Cannot check children existence on " + element, e);
+               }
+       }
+
+       protected Object[] childrenNodes(Node parentNode) {
+               try {
+                       List<Node> children = new ArrayList<Node>();
+                       NodeIterator nit = parentNode.getNodes();
+                       while (nit.hasNext())
+                               children.add(nit.nextNode());
+                       Node[] arr = children.toArray(new Node[0]);
+                       Arrays.sort(arr, itemComparator);
+                       return arr;
+               } catch (RepositoryException e) {
+                       throw new EclipseUiException("Cannot list children of " + parentNode, e);
+               }
+       }
+
+       public void dispose() {
+       }
+
+       public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
+       }
+}