Put Eclipse and JCR components in subdirs in order to clarify indirect

[lgpl/argeo-commons.git] / eclipse / org.argeo.cms.swt / src / org / argeo / eclipse / ui / AbstractTreeContentProvider.java

diff --git a/eclipse/org.argeo.cms.swt/src/org/argeo/eclipse/ui/AbstractTreeContentProvider.java b/eclipse/org.argeo.cms.swt/src/org/argeo/eclipse/ui/AbstractTreeContentProvider.java
new file mode 100644 (file)
index 0000000..c882eb7
--- /dev/null
+++ b/eclipse/org.argeo.cms.swt/src/org/argeo/eclipse/ui/AbstractTreeContentProvider.java
@@ -0,0 +1,42 @@
+package org.argeo.eclipse.ui;
+
+import org.eclipse.jface.viewers.ITreeContentProvider;
+import org.eclipse.jface.viewers.Viewer;
+
+/**
+ * Tree content provider dealing with tree objects and providing reasonable
+ * defaults.
+ */
+public abstract class AbstractTreeContentProvider implements
+               ITreeContentProvider {
+       private static final long serialVersionUID = 8246126401957763868L;
+
+       /** Does nothing */
+       public void dispose() {
+       }
+
+       /** Does nothing */
+       public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
+       }
+
+       public Object[] getChildren(Object element) {
+               if (element instanceof TreeParent) {
+                       return ((TreeParent) element).getChildren();
+               }
+               return new Object[0];
+       }
+
+       public Object getParent(Object element) {
+               if (element instanceof TreeParent) {
+                       return ((TreeParent) element).getParent();
+               }
+               return null;
+       }
+
+       public boolean hasChildren(Object element) {
+               if (element instanceof TreeParent) {
+                       return ((TreeParent) element).hasChildren();
+               }
+               return false;
+       }
+}
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