Move to the root the bundles which will be part of v1.4 and v2.2

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

diff --git a/org.argeo.eclipse.ui/src/main/java/org/argeo/eclipse/ui/AbstractTreeContentProvider.java b/org.argeo.eclipse.ui/src/main/java/org/argeo/eclipse/ui/AbstractTreeContentProvider.java
new file mode 100644 (file)
index 0000000..6b86676
--- /dev/null
+++ b/org.argeo.eclipse.ui/src/main/java/org/argeo/eclipse/ui/AbstractTreeContentProvider.java
@@ -0,0 +1,58 @@
+/*
+ * 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.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;
+       }
+
+}