1 files changed, 58 insertions, 0 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.ui/src/org/eclipse/jpt/ui/internal/jface/DelegatingTreeContentAndLabelProvider.java b/jpa/plugins/org.eclipse.jpt.ui/src/org/eclipse/jpt/ui/internal/jface/DelegatingTreeContentAndLabelProvider.java
new file mode 100644
index 0000000000..a99645a978
--- /dev/null
+++ b/jpa/plugins/org.eclipse.jpt.ui/src/org/eclipse/jpt/ui/internal/jface/DelegatingTreeContentAndLabelProvider.java
@@ -0,0 +1,58 @@
+/*******************************************************************************
+ *  Copyright (c) 2007, 2009 Oracle. 
+ *  All rights reserved.  This program and the accompanying materials 
+ *  are made available under the terms of the Eclipse Public License v1.0 
+ *  which accompanies this distribution, and is available at 
+ *  http://www.eclipse.org/legal/epl-v10.html
+ *  
+ *  Contributors: 
+ *  	Oracle - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jpt.ui.internal.jface;
+
+import org.eclipse.jface.viewers.ITreeContentProvider;
+import org.eclipse.jpt.ui.jface.DelegatingContentAndLabelProvider;
+import org.eclipse.jpt.ui.jface.ItemLabelProviderFactory;
+import org.eclipse.jpt.ui.jface.TreeItemContentProvider;
+import org.eclipse.jpt.ui.jface.TreeItemContentProviderFactory;
+
+/**
+ * Extension of {@link DelegatingContentAndLabelProvider} that provides an extension
+ * to provide tree content
+ */
+public class DelegatingTreeContentAndLabelProvider 
+	extends DelegatingContentAndLabelProvider
+	implements ITreeContentProvider
+{
+	public DelegatingTreeContentAndLabelProvider(
+			TreeItemContentProviderFactory treeItemContentProviderFactory) {
+		super(treeItemContentProviderFactory);
+	}
+	
+	public DelegatingTreeContentAndLabelProvider(
+			TreeItemContentProviderFactory treeItemContentProviderFactory,
+			ItemLabelProviderFactory itemLabelProviderFactory) {
+		super(treeItemContentProviderFactory, itemLabelProviderFactory);
+	}
+	
+	
+	@Override
+	protected TreeItemContentProvider itemContentProvider(Object item) {
+		return (TreeItemContentProvider) super.itemContentProvider(item);
+	}
+	
+	public Object[] getChildren(Object parentElement) {
+		TreeItemContentProvider provider = itemContentProvider(parentElement);
+		return (provider == null) ? new Object[0] : provider.getChildren();
+	}
+
+	public Object getParent(Object element) {
+		TreeItemContentProvider provider = itemContentProvider(element);
+		return (provider == null) ? null : provider.getParent();
+	}
+	
+	public boolean hasChildren(Object element) {
+		TreeItemContentProvider provider = itemContentProvider(element);
+		return (provider == null) ? false : provider.hasChildren();
+	}
+}