presentations/eclipse-con/2007/plugins/org.eclipse.browser/src/org/eclipse/browser/view/ui/providers/BrowserContentProvider.java

/*******************************************************************************
 * Copyright (c) 2006, 2007 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.browser.view.ui.providers;

import org.eclipse.browser.view.model.LinkModel;
import org.eclipse.browser.view.model.LinkObject;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;

/**
 * BrowserContentProvider
 *
 */
public class BrowserContentProvider implements
		IStructuredContentProvider, ITreeContentProvider {

	/**
	 * 
	 */
	public BrowserContentProvider() {
		// NO-OP
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
	 */
	public Object[] getElements(Object inputElement) {
		if (inputElement instanceof LinkModel) {
			return new Object[]{((LinkModel)inputElement).getRootLinkObject()};
		}
		return new Object[0];
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.IContentProvider#dispose()
	 */
	public void dispose() {
		// NO-OP
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
	 */
	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
		// NO-OP
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
	 */
	public Object[] getChildren(Object parentElement) {
		if (parentElement instanceof LinkObject) {
			return ((LinkObject)parentElement).getFieldChildren().toArray();
		}
		return new Object[0];
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
	 */
	public Object getParent(Object element) {
		if (element instanceof LinkObject) {
			return ((LinkObject)element).getParent();
		}
		return null;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
	 */
	public boolean hasChildren(Object element) {
		if (element instanceof LinkObject) {
			return ((LinkObject)element).hasChildren();
		}		
		return false;
	}

}