org.eclipse.jface.viewers.TreeNodeContentProvider.java Source code

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Here is the source code for org.eclipse.jface.viewers.TreeNodeContentProvider.java

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/*******************************************************************************
 * Copyright (c) 2005, 2015 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.jface.viewers;

/**
 * <p>
 * A content provider that expects every element to be a <code>TreeNode</code>.
 * Most methods delegate to <code>TreeNode</code>. <code>dispose()</code>
 * and <code>inputChanged(Viewer, Object, Object)</code> do nothing by
 * default.
 * </p>
 * <p>
 * This class and all of its methods may be overridden or extended.
 * </p>
 *
 * @since 3.2
 * @see org.eclipse.jface.viewers.TreeNode
 */
public class TreeNodeContentProvider implements ITreeContentProvider {

    @Override
    public void dispose() {
        // Do nothing
    }

    @Override
    public Object[] getChildren(final Object parentElement) {
        final TreeNode node = (TreeNode) parentElement;
        return node.getChildren();
    }

    @Override
    public Object[] getElements(final Object inputElement) {
        if (inputElement instanceof TreeNode[]) {
            return (TreeNode[]) inputElement;
        }
        return new Object[0];
    }

    @Override
    public Object getParent(final Object element) {
        final TreeNode node = (TreeNode) element;
        return node.getParent();
    }

    @Override
    public boolean hasChildren(final Object element) {
        final TreeNode node = (TreeNode) element;
        return node.hasChildren();
    }

    @Override
    public void inputChanged(final Viewer viewer, final Object oldInput, final Object newInput) {
        // Do nothing
    }
}