/*--------------------------------------------------------------*
  Copyright (C) 2006-2015 OpenSim Ltd.

  This file is distributed WITHOUT ANY WARRANTY. See the file
  'License' for details on this and other legal matters.
*--------------------------------------------------------------*/

package org.omnetpp.common.ui;

import java.util.Collection;

import org.apache.commons.lang3.ArrayUtils;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;

/**
 * Content provider for showing a list or array of objects in a Table/Tree viewer.
 *
 * @author tomi
 */
public class ListContentProvider implements ITreeContentProvider {

    @SuppressWarnings("unchecked")
    public Object[] getElements(Object inputElement) {
        if (inputElement.getClass().isArray())
            return (Object[])inputElement;
        else if (inputElement instanceof Collection) {
            Collection<? extends Object> input = (Collection<? extends Object>)inputElement;
            return input.toArray(new Object[input.size()]);
        }
        else
            return ArrayUtils.EMPTY_OBJECT_ARRAY;
    }

    public Object getParent(Object element) {
        return null;
    }

    public boolean hasChildren(Object element) {
        return false;
    }

    public Object[] getChildren(Object parentElement) {
        return ArrayUtils.EMPTY_OBJECT_ARRAY;
    }

    public void dispose() {
    }

    public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
    }
}
