// ============================================================================
//
// Copyright (C) 2006-2016 Talend Inc. - www.talend.com
//
// This source code is available under agreement available at
// %InstallDIR%\features\org.talend.rcp.branding.%PRODUCTNAME%\%PRODUCTNAME%license.txt
//
// You should have received a copy of the agreement
// along with this program; if not, write to Talend SA
// 9 rue Pages 92150 Suresnes, France
//
// ============================================================================
package org.talend.dataprofiler.core.ui.utils;

import java.util.Arrays;

import org.eclipse.core.resources.IFolder;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;

/**
 * 
 * @author zshen
 * 
 */
class UdiJarContentProvider implements ITreeContentProvider {

    /*
     * (non-Jsdoc)
     * 
     * @see org.eclipse.jface.viewers.IContentProvider#dispose()
     */
    public void dispose() {
        // nothing need to do
    }

    /*
     * (non-Jsdoc)
     * 
     * @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) {
        // nothing need to do
    }

    /*
     * (non-Jsdoc)
     * 
     * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
     */
    public Object[] getElements(Object inputElement) {

        return getChildren(inputElement);
    }

    /*
     * (non-Jsdoc)
     * 
     * @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
     */
    public Object[] getChildren(Object parentElement) {
        if (parentElement instanceof IFolder) {
            return Arrays.asList(((IFolder) parentElement).getLocation().toFile().listFiles()).toArray();
        }
        return null;
    }

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

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

}