/*******************************************************************************
 * Copyright (c) 2012 Original authors 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:
 *     Original authors and others - initial API and implementation
 ******************************************************************************/
package org.eclipse.nebula.widgets.nattable.columnCategories.gui;

import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.nebula.widgets.nattable.Messages;
import org.eclipse.nebula.widgets.nattable.columnCategories.Node;
import org.eclipse.nebula.widgets.nattable.columnChooser.ColumnChooserUtils;
import org.eclipse.nebula.widgets.nattable.columnChooser.ColumnEntry;
import org.eclipse.nebula.widgets.nattable.util.ObjectUtils;

public class ColumnCategoriesLabelProvider extends LabelProvider {

    private static final Log log = LogFactory.getLog(ColumnCategoriesLabelProvider.class);

    List<ColumnEntry> hiddenEntries;

    public ColumnCategoriesLabelProvider(List<ColumnEntry> hiddenEntries) {
        this.hiddenEntries = hiddenEntries;
    }

    @Override
    public String getText(Object element) {
        Node node = (Node) element;
        switch (node.getType()) {
            case CATEGORY:
                return node.getData();
            case COLUMN:
                int index = Integer.parseInt(node.getData());
                ColumnEntry columnEntry = ColumnChooserUtils.find(this.hiddenEntries, index);
                if (ObjectUtils.isNull(columnEntry)) {
                    log.error("Column index " + index + " is present " + //$NON-NLS-1$ //$NON-NLS-2$
                            "in the Column Categories model, " + //$NON-NLS-1$
                            "but not in the underlying data"); //$NON-NLS-1$
                    return String.valueOf(index);
                }
                return columnEntry.getLabel();
            default:
                return Messages.getString("Unknown"); //$NON-NLS-1$
        }
    }
}