/*******************************************************************************
 * 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.layer.cell;

import java.io.Serializable;
import java.util.List;

import org.eclipse.nebula.widgets.nattable.data.IRowDataProvider;
import org.eclipse.nebula.widgets.nattable.data.IRowIdAccessor;
import org.eclipse.nebula.widgets.nattable.layer.LabelStack;

/**
 * @see ColumnOverrideLabelAccumulator
 * @param <T>
 *            type of the bean used as the data source for a row
 */
public class RowOverrideLabelAccumulator<T> extends AbstractOverrider {

    private IRowDataProvider<T> dataProvider;
    private IRowIdAccessor<T> idAccessor;

    public RowOverrideLabelAccumulator(IRowDataProvider<T> dataProvider, IRowIdAccessor<T> idAccessor) {
        this.dataProvider = dataProvider;
        this.idAccessor = idAccessor;
    }

    @Override
    public void accumulateConfigLabels(LabelStack configLabels, int columnPosition, int rowPosition) {
        T rowObject = this.dataProvider.getRowObject(rowPosition);
        Serializable rowId = this.idAccessor.getRowId(rowObject);
        List<String> overrides = getOverrides(rowId);
        if (overrides != null) {
            for (String configLabel : overrides) {
                configLabels.addLabel(configLabel);
            }
        }
    }

    /**
     * Gets the unique id for the row with the given index and registers the
     * labels for that id.
     *
     * @param rowIndex
     *            The index of the row for which element the override should be
     *            registered.
     * @param configLabels
     *            The labels to register.
     */
    public void registerRowOverrides(int rowIndex, String... configLabels) {
        Serializable id = this.idAccessor.getRowId(this.dataProvider.getRowObject(rowIndex));
        registerOverrides(id, configLabels);
    }

}