org.eclipse.nebula.widgets.nattable.test.performance/src/org/eclipse/nebula/widgets/nattable/test/performance/ListDataProviderPerformanceTest.java

/*******************************************************************************
 * Copyright (c) 2012, 2020 Original authors and others.
 *
 * This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 2.0
 * which is available at https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     Original authors and others - initial API and implementation
 ******************************************************************************/
package org.eclipse.nebula.widgets.nattable.test.performance;

import java.util.List;
import java.util.Map;

import org.eclipse.nebula.widgets.nattable.data.IDataProvider;
import org.eclipse.nebula.widgets.nattable.data.ReflectiveColumnPropertyAccessor;
import org.eclipse.nebula.widgets.nattable.dataset.fixture.data.RowDataFixture;
import org.eclipse.nebula.widgets.nattable.dataset.fixture.data.RowDataListFixture;
import org.eclipse.nebula.widgets.nattable.extension.glazedlists.GlazedListsDataProvider;
import org.eclipse.nebula.widgets.nattable.grid.data.DefaultColumnHeaderDataProvider;
import org.eclipse.nebula.widgets.nattable.grid.layer.DefaultGridLayer;
import org.junit.Assert;
import org.junit.Test;

import ca.odell.glazedlists.GlazedLists;

@SuppressWarnings("deprecation")
public class ListDataProviderPerformanceTest extends
        AbstractLayerPerformanceTest {

    // Bench marked ~ 65 milliseconds. Intel 2GHZ, 2GB Ram
    @Test
    public void performanceOfListDataProvider() throws Exception {
        List<RowDataFixture> largeList = RowDataListFixture.getList(26000);
        Assert.assertTrue(largeList.size() > 25000);

        this.layer = new DefaultGridLayer(largeList,
                RowDataListFixture.getPropertyNames(),
                RowDataListFixture.getPropertyToLabelMap());
    }

    // Bench marked ~ 45 milliseconds. Intel 2GHZ, 2GB Ram
    @Test
    public void performanceOfGlazedListDataProvider() throws Exception {
        String[] propertyNames = RowDataListFixture.getPropertyNames();
        Map<String, String> propertyToLabelMap = RowDataListFixture
                .getPropertyToLabelMap();
        List<RowDataFixture> largeList = RowDataListFixture.getList(26000);

        Assert.assertTrue(largeList.size() > 25000);

        IDataProvider glazedListsDataProvider = new GlazedListsDataProvider<RowDataFixture>(
                GlazedLists.eventList(largeList),
                new ReflectiveColumnPropertyAccessor<RowDataFixture>(
                        propertyNames));

        IDataProvider columnHeaderDataProvider = new DefaultColumnHeaderDataProvider(
                propertyNames, propertyToLabelMap);

        this.layer = new DefaultGridLayer(glazedListsDataProvider,
                columnHeaderDataProvider);
    }
}