org.neo4j.bench.chart.ChartData.java Source code

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Here is the source code for org.neo4j.bench.chart.ChartData.java

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/**
 * Copyright (c) 2002-2011 "Neo Technology,"
 * Network Engine for Objects in Lund AB [http://neotechnology.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.bench.chart;

import java.util.HashSet;
import java.util.Set;

import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.SubCategoryAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.renderer.category.GroupedStackedBarRenderer;
import org.jfree.data.KeyToGroupMap;
import org.jfree.data.category.DefaultCategoryDataset;

public class ChartData {
    private final String title;
    private final DefaultCategoryDataset dataset;
    private final SubCategoryAxis domainAxis;
    private final ValueAxis rangeAxis;
    private KeyToGroupMap groupmap;
    private final Set<String> groups = new HashSet<String>();

    public ChartData(String title, String domainAxis, String rangeAxis) {
        this.title = title;
        this.dataset = new DefaultCategoryDataset();
        this.domainAxis = new SubCategoryAxis(domainAxis);
        this.rangeAxis = new NumberAxis(rangeAxis);
    }

    public <T> T render(ChartDestination<T> chart) {
        if (groupmap == null) {
            throw new IllegalStateException("Cannot render a chart without any data.");
        }
        GroupedStackedBarRenderer renderer = new GroupedStackedBarRenderer();
        renderer.setSeriesToGroupMap(groupmap);
        CategoryPlot plot = new CategoryPlot(dataset, domainAxis, rangeAxis, renderer);
        return chart.render(title, plot, renderer);
    }

    public void add(String columnKey, String group, String shard, double value) {
        dataset.addValue(value, domainKey(group, shard), columnKey);
    }

    // Implementation internals

    private DomainKey domainKey(String group, String shard) {
        final DomainKey key = new DomainKey(group, shard);
        if (groups.add(group)) {
            if (groupmap == null) {
                groupmap = new KeyToGroupMap(group);
            }
            domainAxis.addSubCategory(group);
        }
        groupmap.mapKeyToGroup(key, group);
        return key;
    }

    private static class DomainKey implements Comparable<DomainKey> {
        public static final DomainKey NULL = new DomainKey("", "") {
            @Override
            public int compareTo(DomainKey other) {
                if (this.equals(other)) {
                    return 0;
                } else {
                    return -1;
                }
            }
        };
        private final String group;
        private final String shard;
        private final int hash;

        public DomainKey(String group, String shard) {
            this.group = group;
            this.shard = shard;
            this.hash = (group + shard).hashCode();
        }

        public int compareTo(DomainKey other) {
            if (NULL.equals(other)) {
                return -NULL.compareTo(this);
            }
            int cmp = this.group.compareTo(other.group);
            if (cmp == 0) {
                cmp = this.shard.compareTo(other.shard);
            }
            return cmp;
        }

        @Override
        public boolean equals(Object obj) {
            return (obj instanceof DomainKey) && equalTo((DomainKey) obj);
        }

        private boolean equalTo(DomainKey other) {
            return this == other || (this.group.equals(other.group) && this.shard.equals(other.shard));
        }

        @Override
        public String toString() {
            return group + " " + shard;
        }

        @Override
        public int hashCode() {
            return hash;
        }
    }
}