/*
* Java Genetic Algorithm Library (@__identifier__@).
* Copyright (c) @__year__@ Franz Wilhelmstötter
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Author:
* Franz Wilhelmstötter (franz.wilhelmstoetter@gmx.at)
*/
package org.jenetics.tool.trial;
import static java.lang.String.format;
import static java.util.Objects.requireNonNull;
import java.io.IOException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
/**
* Helper class for creating <i>Gnuplot</i> graphs.
*
* @author <a href="mailto:franz.wilhelmstoetter@gmx.at">Franz Wilhelmstötter</a>
* @version 3.4
* @since 3.4
*/
public class Gnuplot {
private static final String DATA_NAME = "data";
private static final String OUTPUT_NAME = "output";
private final Path _template;
private final Map<String, String> _parameters = new HashMap<>();
/**
* Create a new {@code Gnuplot} object with the given <i>template</i> path.
*
* @param template the Gnuplot template path
*/
public Gnuplot(final Path template) {
_template = requireNonNull(template);
}
/**
* Generate the Gnuplot graph.
*
* @param data the input data file
* @param output the output path of the graph
* @throws IOException if the Gnuplot generation fails
*/
public void create(final Path data, final Path output)
throws IOException
{
_parameters.put(DATA_NAME, data.toString());
_parameters.put(OUTPUT_NAME, output.toString());
final Process process = new ProcessBuilder()
.command(command())
.start();
System.out.println(IO.toText(process.getErrorStream()));
try {
process.waitFor();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
private List<String> command() {
final String params = _parameters.entrySet().stream()
.map(Gnuplot::toParamString)
.collect(Collectors.joining("; "));
return Arrays.asList("gnuplot", "-e", params, _template.toString());
}
private static String toParamString(final Map.Entry<String, String> entry) {
return format("%s='%s'", entry.getKey(), entry.getValue());
}
public static void main(final String[] args)
throws IOException, InterruptedException
{
final String base = "/home/fwilhelm/Workspace/Development/Projects/" +
"Jenetics/org.jenetics/src/tool/resources/org/jenetics/trial/";
final Path data = Paths.get(base, "knapsack_execution_time.dat");
final Path output = Paths.get(base, "knapsack_execution_time.svg");
final Gnuplot gnuplot = new Gnuplot(Paths.get(base, "sub_fitness.gp"));
gnuplot.create(data, output);
}
}