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OptaPlanner solves planning problems.
This lightweight, embeddable planning engine implements powerful and scalable algorithms
to optimize business resource scheduling and planning.
This module contains the examples which demonstrate how to use it in a normal Java application.
/*
* Copyright 2010 Red Hat, Inc. and/or its affiliates.
*
* 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.
*/
package org.optaplanner.examples.common.persistence;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import org.optaplanner.core.api.domain.solution.PlanningSolution;
/**
* @param the solution type, the class with the {@link PlanningSolution} annotation
*/
public abstract class AbstractTxtSolutionExporter extends AbstractSolutionExporter {
protected static final String DEFAULT_OUTPUT_FILE_SUFFIX = "txt";
@Override
public String getOutputFileSuffix() {
return DEFAULT_OUTPUT_FILE_SUFFIX;
}
public abstract TxtOutputBuilder createTxtOutputBuilder();
@Override
public void writeSolution(Solution_ solution, File outputFile) {
try (BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(outputFile), "UTF-8"))) {
TxtOutputBuilder txtOutputBuilder = createTxtOutputBuilder();
txtOutputBuilder.setBufferedWriter(writer);
txtOutputBuilder.setSolution(solution);
txtOutputBuilder.writeSolution();
logger.info("Exported: {}", outputFile);
} catch (IOException e) {
throw new IllegalArgumentException("Could not write the file (" + outputFile.getName() + ").", e);
}
}
public static abstract class TxtOutputBuilder extends OutputBuilder {
protected BufferedWriter bufferedWriter;
protected Solution_ solution;
public void setBufferedWriter(BufferedWriter bufferedWriter) {
this.bufferedWriter = bufferedWriter;
}
public void setSolution(Solution_ solution) {
this.solution = solution;
}
public abstract void writeSolution() throws IOException;
// ************************************************************************
// Helper methods
// ************************************************************************
}
}