/*
* Copyright 2011 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.persistence.xstream.impl.domain.solution;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.XStreamException;
import org.optaplanner.core.api.domain.solution.PlanningSolution;
import org.optaplanner.persistence.common.api.domain.solution.SolutionFileIO;
/**
* @param <Solution_> the solution type, the class with the {@link PlanningSolution} annotation
*/
public class XStreamSolutionFileIO<Solution_> implements SolutionFileIO<Solution_> {
public static final String FILE_EXTENSION = "xml";
protected XStream xStream;
public XStreamSolutionFileIO(Class... xStreamAnnotatedClasses) {
xStream = new XStream();
xStream.setMode(XStream.ID_REFERENCES);
xStream.processAnnotations(xStreamAnnotatedClasses);
}
public XStream getXStream() {
return xStream;
}
@Override
public String getInputFileExtension() {
return FILE_EXTENSION;
}
@Override
public String getOutputFileExtension() {
return FILE_EXTENSION;
}
@Override
public Solution_ read(File inputSolutionFile) {
// xStream.fromXml(InputStream) does not use UTF-8
try (Reader reader = new InputStreamReader(new FileInputStream(inputSolutionFile), "UTF-8")) {
return (Solution_) xStream.fromXML(reader);
} catch (XStreamException | IOException e) {
throw new IllegalArgumentException("Failed reading inputSolutionFile (" + inputSolutionFile + ").", e);
}
}
@Override
public void write(Solution_ solution, File outputSolutionFile) {
try (Writer writer = new OutputStreamWriter(new FileOutputStream(outputSolutionFile), "UTF-8")) {
xStream.toXML(solution, writer);
} catch (IOException e) {
throw new IllegalArgumentException("Failed writing outputSolutionFile (" + outputSolutionFile + ").", e);
}
}
}