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Drools Planner optimizes automated planning by combining metaheuristic search algorithms with rule
engine powered score calculation. This is the drools-planner-examples module which contains examples on how to use
Drools Planner.
/*
* Copyright 2010 JBoss Inc
*
* 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.drools.planner.examples.common.persistence;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.io.IOUtils;
import org.drools.planner.core.solution.Solution;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
public abstract class AbstractXmlSolutionImporter extends AbstractSolutionImporter {
private static final String DEFAULT_INPUT_FILE_SUFFIX = ".xml";
protected AbstractXmlSolutionImporter(SolutionDao solutionDao) {
super(solutionDao);
}
protected String getInputFileSuffix() {
return DEFAULT_INPUT_FILE_SUFFIX;
}
public abstract XmlInputBuilder createXmlInputBuilder();
public Solution readSolution(File inputFile) {
InputStream in = null;
try {
in = new FileInputStream(inputFile);
SAXBuilder builder = new SAXBuilder(false);
Document document = builder.build(in);
XmlInputBuilder txtInputBuilder = createXmlInputBuilder();
txtInputBuilder.setDocument(document);
try {
return txtInputBuilder.readSolution();
} catch (IllegalArgumentException e) {
throw new IllegalArgumentException("Exception in inputFile (" + inputFile + ")", e);
} catch (IllegalStateException e) {
throw new IllegalStateException("Exception in inputFile (" + inputFile + ")", e);
}
} catch (IOException e) {
throw new IllegalArgumentException("Could not read the file (" + inputFile.getName() + ").", e);
} catch (JDOMException e) {
throw new IllegalArgumentException("Could not parse the XML file (" + inputFile.getName() + ").", e);
} finally {
IOUtils.closeQuietly(in);
}
}
public abstract class XmlInputBuilder {
protected Document document;
public void setDocument(Document document) {
this.document = document;
}
public abstract Solution readSolution() throws IOException, JDOMException;
// ************************************************************************
// Helper methods
// ************************************************************************
protected void assertElementName(Element element, String name) {
if (!element.getName().equals(name)) {
throw new IllegalStateException("Element name (" + element.getName()
+ ") should be " + name + ".");
}
}
}
}