/*
* Copyright 2011 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.examples.sudoku.rules;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseConfiguration;
import org.drools.KnowledgeBaseFactory;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderError;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.io.ResourceFactory;
public class DroolsUtil {
public static KnowledgeBase readKnowledgeBase(String... drlFileNames) {
KnowledgeBuilder kBuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
// This parses and compiles a DRL file.
for (String drlFileName: drlFileNames) {
kBuilder.add(ResourceFactory.newClassPathResource(drlFileName, org.drools.examples.sudoku.SudokuExample.class ),
ResourceType.DRL);
if (kBuilder.hasErrors()){
for (KnowledgeBuilderError err: kBuilder.getErrors()) {
System.out.println(err.toString());
}
throw new IllegalStateException("DRL errors");
}
}
// Add the package to a knowledge base (deploy the rule package).
KnowledgeBaseConfiguration kBaseConfig = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
KnowledgeBase kBase = KnowledgeBaseFactory.newKnowledgeBase(kBaseConfig);
kBase.addKnowledgePackages(kBuilder.getKnowledgePackages());
return kBase;
}
}