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/*-
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2018-2019 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.drools.util;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
import lombok.NonNull;
import org.drools.compiler.kie.builder.impl.InternalKieModule;
import org.drools.compiler.kproject.models.KieModuleModelImpl;
import org.kie.api.KieServices;
import org.kie.api.builder.KieBuilder;
import org.kie.api.builder.KieFileSystem;
import org.kie.api.builder.Message;
import org.kie.api.builder.ReleaseId;
import org.kie.api.builder.model.KieModuleModel;
import org.kie.api.definition.KiePackage;
import org.kie.api.definition.rule.Rule;
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.KieSession;
import org.kie.scanner.KieMavenRepository;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Kie related utilities.
*/
public class KieUtils {
private static final Logger logger = LoggerFactory.getLogger(KieUtils.class);
private KieUtils() {
// Utility class
}
/**
* Installs a rules artifact in the local maven repository.
*/
public static ReleaseId installArtifact(File kmodule, File pom, String drlKJarPath, @NonNull List<File> drls)
throws IOException {
KieModuleModel kieModule = KieModuleModelImpl.fromXML(kmodule);
final KieFileSystem kieFileSystem = KieServices.Factory.get().newKieFileSystem();
kieFileSystem.writeKModuleXML(kieModule.toXML());
kieFileSystem.writePomXML(new String(Files.readAllBytes(pom.toPath())));
for (File drl : drls) {
kieFileSystem.write(drlKJarPath + drl.getName(), new String(Files.readAllBytes(drl.toPath())));
}
KieBuilder kieBuilder = build(kieFileSystem);
return getReleaseId(kieBuilder, pom);
}
/**
* Installs a rules artifact in the local maven repository.
*/
public static ReleaseId installArtifact(File kmodule, File pom, String drlKJarPath, File drl)
throws IOException {
return installArtifact(kmodule, pom, drlKJarPath, Collections.singletonList(drl));
}
private static ReleaseId getReleaseId(KieBuilder kieBuilder, File pomFile) {
ReleaseId releaseId = kieBuilder.getKieModule().getReleaseId();
KieMavenRepository
.getKieMavenRepository()
.installArtifact(releaseId,
(InternalKieModule) kieBuilder.getKieModule(),
pomFile);
return releaseId;
}
/**
* Get Knowledge Bases.
*/
public static List<String> getBases(KieContainer container) {
return new ArrayList<>(container.getKieBaseNames());
}
/**
* Get Packages.
*/
public static List<KiePackage> getPackages(KieContainer container) {
return getBases(container).stream()
.flatMap(base -> container.getKieBase(base).getKiePackages().stream())
.collect(Collectors.toList());
}
/**
* Get Package Names.
*/
public static List<String> getPackageNames(KieContainer container) {
return getPackages(container).stream()
.map(KiePackage::getName)
.collect(Collectors.toList());
}
/**
* Get Rules.
*/
public static List<Rule> getRules(KieContainer container) {
return getPackages(container).stream()
.flatMap(kiePackage -> kiePackage.getRules().stream())
.collect(Collectors.toList());
}
/**
* Get Rule Names.
*/
public static List<String> getRuleNames(KieContainer container) {
return getRules(container).stream()
.map(Rule::getName)
.collect(Collectors.toList());
}
/**
* Get Facts.
*/
public static List<Object> getFacts(KieSession session) {
return session.getFactHandles().stream()
.map(session::getObject)
.collect(Collectors.toList());
}
/**
* Create Container.
*/
public static KieContainer createContainer(ReleaseId releaseId) {
return KieServices.Factory.get().newKieContainer(releaseId);
}
private static KieBuilder build(KieFileSystem kieFileSystem) {
KieBuilder kieBuilder = KieServices.Factory.get().newKieBuilder(kieFileSystem);
List<Message> messages = kieBuilder.buildAll().getResults().getMessages();
if (messages != null && !messages.isEmpty()) {
throw new IllegalArgumentException(messages.toString());
}
return kieBuilder;
}
}
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