1 files changed, 83 insertions, 41 deletions

diff --git a/policy-core/src/main/java/org/onap/policy/drools/util/KieUtils.java b/policy-core/src/main/java/org/onap/policy/drools/util/KieUtils.java
index 5500d110..babc0413 100644
--- a/policy-core/src/main/java/org/onap/policy/drools/util/KieUtils.java
+++ b/policy-core/src/main/java/org/onap/policy/drools/util/KieUtils.java
@@ -22,10 +22,13 @@ package org.onap.policy.drools.util;
 
 import java.io.File;
 import java.io.IOException;
-import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
-import java.nio.file.Path;
+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;
@@ -34,44 +37,52 @@ 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.
-     *
-     * @param kmodule kmodule specification
-     * @param pom pom
-     * @param drlKJarPath path used in kjar drl to the actual drl
-     * @param drl rules in drl language
-     *
-     * @return releaseId result o a sucessful installation
-     * @throws IOException error accessing necessary resources
      */
-    public static ReleaseId installArtifact(String kmodule, String pom, String drlKJarPath, 
-            String drl) throws IOException {
+    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(pom);
-        kieFileSystem.write(drlKJarPath, drl);
+        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 = kieBuild(kieFileSystem);
+        KieBuilder kieBuilder = build(kieFileSystem);
+        return getReleaseId(kieBuilder, pom);
+    }
 
-        Path pomPath = Files.createTempFile("policy-core-", ".pom");
-        Files.write(pomPath, pom.getBytes(StandardCharsets.UTF_8));
-        File pomFile = pomPath.toFile();
-        pomFile.deleteOnExit();
+    /**
+     * 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()
@@ -82,34 +93,65 @@ public class KieUtils {
     }
 
     /**
-     * Installs a rules artifact in the local maven repository.
-     *
-     * @param kmodule kmodule specification
-     * @param pom pom
-     * @param drlKJarPath path used in kjar drl to the actual drl
-     * @param drl rules in drl language
-     *
-     * @return releaseId result o a sucessful installation
-     * @throws IOException error accessing necessary resources
+     * Get Knowledge Bases.
      */
-    public static ReleaseId installArtifact(File kmodule, File pom, String drlKJarPath, File drl) throws IOException {
-        KieModuleModel kieModule = KieModuleModelImpl.fromXML(kmodule);
+    public static List<String> getBases(KieContainer container) {
+        return new ArrayList<>(container.getKieBaseNames());
+    }
 
-        final KieFileSystem kieFileSystem = KieServices.Factory.get().newKieFileSystem();
-        kieFileSystem.writeKModuleXML(kieModule.toXML());
-        kieFileSystem.writePomXML(new String(Files.readAllBytes(pom.toPath())));
-        kieFileSystem.write(drlKJarPath, new String(Files.readAllBytes(drl.toPath())));
+    /**
+     * 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());
+    }
 
-        KieBuilder kieBuilder = kieBuild(kieFileSystem);
+    /**
+     * Get Rules.
+     */
+    public static List<Rule> getRules(KieContainer container) {
+        return getPackages(container).stream()
+            .flatMap(kiePackage -> kiePackage.getRules().stream())
+            .collect(Collectors.toList());
+    }
 
-        ReleaseId releaseId = kieBuilder.getKieModule().getReleaseId();
-        KieMavenRepository
-            .getKieMavenRepository()
-            .installArtifact(releaseId, (InternalKieModule) kieBuilder.getKieModule(), pom);
-        return releaseId;
+    /**
+     * 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 kieBuild(KieFileSystem kieFileSystem) {
+    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()) {