Examples with DrlParser org.drools.compiler.compiler.DrlParser used on opensource projects

Example 26 with DrlParser

use of org.drools.compiler.compiler.DrlParser in project drools by kiegroup.

the class KnowledgeBuilderImpl method generatedDrlToPackageDescr.

private PackageDescr generatedDrlToPackageDescr(Resource resource, String generatedDrl) throws DroolsParserException {
    // dump the generated DRL if the dump dir was configured
    if (this.configuration.getDumpDir() != null) {
        dumpDrlGeneratedFromDTable(this.configuration.getDumpDir(), generatedDrl, resource.getSourcePath());
    }
    DrlParser parser = new DrlParser(configuration.getLanguageLevel());
    PackageDescr pkg = parser.parse(resource, new StringReader(generatedDrl));
    this.results.addAll(parser.getErrors());
    if (pkg == null) {
        addBuilderResult(new ParserError(resource, "Parser returned a null Package", 0, 0));
    } else {
        pkg.setResource(resource);
    }
    return parser.hasErrors() ? null : pkg;
}

Example 27 with DrlParser

use of org.drools.compiler.compiler.DrlParser in project drools by kiegroup.

the class KnowledgeBuilderImpl method addPackageFromDrl.

/**
 * Load a rule package from DRL source and associate all loaded artifacts
 * with the given resource.
 *
 * @param reader
 * @param sourceResource the source resource for the read artifacts
 * @throws DroolsParserException
 * @throws IOException
 */
public void addPackageFromDrl(final Reader reader, final Resource sourceResource) throws DroolsParserException, IOException {
    this.resource = sourceResource;
    final DrlParser parser = new DrlParser(configuration.getLanguageLevel());
    final PackageDescr pkg = parser.parse(sourceResource, reader);
    this.results.addAll(parser.getErrors());
    if (pkg == null) {
        addBuilderResult(new ParserError(sourceResource, "Parser returned a null Package", 0, 0));
    }
    if (!parser.hasErrors()) {
        addPackage(pkg);
    }
    this.resource = null;
}

Example 28 with DrlParser

use of org.drools.compiler.compiler.DrlParser in project drools by kiegroup.

the class ParserTest method testErrorsParser.

@Test
public void testErrorsParser() throws Exception {
    final DrlParser parser = new DrlParser(LanguageLevelOption.DRL5);
    assertEquals(0, parser.getErrors().size());
    parser.parse(new InputStreamReader(getClass().getResourceAsStream("errors_parser_multiple.drl")));
    assertTrue(parser.hasErrors());
    assertTrue(parser.getErrors().size() > 0);
    assertTrue(parser.getErrors().get(0) instanceof ParserError);
    final ParserError first = ((ParserError) parser.getErrors().get(0));
    assertTrue(first.getMessage() != null);
    assertFalse(first.getMessage().equals(""));
}

Example 29 with DrlParser

use of org.drools.compiler.compiler.DrlParser in project drools by kiegroup.

the class DRLDumperTest method testDumpers.

@Test
public void testDumpers() throws Exception {
    final DrlParser parser = new DrlParser(LanguageLevelOption.DRL5);
    final Resource resource = new InputStreamResource(getClass().getResourceAsStream("test_Dumpers.drl"));
    final PackageDescr pkg = parser.parse(resource);
    if (parser.hasErrors()) {
        for (final DroolsError error : parser.getErrors()) {
            logger.warn(error.toString());
        }
        fail(parser.getErrors().toString());
    }
    KieBase kbase = SerializationHelper.serializeObject(loadKnowledgeBase(pkg));
    KieSession ksession = kbase.newKieSession();
    List list = new ArrayList();
    ksession.setGlobal("list", list);
    final Cheese brie = new Cheese("brie", 12);
    ksession.insert(brie);
    ksession.fireAllRules();
    assertEquals(3, list.size());
    assertEquals("3 1", list.get(0));
    assertEquals("MAIN", list.get(1));
    assertEquals("1 1", list.get(2));
    final DrlDumper drlDumper = new DrlDumper();
    final String drlResult = drlDumper.dump(pkg);
    System.out.println(drlResult);
    kbase = SerializationHelper.serializeObject(loadKnowledgeBaseFromString(drlResult));
    ksession = kbase.newKieSession();
    list = new ArrayList();
    ksession.setGlobal("list", list);
    ksession.insert(brie);
    ksession.fireAllRules();
    assertEquals(3, list.size());
    assertEquals("3 1", list.get(0));
    assertEquals("MAIN", list.get(1));
    assertEquals("1 1", list.get(2));
}

Example 30 with DrlParser

use of org.drools.compiler.compiler.DrlParser in project drools by kiegroup.

the class ChangeSetBuilder method diffResource.

private static ResourceChangeSet diffResource(String file, byte[] ob, byte[] cb) {
    ResourceChangeSet pkgcs = new ResourceChangeSet(file, ChangeType.UPDATED);
    ResourceType type = ResourceType.determineResourceType(file);
    if (ResourceType.DRL.equals(type) || ResourceType.GDRL.equals(type) || ResourceType.RDRL.equals(type) || ResourceType.TDRL.equals(type)) {
        try {
            PackageDescr opkg = new DrlParser().parse(new ByteArrayResource(ob));
            PackageDescr cpkg = new DrlParser().parse(new ByteArrayResource(cb));
            String pkgName = isEmpty(cpkg.getName()) ? getDefaultPackageName() : cpkg.getName();
            String oldPkgName = isEmpty(opkg.getName()) ? getDefaultPackageName() : opkg.getName();
            if (!oldPkgName.equals(pkgName)) {
                // so it is useless to further investigate other changes
                return pkgcs;
            }
            for (RuleDescr crd : cpkg.getRules()) {
                pkgcs.getLoadOrder().add(new ResourceChangeSet.RuleLoadOrder(pkgName, crd.getName(), crd.getLoadOrder()));
            }
            // needs to be cloned
            List<RuleDescr> orules = new ArrayList<>(opkg.getRules());
            diffDescrs(ob, cb, pkgcs, orules, cpkg.getRules(), ResourceChange.Type.RULE, RULE_CONVERTER);
            // needs to be cloned
            List<FunctionDescr> ofuncs = new ArrayList<>(opkg.getFunctions());
            diffDescrs(ob, cb, pkgcs, ofuncs, cpkg.getFunctions(), ResourceChange.Type.FUNCTION, FUNC_CONVERTER);
            // needs to be cloned
            List<GlobalDescr> oglobals = new ArrayList<>(opkg.getGlobals());
            diffDescrs(ob, cb, pkgcs, oglobals, cpkg.getGlobals(), ResourceChange.Type.GLOBAL, GLOBAL_CONVERTER);
        } catch (Exception e) {
            logger.error("Error analyzing the contents of " + file + ". Skipping.", e);
        }
    }
    pkgcs.getChanges().sort(Comparator.comparingInt(r -> r.getChangeType().ordinal()));
    return pkgcs;
}