Examples with Pattern org.drools.core.rule.Pattern used on opensource projects

Example 21 with Pattern

use of org.drools.core.rule.Pattern in project drools by kiegroup.

the class KnowledgeBuilderTest method testAnd.

@Test
public void testAnd() throws Exception {
    final KnowledgeBuilderImpl builder = new KnowledgeBuilderImpl();
    final RuleImpl rule = createRule(new AndDescr(), builder, "update(stilton);");
    assertLength(0, builder.getErrors().getErrors());
    final GroupElement lhs = rule.getLhs();
    assertLength(1, lhs.getChildren());
    final GroupElement and = (GroupElement) lhs.getChildren().get(0);
    assertLength(1, and.getChildren());
    final Pattern pattern = (Pattern) and.getChildren().get(0);
}

Example 22 with Pattern

use of org.drools.core.rule.Pattern in project drools by kiegroup.

the class KnowledgeBuilderTest method testNot.

@Test
public void testNot() throws Exception {
    KnowledgeBuilderImpl builder = new KnowledgeBuilderImpl();
    // Make sure we can't accessa  variable bound inside the not node
    RuleImpl rule = createRule(new NotDescr(), builder, "update(stilton);");
    assertTrue(builder.hasErrors());
    builder = new KnowledgeBuilderImpl();
    rule = createRule(new NotDescr(), builder, "");
    assertEquals(0, builder.getErrors().getErrors().length);
    final GroupElement lhs = rule.getLhs();
    assertLength(1, lhs.getChildren());
    final GroupElement not = (GroupElement) lhs.getChildren().get(0);
    assertLength(1, not.getChildren());
    final Pattern pattern = (Pattern) not.getChildren().get(0);
}

Example 23 with Pattern

use of org.drools.core.rule.Pattern in project drools by kiegroup.

the class QueryBuilder method build.

public Pattern build(final RuleBuildContext context, final QueryDescr queryDescr) {
    ObjectType queryObjectType = ClassObjectType.DroolsQuery_ObjectType;
    final Pattern pattern = new Pattern(context.getNextPatternId(), // offset is 0 by default
    0, queryObjectType, null);
    final InternalReadAccessor extractor = PatternBuilder.getFieldReadAccessor(context, queryDescr, pattern, "name", null, true);
    final QueryNameConstraint constraint = new QueryNameConstraint(extractor, queryDescr.getName());
    PatternBuilder.registerReadAccessor(context, queryObjectType, "name", constraint);
    // adds appropriate constraint to the pattern
    pattern.addConstraint(constraint);
    ObjectType argsObjectType = ClassObjectType.DroolsQuery_ObjectType;
    InternalReadAccessor arrayExtractor = PatternBuilder.getFieldReadAccessor(context, queryDescr, null, argsObjectType, "elements", null, true);
    QueryImpl query = ((QueryImpl) context.getRule());
    String[] params;
    String[] types;
    int numParams = queryDescr.getParameters().length;
    if (query.isAbductive()) {
        params = Arrays.copyOf(queryDescr.getParameters(), queryDescr.getParameters().length + 1);
        types = Arrays.copyOf(queryDescr.getParameterTypes(), queryDescr.getParameterTypes().length + 1);
    } else {
        params = queryDescr.getParameters();
        types = queryDescr.getParameterTypes();
    }
    Declaration[] declarations = new Declaration[params.length];
    Class<?> abductionReturnKlass = null;
    if (query.isAbductive()) {
        Abductive abductive = queryDescr.getTypedAnnotation(Abductive.class);
        abductionReturnKlass = abductive.target();
        params[numParams] = "";
        types[numParams] = abductionReturnKlass.getName();
    }
    int i = 0;
    try {
        for (i = 0; i < params.length; i++) {
            Declaration declr = pattern.addDeclaration(params[i]);
            // this bit is different, notice its the ArrayElementReader that we wire up to, not the declaration.
            ArrayElementReader reader = new ArrayElementReader(arrayExtractor, i, context.getDialect().getTypeResolver().resolveType(types[i]));
            PatternBuilder.registerReadAccessor(context, argsObjectType, "elements", reader);
            declr.setReadAccessor(reader);
            declarations[i] = declr;
        }
        query.setParameters(declarations);
    } catch (ClassNotFoundException e) {
        context.addError(new DescrBuildError(context.getParentDescr(), queryDescr, e, "Unable to resolve type '" + types[i] + " for parameter" + params[i]));
    }
    context.setPrefixPattern(pattern);
    if (query.isAbductive()) {
        String returnName = "";
        try {
            AnnotationDescr ann = queryDescr.getAnnotation(Abductive.class);
            Object[] argsVal = ((Object[]) ann.getValue("args"));
            String[] args = argsVal != null ? Arrays.copyOf(argsVal, argsVal.length, String[].class) : null;
            returnName = types[numParams];
            ObjectType objectType = new ClassObjectType(abductionReturnKlass, false);
            objectType = context.getPkg().getClassFieldAccessorStore().wireObjectType(objectType, (AbductiveQuery) query);
            ((AbductiveQuery) query).setReturnType(objectType, params, args, declarations);
        } catch (NoSuchMethodException e) {
            context.addError(new DescrBuildError(context.getParentDescr(), queryDescr, e, "Unable to resolve abducible constructor for type : " + returnName + " with types " + Arrays.toString(types)));
        } catch (IllegalArgumentException e) {
            context.addError(new DescrBuildError(context.getParentDescr(), queryDescr, e, e.getMessage()));
        }
    }
    return pattern;
}

Example 24 with Pattern

use of org.drools.core.rule.Pattern in project drools by kiegroup.

the class AnnotationsTest method testCollectAnnotationsParsingAndBuilding.

@Test
public void testCollectAnnotationsParsingAndBuilding() throws Exception {
    final DrlParser parser = new DrlParser(LanguageLevelOption.DRL6);
    final KnowledgeBuilderImpl kBuilder = new KnowledgeBuilderImpl();
    kBuilder.addPackage(new PackageDescr("org.drools"));
    String ruleDrl = "package org.drools.compiler; " + " " + "dialect 'mvel' " + " " + "import java.util.Collection; " + "import " + Annot.class.getCanonicalName() + "; " + " " + "rule \"test collect with annotation\" " + "    when " + "        Collection() from collect ( " + "            String() @Annot " + "        ) " + "    then " + "end " + "";
    final PackageDescr pkgDescr = parser.parse(new StringReader(ruleDrl));
    // just checking there is no parsing errors
    assertFalse(parser.getErrors().toString(), parser.hasErrors());
    kBuilder.addPackage(pkgDescr);
    assertTrue(kBuilder.getErrors().toString(), kBuilder.getErrors().isEmpty());
    final RuleImpl rule = kBuilder.getPackage(pkgDescr.getName()).getRule("test collect with annotation");
    List<? extends RuleConditionElement> nested = ((Pattern) rule.getLhs().getChildren().get(0)).getSource().getNestedElements();
    assertEquals(1, nested.size());
    Map<String, AnnotationDefinition> annotations = ((Pattern) nested.get(0)).getAnnotations();
    assertEquals(1, annotations.size());
    assertNotNull(annotations.keySet().iterator().next());
}

Example 25 with Pattern

use of org.drools.core.rule.Pattern in project drools by kiegroup.

the class AnnotationsTest method testTypedSimpleArrays.

@Test
public void testTypedSimpleArrays() {
    String drl = "package org.drools.test; " + "import " + Simple.class.getName().replace("$", ".") + "; " + "rule Foo " + "when " + "  String() @Simple( numbers = { 1, 2, 3 } ) " + "then " + "end ";
    KieHelper helper = new KieHelper();
    helper.addContent(drl, ResourceType.DRL);
    Pattern p = ((Pattern) ((RuleImpl) helper.build().getRule("org.drools.test", "Foo")).getLhs().getChildren().get(0));
    Map<String, AnnotationDefinition> defs = p.getAnnotations();
    assertEquals(1, defs.size());
    AnnotationDefinition simple = defs.get(Simple.class.getName().replace("$", "."));
    assertNotNull(simple);
    Object val = simple.getPropertyValue("numbers");
    assertTrue(val instanceof int[]);
}