Examples with InternalReadAccessor org.drools.core.spi.InternalReadAccessor used on opensource projects

Example 36 with InternalReadAccessor

use of org.drools.core.spi.InternalReadAccessor in project drools by kiegroup.

the class PatternTest method testDeclarationsFactTemplate.

@Test
public void testDeclarationsFactTemplate() throws Exception {
    InternalKnowledgePackage pkg = new KnowledgePackageImpl("org.store");
    final FieldTemplate cheeseName = new FieldTemplateImpl("name", 0, String.class);
    final FieldTemplate cheesePrice = new FieldTemplateImpl("price", 1, Integer.class);
    final FieldTemplate[] fields = new FieldTemplate[] { cheeseName, cheesePrice };
    final FactTemplate cheese = new FactTemplateImpl(pkg, "Cheese", fields);
    final ObjectType type = new FactTemplateObjectType(cheese);
    final Pattern col = new Pattern(0, type, "foo");
    final Declaration dec = col.getDeclaration();
    final InternalReadAccessor ext = dec.getExtractor();
    assertEquals(Fact.class, ext.getExtractToClass());
    final Fact stilton = cheese.createFact(10);
    stilton.setFieldValue("name", "stilton");
    stilton.setFieldValue("price", new Integer(200));
    assertEquals(stilton, dec.getValue(null, stilton));
}

Example 37 with InternalReadAccessor

use of org.drools.core.spi.InternalReadAccessor in project drools by kiegroup.

the class PatternTest method testDeclarationsObjectType.

@Test
public void testDeclarationsObjectType() throws Exception {
    final ObjectType type = new ClassObjectType(Cheese.class);
    final Pattern col = new Pattern(0, type, "foo");
    final Declaration dec = col.getDeclaration();
    final InternalReadAccessor ext = dec.getExtractor();
    assertEquals(Cheese.class, ext.getExtractToClass());
    final Cheese stilton = new Cheese("stilton", 42);
    assertEquals(stilton, dec.getValue(null, stilton));
}

Example 38 with InternalReadAccessor

use of org.drools.core.spi.InternalReadAccessor in project drools by kiegroup.

the class LeftLeftTupleIndexHashTableIteratorTest method getConstraint.

protected BetaNodeFieldConstraint getConstraint(String identifier, Operator operator, String fieldName, Class clazz) {
    ClassFieldAccessorStore store = new ClassFieldAccessorStore();
    store.setClassFieldAccessorCache(new ClassFieldAccessorCache(Thread.currentThread().getContextClassLoader()));
    store.setEagerWire(true);
    InternalReadAccessor extractor = store.getReader(clazz, fieldName);
    Declaration declaration = new Declaration(identifier, extractor, new Pattern(0, new ClassObjectType(clazz)));
    String expression = fieldName + " " + operator.getOperatorString() + " " + declaration.getIdentifier();
    return new MvelConstraintTestUtil(expression, declaration, extractor);
}

Example 39 with InternalReadAccessor

use of org.drools.core.spi.InternalReadAccessor in project drools by kiegroup.

the class JavaAccumulateBuilder method buildExternalFunctionCall.

private Accumulate buildExternalFunctionCall(RuleBuildContext context, AccumulateDescr accumDescr, RuleConditionElement source, Map<String, Declaration> declsInScope, Map<String, Class<?>> declCls, boolean readLocalsFromTuple) {
    // list of functions to build
    final List<AccumulateFunctionCallDescr> funcCalls = accumDescr.getFunctions();
    // list of available source declarations
    final Declaration[] sourceDeclArr = source.getOuterDeclarations().values().toArray(new Declaration[source.getOuterDeclarations().size()]);
    Arrays.sort(sourceDeclArr, RuleTerminalNode.SortDeclarations.instance);
    // set of required previous declarations
    Set<Declaration> requiredDecl = new HashSet<Declaration>();
    Pattern pattern = (Pattern) context.getDeclarationResolver().peekBuildStack();
    if (accumDescr.isMultiFunction()) {
        // the accumulator array
        Accumulator[] accumulators = new Accumulator[funcCalls.size()];
        // creating the custom array reader
        InternalReadAccessor reader = new SelfReferenceClassFieldReader(Object[].class);
        int index = 0;
        for (AccumulateFunctionCallDescr fc : funcCalls) {
            AccumulateFunction function = getAccumulateFunction(context, accumDescr, fc, source, declCls);
            if (function == null) {
                return null;
            }
            bindReaderToDeclaration(context, accumDescr, pattern, fc, new ArrayElementReader(reader, index, function.getResultType()), function.getResultType(), index);
            accumulators[index++] = buildAccumulator(context, accumDescr, declsInScope, declCls, readLocalsFromTuple, sourceDeclArr, requiredDecl, fc, function);
        }
        return new MultiAccumulate(source, requiredDecl.toArray(new Declaration[requiredDecl.size()]), accumulators);
    } else {
        AccumulateFunctionCallDescr fc = accumDescr.getFunctions().get(0);
        AccumulateFunction function = getAccumulateFunction(context, accumDescr, fc, source, declCls);
        if (function == null) {
            return null;
        }
        Class<?> returnType = function.getResultType();
        if (!pattern.isCompatibleWithAccumulateReturnType(returnType)) {
            context.addError(new DescrBuildError(accumDescr, context.getRuleDescr(), null, "Pattern of type: '" + pattern.getObjectType() + "' on rule '" + context.getRuleDescr().getName() + "' is not compatible with type " + returnType.getCanonicalName() + " returned by accumulate function."));
            return null;
        }
        bindReaderToDeclaration(context, accumDescr, pattern, fc, new SelfReferenceClassFieldReader(function.getResultType()), function.getResultType(), -1);
        Accumulator accumulator = buildAccumulator(context, accumDescr, declsInScope, declCls, readLocalsFromTuple, sourceDeclArr, requiredDecl, fc, function);
        return new SingleAccumulate(source, requiredDecl.toArray(new Declaration[requiredDecl.size()]), accumulator);
    }
}

Example 40 with InternalReadAccessor

use of org.drools.core.spi.InternalReadAccessor in project drools by kiegroup.

the class FactTemplateFieldExtractorTest method testDeclaration.

@Test
public void testDeclaration() {
    InternalKnowledgePackage pkg = new KnowledgePackageImpl("org.store");
    final FieldTemplate cheeseName = new FieldTemplateImpl("name", 0, String.class);
    final FieldTemplate cheesePrice = new FieldTemplateImpl("price", 1, Integer.class);
    final FieldTemplate[] fields = new FieldTemplate[] { cheeseName, cheesePrice };
    final FactTemplate cheese = new FactTemplateImpl(pkg, "Cheese", fields);
    final InternalReadAccessor extractName = new FactTemplateFieldExtractor(cheese, 0);
    final Pattern pattern = new Pattern(0, new FactTemplateObjectType(cheese));
    final Declaration declaration = new Declaration("typeOfCheese", extractName, pattern);
    final Fact brie = cheese.createFact(12);
    brie.setFieldValue("name", "brie");
    brie.setFieldValue("price", new Integer(55));
    // Check we can extract Declarations correctly
    assertEquals("brie", declaration.getValue(null, brie));
}