Examples with AccumulateDescr org.drools.drl.ast.descr.AccumulateDescr used on opensource projects

Example 16 with AccumulateDescr

use of org.drools.drl.ast.descr.AccumulateDescr in project drools by kiegroup.

the class MVELAccumulateBuilder method build.

@SuppressWarnings("unchecked")
public RuleConditionElement build(final RuleBuildContext context, final BaseDescr descr, final Pattern prefixPattern) {
    boolean typesafe = context.isTypesafe();
    try {
        final AccumulateDescr accumDescr = (AccumulateDescr) descr;
        if (!accumDescr.hasValidInput()) {
            return null;
        }
        final RuleConditionBuilder builder = (RuleConditionBuilder) context.getDialect().getBuilder(accumDescr.getInput().getClass());
        // create source CE
        final RuleConditionElement source = builder.build(context, accumDescr.getInput());
        if (source == null) {
            return null;
        }
        MVELDialect dialect = (MVELDialect) context.getDialect();
        Map<String, Declaration> decls = context.getDeclarationResolver().getDeclarations(context.getRule());
        Map<String, Declaration> sourceOuterDeclr = source.getOuterDeclarations();
        Map<String, Class<?>> declarationClasses = DeclarationScopeResolver.getDeclarationClasses(decls);
        declarationClasses.putAll(DeclarationScopeResolver.getDeclarationClasses(sourceOuterDeclr));
        BoundIdentifiers boundIds = new BoundIdentifiers(declarationClasses, context);
        final boolean readLocalsFromTuple = PackageBuilderUtil.isReadLocalsFromTuple(context, accumDescr, source);
        Accumulator[] accumulators;
        if (accumDescr.isExternalFunction()) {
            // uses accumulate functions
            accumulators = buildExternalFunctions(context, accumDescr, dialect, decls, sourceOuterDeclr, boundIds, readLocalsFromTuple, source, declarationClasses);
        } else {
            // it is a custom accumulate
            accumulators = buildCustomAccumulate(context, accumDescr, dialect, decls, sourceOuterDeclr, boundIds, readLocalsFromTuple);
        }
        List<Declaration> requiredDeclarations = new ArrayList<Declaration>();
        for (Accumulator acc : accumulators) {
            MvelAccumulator mvelAcc = (MvelAccumulator) acc;
            Collections.addAll(requiredDeclarations, mvelAcc.getRequiredDeclarations());
        }
        MVELDialectRuntimeData data = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData("mvel");
        Accumulate accumulate;
        if (accumDescr.isMultiFunction()) {
            accumulate = new MultiAccumulate(source, requiredDeclarations.toArray(new Declaration[requiredDeclarations.size()]), accumulators, accumulators.length);
            int index = 0;
            for (Accumulator accumulator : accumulators) {
                data.addCompileable(((MultiAccumulate) accumulate).new Wirer(index++), (MVELCompileable) accumulator);
                ((MVELCompileable) accumulator).compile(data, context.getRule());
            }
        } else {
            accumulate = new SingleAccumulate(source, requiredDeclarations.toArray(new Declaration[requiredDeclarations.size()]), accumulators[0]);
            data.addCompileable(((SingleAccumulate) accumulate).new Wirer(), (MVELCompileable) accumulators[0]);
            ((MVELCompileable) accumulators[0]).compile(data, context.getRule());
        }
        return accumulate;
    } catch (Exception e) {
        AsmUtil.copyErrorLocation(e, descr);
        context.addError(new DescrBuildError(context.getParentDescr(), descr, e, "Unable to build expression for 'accumulate' : " + e.getMessage()));
        return null;
    } finally {
        context.setTypesafe(typesafe);
    }
}

Example 17 with AccumulateDescr

use of org.drools.drl.ast.descr.AccumulateDescr in project drools by kiegroup.

the class RuleParserTest method testAccumulateWithNestedFrom.

@Test
public void testAccumulateWithNestedFrom() throws Exception {
    final PackageDescr pkg = (PackageDescr) parseResource("compilationUnit", "accumulate_with_nested_from.drl");
    assertEquals(1, pkg.getRules().size());
    final RuleDescr rule = (RuleDescr) pkg.getRules().get(0);
    assertEquals(1, rule.getLhs().getDescrs().size());
    final PatternDescr out = (PatternDescr) rule.getLhs().getDescrs().get(0);
    final AccumulateDescr accumulate = (AccumulateDescr) out.getSource();
    PatternDescr person = (PatternDescr) accumulate.getInputPattern();
    assertEquals("Person", person.getObjectType());
    final CollectDescr collect2 = (CollectDescr) person.getSource();
    final PatternDescr people = collect2.getInputPattern();
    assertEquals("People", people.getObjectType());
}

Example 18 with AccumulateDescr

use of org.drools.drl.ast.descr.AccumulateDescr in project drools by kiegroup.

the class RuleParserTest method testAccumulateMultipleFunctions.

@Test
public void testAccumulateMultipleFunctions() throws Exception {
    final PackageDescr pkg = (PackageDescr) parseResource("compilationUnit", "accumulateMultipleFunctions.drl");
    assertEquals(1, pkg.getRules().size());
    RuleDescr rule = (RuleDescr) pkg.getRules().get(0);
    assertEquals(1, rule.getLhs().getDescrs().size());
    PatternDescr out = (PatternDescr) rule.getLhs().getDescrs().get(0);
    assertEquals("Object", out.getObjectType());
    AccumulateDescr accum = (AccumulateDescr) out.getSource();
    assertTrue(accum.isExternalFunction());
    List<AccumulateDescr.AccumulateFunctionCallDescr> functions = accum.getFunctions();
    assertEquals(3, functions.size());
    assertEquals("average", functions.get(0).getFunction());
    assertEquals("$a1", functions.get(0).getBind());
    assertEquals("$price", functions.get(0).getParams()[0]);
    assertEquals("min", functions.get(1).getFunction());
    assertEquals("$m1", functions.get(1).getBind());
    assertEquals("$price", functions.get(1).getParams()[0]);
    assertEquals("max", functions.get(2).getFunction());
    assertEquals("$M1", functions.get(2).getBind());
    assertEquals("$price", functions.get(2).getParams()[0]);
    final PatternDescr pattern = (PatternDescr) accum.getInputPattern();
    assertEquals("Cheese", pattern.getObjectType());
}

Example 19 with AccumulateDescr

use of org.drools.drl.ast.descr.AccumulateDescr in project drools by kiegroup.

the class RuleParserTest method testAccumulateExternalFunction.

@Test
public void testAccumulateExternalFunction() throws Exception {
    final PackageDescr pkg = (PackageDescr) parseResource("compilationUnit", "accumulateExternalFunction.drl");
    assertEquals(1, pkg.getRules().size());
    final RuleDescr rule = (RuleDescr) pkg.getRules().get(0);
    assertEquals(1, rule.getLhs().getDescrs().size());
    final PatternDescr out = (PatternDescr) rule.getLhs().getDescrs().get(0);
    final AccumulateDescr accum = (AccumulateDescr) out.getSource();
    assertEqualsIgnoreWhitespace("$age", accum.getFunctions().get(0).getParams()[0]);
    assertEqualsIgnoreWhitespace("average", accum.getFunctions().get(0).getFunction());
    assertTrue(accum.isExternalFunction());
    final PatternDescr pattern = (PatternDescr) accum.getInputPattern();
    assertEquals("Person", pattern.getObjectType());
}

Example 20 with AccumulateDescr

use of org.drools.drl.ast.descr.AccumulateDescr in project drools by kiegroup.

the class RuleParserTest method testAccumulateReverse.

@Test
public void testAccumulateReverse() throws Exception {
    final PackageDescr pkg = (PackageDescr) parseResource("compilationUnit", "accumulateReverse.drl");
    assertEquals(1, pkg.getRules().size());
    final RuleDescr rule = (RuleDescr) pkg.getRules().get(0);
    assertEquals(1, rule.getLhs().getDescrs().size());
    final PatternDescr out = (PatternDescr) rule.getLhs().getDescrs().get(0);
    final AccumulateDescr accum = (AccumulateDescr) out.getSource();
    assertEqualsIgnoreWhitespace("int x = 0 ;", accum.getInitCode());
    assertEqualsIgnoreWhitespace("x++;", accum.getActionCode());
    assertEqualsIgnoreWhitespace("x--;", accum.getReverseCode());
    assertEqualsIgnoreWhitespace("new Integer(x)", accum.getResultCode());
    assertFalse(accum.isExternalFunction());
    final PatternDescr pattern = (PatternDescr) accum.getInputPattern();
    assertEquals("Person", pattern.getObjectType());
}