Examples with RuleConditionBuilder org.drools.compiler.rule.builder.RuleConditionBuilder used on opensource projects

Example 1 with RuleConditionBuilder

use of org.drools.compiler.rule.builder.RuleConditionBuilder in project drools by kiegroup.

the class JavaAccumulateBuilder method build.

public RuleConditionElement build(final RuleBuildContext context, final BaseDescr descr, final Pattern prefixPattern) {
    final AccumulateDescr accumDescr = (AccumulateDescr) descr;
    if (!accumDescr.hasValidInput()) {
        return null;
    }
    // build source
    BaseDescr input = accumDescr.getInput();
    if (input instanceof AndDescr && ((AndDescr) input).getDescrs().size() == 1) {
        input = ((AndDescr) input).getDescrs().get(0);
    }
    final RuleConditionBuilder builder = (RuleConditionBuilder) context.getDialect().getBuilder(input.getClass());
    final RuleConditionElement source = builder.build(context, input);
    if (source == null) {
        return null;
    }
    final boolean readLocalsFromTuple = PackageBuilderUtil.isReadLocalsFromTuple(context, accumDescr, source);
    Map<String, Declaration> declsInScope = context.getDeclarationResolver().getDeclarations(context.getRule());
    Map<String, Class<?>> declCls = DeclarationScopeResolver.getDeclarationClasses(declsInScope);
    Accumulate accumulate;
    if (accumDescr.isExternalFunction()) {
        // if it uses 1+ external function, build methods for them
        accumulate = buildExternalFunctionCall(context, accumDescr, source, declsInScope, declCls, readLocalsFromTuple);
    } else {
        // if it uses inline code, build the class for it
        accumulate = buildInlineAccumulate(context, accumDescr, source, declsInScope, declCls, readLocalsFromTuple);
    }
    return accumulate;
}

Example 2 with RuleConditionBuilder

use of org.drools.compiler.rule.builder.RuleConditionBuilder in project drools by kiegroup.

the class KnowledgeBuilderImpl method processWindowDeclarations.

private void processWindowDeclarations(PackageRegistry pkgRegistry, PackageDescr packageDescr) {
    for (WindowDeclarationDescr wd : packageDescr.getWindowDeclarations()) {
        WindowDeclaration window = new WindowDeclaration(wd.getName(), packageDescr.getName());
        // TODO: process annotations
        // process pattern
        InternalKnowledgePackage pkg = pkgRegistry.getPackage();
        DialectCompiletimeRegistry ctr = pkgRegistry.getDialectCompiletimeRegistry();
        RuleDescr dummy = new RuleDescr(wd.getName() + " Window Declaration");
        dummy.setResource(packageDescr.getResource());
        dummy.addAttribute(new AttributeDescr("dialect", "java"));
        RuleBuildContext context = new RuleBuildContext(this, dummy, ctr, pkg, ctr.getDialect(pkgRegistry.getDialect()));
        final RuleConditionBuilder builder = (RuleConditionBuilder) context.getDialect().getBuilder(wd.getPattern().getClass());
        if (builder != null) {
            final Pattern pattern = (Pattern) builder.build(context, wd.getPattern(), null);
            if (pattern.getXpathConstraint() != null) {
                context.addError(new DescrBuildError(wd, context.getParentDescr(), null, "OOpath expression " + pattern.getXpathConstraint() + " not allowed in window declaration\n"));
            }
            window.setPattern(pattern);
        } else {
            throw new RuntimeException("BUG: assembler not found for descriptor class " + wd.getPattern().getClass());
        }
        if (!context.getErrors().isEmpty()) {
            for (DroolsError error : context.getErrors()) {
                addBuilderResult(error);
            }
        } else {
            pkgRegistry.getPackage().addWindowDeclaration(window);
        }
    }
}

Example 3 with RuleConditionBuilder

use of org.drools.compiler.rule.builder.RuleConditionBuilder 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);
        } 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);
            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) {
        DialectUtil.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);
    }
}