Package org.drools.core.rule

Examples of org.drools.core.rule.GroupElement

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        assertTrue( pkgBuilder.getErrors().toString(),
                           pkgBuilder.getErrors().isEmpty() );

        final Rule rule = pkgBuilder.getPackages()[0].getRule( "Test Rule" );
        final GroupElement and = rule.getLhs();
        final Pattern pat = (Pattern) and.getChildren().get( 0 );
        if (pat.getConstraints().get(0) instanceof MvelConstraint) {
            final MvelConstraint fc = (MvelConstraint) pat.getConstraints().get( 0 );
            assertTrue( "Wrong class. Expected java.math.BigDecimal. Found: " + fc.getField().getValue().getClass(),
                        fc.getField().getValue() instanceof BigDecimal );
        }
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        assertTrue( pkgBuilder.getErrors().toString(),
                           pkgBuilder.getErrors().isEmpty() );

        final Rule rule = pkgBuilder.getPackages()[0].getRule( "Test Rule" );
        final GroupElement and = rule.getLhs();
        final Pattern pat = (Pattern) and.getChildren().get( 0 );
        if (pat.getConstraints().get(0) instanceof MvelConstraint) {
            final MvelConstraint fc = (MvelConstraint) pat.getConstraints().get( 0 );
            assertTrue( "Wrong class. Expected java.math.BigInteger. Found: " + fc.getField().getValue().getClass(),
                        fc.getField().getValue() instanceof BigInteger );
        }
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                                      builder,
                                      "update(stilton);" );
        assertLength( 0,
                      builder.getErrors().getErrors() );

        final GroupElement lhs = rule.getLhs();
        assertLength( 1,
                      lhs.getChildren() );

        final GroupElement or = (GroupElement) lhs.getChildren().get( 0 );
        assertLength( 1,
                      or.getChildren() );
        final Pattern pattern = (Pattern) or.getChildren().get( 0 );
    }
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        final Pattern pattern = new Pattern( 0,
                                             cheeseObjeectType,
                                             "cheese" );

        final GroupElement subrule = new GroupElement( GroupElement.AND );
        subrule.addChild( pattern );
        final Map<String, Declaration> map = new HashMap<String, Declaration>();
        map.put( "cheese",
                 pattern.getDeclaration() );
        declarationResolver.setDeclarations( map );
        context.setDeclarationResolver( declarationResolver );
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            Pattern prefixPattern = null;
            if ( context.getRuleDescr() instanceof QueryDescr ) {
                prefixPattern = context.getDialect().getQueryBuilder().build( context,
                                                                              (QueryDescr) context.getRuleDescr() );
            }
            final GroupElement ce = (GroupElement) builder.build( context,
                                                                  ruleDescr.getLhs(),
                                                                  prefixPattern );

            context.getRule().setLhs( ce );
        } else {
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    public RuleConditionElement build(final RuleBuildContext context,
                                    final BaseDescr descr,
                                    final Pattern prefixPattern) {
        final ConditionalElementDescr cedescr = (ConditionalElementDescr) descr;

        final GroupElement ge = this.newGroupElementFor( descr );
        context.getBuildStack().push( ge );

        if ( prefixPattern != null ) {
            ge.addChild( prefixPattern );
        }

        // iterate over child descriptors
        for ( final Iterator it = cedescr.getDescrs().iterator(); it.hasNext(); ) {
            // gets child to build
            final BaseDescr child = (BaseDescr) it.next();
            child.setResource(context.getRuleDescr().getResource());
            child.setNamespace(context.getRuleDescr().getNamespace());

            // gets corresponding builder
            final RuleConditionBuilder builder = (RuleConditionBuilder) context.getDialect().getBuilder( child.getClass() );

            if ( builder != null ) {
                final RuleConditionElement element = builder.build( context,
                                                                    child );
                // in case there is a problem with the building,
                // builder will return null. Ex: ClassNotFound for the pattern type
                if ( element != null ) {
                    ge.addChild( element );
                }
            } else {
                throw new RuntimeDroolsException( "BUG: no builder found for descriptor class " + child.getClass() );
            }
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        ConditionalBranchDescr elseBranchDescr = conditionalBranch.getElseBranch();
        return new ConditionalBranch( condition, consequence, elseBranchDescr != null ? build(context, elseBranchDescr, prefixPattern) : null );
    }

    private Pattern getLastPattern(RuleBuildContext context) {
        GroupElement ge = (GroupElement)context.getBuildStack().peek();
        List<RuleConditionElement> siblings = ge.getChildren();
        for (int i = siblings.size()-1; i >= 0; i--) {
            RuleConditionElement element = siblings.get(i);
            if (element instanceof Pattern) {
                return (Pattern) element;
            }
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        RuleDescr ruleDescr = context.getRuleDescr();

        final RuleConditionBuilder builder = (RuleConditionBuilder) context.getDialect().getBuilder( ruleDescr.getLhs().getClass() );
        if ( builder != null ) {
            Pattern prefixPattern = context.getPrefixPattern(); // this is established during pre-processing, if it's query
            final GroupElement ce = (GroupElement) builder.build( context,
                                                                  ruleDescr.getLhs(),
                                                                  prefixPattern );

            context.getRule().setLhs( ce );
        } else {
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        ConditionalBranchDescr elseBranchDescr = conditionalBranch.getElseBranch();
        return new ConditionalBranch( condition, consequence, elseBranchDescr != null ? build(context, elseBranchDescr, prefixPattern) : null );
    }

    private Pattern getLastPattern(RuleBuildContext context) {
        GroupElement ge = (GroupElement)context.getBuildStack().peek();
        Pattern lastPattern = getLastPattern(ge.getChildren());
        if (lastPattern == null) {
            Rule parent = context.getRule().getParent();
            if (parent != null) {
                lastPattern = getLastPattern(parent.getLhs().getChildren());
            }
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            Pattern prefixPattern = null;
            if ( context.getRuleDescr() instanceof QueryDescr ) {
                prefixPattern = context.getDialect().getQueryBuilder().build( context,
                                                                              (QueryDescr) context.getRuleDescr() );
            }
            final GroupElement ce = (GroupElement) builder.build( context,
                                                                  ruleDescr.getLhs(),
                                                                  prefixPattern );

            context.getRule().setLhs( ce );
        } else {
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Related Classes of org.drools.core.rule.GroupElement

  • org.drools.compiler.builder.impl.KnowledgeBuilderTest
  • org.drools.compiler.compiler.PackageBuilderTest
  • org.drools.compiler.rule.builder.ConditionalBranchBuilder
  • org.drools.compiler.rule.builder.dialect.java.RuleBuilderTest
  • org.drools.compiler.rule.builder.dialect.mvel.MVELConsequenceBuilderTest
  • org.drools.compiler.rule.builder.GroupElementBuilder
  • org.drools.compiler.rule.builder.RuleBuilder
  • org.drools.core.common.DroolsObjectIOTest
  • org.drools.core.definitions.rule.impl.RuleImpl
  • org.drools.core.examples.manners.BaseMannersTest
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