Package org.drools.spi

Examples of org.drools.spi.Constraint

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                addedDeclaration.setBindingName( decl.getBindingName() );
            }
        }

        for ( Constraint oldConstr : this.constraints ) {
            Constraint clonedConstr = oldConstr.clone();

            // we must update pattern references in cloned declarations
            Declaration[] oldDecl = oldConstr.getRequiredDeclarations();
            Declaration[] newDecl = clonedConstr.getRequiredDeclarations();
            for ( int i = 0; i < newDecl.length; i++ ) {
                if ( newDecl[i].getPattern() == this ) {
                    newDecl[i].setPattern( clone );
                    // we still need to call replace because there might be nested declarations to replace
                    clonedConstr.replaceDeclaration( oldDecl[i],
                                                     newDecl[i] );
                }
            }

            clone.addConstraint(clonedConstr);
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        }

        String expression = expressionBuilder.toString();
        MVELCompilationUnit compilationUnit = getConstraintBuilder( context ).buildCompilationUnit(context, pattern, expression, mvelCtx.getAliases());

        Constraint combinedConstraint = getConstraintBuilder( context ).buildMvelConstraint( packageName,
                                                                                             expression,
                                                                                             declarations.toArray(new Declaration[declarations.size()]),
                                                                                             compilationUnit,
                                                                                             IndexUtil.ConstraintType.UNKNOWN,
                                                                                             null, null, false );
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        LiteralRestrictionDescr restrictionDescr = buildLiteralRestrictionDescr(context, relDescr, value2, operator, isConstant);

        if (restrictionDescr != null) {
            FieldValue field = getFieldValue(context, vtype, restrictionDescr);
            if (field != null) {
                Constraint constraint = getConstraintBuilder( context ).buildLiteralConstraint(context, pattern, vtype, field, expr, value1, operator, value2, extractor, restrictionDescr);
                if (constraint != null) {
                    pattern.addConstraint(constraint);
                    return true;
                }
            }
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            boolean isDynamic = requiredOperators.length > 0 ||
                    ClassObjectType.Activation_ObjectType.isAssignableFrom( pattern.getObjectType()) ||
                    (!((ClassObjectType)pattern.getObjectType()).getClassType().isArray() &&
                    !context.getPackageBuilder().getTypeDeclaration(((ClassObjectType)pattern.getObjectType()).getClassType()).isTypesafe());

            Constraint constraint = getConstraintBuilder( context ).buildMvelConstraint( context.getPkg().getName(), expr, mvelDeclarations, compilationUnit, isDynamic );
            pattern.addConstraint( constraint );
        }
    }
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            if ( object instanceof Declaration ) {
                // nothing to be done
                continue;
            }

            final Constraint constraint = (Constraint) object;
            if ( constraint.getType().equals( Constraint.ConstraintType.ALPHA ) ) {
                linkAlphaConstraint( (AlphaNodeFieldConstraint) constraint, alphaConstraints );
            } else if ( constraint.getType().equals( Constraint.ConstraintType.BETA ) ) {
                linkBetaConstraint( (BetaNodeFieldConstraint) constraint, betaConstraints );
                if ( isNegative && context.getRuleBase().getConfiguration().getEventProcessingMode() == EventProcessingOption.STREAM && pattern.getObjectType().isEvent() && constraint.isTemporal() ) {
                    checkDelaying( context,
                            constraint );
                }
            } else {
                throw new RuntimeDroolsException( "Unknown constraint type: " + constraint.getType() + ". This is a bug. Please contact development team." );
            }

        }
    }
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            }
            for (Constraint next : pattern.getConstraints()) {
                if (next instanceof Declaration) {
                    continue;
                }
                Constraint constraint = (Constraint) next;
                Declaration[] decl = constraint.getRequiredDeclarations();
                for (int i = 0; i < decl.length; i++) {
                    Declaration resolved = resolver.getDeclaration(null,
                            decl[i].getIdentifier());

                    if (constraint instanceof MvelConstraint && ((MvelConstraint) constraint).isUnification()) {
                        if (ClassObjectType.DroolsQuery_ObjectType.isAssignableFrom(resolved.getPattern().getObjectType())) {
                            Declaration redeclaredDeclr = new Declaration(resolved.getIdentifier(), ((MvelConstraint) constraint).getFieldExtractor(), pattern, false);
                            pattern.addDeclaration(redeclaredDeclr);
                        } else {
                            ((MvelConstraint) constraint).unsetUnification();
                        }
                    }

                    if (resolved != null && resolved != decl[i] && resolved.getPattern() != pattern) {
                        constraint.replaceDeclaration(decl[i],
                                resolved);
                    } else if (resolved == null) {
                        // it is probably an implicit declaration, so find the corresponding pattern
                        Pattern old = decl[i].getPattern();
                        Pattern current = resolver.findPatternByIndex(old.getIndex());
                        if (current != null && old != current) {
                            resolved = new Declaration(decl[i].getIdentifier(),
                                    decl[i].getExtractor(),
                                    current);
                            constraint.replaceDeclaration(decl[i],
                                    resolved);
                        }
                    }
                }
            }
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            if ( object instanceof Declaration ) {
                // nothing to be done
                continue;
            }

            final Constraint constraint = (Constraint) object;
            if ( constraint.getType().equals( Constraint.ConstraintType.ALPHA ) ) {
                alphaConstraints.add( constraint );
            } else if ( constraint.getType().equals( Constraint.ConstraintType.BETA ) ) {
                betaConstraints.add( constraint );
                if ( isNegative && context.getRuleBase().getConfiguration().getEventProcessingMode() == EventProcessingOption.STREAM && pattern.getObjectType().isEvent() && constraint.isTemporal() ) {
                    checkDelaying( context,
                                   constraint );
                }
            } else {
                throw new RuntimeDroolsException( "Unknown constraint type: " + constraint.getType() + ". This is a bug. Please contact development team." );
            }
        }
    }
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        //  column3 : Column(name == "column3")
        //  exists StringCell(row == r, column == column3, value == "xyz")
        assertEquals(7, lhs.getChildren().size());
        org.drools.rule.Pattern pattern = (org.drools.rule.Pattern) lhs.getChildren().get(1);
        assertEquals(1, pattern.getConstraints().size());
        Constraint constraint = pattern.getConstraints().get(0);
        GroupElement exists = (GroupElement) lhs.getChildren().get(2);
        pattern = (org.drools.rule.Pattern) exists.getChildren().get(0);
        assertEquals(3, pattern.getConstraints().size());
        IndexableConstraint vconstraint = (IndexableConstraint)pattern.getConstraints().get(1);
        assertEquals(Column.class, vconstraint.getFieldIndex().getExtractor().getExtractToClass());
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            final Object constr = it.next();
            if ( constr instanceof Declaration ) {
                final Declaration decl = (Declaration) constr;
                clone.addDeclaration( decl.getIdentifier() ).setReadAccessor( decl.getExtractor() );
            } else {
                Constraint constraint = (Constraint) ((Constraint) constr).clone();

                // we must update pattern references in cloned declarations
                Declaration[] oldDecl = ((Constraint) constr).getRequiredDeclarations();
                Declaration[] newDecl = constraint.getRequiredDeclarations();
                for ( int i = 0; i < newDecl.length; i++ ) {
                    if ( newDecl[i].getPattern() == this ) {
                        newDecl[i].setPattern( clone );
                        // we still need to call replace because there might be nested declarations to replace
                        constraint.replaceDeclaration( oldDecl[i],
                                                       newDecl[i] );
                    }
                }

                clone.addConstraint( constraint );
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        if ( this.indexed >= 0 ) {
            LinkedListEntry entry = (LinkedListEntry) this.constraints.getFirst();
            final List list = new ArrayList();

            for ( int pos = 0; pos <= this.indexed; pos++ ) {
                final Constraint constraint = (Constraint) entry.getObject();
                final VariableConstraint variableConstraint = (VariableConstraint) constraint;
                final FieldIndex index = new FieldIndex( variableConstraint.getFieldExtractor(),
                                                         variableConstraint.getRequiredDeclarations()[0],
                                                         variableConstraint.getEvaluator() );
                list.add( index );
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Related Classes of org.drools.spi.Constraint

  • org.drools.common.DefaultBetaConstraints
  • org.drools.compiler.PackageBuilderTest
  • org.drools.eclipse.editors.rete.model.VertexPropertySource
  • org.drools.reteoo.builder.PatternBuilder
  • org.drools.rule.builder.dialect.java.JavaDialectBinaryEqualityTest
  • org.drools.rule.builder.PatternBuilder
  • org.drools.rule.LogicTransformer
  • org.drools.rule.Pattern
  • org.drools.template.parser.DefaultTemplateRuleBaseTest
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