Package org.drools.spi

Examples of org.drools.spi.Constraint

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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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            }
            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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            }
        }

        for ( final Iterator it = this.constraints.iterator(); it.hasNext(); ) {
            final Object constr = it.next();
            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 ( restriction == null ) {
            // error was already logged during restriction creation failure
            return;
        }

        Constraint constraint = null;
        if ( restriction instanceof AbstractCompositeRestriction ) {
            constraint = new MultiRestrictionFieldConstraint( extractor,
                                                              restriction );
        } else if ( restriction instanceof LiteralRestriction ) {
            constraint = new LiteralConstraint( extractor,
                                                (LiteralRestriction) restriction );
            registerReadAccessor( context,
                                  pattern.getObjectType(),
                                  fieldName,
                                  (LiteralConstraint) constraint );
            registerReadAccessor( context,
                                  pattern.getObjectType(),
                                  fieldName,
                                  (LiteralRestriction) restriction );
        } else if ( restriction instanceof VariableRestriction ) {
            constraint = new VariableConstraint( extractor,
                                                 (VariableRestriction) restriction );
            registerReadAccessor( context,
                                  pattern.getObjectType(),
                                  fieldName,
                                  (VariableRestriction) restriction );
            registerReadAccessor( context,
                                  pattern.getObjectType(),
                                  fieldName,
                                  (VariableRestriction) restriction );
        } else if ( restriction instanceof ReturnValueRestriction ) {
            constraint = new ReturnValueConstraint( extractor,
                                                    (ReturnValueRestriction) restriction );
            registerReadAccessor( context,
                                  pattern.getObjectType(),
                                  fieldName,
                                  (ReturnValueConstraint) constraint );
            registerReadAccessor( context,
                                  pattern.getObjectType(),
                                  fieldName,
                                  (ReturnValueRestriction) restriction );
        } else {
            context.getErrors().add( new DescrBuildError( context.getParentDescr(),
                                                          fieldConstraintDescr,
                                                          null,
                                                          "This is a bug: Unkown restriction type '" + restriction.getClass() + "' for pattern '" + pattern.getObjectType().toString() + "' in rule '" + context.getRule().getName() + "'" ) );
        }

        if ( container == null ) {
            pattern.addConstraint( constraint );
        } else {
            if ( constraint.getType().equals( Constraint.ConstraintType.UNKNOWN ) ) {
                this.setConstraintType( pattern,
                                        (MutableTypeConstraint) constraint );
            }
            container.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 ) ) {
                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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            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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            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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            for ( Iterator it = pattern.getConstraints().iterator(); it.hasNext(); ) {
                Object next = it.next();
                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 VariableConstraint && ((VariableConstraint)constraint).getRestriction() instanceof UnificationRestriction ) {
                        UnificationRestriction restriction = ( UnificationRestriction ) ((VariableConstraint)constraint).getRestriction();
                        if( ClassObjectType.DroolsQuery_ObjectType.isAssignableFrom( resolved.getPattern().getObjectType() ) ) {
                            // if the resolved still points to DroolsQuery, we know this is the first unification pattern, so redeclare it as the visible Declaration
                            Declaration redeclaredDeclr = new Declaration(resolved.getIdentifier(), restriction.getVariableRestriction().getReadAccessor(), pattern, false );
                            pattern.addDeclaration(  redeclaredDeclr );
                        } else if ( resolved.getPattern() != pattern ) {
                            // It's a subsequent unification, so it should be able to use the redeclared Declaration as a normal VariableRestriction.
                            // but only rewrite if the resolved declaration is not for current pattern (this occurs if LogicTransformer is applied twice
                            // to the same tree that has already been rewritten before.
                            ((VariableConstraint)constraint).setRestriction( restriction.getVariableRestriction() );
                        }
                    }                   
                   
                    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 ( 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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            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 ) ) {
                utils.checkUnboundDeclarations( context,
                                                constraint.getRequiredDeclarations() );
                betaConstraints.add( constraint );
            } else {
                throw new RuntimeDroolsException( "Unknown constraint type: "+constraint.getType()+". This is a bug. Please contact development team.");
            }
        }
    }
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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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