Examples of org.drools.spi.Constraint.replaceDeclaration()

org.drools.spi.Constraint.replaceDeclaration()
When a rule contains multiple logical branches, i.e., makes use of 'OR' CE, it is required to clone patterns and declarations for each logical branch. Since this is done at ReteOO build type, when constraints were already created, eventually some constraints need to update their references to the declarations. @param oldDecl @param newDecl

                        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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            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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            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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                            ((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() );

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                        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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            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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            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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            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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