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

org.drools.core.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

            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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                            ((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 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);
                        }
                    }
                }
            }
        } else if ( element instanceof EvalCondition ) {

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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 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);
                        }
                    }
                }
            }
        } else if ( element instanceof EvalCondition ) {

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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 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);
                        }
                    }
                }
            }
        } else if ( element instanceof EvalCondition ) {

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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 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);
                        }
                    }
                }
            }
        } else if ( element instanceof EvalCondition ) {

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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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