protected void bindManyToOne()

in grails-datastore-gorm-hibernate/src/main/groovy/org/grails/orm/hibernate/cfg/GrailsDomainBinder.java [2327:2374]
43 lines of code
13 McCabe index (conditional complexity)

    protected void bindManyToOne(Association property, ManyToOne manyToOne,
                                 String path, InFlightMetadataCollector mappings, String sessionFactoryBeanName) {

        NamingStrategy namingStrategy = getNamingStrategy(sessionFactoryBeanName);

        bindManyToOneValues(property, manyToOne);
        PersistentEntity refDomainClass = property instanceof ManyToMany ? property.getOwner() : property.getAssociatedEntity();
        Mapping mapping = getMapping(refDomainClass);
        boolean isComposite = hasCompositeIdentifier(mapping);
        if (isComposite) {
            CompositeIdentity ci = (CompositeIdentity) mapping.getIdentity();
            bindCompositeIdentifierToManyToOne(property, manyToOne, ci, refDomainClass, path, sessionFactoryBeanName);
        }
        else {
            if (property.isCircular() && (property instanceof ManyToMany)) {
                PropertyConfig pc = getPropertyConfig(property);

                if (pc.getColumns().isEmpty()) {
                    mapping.getColumns().put(property.getName(), pc);
                }
                if (!hasJoinKeyMapping(pc) ) {
                    JoinTable jt = new JoinTable();
                    final ColumnConfig columnConfig = new ColumnConfig();
                    columnConfig.setName(namingStrategy.propertyToColumnName(property.getName()) +
                            UNDERSCORE + FOREIGN_KEY_SUFFIX);
                    jt.setKey(columnConfig);
                    pc.setJoinTable(jt);
                }
                bindSimpleValue(property, manyToOne, path, pc, sessionFactoryBeanName);
            }
            else {
                // bind column
                bindSimpleValue(property, null, manyToOne, path, mappings, sessionFactoryBeanName);
            }
        }

        PropertyConfig config = getPropertyConfig(property);
        if ((property instanceof org.grails.datastore.mapping.model.types.OneToOne) && !isComposite) {
            manyToOne.setAlternateUniqueKey(true);
            Column c = getColumnForSimpleValue(manyToOne);
            if (config != null && !config.isUniqueWithinGroup()) {
                c.setUnique(config.isUnique());
            }
            else if (property.isBidirectional() && isHasOne(property.getInverseSide())) {
                c.setUnique(true);
            }
        }
    }