Column

Daobab Column is a base interface, represented DataBase column, which is a part of table.

The name and context of this library depends of column name and type.

Each column, identified by name and type has own interface created.

Interface may be inherited by every Entity.

This construction recreates relations between tables

Interface collects informations as follows:

DataBase column name
to communicate with database
Java field name
A key into Entity map
Object Type
Class Type for column values
Relation to Entity
Which Entity contains the column.
This information is generic, provided through Class type during Entity initialisation.

public interface Name<E extends EntityMap, F> extends EntityRelationMap<E> {

    default F getName() {
        return getColumnParam("Name");
    }

    @SuppressWarnings("unchecked")
    default E setName(F val) {
        setColumnParam("Name", val);
        return (E) this;
    }

    @SuppressWarnings({"rawtypes","unchecked"})
    /*
     table:CATEGORY,type:VARCHAR,size:25,nullable:false
     table:LANGUAGE,type:VARCHAR,size:20,nullable:false
     */
    default Column<E, F, Name> colName() {
        return new Column<E, F, Name>() {

           @Override
            public String getColumnName() {
                return "NAME";
            }

            @Override
            public String getFieldName() {
                return "Name";
            }

            @Override
            public E getInstance(){
                return getEntity();
            }

            @Override
            public Class getFieldClass() {
                return String.class;
            }

            @Override
            public F getValue(Name entity) {
                if (entity == null) throw new AttemptToReadFromNullEntityException(getEntityClass(), "Name");
                return (F) entity.getName();
            }

            @Override
            public void setValue(Name entity, F param) {
                if (entity == null) throw new AttemptToWriteIntoNullEntityException(getEntityClass(), "Name");
                entity.setName(param);
            }

            @Override
            public int hashCode() {
                return toString().hashCode();
            }

            @Override
            public String toString(){
                return getEntityName()+"."+getFieldName();
            }

            @Override
            public boolean equals(Object obj) {
                if (this == obj)return true;
                if (obj == null)return false;
                if (getClass() != obj.getClass())return false;
                Column other = (Column) obj;
                return Objects.equals(hashCode(), other.hashCode());
            }
        };
    }

}

Column

Unique name and type