Column

Daobab Column is a base interface, representing DataBase column, being a part of table.

Each column, identified by name and type has own interface created. Entity class inretites as many column interfaces as the related database table has column.

This construction help to recreate the relations between tables. For example when a table has a PrimaryKey and an other table has a ForeignKey to first table, both inherites the same column.

Column interface exposes proper getter and setter to the column value.

Each column-related table is generated by Daobab generator. Contains an unique name and is located into column package.

Apart of getter and setter, the interface expose a method with 'col' prefix which provides a cached object describing the real column and Java related objects such as:

DataBase column name
The real database column name
Java field name
Name used as a key into internal Map containing the entity fields.
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