Module is.codion.framework.domain
Package is.codion.framework.domain.entity.attribute

Interface ColumnTemplate<T>

Type Parameters:
T - the column type
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface ColumnTemplate<T>
Specifies a reusable column configuration. 
 ColumnTemplate<Integer> REQUIRED_POSITIVE =
         column -> column.as()
                 .column()
                 .nullable(false)
                 .minimum(0);

 Customer.AGE.as(REQUIRED_POSITIVE)
         .caption("Age")

A template configures the column from the ground up, so it is free to use any Column.ColumnDefiner method, a subquery or primary key column is templated just like a regular one. 

 static ColumnTemplate<Integer> count(String subquery) {
     return column -> column.as()
             .subquery(subquery)
             .numberGrouping(true);
 }

Templates compose by applying the one being extended. 

 ColumnTemplate<String> NAME =
         column -> column.as()
                 .column()
                 .maximumLength(50)
                 .searchable(true);

 ColumnTemplate<String> REQUIRED_NAME =
         column -> NAME.apply(column)
                 .nullable(false);
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    ColumnDefinition.Builder<T,?>
    apply(Column<T> column)
    Applies this template to the given column