Package io.github.torand.fastersql.constant

Class NullConstant

java.lang.Object
io.github.torand.fastersql.constant.NullConstant
All Implemented Interfaces:
Constant, Expression, Projection, Sql
public class NullConstant extends Object implements Constant
Represents the 'null' constant value.

  • Method Details

    • sql

      public String sql(Context context)
      Description copied from interface: Sql
      Formats object as an SQL fragment.
      Specified by:
      sql in interface Sql
      Parameters:
      context - the context (incl. dialect).
      Returns:
      the formatted SQL fragment.

    • params

      public Stream<Object> params(Context context)
      Description copied from interface: Sql
      Gets the statement parameters introduced by this fragment.
      Specified by:
      params in interface Sql
      Parameters:
      context - the context (incl. dialect).
      Returns:
      the statement parameters.

    • columnRefs

      public Stream<Column> columnRefs()
      Description copied from interface: Sql
      Gets the columns referenced by this fragment. For validation purposes.
      Specified by:
      columnRefs in interface Sql
      Returns:
      the columns referenced by this fragment.

    • aliasRefs

      public Stream<ColumnAlias> aliasRefs()
      Description copied from interface: Sql
      Gets the column aliases referenced by this fragment. For validation purposes.
      Specified by:
      aliasRefs in interface Sql
      Returns:
      the column aliases referenced by this fragment.

    • as

      public Projection as(String alias)
      Description copied from interface: Projection
      Assigns a column alias (label) for this projection.
      Specified by:
      as in interface Projection
      Parameters:
      alias - the column alias or label.
      Returns:
      the projection with specified alias assigned.

    • alias

      public Optional<ColumnAlias> alias()
      Description copied from interface: Projection
      Gets the column alias (label) assigned for this projection.
      Specified by:
      alias in interface Projection
      Returns:
      the column alias (label) assigned for this projection.

    • value

      public Object value()
      Description copied from interface: Constant
      Gets the constant value.
      Specified by:
      value in interface Constant
      Returns:
      the constant value.

    • forColumn

      public Projection forColumn(Column column)
      Description copied from interface: Constant
      Creates a projection of the constant.
      Specified by:
      forColumn in interface Constant
      Parameters:
      column - the column to associate projection with.
      Returns:
      the projection.