Filter class abstract

Representing filter arguments in a uniform, abstract way.

To allow different DatabaseAdapter implementations to interpret or implement filtering in different ways (e.g. convert to SQL statements) this is a uniform representation of filter arguments.

All Filter implementations are immutable.

Implementers

• CompareFilter
• CustomSqlCondition
• FilterGroup

Constructors

Filter()

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

isEmpty → bool

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

and(Filter other) → Filter

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

or(Filter other) → Filter

reduce() → Filter

Tries to simplify the Filter structure to avoid redundancy.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

andGroup(Iterable<Filter> filters) → Filter

Returns the smallest representation of the "And" group of filters.

equals(dynamic left, dynamic right) → CompareFilter

Convenience method for creating a CompareFilter filter with compare type CompareType.equals.

notEquals(dynamic left, dynamic right) → CompareFilter

Convenience method for creating a CompareFilter filter with compare type CompareType.notEquals.

orGroup(Iterable<Filter> filters) → Filter

Returns the smallest representation of the "Or" group of filters.

Constants

empty → const Filter

Returns the representation of "no filter".