Trait/Object

com.thoughtworks.feature

Factory

Related Docs: object Factory | package feature

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trait Factory[Output] extends Serializable

A factory to create new instances, especially dynamic mix-ins.

Author:

杨博 (Yang Bo) <[email protected]>

Source
Factory.scala
Examples:
  1. Given a trait that has an abstract member.

    trait Foo {
      var bar: Int
    }

    When creating a factory for the trait.

    val factory = Factory[Foo]

    Then the newInstance method of the factory should accept one parameter.

    val foo: Foo = factory.newInstance(bar = 1)
    foo.bar should be(1)
  2. ,
  3. Given two traits that have no abstract member.

    trait Foo
    trait Bar

    When creating a factory for mix-in type of the two types.

    val factory = Factory[Foo with Bar]

    Then the newInstance method of the factory should accept no parameters.

    val fooBar: Foo with Bar = factory.newInstance()
    fooBar should be(a[Foo])
    fooBar should be(a[Bar])
  4. ,
  5. Given a trait that contains an abstract method annotated as @inject.

    import com.thoughtworks.feature.Factory.inject
    trait Foo[A] {
      @inject def orderingA: Ordering[A]
    }

    When creating a factory for the trait

    val factory = Factory[Foo[Int]]

    Then the @inject method will be replaced to an implicit value.

    val foo = factory.newInstance()
    foo.orderingA should be(implicitly[Ordering[Int]])

    It will not compile if no implicit value found. For example, Foo[Symbol] requires an implicit value of type Ordering[Symbol], which is not availble.

    "Factory[Foo[Symbol]]" shouldNot compile
Note

@inject works on implicit abstract methods as well.

import com.thoughtworks.feature.Factory.inject
trait Foo[A] {
  @inject implicit def orderingA: Ordering[A]
}
Factory[Foo[Int]].newInstance().orderingA should be(implicitly[Ordering[Int]])
,

Factories may be nested

import com.thoughtworks.feature.Factory.inject
trait Outer {
  trait AbstractParameterApi
  type AbstractParameter <: AbstractParameterApi
  trait InnerApi {
    def foo: AbstractParameter
  }
  type Inner <: InnerApi
  @inject val innerFactory: Factory[Inner]
}
Factory[Outer]
Linear Supertypes
Serializable, Serializable, AnyRef, Any
Type Hierarchy
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. Factory
  2. Serializable
  3. Serializable
  4. AnyRef
  5. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
  1. Public
  2. All

Type Members

  1. abstract type Constructor

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    A function type that returns Output.

    A function type that returns Output.

    The parameter types are all abstract members in Output

Abstract Value Members

  1. abstract val newInstance: Constructor

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    Returns an instance of Output, which overrides abstract members in Output according to parameters pass to this newInstance method.

Concrete Value Members

  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any
  3. def +(other: String): String

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    Implicit information
    This member is added by an implicit conversion from Factory[Output] to any2stringadd[Factory[Output]] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (Factory[Output], B)

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    Implicit information
    This member is added by an implicit conversion from Factory[Output] to ArrowAssoc[Factory[Output]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  6. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any
  7. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  8. def ensuring(cond: (Factory[Output]) ⇒ Boolean, msg: ⇒ Any): Factory[Output]

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    Implicit information
    This member is added by an implicit conversion from Factory[Output] to Ensuring[Factory[Output]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  9. def ensuring(cond: (Factory[Output]) ⇒ Boolean): Factory[Output]

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    Implicit information
    This member is added by an implicit conversion from Factory[Output] to Ensuring[Factory[Output]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  10. def ensuring(cond: Boolean, msg: ⇒ Any): Factory[Output]

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    Implicit information
    This member is added by an implicit conversion from Factory[Output] to Ensuring[Factory[Output]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  11. def ensuring(cond: Boolean): Factory[Output]

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    Implicit information
    This member is added by an implicit conversion from Factory[Output] to Ensuring[Factory[Output]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  12. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  13. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  14. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  15. def formatted(fmtstr: String): String

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    Implicit information
    This member is added by an implicit conversion from Factory[Output] to StringFormat[Factory[Output]] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  16. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any
  17. def hashCode(): Int

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    Definition Classes
    AnyRef → Any
  18. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any
  19. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  20. final def notify(): Unit

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    Definition Classes
    AnyRef
  21. final def notifyAll(): Unit

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    Definition Classes
    AnyRef
  22. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef
  23. def toString(): String

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    Definition Classes
    AnyRef → Any
  24. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  25. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  26. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  27. def [B](y: B): (Factory[Output], B)

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    Implicit information
    This member is added by an implicit conversion from Factory[Output] to ArrowAssoc[Factory[Output]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from Factory[Output] to any2stringadd[Factory[Output]]

Inherited by implicit conversion StringFormat from Factory[Output] to StringFormat[Factory[Output]]

Inherited by implicit conversion Ensuring from Factory[Output] to Ensuring[Factory[Output]]

Inherited by implicit conversion ArrowAssoc from Factory[Output] to ArrowAssoc[Factory[Output]]

Ungrouped