Class: Puppet::Pops::Binder::Producers::ProducerProducer

Inherits:

Producer

• Object
• Producer
• Puppet::Pops::Binder::Producers::ProducerProducer

Defined in:

lib/puppet/pops/binder/producers.rb

Overview

A ProducerProducer creates a producer via another producer, and then uses this created producer to produce values. This is useful for custom production of series of values. On each request for a producer, this producer will reset its internal producer (i.e. restarting the series).

Instance Attribute Summary

• #producer_producer ⇒ Object readonly
• #value_producer ⇒ Object readonly

Attributes inherited from Producer

#transformer

Instance Method Summary

• #initialize(injector, binding, scope, options) ⇒ ProducerProducer constructor

  Creates new ProducerProducer given a producer.

• #producer(scope) ⇒ Object

  Updates the internal state to use a new instance of the wrapped producer.

Methods inherited from Producer

#produce

Constructor Details

#initialize(injector, binding, scope, options) ⇒ ProducerProducer

Creates new ProducerProducer given a producer.

Parameters:

• injector (Puppet::Pops::Binder::Injector) —

  The injector where the lookup originates

• binding (Puppet::Pops::Binder::Bindings::Binding, nil) —

  The binding using this producer

• scope (Puppet::Parser::Scope) —

  The scope to use for evaluation

• options (Hash) —

  a customizable set of options

Options Hash (options):

• :transformer (Puppet::Pops::Model::LambdaExpression) — default: nil —

  a transformer of produced value

• :producer_producer (Puppet::Pops::Binder::Producer) —

  a producer of a value producer (required)

Raises:

• (ArgumentError)

# File 'lib/puppet/pops/binder/producers.rb', line 431

def initialize(injector, binding, scope, options)
  super
  unless producer_producer = options[:producer_producer]
    raise ArgumentError, "The option :producer_producer must be set in a ProducerProducer"
  end
  raise ArgumentError, "Argument must be a Producer" unless producer_producer.is_a?(Producer)

  @producer_producer = producer_producer
  @value_producer = nil
end

Instance Attribute Details

#producer_producer ⇒ Object (readonly)

# File 'lib/puppet/pops/binder/producers.rb', line 416

def producer_producer
  @producer_producer
end

#value_producer ⇒ Object (readonly)

# File 'lib/puppet/pops/binder/producers.rb', line 419

def value_producer
  @value_producer
end

Instance Method Details

#producer(scope) ⇒ Object

Updates the internal state to use a new instance of the wrapped producer.

# File 'lib/puppet/pops/binder/producers.rb', line 445

def producer(scope)
  @value_producer = @producer_producer.produce(scope)
  self
end