Class: SQL::Composer::Compiler

Inherits:
Object
  • Object
show all
Defined in:
lib/sql/composer/compiler.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(backend, options) ⇒ Compiler 



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# File 'lib/sql/composer/compiler.rb', line 20

def initialize(backend, options)
  @backend = backend
  @options = options
  @nodes = options[:nodes] || []
  @tokens = options[:tokens]
end

Instance Attribute Details

#backend ⇒ Object (readonly)

Returns the value of attribute backend.



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# File 'lib/sql/composer/compiler.rb', line 12

def backend
  @backend
end

#nodes ⇒ Object (readonly)

Returns the value of attribute nodes.



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# File 'lib/sql/composer/compiler.rb', line 14

def nodes
  @nodes
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/sql/composer/compiler.rb', line 16

def options
  @options
end

#tokens ⇒ Object (readonly)

Returns the value of attribute tokens.



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# File 'lib/sql/composer/compiler.rb', line 18

def tokens
  @tokens
end

Instance Method Details

#call(ast) ⇒ Object 



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# File 'lib/sql/composer/compiler.rb', line 27

def call(ast)
  with_tokens(tokens) { ast.map { |node| visit(node) } }
  Statement.new(compiler: freeze)
end

#to_s ⇒ Object 



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# File 'lib/sql/composer/compiler.rb', line 36

def to_s
  with_tokens(tokens) { nodes.map(&:to_s).join("\n") }.last
end

#visit(node) ⇒ Object 



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# File 'lib/sql/composer/compiler.rb', line 40

def visit(node)
  visitor, *args = node
  __send__(:"visit_#{visitor}", args)
  self
end

#visit_from(node) ⇒ Object 



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# File 'lib/sql/composer/compiler.rb', line 50

def visit_from(node)
  source, _ = node
  add_node(Nodes::From, source: source)
end

#visit_literal(node) ⇒ Object 



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# File 'lib/sql/composer/compiler.rb', line 46

def visit_literal(node)
  add_node(Nodes::Literal, value: node[0])
end

#visit_order(node) ⇒ Object 



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# File 'lib/sql/composer/compiler.rb', line 63

def visit_order(node)
  add_node(Nodes::Order, operations: node)
end

#visit_select(nodes) ⇒ Object 



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# File 'lib/sql/composer/compiler.rb', line 55

def visit_select(nodes)
  add_node(Nodes::Select, identifiers: nodes)
end

#visit_where(node) ⇒ Object 



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# File 'lib/sql/composer/compiler.rb', line 59

def visit_where(node)
  add_node(Nodes::Where, operations: node)
end

#with(new_options) ⇒ Object 



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# File 'lib/sql/composer/compiler.rb', line 32

def with(new_options)
  self.class.new(backend, options.merge(new_options).merge(nodes: nodes))
end