Class: Puppet::Pops::Serialization::JsonPath::Resolver Private

Inherits:
Object
  • Object
show all
Defined in:
lib/puppet/pops/serialization/json_path.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Resolver for JSON path that uses the Puppet parser to create the AST. The path must start with ‘$’ which denotes the value that is passed into the parser. This parser can easily be extended with more elaborate resolution mechanisms involving document sets.

The parser is limited to constructs generated by the JsonPath#to_json_path method.

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Resolver

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of Resolver.



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# File 'lib/puppet/pops/serialization/json_path.rb', line 38

def initialize
  @parser = Parser::Parser.new
  @visitor = Visitor.new(nil, 'resolve', 2, 2)
end

Class Method Details

.singleton ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/puppet/pops/serialization/json_path.rb', line 34

def self.singleton
  @singleton ||= self.new
end

Instance Method Details

#resolve(context, path) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Resolve the given path in the given context.

Parameters:

  • context (Object) —

    the context used for resolution

  • path (String) —

    the json path

Returns:

  • (Object) —

    the resolved value



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# File 'lib/puppet/pops/serialization/json_path.rb', line 48

def resolve(context, path)
  factory = @parser.parse_string(path)
  resolve_any(factory.model.body, context, path)
end

#resolve_AccessExpression(ast, context, path) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/puppet/pops/serialization/json_path.rb', line 57

def resolve_AccessExpression(ast, context, path)
  bad_json_path(path) unless ast.keys.size == 1
  receiver = resolve_any(ast.left_expr, context, path)
  key = resolve_any(ast.keys[0], context, path)
  if receiver.is_a?(Types::PuppetObject)
    PCORE_TYPE_KEY == key ? receiver._pcore_type : receiver.send(key)
  else
    receiver[key]
  end
end

#resolve_any(ast, context, path) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/puppet/pops/serialization/json_path.rb', line 53

def resolve_any(ast, context, path)
  @visitor.visit_this_2(self, ast, context, path)
end

#resolve_CallMethodExpression(ast, context, path) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/puppet/pops/serialization/json_path.rb', line 106

def resolve_CallMethodExpression(ast, context, path)
  bad_json_path(path) unless ast.arguments.empty?
  resolve_any(ast.functor_expr, context, path)
end

#resolve_LiteralDefault(_, _, _) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/puppet/pops/serialization/json_path.rb', line 96

def resolve_LiteralDefault(_, _, _)
  'default'
end

#resolve_LiteralUndef(_, _, _) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/puppet/pops/serialization/json_path.rb', line 92

def resolve_LiteralUndef(_, _, _)
  'undef'
end

#resolve_LiteralValue(ast, _, _) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/puppet/pops/serialization/json_path.rb', line 111

def resolve_LiteralValue(ast, _, _)
  ast.value
end

#resolve_NamedAccessExpression(ast, context, path) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/puppet/pops/serialization/json_path.rb', line 68

def resolve_NamedAccessExpression(ast, context, path)
  receiver = resolve_any(ast.left_expr, context, path)
  key = resolve_any(ast.right_expr, context, path)
  if receiver.is_a?(Types::PuppetObject)
    PCORE_TYPE_KEY == key ? receiver._pcore_type : receiver.send(key)
  else
    receiver[key]
  end
end

#resolve_Object(ast, _, path) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/puppet/pops/serialization/json_path.rb', line 115

def resolve_Object(ast, _, path)
  bad_json_path(path)
end

#resolve_QualifiedName(ast, _, _) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/puppet/pops/serialization/json_path.rb', line 78

def resolve_QualifiedName(ast, _, _)
  v = ast.value
  'null' == v ? nil : v
end

#resolve_QualifiedReference(ast, _, _) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/puppet/pops/serialization/json_path.rb', line 83

def resolve_QualifiedReference(ast, _, _)
  v = ast.cased_value
  'null'.casecmp(v) == 0 ? nil : v
end

#resolve_ReservedWord(ast, _, _) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/puppet/pops/serialization/json_path.rb', line 88

def resolve_ReservedWord(ast, _, _)
  ast.word
end

#resolve_VariableExpression(ast, context, path) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/puppet/pops/serialization/json_path.rb', line 100

def resolve_VariableExpression(ast, context, path)
  # A single '$' means root, i.e. the context.
  bad_json_path(path) unless EMPTY_STRING == resolve_any(ast.expr, context, path)
  context
end