Class: PuppetDBQuery::Parser

Inherits:

Object

• Object
• PuppetDBQuery::Parser

Includes:

Logging

Defined in:

lib/puppetdb_query/parser.rb

Overview

parse a puppetdb query string into #PuppetDBQuery::Term s rubocop:disable Metrics/ClassLength

Constant Summary

AND =

these are the operators we understand rubocop:disable Style/ExtraSpacing

Operator.new(:_and,              true,  100, 2)

OR =

Operator.new(:_or,               true,   90, 2)

NOT =

Operator.new(:_not,              false, 150, 1, 1)

EQUAL =

Operator.new(:_equal,            true,  200, 2, 2)

NOT_EQUAL =

Operator.new(:_not_equal,        true,  200, 2, 2)

LESS =

Operator.new(:_less,             true,  190, 2, 2)

LESS_OR_EQUAL =

Operator.new(:_less_or_equal,    true,  190, 2, 2)

GREATER =

Operator.new(:_greater,          true,  190, 2, 2)

GREATER_OR_EQUAL =

Operator.new(:_greater_or_equal, true,  190, 2, 2)

MATCH =

Operator.new(:_match,            true,  200, 2, 2)

IN =

Operator.new(:_in,               true,  200, 2, 2)

OPERATORS =

map certain symbols (we get them from a tokenizer) to our operators

{
  AND.symbol              =>  AND,
  OR.symbol               =>  OR,
  NOT.symbol              =>  NOT,
  EQUAL.symbol            =>  EQUAL,
  :_is                    =>  EQUAL,
  NOT_EQUAL.symbol        =>  NOT_EQUAL,
  MATCH.symbol            =>  MATCH,
  IN.symbol               =>  IN,
  LESS.symbol             =>  LESS,
  LESS_OR_EQUAL.symbol    =>  LESS_OR_EQUAL,
  GREATER.symbol          =>  GREATER,
  GREATER_OR_EQUAL.symbol =>  GREATER_OR_EQUAL,
}.freeze

Instance Attribute Summary

• #position ⇒ Object readonly

  current parsing position in array of symbols.

• #symbols ⇒ Object readonly

  array of symbols.

Class Method Summary

• .parse(puppetdb_query) ⇒ Object

Instance Method Summary

• #parse(query) ⇒ Object

  parse query and get resulting array of PuppetDBQuery::Term s.

Methods included from Logging

included, #logger, #logger=

Instance Attribute Details

#position ⇒ Object (readonly)

current parsing position in array of symbols

# File 'lib/puppetdb_query/parser.rb', line 48

def position
  @position
end

#symbols ⇒ Object (readonly)

array of symbols

# File 'lib/puppetdb_query/parser.rb', line 47

def symbols
  @symbols
end

Class Method Details

.parse(puppetdb_query) ⇒ Object

# File 'lib/puppetdb_query/parser.rb', line 12

def self.parse(puppetdb_query)
  Parser.new.parse(puppetdb_query)
end

Instance Method Details

#parse(query) ⇒ Object

parse query and get resulting array of PuppetDBQuery::Term s

# File 'lib/puppetdb_query/parser.rb', line 51

def parse(query)
  @symbols = Tokenizer.symbols(query)
  @position = 0
  r = []
  r << read_maximal_term(0) until empty?
  r
end