Class: Graffiti::SquishAssert

Inherits:
SquishQuery show all
Defined in:
lib/graffiti/squish.rb

Constant Summary

Constants inherited from SquishQuery

Graffiti::SquishQuery::AGGREGATE, Graffiti::SquishQuery::BN, Graffiti::SquishQuery::BN_SCAN, Graffiti::SquishQuery::INTERNAL, Graffiti::SquishQuery::LITERAL, Graffiti::SquishQuery::LITERAL_SCAN, Graffiti::SquishQuery::NUMBER, Graffiti::SquishQuery::OPERATOR, Graffiti::SquishQuery::PARAMETER, Graffiti::SquishQuery::PARAMETER_AND_LITERAL_SCAN, Graffiti::SquishQuery::QUERY

Instance Attribute Summary collapse

Attributes inherited from SquishQuery

#group, #literal, #nodes, #ns, #order, #order_dir, #pattern, #variables

Instance Method Summary collapse

Methods inherited from SquishQuery

#ns_shrink, ns_shrink, #substitute_literals, #to_s, uri_shrink!, #validate_expression

Constructor Details

#initialize(config, query) ⇒ SquishAssert

Returns a new instance of SquishAssert.



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# File 'lib/graffiti/squish.rb', line 316

def initialize(config, query)
  @config = config
  super(@config, query)

  if 'UPDATE' == @key
    @insert = ''
    @update = @nodes

  elsif 'INSERT' == @key and @nodes =~ /\A\s*(.*?)\s*(?:\bUPDATE\b\s*(.*?))?\s*\z/
    @insert, @update = $1, $2.to_s

  else
    raise ProgrammingError,
      "Wrong query type: INSERT or UPDATE expected instead of " + @key
  end

  @insert = @insert.split(/\s*,\s*/).each {|s|
    s =~ BN or raise ProgrammingError,
      "Blank node expected in INSERT section instead of '#{s}'"
  }

  @update = @update.empty? ? {} : Hash[*@update.split(/\s*,\s*/).collect {|s|
    s.split(/\s*=\s*/)
  }.each {|node, value|
    node =~ BN or raise ProgrammingError,
      "Blank node expected on the left side of UPDATE assignment instead of '#{bn}'"
    validate_expression(value)
  }.flatten!]
end

Instance Attribute Details

#insert ⇒ Object (readonly)

Returns the value of attribute insert.



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# File 'lib/graffiti/squish.rb', line 359

def insert
  @insert
end

#update ⇒ Object (readonly)

Returns the value of attribute update.



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# File 'lib/graffiti/squish.rb', line 359

def update
  @update
end

Instance Method Details

#run(db, params = {}) ⇒ Object 



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# File 'lib/graffiti/squish.rb', line 346

def run(db, params={})
  values = resource_values(db, params)

  statements = []
  alias_positions.each do |alias_, clauses|
    statement = SquishAssertStatement.new(clauses, values)
    statements.push(statement) if statement.action
  end
  SquishAssertStatement.run_ordered_statements(db, statements)

  return @insert.collect {|node| values[node].value }
end