Class: Norikra::Query::ASTLibFunctionNode

Inherits:
ASTNode
  • Object
show all
Defined in:
lib/norikra/query/ast.rb

Overview

LIB_FUNCTION

Instance Attribute Summary

Attributes inherited from ASTNode

#children, #name

Instance Method Summary collapse

Methods inherited from ASTNode

#child, #find, #initialize, #listup, #to_a

Constructor Details

This class inherits a constructor from Norikra::Query::ASTNode

Instance Method Details

#fields(default_target = nil, known_targets_aliases = []) ⇒ Object 



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# File 'lib/norikra/query/ast.rb', line 201

def fields(default_target=nil, known_targets_aliases=[])
  if @children.size <= 2
    # single function like 'now()', function-name and "("
    []

  elsif @children[1].nodetype?(:prop, :lib, :subquery)
    # first element should be func name if second element is property, library call or subqueries
    self.listup('EVENT_PROP_EXPR').map{|c| c.fields(default_target, known_targets_aliases)}.reduce(&:+) || []

  elsif @children[1].name =~ /^(-)?\d+(\.\d+)$/ || @children[1].name =~ /^'[^']*'$/ || @children[1].name =~ /^"[^"]*"$/
    # first element should be func name if secod element is number/string literal
    self.listup('EVENT_PROP_EXPR').map{|c| c.fields(default_target, known_targets_aliases)}.reduce(&:+) || []

  elsif Norikra::Query.imported_java_class?(@children[0].name)
    # Java imported class name (ex: 'Math.abs(-1)')
    self.listup('EVENT_PROP_EXPR').map{|c| c.fields(default_target, known_targets_aliases)}.reduce(&:+) || []

  else
    # first element may be property
    #  * simple 'fieldname.funcname()'
    #  * fully qualified 'target.fieldname.funcname()'
    #  * simple/fully-qualified container field access 'fieldname.key.$0.funcname()' or 'target.fieldname.$1.funcname()'
    target,fieldname = if @children[0].name.include?('.')
                         parts = @children[0].name.split('.')
                         if known_targets_aliases.include?(parts[0])
                           [ parts[0], parts[1..-1].join(".") ]
                         else
                           [ default_target, @children[0].name ]
                         end
                       else
                         [default_target,@children[0].name]
                       end
    children_list = self.listup('EVENT_PROP_EXPR').map{|c| c.fields(default_target, known_targets_aliases)}.reduce(&:+) || []
    [{:f => fieldname, :t => target}] + children_list
  end
end

#nodetype?(*sym) ⇒ Boolean

“max(size)” => [“LIB_FUNCTION”, “max”, [“EVENT_PROP_EXPR”, [“EVENT_PROP_SIMPLE”, “size”]], “(”]

Returns:

  • (Boolean) 


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# File 'lib/norikra/query/ast.rb', line 197

def nodetype?(*sym)
  sym.include?(:lib) || sym.include?(:libfunc)
end