Class: RbYAML::BaseResolver

Inherits:
Object show all
Defined in:
lib/rbyaml/resolver.rb

Direct Known Subclasses

Resolver

Constant Summary collapse

@@yaml_implicit_resolvers = 
{}
@@yaml_path_resolvers = 
{}

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ BaseResolver

Returns a new instance of BaseResolver.



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# File 'lib/rbyaml/resolver.rb', line 17

def initialize
  @resolver_exact_paths = []
  @resolver_prefix_paths = []
end

Class Method Details

.add_implicit_resolver(tag, regexp, first) ⇒ Object 



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# File 'lib/rbyaml/resolver.rb', line 22

def self.add_implicit_resolver(tag, regexp, first)
  if first.nil?
    first = ""
  end
  first.each_byte { |ch|
    @@yaml_implicit_resolvers[ch] ||= []
    @@yaml_implicit_resolvers[ch] << [tag,regexp]
  }
end

.add_path_resolver(tag, path, kind = nil) ⇒ Object 



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# File 'lib/rbyaml/resolver.rb', line 32

def self.add_path_resolver(tag, path, kind=nil)
  new_path = []
  for element in path
    if element.__is_a
      if element.length == 2
        node_check, index_check = element
      elsif element.length == 1
        node_check = element[0]
        index_check = true
      else
        raise ResolverError.new("Invalid path element: #{element}")
      end
    else
      node_check = nil
      index_check = element
    end
    if String == node_check
      node_check = ScalarNode
    elsif Array == node_check
      node_check = SequenceNode
    elsif Hash == node_check
      node_check = MappingNode
    elsif ![ScalarNode, SequenceNode, MappingNode].include?(node_check) && !node_check.__is_sym && !node_check.nil?
      raise ResolverError.new("Invalid node checker: #{node_check}")
    end
    if !(index_check.__is_str || index_check.__is_int) && !index_check.nil?
      raise ResolverError.new("Invalid index checker: #{index_check}")
    end
    new_path << [node_check, index_check]
  end
  if String == kind
    kind = ScalarNode
  elsif Array == kind
    kind = SequenceNode
  elsif Hash == kind
    kind = MappingNode
  elsif ![ScalarNode, SequenceNode, MappingNode].include?(kind) && !kind.nil?
    raise ResolverError.new("Invalid node kind: #{kind}")
  end
  @@yaml_path_resolvers[[[new_path], kind]] = tag
end

Instance Method Details

#ascend_resolver ⇒ Object 



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# File 'lib/rbyaml/resolver.rb', line 101

def ascend_resolver
  @resolver_exact_paths.pop
  @resolver_prefix_paths.pop
end

#check_resolver_prefix(depth, path, kind, current_node, current_index) ⇒ Object 



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# File 'lib/rbyaml/resolver.rb', line 106

def check_resolver_prefix(depth, path, kind, current_node, current_index)
  node_check, index_check = path[depth-1]
  if node_check.__is_str
    return false if current_node.tag != node_check
  elsif !node_check.nil?
    return false if !node_check === current_node
  end
  return false if index_check==true && !current_index.nil?
  return false if !index_check && current_index.nil?
  if index_check.__is_str
    return false if !(current_index.__is_scalar && index_check == current_index.value)
  elsif index_check.__is_int
    return false if index_check != current_index
  end
  true
end

#descend_resolver(current_node, current_index) ⇒ Object 



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# File 'lib/rbyaml/resolver.rb', line 74

def descend_resolver(current_node, current_index)
  exact_paths = {}
  prefix_paths = []
  if current_node
    depth = @resolver_prefix_paths.length
    for path, kind in @resolver_prefix_paths[-1]
      if check_resolver_prefix(depth, path, kind,current_node, current_index)
        if path.length > depth
          prefix_paths << [path, kind]
        else
          exact_paths[kind] = @@yaml_path_resolvers[[path, kind]]
        end
      end
    end
  else
    for path, kind in @@yaml_path_resolvers
      if !path
        exact_paths[kind] = @@yaml_path_resolvers[[path, kind]]
      else
        prefix_paths << [path, kind]
      end
    end
  end
  @resolver_exact_paths << exact_paths
  @resolver_prefix_paths << prefix_paths
end

#resolve(kind, value, implicit) ⇒ Object 



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# File 'lib/rbyaml/resolver.rb', line 123

def resolve(kind, value, implicit)
  if ScalarNode == kind && implicit[0]
    if value == ""
      resolvers = @@yaml_implicit_resolvers.fetch("",[])
    else
      resolvers = @@yaml_implicit_resolvers.fetch(value[0],[])
    end
    resolvers += @@yaml_implicit_resolvers.fetch(nil,[])
    for tag, regexp in resolvers
      return tag if regexp =~ value
    end
    implicit = implicit[1]
  end
  exact_paths = @resolver_exact_paths[-1]
  return exact_paths[kind] if exact_paths.include?(kind) 
  return exact_paths[nil] if exact_paths.include?(nil)
  if ScalarNode == kind
    return RbYAML::DEFAULT_SCALAR_TAG
  elsif SequenceNode == kind
    return RbYAML::DEFAULT_SEQUENCE_TAG
  elsif MappingNode == kind
    return RbYAML::DEFAULT_MAPPING_TAG
  end
end