Class: Rubyang::Database::DataTree::Node

Inherits:
Object
  • Object
show all
Defined in:
lib/rubyang/database/data_tree.rb

Direct Known Subclasses

Anyxml, InteriorNode, LeafNode, ListNode

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(parent, schema_tree, schema, db_mode, ctx_mode) ⇒ Node

Returns a new instance of Node.



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# File 'lib/rubyang/database/data_tree.rb', line 25

def initialize parent, schema_tree, schema, db_mode, ctx_mode
  @logger = Logger.new(self.class.name)
  @parent = parent
  @schema_tree = schema_tree
  @schema = schema
  @db_mode = db_mode
  @ctx_mode = ctx_mode
  @children = []
end

Instance Attribute Details

#children ⇒ Object (readonly)

Returns the value of attribute children.



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# File 'lib/rubyang/database/data_tree.rb', line 24

def children
  @children
end

#parent ⇒ Object (readonly)

Returns the value of attribute parent.



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# File 'lib/rubyang/database/data_tree.rb', line 24

def parent
  @parent
end

#schema ⇒ Object (readonly)

Returns the value of attribute schema.



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# File 'lib/rubyang/database/data_tree.rb', line 24

def schema
  @schema
end

#schema_tree ⇒ Object (readonly)

Returns the value of attribute schema_tree.



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# File 'lib/rubyang/database/data_tree.rb', line 24

def schema_tree
  @schema_tree
end

Instance Method Details

#evaluate_max_elements ⇒ Object

min-elements start



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# File 'lib/rubyang/database/data_tree.rb', line 158

def evaluate_max_elements
  if @schema.max_elements.size > 0
    @logger.debug { "#{self.class}#evaluate_max_elements: @schema.max_elements.first.arg: #{@schema.max_elements.first.arg}" }
    if @children.size <= @schema.max_elements.first.arg.to_i then true else false end
  else
    true
  end
end

#evaluate_min_elements ⇒ Object

min-elements start



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# File 'lib/rubyang/database/data_tree.rb', line 147

def evaluate_min_elements
  if @schema.min_elements.size > 0
    @logger.debug { "#{self.class}#evaluate_min_elements: @schema.min_elements.first.arg: #{@schema.min_elements.first.arg}" }
    if @children.size >= @schema.min_elements.first.arg.to_i then true else false end
  else
    true
  end
end

#evaluate_musts ⇒ Object

must start



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# File 'lib/rubyang/database/data_tree.rb', line 129

def evaluate_musts
  @schema.musts.inject( Rubyang::Xpath::BasicType::Boolean.new true ){ |r, w|
    @logger.debug { 'evaluate musts:' }
    @logger.debug { 'r:' }
    @logger.debug { r.value }
    @logger.debug { 'w:' }
    @logger.debug { w.arg }
    must = r.and self.evaluate_xpath( w.xpath, self )
    @logger.debug { 'must:' }
    require 'yaml'
    @logger.debug { must.to_yaml }
    @logger.debug { 'evaluate musts done' }
    r.and self.evaluate_xpath( w.xpath, self )
  }
end

#evaluate_whens ⇒ Object

when start



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# File 'lib/rubyang/database/data_tree.rb', line 112

def evaluate_whens
  @schema.whens.inject( Rubyang::Xpath::BasicType::Boolean.new true ){ |r, w|
    @logger.debug { 'evaluate whens:' }
    @logger.debug { 'r:' }
    @logger.debug { r.value }
    @logger.debug { 'w:' }
    @logger.debug { w.arg }
    _when = r.and self.evaluate_xpath( w.xpath, self )
    @logger.debug { '_when:' }
    @logger.debug { _when.to_yaml }
    @logger.debug { 'evaluate whens done' }
    r.and self.evaluate_xpath( w.xpath, self )
  }
end

#evaluate_xpath(xpath, current = self) ⇒ Object

end



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# File 'lib/rubyang/database/data_tree.rb', line 168

def evaluate_xpath xpath, current=self
  @logger.debug { 'in evaluate_xpath:' }
  @logger.debug { 'xpath:' }
  @logger.debug { xpath.to_yaml }
  @logger.debug { 'self:' }
  @logger.debug { self.class }
  @logger.debug { self.schema.arg }
  @logger.debug { self.schema.value rescue '' }
  @logger.debug { 'current:' }
  @logger.debug { current.class }
  @logger.debug { current.schema.arg }
  @logger.debug { current.schema.value rescue '' }
  evaluate_xpath_expr xpath, current
end

#evaluate_xpath_axis(location_step, current) ⇒ Object 



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# File 'lib/rubyang/database/data_tree.rb', line 219

def evaluate_xpath_axis location_step, current
  @logger.debug { 'in evaluate_xpath_axis:' }
  @logger.debug { 'location_step:' }
  @logger.debug { location_step.to_yaml }
  @logger.debug { 'self:' }
  @logger.debug { self.class }
  @logger.debug { self.schema.arg }
  @logger.debug { self.schema.value rescue '' }
  @logger.debug { 'current:' }
  @logger.debug { current.class }
  @logger.debug { current.schema.arg }
  @logger.debug { current.schema.value rescue '' }
  case location_step.axis.name
  when Rubyang::Xpath::Axis::SELF
    Rubyang::Xpath::BasicType::NodeSet.new [self]
  when Rubyang::Xpath::Axis::PARENT
    Rubyang::Xpath::BasicType::NodeSet.new [@parent]
  when Rubyang::Xpath::Axis::CHILD
    Rubyang::Xpath::BasicType::NodeSet.new @children.inject([]){ |cs, c|
      cs + case c
      when Rubyang::Database::DataTree::ListElement
        c.children
      else
        [c]
      end
    }
  else
    raise "location_step.axis.name: #{location_step.axis.name} NOT implemented"
  end
end

#evaluate_xpath_expr(expr, current = self) ⇒ Object 



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# File 'lib/rubyang/database/data_tree.rb', line 312

def evaluate_xpath_expr expr, current=self
  case expr
  when Rubyang::Xpath::Expr
    @logger.debug { "in Expr" }
    @logger.debug { "op: #{expr.op}" }
    op = expr.op
    op_result = self.evaluate_xpath_expr( op, current )
  when Rubyang::Xpath::OrExpr
    @logger.debug { "in OrExpr" }
    @logger.debug { "op1: #{expr.op1}" }
    @logger.debug { "op2: #{expr.op2}" }
    op1 = expr.op1
    op2 = expr.op2
    op1_result = self.evaluate_xpath_expr( op1, current )
    if op2 == nil
      op1_result
    else
      op2_result = self.evaluate_xpath_expr( op2, current )
      if op1_result.class == Rubyang::Xpath::BasicType::NodeSet && op2_result.class == Rubyang::Xpath::BasicType::NodeSet
        if op1_result.empty? && op2_result.empty?
          Rubyang::Xpath::BasicType::Boolean.new false
        else
          Rubyang::Xpath::BasicType::Boolean.new true
        end
      else
        Rubyang::Xpath::BasicType::Boolean.new true
      end
    end
  when Rubyang::Xpath::AndExpr
    @logger.debug { "in AndExpr" }
    @logger.debug { "op1: #{expr.op1}" }
    @logger.debug { "op2: #{expr.op2}" }
    op1 = expr.op1
    op2 = expr.op2
    op1_result = self.evaluate_xpath_expr( op1, current )
    if op2 == nil
      op1_result
    else
      op2_result = self.evaluate_xpath_expr( op2, current )
      if op1_result.class == Rubyang::Xpath::BasicType::NodeSet
        Rubyang::Xpath::BasicType::Boolean.new false if op1_result.empty?
      elsif op2_result.class == Rubyang::Xpath::BasicType::NodeSet
        Rubyang::Xpath::BasicType::Boolean.new false if op2_result.empty?
      else
        Rubyang::Xpath::BasicType::Boolean.new true
      end
    end
  when Rubyang::Xpath::EqualityExpr
    @logger.debug { "in EqualityExpr" }
    @logger.debug { "op1: #{expr.op1}" }
    @logger.debug { "op2: #{expr.op2}" }
    @logger.debug { "operator: #{expr.operator}" }
    op1 = expr.op1
    op2 = expr.op2
    operator = expr.operator
    op1_result = self.evaluate_xpath_expr( op1, current )
    if op2 == nil
      op1_result
    else
      op2_result = self.evaluate_xpath_expr( op2, current )
      @logger.debug { "in EqualityExpr else:" }
      @logger.debug { "op1_result: #{op1_result.to_yaml}" }
      @logger.debug { "op2_result: #{op2_result.to_yaml}" }
      if op1_result.class == Rubyang::Xpath::BasicType::NodeSet && op2_result.class == Rubyang::Xpath::BasicType::String
        case operator
        when /^\=$/
          #op1_result.select{ |a| op2_result.map{ |b| b.value }.include? a.value }.map{ |c| c.parent }
          op1_result == op2_result
        when /^\!\=$/
          raise "Equality Expr: '!=' not implemented"
        else
          raise "Equality Expr: other than '=' and '!=' not implemented"
        end
      elsif op1_result.class == Rubyang::Xpath::BasicType::String && op2_result.class == Rubyang::Xpath::BasicType::NodeSet
        case operator
        when /^\=$/
          op2_result.select{ |a| op1_result.map{ |b| b.value }.include? a.value }.map{ |c| c.parent }
        when /^\!\=$/
          raise "Equality Expr: '!=' not implemented"
        else
          raise "Equality Expr: other than '=' and '!=' not implemented"
        end
      elsif op1_result.class == Rubyang::Xpath::BasicType::Number && op2_result.class == Rubyang::Xpath::BasicType::Number
        case operator
        when /^\=$/
          op1_result == op2_result
        when /^\!\=$/
          op1_result != op2_result
        else
          raise "Equality Expr: other than '=' and '!=' not implemented"
        end
      elsif op1_result.class == Rubyang::Xpath::BasicType::String && op2_result.class == Rubyang::Xpath::BasicType::String
        case operator
        when /^\=$/
          op1_result == op2_result
        when /^\!\=$/
          op1_result != op2_result
        else
          raise "Equality Expr: other than '=' and '!=' not implemented"
        end
      elsif op1_result.class == Rubyang::Xpath::BasicType::NodeSet && op2_result.class == Rubyang::Xpath::BasicType::NodeSet
        case operator
        when /^\=$/
          op1_result == op2_result
        when /^\!\=$/
          op1_result != op2_result
        else
          raise "Equality Expr: other than '=' and '!=' not implemented"
        end
      else
        Rubyang::Xpath::BasicType::Boolean.new false
      end
    end
  when Rubyang::Xpath::RelationalExpr
    @logger.debug { "in RelationalExpr" }
    @logger.debug { "op1: #{expr.op1}" }
    @logger.debug { "op2: #{expr.op2}" }
    @logger.debug { "operator: #{expr.operator}" }
    op1 = expr.op1
    op2 = expr.op2
    operator = expr.operator
    op1_result = self.evaluate_xpath_expr( op1, current )
    if op2 == nil
      op1_result
    else
      op2_result = self.evaluate_xpath_expr( op2, current )
      if op1_result.class == Rubyang::Xpath::BasicType::Number && op2_result.class == Rubyang::Xpath::BasicType::Number
        case operator
        when /^\>$/
          op1_result > op2_result
        when /^\<$/
          op1_result < op2_result
        when /^\>\=$/
          op1_result >= op2_result
        when /^\<\=$/
          op1_result <= op2_result
        else
          raise "Relational Expr: other than '>', '<', '>=' and '<=' not valid"
        end
      else
        Rubyang::Xpath::BasicType::Boolean.new false
      end
    end
  when Rubyang::Xpath::AdditiveExpr
    @logger.debug { "in AdditiveExpr" }
    @logger.debug { "op1: #{expr.op1}" }
    @logger.debug { "op2: #{expr.op2}" }
    @logger.debug { "operator: #{expr.operator}" }
    op1 = expr.op1
    op2 = expr.op2
    operator = expr.operator
    op1_result = self.evaluate_xpath_expr( op1, current )
    if op2 == nil
      op1_result
    else
      op2_result = self.evaluate_xpath_expr( op2, current )
      if op1_result.class == Rubyang::Xpath::BasicType::Number && op2_result.class == Rubyang::Xpath::BasicType::Number
        case operator
        when /^\+$/
          op1_result + op2_result
        when /^\-$/
          op1_result - op2_result
        else
          raise "Additive Expr: other than '+' and '-' not valid"
        end
      else
        Rubyang::Xpath::BasicType::Number.new Float::NAN
      end
    end
  when Rubyang::Xpath::MultiplicativeExpr
    @logger.debug { "in MultiplicativeExpr" }
    @logger.debug { "op1: #{expr.op1}" }
    @logger.debug { "op2: #{expr.op2}" }
    @logger.debug { "operator: #{expr.operator}" }
    op1 = expr.op1
    op2 = expr.op2
    operator = expr.operator
    op1_result = self.evaluate_xpath_expr( op1, current )
    if op2 == nil
      op1_result
    else
      op2_result = self.evaluate_xpath_expr( op2, current )
      if op1_result.class == Rubyang::Xpath::BasicType::Number && op2_result.class == Rubyang::Xpath::BasicType::Number
        case operator
        when /^\*$/
          op1_result * op2_result
        when /^\/$/
          op1_result / op2_result
        else
          raise "Multiplicative Expr: other than '*' and '/' not valid"
        end
      else
        Rubyang::Xpath::BasicType::Number.new Float::NAN
      end
    end
  when Rubyang::Xpath::UnaryExpr
    @logger.debug { "in UnaryExpr" }
    @logger.debug { "op1: #{expr.op1}" }
    @logger.debug { "operator: #{expr.operator}" }
    op1 = expr.op1
    operator = expr.operator
    op1_result = self.evaluate_xpath_expr( op1, current )
    case operator
    when nil
      op1_result
    when /^\-$/
      case op1_result
      when Rubyang::Xpath::BasicType::Number
        - op1_result
      else
        Rubyang::Xpath::BasicType::Number.new Float::NAN
      end
    else
      raise "Unary Expr: other than '-' not valid"
    end
  when Rubyang::Xpath::UnionExpr
    @logger.debug { "in UnionExpr" }
    @logger.debug { "op1: #{expr.op1}" }
    @logger.debug { "op2: #{expr.op2}" }
    @logger.debug { "operator: #{expr.operator}" }
    op1 = expr.op1
    op2 = expr.op2
    operator = expr.operator
    op1_result = self.evaluate_xpath_expr( op1, current )
    if op2 == nil
      op1_result
    else
      op2_result = self.evaluate_xpath_expr( op2, current )
      case operator
      when /^\|$/
        raise "Union Expr: '|' not implemented"
      else
        raise "Union Expr: other than '|' not implemented"
      end
    end
  when Rubyang::Xpath::PathExpr
    @logger.debug { "in PathExpr" }
    @logger.debug { "op1: #{expr.op1}" }
    @logger.debug { "op2: #{expr.op2}" }
    @logger.debug { "operator: #{expr.operator}" }
    op1 = expr.op1
    op2 = expr.op2
    operator = expr.operator
    op1_result = case op1
                 when Rubyang::Xpath::LocationPath
                   self.evaluate_xpath_path( op1, current )
                 when Rubyang::Xpath::FilterExpr
                   op1_result = self.evaluate_xpath_expr( op1, current )
                 else
                   raise "PathExpr: #{op1} not supported"
                 end
    if op2 == nil
      op1_result
    else
      case operator
      when /^\/$/
        case op1_result
        when Rubyang::Database::DataTree::Node
          op1_result.evaluate_xpath_path op2, current
        when Rubyang::Xpath::LocationPath
          self.evaluate_xpath_path Rubyang::Xpath::LocationPath.new( *(op1_result.location_step_sequence + op2.location_step_sequence) ), current
        else
          raise
        end
      when /^\/\/$/
        raise "Path Expr: '//' not implemented"
      else
        raise "Path Expr: other than '/' and '//' not valid"
      end
    end
  when Rubyang::Xpath::FilterExpr
    @logger.debug { "in FilterExpr" }
    @logger.debug { "op1: #{expr.op1}" }
    @logger.debug { "op2: #{expr.op2}" }
    op1 = expr.op1
    op2 = expr.op2
    op1_result = self.evaluate_xpath_expr( op1, current )
    if op2 == nil
      op1_result
    else
      op2_result = self.evaluate_xpath_expr( op2.expr, current )
      Rubyang::Xpath::BasicType::NodeSet.new
    end
  when Rubyang::Xpath::PrimaryExpr
    @logger.debug { "in PrimaryExpr" }
    @logger.debug { "op1: #{expr.op1}" }
    op1 = expr.op1
    case op1
    when Rubyang::Xpath::VariableReference
      raise "Primary Expr: '#{op1}' not implemented"
    when Rubyang::Xpath::Expr
      op1_result = self.evaluate_xpath_expr( op1, current )
    when Rubyang::Xpath::Literal
      Rubyang::Xpath::BasicType::String.new op1.value
    when Rubyang::Xpath::Number
      Rubyang::Xpath::BasicType::Number.new op1.value
    when Rubyang::Xpath::FunctionCall
      op1_result = self.evaluate_xpath_expr( op1, current )
    else
      raise "Primary Expr: '#{op1}' not valid"
    end
  when Rubyang::Xpath::FunctionCall
    @logger.debug { "in FunctionCall" }
    @logger.debug { "name: #{expr.name}" }
    @logger.debug { "args: #{expr.args}" }
    name = expr.name
    case name
    when Rubyang::Xpath::FunctionCall::CURRENT
      current
    else
      raise "FunctionCall: #{name} not implemented"
    end
  else
    raise "Unrecognized Expr: #{expr}"
  end
end

#evaluate_xpath_node_test(location_step, current) ⇒ Object 



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# File 'lib/rubyang/database/data_tree.rb', line 250

def evaluate_xpath_node_test location_step, current
  @logger.debug { 'in node_test' }
  @logger.debug { self.class }
  @logger.debug { self.schema.arg }
  @logger.debug { self.value rescue '' }
  case location_step.node_test.node_test_type
  when Rubyang::Xpath::NodeTest::NodeTestType::NAME_TEST
    if "/" == location_step.node_test.node_test
      [self.root]
    elsif self.schema.model.arg == location_step.node_test.node_test
      case self
      when Rubyang::Database::DataTree::List
        self.children
      else
        [self]
      end
    else
      []
    end
  when Rubyang::Xpath::NodeTest::NodeTestType::NODE_TYPE
    case location_step.node_test.node_test
    when Rubyang::Xpath::NodeTest::NodeType::COMMENT
      raise "node-type: comment is not implemented"
    when Rubyang::Xpath::NodeTest::NodeType::TEXT
      raise "node-type: text is not implemented"
    when Rubyang::Xpath::NodeTest::NodeType::NODE
      [self]
    else
      raise "node-type not match to comment or text or node"
    end
  when Rubyang::Xpath::NodeTest::NodeTestType::PROCESSING_INSTRUCTION
    raise "processing-instruction is not implemented"
  else
    raise ""
  end
end

#evaluate_xpath_path(location_path, current) ⇒ Object 



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# File 'lib/rubyang/database/data_tree.rb', line 183

def evaluate_xpath_path location_path, current
  @logger.debug { 'in evaluate_xpath_path:' }
  @logger.debug { 'location_path:' }
  @logger.debug { location_path.to_yaml }
  @logger.debug { 'self:' }
  @logger.debug { self.class }
  @logger.debug { self.schema.arg }
  @logger.debug { self.schema.value rescue '' }
  @logger.debug { 'current:' }
  @logger.debug { current.class }
  @logger.debug { current.schema.arg }
  @logger.debug { current.schema.value rescue '' }
  first_location_step = location_path.location_step_sequence.first
  @logger.debug { 'first_location_step:' }
  @logger.debug { first_location_step.to_yaml }
  candidates_by_axis = self.evaluate_xpath_axis( first_location_step, current )
  @logger.debug { 'candidates_by_axis:' }
  @logger.debug { candidates_by_axis.to_yaml }
  candidates_by_node_test = Rubyang::Xpath::BasicType::NodeSet.new candidates_by_axis.value.inject([]){ |cs, c| cs + c.evaluate_xpath_node_test( first_location_step, current ) }
  @logger.debug { 'candidates_by_node_test:' }
  @logger.debug { candidates_by_node_test.to_yaml }
  candidates_by_predicates = Rubyang::Xpath::BasicType::NodeSet.new candidates_by_node_test.value.inject([]){ |cs, c| cs + c.evaluate_xpath_predicates( first_location_step, current ) }
  @logger.debug { 'candidates_by_predicates:' }
  @logger.debug { candidates_by_predicates.to_yaml }
  if location_path.location_step_sequence[1..-1].size == 0
    candidates_by_predicates
  else
    Rubyang::Xpath::BasicType::NodeSet.new candidates_by_predicates.value.inject([]){ |cs, c|
      following_location_path = Rubyang::Xpath::LocationPath.new *(location_path.location_step_sequence[1..-1])
      @logger.debug { 'following_location_path:' }
      @logger.debug { following_location_path.to_yaml }
      cs + c.evaluate_xpath_path( following_location_path, current ).value
    }
  end
end

#evaluate_xpath_predicates(location_step, current) ⇒ Object 



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# File 'lib/rubyang/database/data_tree.rb', line 287

def evaluate_xpath_predicates location_step, current
  case location_step.predicates.size
  when 0
    [self]
  else
    location_step.predicates.inject([self]){ |cs, predicate|
      if cs.size > 0
        result = cs[0].evaluate_xpath_expr predicate.expr, current
        case result
        when Rubyang::Xpath::BasicType::NodeSet
          raise
        when Rubyang::Xpath::BasicType::Boolean
          if result.value == true then cs else [] end
        when Rubyang::Xpath::BasicType::Number
          raise
        when Rubyang::Xpath::BasicType::String
          raise
        end
      else
        []
      end
    }
  end
end

#load_merge_xml_recursive(doc_xml) ⇒ Object 



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# File 'lib/rubyang/database/data_tree.rb', line 85

def load_merge_xml_recursive doc_xml
  doc_xml.each_element{ |e|
    child = edit( e.name )
    unless e.has_elements?
      if e.has_text?
        classes_have_set = [
          Rubyang::Database::DataTree::Leaf,
          Rubyang::Database::DataTree::LeafList,
        ]
        if classes_have_set.include?(child.class)
          child.set e.text
        end
      end
    end
    child.load_merge_xml_recursive e
  }
end

#root ⇒ Object 



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# File 'lib/rubyang/database/data_tree.rb', line 102

def root
  case @parent
  when Rubyang::Database::DataTree::Root
    @parent
  else
    @parent.root
  end
end

#to_json(pretty: false) ⇒ Object 



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# File 'lib/rubyang/database/data_tree.rb', line 57

def to_json pretty: false
  hash = Hash.new
  self.to_json_recursive hash
  if pretty
    JSON.pretty_generate( hash )
  else
    JSON.generate( hash )
  end
end

#to_s(parent = true) ⇒ Object 



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# File 'lib/rubyang/database/data_tree.rb', line 34

def to_s parent=true
  head, vars, tail = "#<#{self.class.to_s}:0x#{(self.object_id << 1).to_s(16).rjust(14,'0')} ", Array.new, ">"
  if parent
    vars.push "@parent=#{@parent.to_s(false)}"
    vars.push "@schema_tree=#{@schema_tree.to_s(false)}"
    vars.push "@schema=#{@schema.to_s(true)}"
    vars.push "@children=#{@children.to_s}"
  end
  head + vars.join(', ') + tail
end

#to_xml(pretty: false) ⇒ Object 



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# File 'lib/rubyang/database/data_tree.rb', line 44

def to_xml pretty: false
  doc = REXML::Document.new
  self.to_xml_recursive doc, ''
  if pretty
    pretty_formatter = REXML::Formatters::Pretty.new( 2 )
    pretty_formatter.compact = true
    output = ''
    pretty_formatter.write( doc, output )
    output
  else
    doc.to_s
  end
end

#valid?(current = true) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubyang/database/data_tree.rb', line 66

def valid? current=true
  result = if current
             self.root.valid?
           else
             case self
             when Rubyang::Database::DataTree::Container
               @children.inject(self.evaluate_musts){ |r, c|
                 r.and c.valid?( false )
               }
             when Rubyang::Database::DataTree::LeafList, Rubyang::Database::DataTree::List
               tmp = Rubyang::Xpath::BasicType::Boolean.new( self.evaluate_min_elements )
               tmp.and Rubyang::Xpath::BasicType::Boolean.new( self.evaluate_max_elements )
             else
               Rubyang::Xpath::BasicType::Boolean.new true
             end
           end
  @logger.debug { "#{self.class}#valid?: return: #{result} #{result.value}" }
  result
end