Class: CallbackTreeNodeVisitor2

Inherits:
TreeNodeVisitor show all
Defined in:
lib/tree_visitor/tree_node_visitor.rb

Overview

CallbackTreeNodeVisitor

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(root = nil) ⇒ CallbackTreeNodeVisitor2

Returns a new instance of CallbackTreeNodeVisitor2.



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# File 'lib/tree_visitor/tree_node_visitor.rb', line 215

def initialize( root = nil )
  super()
  @stack = []
  @root = root
  @stack.push( root ) if root
end

Instance Attribute Details

#root ⇒ Object (readonly)

Returns the value of attribute root.



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# File 'lib/tree_visitor/tree_node_visitor.rb', line 213

def root
  @root
end

Instance Method Details

#enter_treeNode(treeNode) ⇒ Object 



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# File 'lib/tree_visitor/tree_node_visitor.rb', line 230

def enter_treeNode( treeNode )
  newParentNode = if @stack.empty? 
                    nil
                  else
                    @stack.last
                  end
  newTreeNode = @action_enterTreeNode.call( treeNode, newParentNode )
  @root = newTreeNode if @stack.empty?
  @stack.push( newTreeNode ) 
end

#exit_treeNode(treeNode) ⇒ Object 



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# File 'lib/tree_visitor/tree_node_visitor.rb', line 241

def exit_treeNode( treeNode )
  @stack.pop
end

#onEnterTreeNode(&action) ⇒ Object 



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# File 'lib/tree_visitor/tree_node_visitor.rb', line 222

def onEnterTreeNode( &action )
  @action_enterTreeNode = action
end

#onVisitLeafNode(&action) ⇒ Object 



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# File 'lib/tree_visitor/tree_node_visitor.rb', line 226

def onVisitLeafNode( &action )
  @action_visitLeafNode = action
end

#visit_leafNode(leafNode) ⇒ Object 



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# File 'lib/tree_visitor/tree_node_visitor.rb', line 245

def visit_leafNode( leafNode )
  newParentNode = @stack.last
  @action_visitLeafNode.call( leafNode, newParentNode )
end