Package net.sourceforge.pmd.lang.ast

Class AstVisitorBase<P,R>

java.lang.Object
net.sourceforge.pmd.lang.ast.AstVisitorBase<P,R>
All Implemented Interfaces:
AstVisitor<P,R>
public abstract class AstVisitorBase<P,R> extends Object implements AstVisitor<P,R>
Base implementation of AstVisitor, that performs a top-down (preorder) visit and may accumulate a result.

Note that if you care about the result (<R>), then you need to override visitChildren to implement the logic that combines values from children, if any.

  • Constructor Details

    • AstVisitorBase

      public AstVisitorBase()

  • Method Details

    • visitChildren

      protected R visitChildren(Node node, P data)
      Visit the children. By default the data parameter is passed unchanged to all descendants, and null is returned. Override this method to customize this behavior.
      Parameters:
      node - Node whose children should be visited
      data - Parameter of the visit
      Returns:
      Some value for the children

    • visitNode

      public R visitNode(Node node, P param)
      Description copied from interface: AstVisitor
      Visit a node. This method is dispatched statically, you should use Node.acceptVisitor(AstVisitor, Object) if you want to call the most specific method instead.
      Specified by:
      visitNode in interface AstVisitor<P,R>
      Parameters:
      node - Node to visit
      param - Parameter
      Returns:
      Some result