Package com.randomnoun.common.jexl.visitor

Class TreeDumper

java.lang.Object
com.randomnoun.common.jexl.visitor.DepthFirstVisitor
com.randomnoun.common.jexl.visitor.TreeDumper
All Implemented Interfaces:
Visitor
public class TreeDumper extends DepthFirstVisitor
Dumps the syntax tree to a Writer using the location information in each NodeToken.

  • Field Details

  • Constructor Details

    • TreeDumper

      public TreeDumper()
      The default constructor uses System.out as its output location. You may specify your own Writer or OutputStream using one of the other constructors.

    • TreeDumper

      public TreeDumper(Writer o)

    • TreeDumper

      public TreeDumper(OutputStream o)

  • Method Details

    • flushWriter

      public void flushWriter()
      Flushes the OutputStream or Writer that this TreeDumper is using.

    • printSpecials

      public void printSpecials(boolean b)
      Allows you to specify whether or not to print special tokens.

    • startAtNextToken

      public void startAtNextToken()
      Starts the tree dumper on the line containing the next token visited. For example, if the next token begins on line 50 and the dumper is currently on line 1 of the file, it will set its current line to 50 and continue printing from there, as opposed to printing 49 blank lines and then printing the token.

    • resetPosition

      public void resetPosition()
      Resets the position of the output "cursor" to the first line and column. When using a dumper on a syntax tree more than once, you either need to call this method or startAtNextToken() between each dump.

    • visit

      public void visit(NodeToken n)
      Dumps the current NodeToken to the output stream being used.
      Specified by:
      visit in interface Visitor
      Overrides:
      visit in class DepthFirstVisitor
      Throws:
      IllegalStateException - if the token position is invalid relative to the current position, i.e. its location places it before the previous token.