Interface ExpressionNode

All Known Implementing Classes:
ExpressionBranch, ExpressionDirective, ExpressionFunction
public interface ExpressionNode
A single node in a compiled expression.
Author:
Matthew Tropiano

  • Method Details

    • isCollapsable

      boolean isCollapsable()
      Checks if this node is collapsable.
      Returns:
      true if so, false if not.

    • execute

      boolean execute(ExpressionStack stack, ExpressionVariableContext context)
      Executes this node.
      Parameters:
      stack - the stack to use.
      context - the context for added variables.
      Returns:
      if false, stop expression calculation, else if true, continue.

    • writeBytes

      void writeBytes(OutputStream out) throws IOException
      Write value as bytes (for digest later).
      Parameters:
      out - the output stream.
      Throws:
      IOException - on a write error.