Package weka.knowledgeflow.steps

Class FlowByExpression.ExpressionNode

java.lang.Object
weka.knowledgeflow.steps.FlowByExpression.ExpressionNode
All Implemented Interfaces:
Serializable
Direct Known Subclasses:
FlowByExpression.BracketNode, FlowByExpression.ExpressionClause
Enclosing class:
FlowByExpression
public abstract static class FlowByExpression.ExpressionNode extends Object implements Serializable
Abstract base class for parts of a boolean expression.
Author:
Mark Hall (mhall{[at]}pentaho{[dot]}com)
See Also:

  • Constructor Details

    • ExpressionNode

      public ExpressionNode()

  • Method Details

    • setIsOr

      public void setIsOr(boolean isOr)
      Set whether this node is to be OR'ed to the result so far
      Parameters:
      isOr - true if this node is to be OR'd

    • isOr

      public boolean isOr()
      Get whether this node is to be OR'ed
      Returns:
      true if this node is to be OR'ed with the result so far

    • isNegated

      public boolean isNegated()
      Get whether this node is negated.
      Returns:

    • setNegated

      public void setNegated(boolean negated)
      Set whether this node is negated
      Parameters:
      negated - true if this node is negated

    • setShowAndOr

      public void setShowAndOr(boolean show)
      Set whether to show the combination operator in the textual description
      Parameters:
      show - true if the combination operator is to be shown

    • init

      public void init(Instances structure, Environment env)
      Initialize the node
      Parameters:
      structure - the structure of the incoming instances
      env - Environment variables

    • evaluate

      public abstract boolean evaluate(Instance inst, boolean result)
      Evaluate this node and combine with the result so far
      Parameters:
      inst - the incoming instance to evalute with
      result - the result to combine with
      Returns:
      the result after combining with this node

    • toStringInternal

      public abstract void toStringInternal(StringBuffer buff)
      Get the internal representation of this node
      Parameters:
      buff - the string buffer to append to

    • toStringDisplay

      public abstract void toStringDisplay(StringBuffer buff)
      Get the display representation of this node
      Parameters:
      buff - the string buffer to append to

    • toJTree

      public abstract DefaultMutableTreeNode toJTree(DefaultMutableTreeNode parent)
      Get a DefaultMutableTreeNode for this node
      Parameters:
      parent - the parent of this node (if any)
      Returns:
      the DefaultMutableTreeNode for this node