fido.util
Interface BooleanTreeNode

All Known Subinterfaces:

Expression

All Known Implementing Classes:

AlwaysExpression, AttributeBooleanNode, BooleanNode, EmptyBooleanNode, NodeExpression, PrepositionBooleanNode

public interface BooleanTreeNode

This is a simple interface that is the root of the two node types: BooleanNode and any Object as a leaf node.

This interface has no methods or fields. The BooleanTree uses this to pull any node type from the tree. Node types can subsequently be realized by if (node instanceof BooleanNode).