DecisionTreeInterface.java

package TreePackage;
public interface DecisionTreeInterface<T> extends BinaryTreeInterface<T>
{
    /**
     * Gets the data in the current node
     * @return The data object in the current node, or null if node is empty
     */
    T getCurrentData();

    /**
     * Sets the data in the current node
     * @param newData The new data object
     */
    void setCurrentData(T newData);

    /**
     * Sets the data in the children of the current node, creating them if they do not exist
     * @param responseForNo The new data object for the left child
     * @param responseForYes The new data object for the right child
     */
    void setResponses(T responseForNo, T responseForYes);

    /**
     * Sees whether the current node contains an answer
     * @return True if the current node is a leaf, false otherwise
     */
    boolean isAnswer();

    /**
     * Sets the current node to its left child, or null if the child doesn't exist
     */
    void advanceToNo();

    /**
     * Sets the current node to its right child, or null if the child doesn't exist
     */
    void advanceToYes();

    /** Sets the current node to the root of the tree. */
    void resetCurrentNode();
}