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A simple and intuitive rules abstraction for Java

There is a newer version: 0.12

package com.deliveredtechnologies.rulebook.model;

import com.deliveredtechnologies.rulebook.NameValueReferableMap;
import com.deliveredtechnologies.rulebook.Result;

import java.util.Optional;

/**
 * Created by clong on 9/3/17.
 */
public class RuleBookAuditor extends Auditor implements RuleBook {
  private RuleBook _ruleBook;

  public RuleBookAuditor(RuleBook ruleBook) {
    _ruleBook = ruleBook;
  }

  @Override
  public void addRule(Rule rule) {
    if (rule instanceof Auditable) {
      Auditable auditableRule = (Auditable)rule;
      registerRule(auditableRule);
      auditableRule.setAuditor(this);
    }
    _ruleBook.addRule(rule);
  }

  @Override
  public void run(NameValueReferableMap facts) {
    if (!hasRules()) {
      defineRules();
    }
    _ruleBook.run(facts);
  }

  @Override
  public void setDefaultResult(T result) {
    _ruleBook.setDefaultResult(result);
  }

  @Override
  public Optional> getResult() {
    return _ruleBook.getResult();
  }

  @Override
  public boolean hasRules() {
    return _ruleBook.hasRules();
  }
}