| commit | author | age | ||
| a18bfa | 1 | package cn.autoform.web.formula.tool; |
| Z | 2 | |
| 3 | import java.util.Map; | |
| 4 | ||
| 5 | import com.googlecode.aviator.AviatorEvaluator; | |
| 6 | ||
| 7 | import cn.autoform.web.formula.tool.function.Avg; | |
| 8 | import cn.autoform.web.formula.tool.function.Sum; | |
| 9 | ||
| 10 | public class AviatorTool { | |
| 11 | ||
| 12 | static{ | |
| 13 | // 子表单 聚合函数 总和 | |
| 14 | AviatorEvaluator.addFunction(new Sum()); | |
| 15 | // 子表单 聚合函数 平均值 | |
| 16 | AviatorEvaluator.addFunction(new Avg()); | |
| 17 | } | |
| 18 | ||
| 19 | public static <T> T execute(String expression, Map<String, Object> env, Class<T> clazz){ | |
| 20 | return execute(expression, env, clazz, null); | |
| 21 | } | |
| 22 | ||
| 23 | @SuppressWarnings("unchecked") | |
| 24 | public static <T> T execute(String expression, Map<String, Object> env, Class<T> clazz, CallBack<T> call){ | |
| 25 | try{ | |
| 26 | return (T) AviatorEvaluator.compile(expression).execute(env); | |
| 27 | }catch (Exception e) { | |
| 28 | if(call != null) | |
| 29 | return call.error(e); | |
| 30 | return null; | |
| 31 | } | |
| 32 | } | |
| 33 | ||
| 34 | @FunctionalInterface | |
| 35 | public static interface CallBack<T>{ | |
| 36 | ||
| 37 | T error(Exception e); | |
| 38 | ||
| 39 | } | |
| 40 | ||
| 41 | } | |
