动态条件实现java

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json数据格式

[{"name": "规则1","action": {"with": [{"type": "SHOW","targets": ["xd_hh_158444776217"]},{"type": "HIDE","targets": ["xd_hh_158772314112"]}],"other": [{"type": "HIDE","targets": ["xd_hh_158444776217"]},{"type": "SHOW","targets": ["xd_hh_158772314112"]}]},"condition": {"groupMode": true,"conditionList": [{"mode": true,"conditionList": [{"key": "xd_hh_162172344044","value": [{"key": "16","value": "16"}],"expression": "in"}]}]}}
]

java解析

  public Set<String> getRuleHideShowList(String rule,Map<String, Object> variables,Boolean returnHide)throws ErrorResponseException {Set<String> showIds = new HashSet<>();Set<String> hideIds = new HashSet<>();if(StrUtil.isNotBlank(rule)){List<FormRuleDto> formRuleDtoList = CommonUtil.toArray(rule, FormRuleDto.class);// 遍历每个规则for (FormRuleDto formRuleDto : formRuleDtoList) {Boolean with=null;FormRuleConditionDto formRuleConditionDto=formRuleDto.getCondition();for (FormRuleConditionItemDto formRuleConditionItemDto : formRuleConditionDto.getConditionList()) {Boolean getConditionListExpressionValue=null;for (FormRuleConditionItemItemDto formRuleConditionItemItemDto : formRuleConditionItemDto.getConditionList()) {boolean expressionValue=false;String key = formRuleConditionItemItemDto.getKey();Object value = formRuleConditionItemItemDto.getValue();String expression = formRuleConditionItemItemDto.getExpression();if(Objects.equals(expression, "in")){Object keyValue =variables.get(key);expressionValue=Objects.equals(value,keyValue);}else if(Objects.equals(expression, "notin"))
            { Object keyValue =variables.get(key); 
             expressionValue=!Objects.equals(value,keyValue); 
          }else{log.error("该动态表单表达式暂未支持，请联系管理员：{}", new Gson().toJson(rule));ErrorResponseException exception = new ErrorResponseException(HttpStatus.NOT_FOUND);exception.setDetail("该动态表单表达式暂未支持，请联系管理员：" + expression);throw exception;}//且if(formRuleConditionItemDto.getMode()){if(getConditionListExpressionValue==null){getConditionListExpressionValue=expressionValue;}else{getConditionListExpressionValue=getConditionListExpressionValue && expressionValue;}}else{//或if(getConditionListExpressionValue==null){getConditionListExpressionValue=expressionValue;}else{getConditionListExpressionValue=getConditionListExpressionValue || expressionValue;}}}//且if(formRuleConditionDto.getGroupMode()){if(with==null){with=getConditionListExpressionValue;}else{with=with && getConditionListExpressionValue;}}else{//或if(with==null){with=getConditionListExpressionValue;}else{with=with || getConditionListExpressionValue;}}}// 获取所有action子节点FormRuleActionDto action=formRuleDto.getAction();if(with!=null && action!=null){if(with){List<FormRuleActionItemDto> actionWith=  action.getWith();for (FormRuleActionItemDto actionItemDto : actionWith) {if(Objects.equals(actionItemDto.getType(), "SHOW")){showIds.addAll(actionItemDto.getTargets());}if(Objects.equals(actionItemDto.getType(), "HIDE")){hideIds.addAll(actionItemDto.getTargets());}}}else{List<FormRuleActionItemDto> actionOther=  action.getOther();for (FormRuleActionItemDto actionItemDto : actionOther) {if(Objects.equals(actionItemDto.getType(), "SHOW")){showIds.addAll(actionItemDto.getTargets());}if(Objects.equals(actionItemDto.getType(), "HIDE")){hideIds.addAll(actionItemDto.getTargets());}}}}}}if(returnHide){return hideIds;}else{return showIds;}}

支撑pdo

import lombok.Data;@Data
public class FormRuleDto {String name;FormRuleActionDto action;FormRuleConditionDto condition;
}import lombok.Data;@Data
public class FormRuleConditionItemItemDto {String key;Object value;String expression;}
import java.util.List;
import lombok.Data;@Data
public class FormRuleConditionItemDto {Boolean mode;List<FormRuleConditionItemItemDto> conditionList;}
import java.util.List;
import lombok.Data;@Data
public class FormRuleConditionDto {Boolean groupMode;List<FormRuleConditionItemDto> conditionList;}
import java.util.List;
import lombok.Data;@Data
public class FormRuleActionItemDto {//  SHOW HIDE
  String type;List<String> targets;}
import java.util.List;
import lombok.Data;@Data
public class FormRuleActionDto {List<FormRuleActionItemDto> with;List<FormRuleActionItemDto> other;}import cn.hutool.core.util.StrUtil;
import com.alibaba.fastjson2.JSON;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.xd.flow.engine.bo.flow.NodeUser;
import lombok.SneakyThrows;import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;
public class CommonUtil {/*** 1-26* 数字转大写英文字符** @param num* @return*/public static String numberToLetter(int num) {if (num <= 0) {return null;}String letter = "";num--;do {if (letter.length() > 0) {num--;}letter = ((char) (num % 26 + (int) 'A')) + letter;num = (int) ((num - num % 26) / 26);} while (num > 0);return letter;}@SneakyThrowspublic static <T> List<T> toArray(String json, Class<T> tClass) {Type type = TypeToken.getParameterized(ArrayList.class, tClass).getType();return new Gson().fromJson(json, type);
//    return JSON.parseArray(json, tClass);
  }@SneakyThrowspublic static <T> T toObj(String json, Class<T> tClass) {if (StrUtil.isBlank(json)) {return null;}return new Gson().fromJson(json, tClass);}@SneakyThrowspublic static String toJson(Object obj) {return new Gson().toJson(obj);}
}

该版本只支持in表达式可拓展startWith endWith contains等，动作支持hide show可拓展为其他动作