weaver-hrm-salary/src/com/engine/salary/service/impl/FormulaRunServiceImpl.java

package com.engine.salary.service.impl;

import com.engine.core.impl.Service;
import com.engine.salary.entity.datacollection.DataCollectionEmployee;
import com.engine.salary.entity.salaryformula.ExpressFormula;
import com.engine.salary.entity.salaryformula.po.FormulaVar;
import com.engine.salary.enums.salaryformula.ReferenceTypeEnum;
import com.engine.salary.formlua.entity.parameter.DataType;
import com.engine.salary.service.FormulaRunService;
import com.ql.util.express.DefaultContext;
import com.ql.util.express.ExpressRunner;
import lombok.extern.slf4j.Slf4j;
import org.jetbrains.annotations.Nullable;

import java.math.BigDecimal;
import java.util.List;

@Slf4j
public class FormulaRunServiceImpl extends Service implements FormulaRunService {

    private static ExpressRunner runner;

    static {
        runner = new ExpressRunner(true, false);
    }

    @Override
    public Object run(ExpressFormula expressFormula, List<FormulaVar> formulaVars, DataCollectionEmployee simpleEmployee) {

        if (ReferenceTypeEnum.parseByValue(expressFormula.getReferenceType()) == ReferenceTypeEnum.FORMULA) {
            return runFormula(expressFormula, formulaVars);
        }

        return null;
    }

    @Nullable
    private Object runFormula(ExpressFormula expressFormula, List<FormulaVar> formulaVars) {
        DefaultContext<String, Object> context = new DefaultContext<String, Object>();
        formulaVars.forEach(v -> {
            if (DataType.NUMBER.equals(v.getFieldType())) {
                context.put(v.getFieldId(), new BigDecimal(v.getContent()));
            } else {
                context.put(v.getFieldId(), v.getContent());
            }
        });
        Object execute = null;
        try {
            String formula = expressFormula.getFormulaRunScript();
            execute = runner.execute(formula, context, null, true, false);
        } catch (Exception e) {
            log.error("express execute fail", e);
        }
        return execute;
    }
}