add code for jxfpmx, not finish yet

atms-api/src/main/java/pwc/taxtech/atms/vat/service/impl/report/functions/JXFPMX.java

 package pwc.taxtech.atms.vat.service.impl.report.functions;
 
+import org.apache.commons.lang3.StringUtils;
 import org.apache.poi.ss.formula.OperationEvaluationContext;
 import org.apache.poi.ss.formula.eval.NumberEval;
 import org.apache.poi.ss.formula.eval.ValueEval;
 import org.apache.poi.ss.formula.functions.FreeRefFunction;
+import pwc.taxtech.atms.constant.Constant;
+
+import java.math.BigDecimal;
 
 
 /// <summary>
@@ -35,6 +39,32 @@ public class JXFPMX extends FunctionBase implements FreeRefFunction {
                 + amountType + "," + period + ")";
         logger.debug(formulaExpression);
 
+        int curYear = formulaContext.getYear();
+        int[] yearOffSet = {};
+        period = getPeriod(period, yearOffSet);
+        curYear = curYear + yearOffSet[0];
+
+        BigDecimal taxRateVal;
+        if (taxRate.equals(Constant.Other)) {
+            taxRateVal = new BigDecimal("-1");
+        } else if (!taxRate.endsWith("%")) {
+            if (taxRate.equals("99")) {
+                taxRateVal = new BigDecimal("99");
+            } else {
+                return NumberEval.ZERO;
+            }
+        } else {
+            taxRate = StringUtils.removeEnd(taxRate, "%");
+            try {
+                taxRateVal = new BigDecimal(Double.parseDouble(taxRate));
+            } catch (NumberFormatException ex) {
+                return NumberEval.ZERO;
+            }
+
+            taxRateVal = taxRateVal.divide(new BigDecimal("100"), 2, BigDecimal.ROUND_HALF_UP);
+        }
+
+
 
 
         return NumberEval.ZERO;