公式计算

src/main/java/com/fanruan/api/cal/FormulaKit.java

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+package com.fanruan.api.cal;
+
+import com.fanruan.api.err.KitError;
+import com.fr.base.BaseFormula;
+import com.fr.script.Calculator;
+import com.fr.stable.UtilEvalError;
+import com.fr.stable.script.CalculatorProvider;
+
+/**
+ * @author richie
+ * @version 10.0
+ * Created by richie on 2019-08-15
+ * 公式计算相关的工具类
+ */
+public class FormulaKit {
+
+    /**
+     * 计算公式的值，会新建一个算子对象来计算该公式
+     * @param formula 公式内容
+     * @return 公式计算后的结果值
+     * @throws KitError 如果计算过程中出现错误，则抛出此异常
+     */
+    public static Object eval(String formula) throws KitError {
+        return eval(Calculator.createCalculator(), formula);
+    }
+
+    /**
+     * 计算公式的值
+     * @param calculator 自定义算子
+     * @param formula 公式内容
+     * @return 公式计算后的结果值
+     * @throws KitError 如果计算过程中出现错误，则抛出此异常
+     */
+    public static Object eval(CalculatorProvider calculator, String formula) throws KitError {
+        try {
+            return BaseFormula.createFormulaBuilder().build(formula).eval(calculator);
+        } catch (UtilEvalError u) {
+            throw new KitError(u);
+        }
+    }
+}

src/main/java/com/fanruan/api/err/KitError.java

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+package com.fanruan.api.err;
+
+/**
+ * @author richie
+ * @version 10.0
+ * Created by richie on 2019-08-15
+ */
+public class KitError extends Exception {
+
+    public KitError() {
+        super();
+    }
+
+    public KitError(String message) {
+        super(message);
+    }
+
+    public KitError(Throwable throwable) {
+        super(throwable);
+    }
+}

src/test/java/com/fanruan/api/cal/FormulaKitTest.java

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+package com.fanruan.api.cal;
+
+import com.fanruan.api.Prepare;
+import com.fanruan.api.err.KitError;
+import com.fr.base.ParameterMapNameSpace;
+import com.fr.script.Calculator;
+import com.fr.stable.script.CalculatorProvider;
+import com.fr.stable.script.NameSpace;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.junit.Assert.*;
+
+/**
+ * @author richie
+ * @version 10.0
+ * Created by richie on 2019-08-15
+ */
+public class FormulaKitTest extends Prepare {
+
+    @Test
+    public void eval() {
+        try {
+            Assert.assertEquals(4, FormulaKit.eval("=(6+6)/3"));
+        } catch (KitError kitError) {
+            Assert.fail();
+        }
+    }
+
+    @Test
+    public void testEval() {
+        CalculatorProvider calculator = Calculator.createCalculator();
+        Map<String, Object> map = new HashMap<>();
+        map.put("a", 1);
+        map.put("b", 2);
+        calculator.pushNameSpace(ParameterMapNameSpace.create(map));
+        try {
+            Assert.assertEquals(1, FormulaKit.eval(calculator,"=($a+$b)/3"));
+        } catch (KitError kitError) {
+            Assert.fail();
+        }
+    }
+}

src/test/java/com/fanruan/api/data/TableDataKitTest.java

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+package com.fanruan.api.data;
+
+import com.fanruan.api.Prepare;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * @author richie
+ * @version 10.0
+ * Created by richie on 2019-08-15
+ */
+public class TableDataKitTest extends Prepare {
+
+    @Test
+    public void getTableData() {
+    }
+
+    @Test
+    public void testGetTableData() {
+    }
+}