first commit

hrmsEjb/org/nfunk/jep/function/Sum.java

@@ -0,0 +1,30 @@
+package org.nfunk.jep.function;
+
+import java.util.Stack;
+import org.nfunk.jep.ParseException;
+
+public class Sum extends PostfixMathCommand {
+  private Add addFun = new Add();
+  
+  public void run(Stack paramStack) throws ParseException {
+    Number number2;
+    if (null == paramStack)
+      throw new ParseException("Stack argument null"); 
+    Number number1 = (Number)paramStack.pop();
+    if (number1 instanceof Number) {
+      number2 = number1;
+    } else {
+      throw new ParseException("Invalid parameter type");
+    } 
+    for (byte b = 1; b < this.curNumberOfParameters; b++) {
+      number1 = (Number)paramStack.pop();
+      if (number1 instanceof Number) {
+        number2 = this.addFun.add(number1, number2);
+      } else {
+        throw new ParseException("Invalid parameter type");
+      } 
+      b++;
+    } 
+    paramStack.push(number2);
+  }
+}