Howdy;
I suppose you are expecting the result to be a BigDecimal ?
Something like:
public void test131() throws Exception {
BigDecimal sevendot475 = new BigDecimal("7.475");
BigDecimal SO = new BigDecimal("325");
JexlContext jc = new MapContext();
jc.set("SO", SO);
JexlEngine jexl = new Engine();
String expr = "2.3*SO/100";
Object evaluate = jexl.createExpression(expr).evaluate(jc);
assertEquals(sevendot475, (BigDecimal) evaluate);
}
If so, the JexlArithmetic can be specialized/derived (or patched) to get
this result by overriding (changing) the code in
JexlArithmetic.{add,subtract,multiply,divide,mod} to check first for
BigDecimal rather than floating point numbers as in:
public Object add(Object left, Object right) {
if (left == null && right == null) {
return controlNullNullOperands();
}
try {
// if either are bigdecimal use that type
if (left instanceof BigDecimal || right instanceof BigDecimal) {
BigDecimal l = toBigDecimal(left);
BigDecimal r = toBigDecimal(right);
BigDecimal result = l.add(r, getMathContext());
return narrowBigDecimal(left, right, result);
}
// if either are floating point (double or float) use double
if (isFloatingPointNumber(left) || isFloatingPointNumber(right))
{
double l = toDouble(left);
double r = toDouble(right);
return new Double(l + r);
}
// otherwise treat as integers
BigInteger l = toBigInteger(left);
BigInteger r = toBigInteger(right);
BigInteger result = l.add(r);
return narrowBigInteger(left, right, result);
} catch (java.lang.NumberFormatException nfe) {
// Well, use strings!
if (left == null || right == null) {
controlNullOperand();
}
return toString(left).concat(toString(right));
}
}
Hope this helps,
Cheers
Henrib
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