Version 1.2.136 could not be converted to Java 1.4 (because the Retrotranslator…

Version 1.2.136 could not be converted to Java 1.4 (because the Retrotranslator doesn't support BigDecimal.precision).

h2/src/main/org/h2/util/MathUtils.java

@@ -30,6 +30,8 @@ public class MathUtils {
      */
     static volatile boolean seeded;
 
+    private static boolean usePrecisionWorkaround;
+
     private static final Random RANDOM  = new Random();
 
     /**
@@ -304,6 +306,24 @@ public class MathUtils {
         return (reverseInt((int) (x >>> 32L)) & 0xffffffffL) ^ (((long) reverseInt((int) x)) << 32L);
     }
 
+    /**
+     * Compatibility for BigDecimal.precision() which is not available in Java 1.4.
+     *
+     * @param x the value
+     * @return the precision
+     */
+    public static int precision(BigDecimal x) {
+        if (!usePrecisionWorkaround) {
+            try {
+                return x.precision();
+            } catch (Exception e) {
+                // NoSuchMethodError
+                usePrecisionWorkaround = true;
+            }
+        }
+        return x.unscaledValue().abs().toString().length();
+    }
+
     /**
      * Compare two values. Returns -1 if the first value is smaller, 1 if bigger,
      * and 0 if equal.

h2/src/main/org/h2/value/ValueDecimal.java

@@ -134,7 +134,7 @@ public class ValueDecimal extends Value {
 
     public long getPrecision() {
         if (precision == 0) {
-            precision = value.precision();
+            precision = MathUtils.precision(value);
         }
         return precision;
     }
@@ -211,7 +211,7 @@ public class ValueDecimal extends Value {
     }
 
     public int getMemory() {
-        return value.precision() * 3 + 120;
+        return MathUtils.precision(value) * 3 + 120;
     }
 
 }