Add scaled big decimal features (#56)

* add comparison and roundingmodes to ScaledBigDecimal

* add isEqual comparing by value

* add valueOf BigDecimal

Author: Piiit

src/main/java/it/aboutbits/springboot/toolbox/type/ScaledBigDecimal.java

@@ -13,6 +13,7 @@
  * It also provides a set of arithmetic operations that return new instances with the appropriate scale and rounding.
  */
 @NullMarked
+@SuppressWarnings("unused")
 public record ScaledBigDecimal(
         BigDecimal value
 ) implements CustomType<BigDecimal>, Comparable<ScaledBigDecimal> {
@@ -112,6 +113,10 @@ public static ScaledBigDecimal valueOf(String value) {
         return new ScaledBigDecimal(value);
     }
 
+    public static ScaledBigDecimal valueOf(BigDecimal value) {
+        return new ScaledBigDecimal(value);
+    }
+
     public ScaledBigDecimal add(ScaledBigDecimal other) {
         return new ScaledBigDecimal(this.value().add(other.value()));
     }
@@ -188,10 +193,18 @@ public BigDecimal toBigDecimal(int scale) {
         return this.value().setScale(scale, RoundingMode.HALF_UP);
     }
 
+    public BigDecimal toBigDecimal(int scale, RoundingMode roundingMode) {
+        return this.value().setScale(scale, roundingMode);
+    }
+
     public ScaledBigDecimal roundToScale(int scale) {
         return new ScaledBigDecimal(this.value().setScale(scale, RoundingMode.HALF_UP));
     }
 
+    public ScaledBigDecimal roundToScale(int scale, RoundingMode roundingMode) {
+        return new ScaledBigDecimal(this.value().setScale(scale, roundingMode));
+    }
+
     @Override
     public String toString() {
         return this.value().toString();
@@ -203,8 +216,8 @@ public boolean equals(Object o) {
             return true;
         }
 
-        if (o instanceof ScaledBigDecimal other) {
-            return this.value().compareTo(other.value()) == 0;
+        if (o instanceof ScaledBigDecimal(BigDecimal other)) {
+            return this.value().compareTo(other) == 0;
         }
 
         return false;
@@ -261,4 +274,44 @@ public byte byteValue() {
     public short shortValue() {
         return (short) intValue();
     }
+
+    public boolean isZero() {
+        return this.value().compareTo(BigDecimal.ZERO) == 0;
+    }
+
+    public boolean isNegative() {
+        return this.value().compareTo(BigDecimal.ZERO) < 0;
+    }
+
+    public boolean isPositive() {
+        return this.value().compareTo(BigDecimal.ZERO) > 0;
+    }
+
+    public boolean isPositiveOrZero() {
+        return this.value().compareTo(BigDecimal.ZERO) >= 0;
+    }
+
+    public boolean isNegativeOrZero() {
+        return this.value().compareTo(BigDecimal.ZERO) <= 0;
+    }
+
+    public boolean isEqual(ScaledBigDecimal other) {
+        return this.compareTo(other) == 0;
+    }
+
+    public boolean isBiggerThan(ScaledBigDecimal other) {
+        return this.compareTo(other) > 0;
+    }
+
+    public boolean isEqualOrBiggerThan(ScaledBigDecimal other) {
+        return this.compareTo(other) >= 0;
+    }
+
+    public boolean isSmallerThan(ScaledBigDecimal other) {
+        return this.compareTo(other) < 0;
+    }
+
+    public boolean isEqualOrSmallerThan(ScaledBigDecimal other) {
+        return this.compareTo(other) <= 0;
+    }
 }

src/main/java/it/aboutbits/springboot/toolbox/validation/validator/NegativeOrZeroScaledBigDecimalValidator.java

@@ -12,6 +12,6 @@ public boolean isValid(ScaledBigDecimal value, ConstraintValidatorContext contex
             return true;
         }
 
-        return value.compareTo(ScaledBigDecimal.ZERO) < 1;
+        return value.isNegativeOrZero();
     }
 }

src/main/java/it/aboutbits/springboot/toolbox/validation/validator/NegativeScaledBigDecimalValidator.java

@@ -12,6 +12,6 @@ public boolean isValid(ScaledBigDecimal value, ConstraintValidatorContext contex
             return true;
         }
 
-        return value.compareTo(ScaledBigDecimal.ZERO) < 0;
+        return value.isNegative();
     }
 }

src/main/java/it/aboutbits/springboot/toolbox/validation/validator/PositiveOrZeroScaledBigDecimalValidator.java

@@ -12,6 +12,6 @@ public boolean isValid(ScaledBigDecimal value, ConstraintValidatorContext contex
             return true;
         }
 
-        return value.compareTo(ScaledBigDecimal.ZERO) > -1;
+        return value.isPositiveOrZero();
     }
 }

src/main/java/it/aboutbits/springboot/toolbox/validation/validator/PositiveScaledBigDecimalValidator.java

@@ -12,6 +12,6 @@ public boolean isValid(ScaledBigDecimal value, ConstraintValidatorContext contex
             return true;
         }
 
-        return value.compareTo(ScaledBigDecimal.ZERO) > 0;
+        return value.isPositive();
     }
 }