- Fixed equals() to work between different GenericInteger

implementations (subclasses)
- Fixed error parsing empty <AttributeValue />, e.g. for anyURI

src/main/java/org/ow2/authzforce/core/pdp/api/value/ArbitrarilyBigInteger.java

@@ -34,7 +34,7 @@ public final class ArbitrarilyBigInteger extends GenericInteger
 	private static final long serialVersionUID = 1L;
 
 	private static final IllegalArgumentException TOO_BIGINTEGER_FOR_DOUBLE_ILLEGAL_ARGUMENT_EXCEPTION = new IllegalArgumentException(
-			"BigInteger argument outside the range which can be represented by a double");
+	        "BigInteger argument outside the range which can be represented by a double");
 
 	private static final Logger LOGGER = LoggerFactory.getLogger(ArbitrarilyBigInteger.class);
 
@@ -102,8 +102,7 @@ public final class ArbitrarilyBigInteger extends GenericInteger
 		{
 			l = big.longValueExact();
 			return INSTANCE_FACTORY.getValue(l);
-		}
-		catch (final ArithmeticException e)
+		} catch (final ArithmeticException e)
 		{
 			LOGGER.debug("Input integer value is too big to fit in a long: {}", big);
 		}
@@ -178,13 +177,13 @@ public final class ArbitrarilyBigInteger extends GenericInteger
 			return true;
 		}
 
-		if (!(obj instanceof ArbitrarilyBigInteger))
+		if (!(obj instanceof GenericInteger))
 		{
 			return false;
 		}
 
-		final ArbitrarilyBigInteger other = (ArbitrarilyBigInteger) obj;
-		return value.equals(other.value);
+		final GenericInteger other = (GenericInteger) obj;
+		return value.equals(other.bigIntegerValue());
 	}
 
 	/** {@inheritDoc} */

src/main/java/org/ow2/authzforce/core/pdp/api/value/LongInteger.java

@@ -156,12 +156,19 @@ public final class LongInteger extends GenericInteger
 			return true;
 		}
 
-		if (!(obj instanceof LongInteger))
+		if (!(obj instanceof GenericInteger))
+		{
+			return false;
+		}
+
+		final GenericInteger other = (GenericInteger) obj;
+		try
+		{
+			return value == other.longValueExact();
+		} catch (final ArithmeticException e)
 		{
 			return false;
 		}
-		final LongInteger other = (LongInteger) obj;
-		return value == other.value;
 	}
 
 	@Override

src/main/java/org/ow2/authzforce/core/pdp/api/value/MediumInteger.java

@@ -155,12 +155,19 @@ public final class MediumInteger extends GenericInteger
 			return true;
 		}
 
-		if (!(obj instanceof MediumInteger))
+		if (!(obj instanceof GenericInteger))
+		{
+			return false;
+		}
+
+		final GenericInteger other = (GenericInteger) obj;
+		try
+		{
+			return value == other.intValueExact();
+		} catch (final ArithmeticException e)
 		{
 			return false;
 		}
-		final MediumInteger other = (MediumInteger) obj;
-		return value == other.value;
 	}
 
 	@Override