BN should unwrap to the underlying java.math.BigInteger

Author: kares

src/main/java/org/jruby/ext/openssl/BN.java

@@ -280,7 +280,7 @@ public IRubyObject to_i() {
     }
 
     @JRubyMethod(name = "to_bn")
-    public IRubyObject to_bn() {
+    public BN to_bn() {
         return this;
     }
 
@@ -852,4 +852,14 @@ public static BigInteger getBigInteger(final IRubyObject arg) {
         throw arg.getRuntime().newTypeError("Cannot convert into OpenSSL::BN");
     }
 
+    @Override
+    public Object toJava(Class target) {
+        if ( target.isAssignableFrom(BigInteger.class) || target == Number.class ) return value;
+        if ( target == Long.class || target == Long.TYPE ) return value.longValue();
+        if ( target == Integer.class || target == Integer.TYPE ) return value.intValue();
+        if ( target == Double.class || target == Double.TYPE ) return value.doubleValue();
+        if ( target == Float.class || target == Float.TYPE ) return value.floatValue();
+        return super.toJava(target);
+    }
+
 }

src/test/ruby/test_bn.rb

@@ -38,4 +38,9 @@ def test_to_bn
     assert_equal bn, 1234567890123456789012345678901234567890.to_bn
   end
 
+  def test_to_java
+    assert_equal java.lang.Integer.new(42), OpenSSL::BN.new('42').to_java(:int)
+    assert_equal java.math.BigInteger.valueOf(24), OpenSSL::BN.new('24').to_java
+  end if defined? JRUBY_VERSION
+
 end