IllegalArgumentException: repeated interface: java.sql.Connection with HikariDataSource

[radist-nt]

java.lang.IllegalArgumentException: repeated interface: java.sql.Connection
	at java.lang.reflect.Proxy$ProxyClassFactory.apply(Proxy.java:597)
	at java.lang.reflect.Proxy$ProxyClassFactory.apply(Proxy.java:557)
	at java.lang.reflect.WeakCache$Factory.get(WeakCache.java:230)
	at java.lang.reflect.WeakCache.get(WeakCache.java:127)
	at java.lang.reflect.Proxy.getProxyClass0(Proxy.java:419)
	at java.lang.reflect.Proxy.newProxyInstance(Proxy.java:719)
	at org.jdbcdslog.ProxyUtils.proxyForCompatibleInterfaces(ProxyUtils.java:46)
	at org.jdbcdslog.ProxyUtils.wrapByConnectionProxy(ProxyUtils.java:84)
	at org.jdbcdslog.DataSourceProxyBase.getConnection(DataSourceProxyBase.java:48)
...

This happens because HikariDataSource provides HikariProxyConnection (implements Connection) object that inherits ProxyConnection (implements Connection).

Proposed fix for method org.jdbcdslog.ProxyUtils.findCompatibleInterfaces(Class, Class) is

    /**
     * Find all interfaces of clazz that is-a requiredInterface.
     *
     * @param clazz
     * @param requiredInterface
     * @return
     */
    public static Class<?>[] findCompatibleInterfaces(Class<?> clazz, Class<?> requiredInterface) {
        IdentityHashMap<Class<?>, Object> interfaces = new IdentityHashMap<Class<?>, Object>();
        //ArrayList<Class<?>> interfaces = new ArrayList<Class<?>>();
        for ( ; ! clazz.equals(Object.class) ; clazz = clazz.getSuperclass()) {
            for (Class<?> iface : clazz.getInterfaces()) {
                if (requiredInterface.isAssignableFrom(iface)) {
                    //interfaces.add(iface);
                    interfaces.put(iface, null);
                }
            }
        }
        //return interfaces.toArray(EMPTY_CLASS_ARRAY);
        return interfaces.keySet().toArray(EMPTY_CLASS_ARRAY);
    }