commons-dbcp2 source code read

[shi feng qiang]

I amd reading code of commons-dbcp2 source, but a piece of codes confused me.
That is  
https://github.com/apache/commons-dbcp/blob/master/src/main/java/org/apache/commons/dbcp2/DelegatingConnection.java
 of DelegatingConnection.java .


    protected void activate() {
        closed = false;
        setLastUsed();
        if (connection instanceof DelegatingConnection) {
            ((DelegatingConnection<?>) connection).activate();// 615 todo this 
line
}
    }

((DelegatingConnection<?>) connection).activate();
can this call occur infinite recursive?

best regards!