@Override
public boolean apply() {
if (!areBothDelegatesValid()) {
return false;
}
if (firstDelegate.needsParameter()) {
firstDelegate.invoke(secondDelegate.invoke());
return true;
} else if (secondDelegate.needsParameter()) {
secondDelegate.invoke(firstDelegate.invoke());
return true;
}
return false;
}
protected boolean areBothDelegatesValid() {
return firstDelegate.isValid() && secondDelegate.isValid();
}