public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
super.readExternal(in);
dataProvider = (DataProvider) in.readObject();
alphaConstraints = (AlphaNodeFieldConstraint[]) in.readObject();
betaConstraints = (BetaConstraints) in.readObject();
tupleMemoryEnabled = in.readBoolean();
from = (From) in.readObject();
resultClass = from.getResultClass();
}
