@Override
public void eval(QueryExpression expr, Callback<Target> callback)
throws QueryException, InterruptedException {
BatchStreamedCallback aggregator =
new BatchStreamedCallback(callback, BATCH_CALLBACK_SIZE, createUniquifier());
expr.eval(this, aggregator);
aggregator.processLastPending();
}
@Override
public String toString() {
switch (type) {
case WORD:
return "'" + word + "'";
case EXPRESSION:
return expression.toString();
case INTEGER:
return Integer.toString(integer);
default:
throw new IllegalStateException();
}
}