public OperationOutputFactory(Factory parent, Fields selfFields) {
_parent = parent;
_fieldIndex = new HashMap(parent.getFieldIndex());
int myIndex = parent.numDelegates();
for (int i = 0; i < selfFields.size(); i++) {
String field = selfFields.get(i);
_fieldIndex.put(field, new ValuePointer(myIndex, i, field));
}
List<String> myOrder = new ArrayList<String>(parent.getOutputFields());
Set<String> parentFieldsSet = new HashSet<String>(myOrder);
for (String f : selfFields) {
if (parentFieldsSet.contains(f)) {
throw new IllegalArgumentException(
"Additive operations cannot add fields with same name as already exists. "
+ "Tried adding "
+ selfFields
+ " to "
+ parent.getOutputFields());
}
myOrder.add(f);
}
_index = ValuePointer.buildIndex(new Fields(myOrder), _fieldIndex);
}
public FreshOutputFactory(Fields selfFields) {
_fieldIndex = new HashMap<String, ValuePointer>();
for (int i = 0; i < selfFields.size(); i++) {
String field = selfFields.get(i);
_fieldIndex.put(field, new ValuePointer(0, i, field));
}
_index = ValuePointer.buildIndex(selfFields, _fieldIndex);
}
public ProjectionFactory(Factory parent, Fields projectFields) {
_parent = parent;
if (projectFields == null) projectFields = new Fields();
Map<String, ValuePointer> parentFieldIndex = parent.getFieldIndex();
_fieldIndex = new HashMap<String, ValuePointer>();
for (String f : projectFields) {
_fieldIndex.put(f, parentFieldIndex.get(f));
}
_index = ValuePointer.buildIndex(projectFields, _fieldIndex);
}