@Override
public Iterator<Item> iterator() {
PathQuery pq = new PathQuery(services.getModel());
pq.addViews(PQUtil.getStar(services.getModel(), getType()));
pq.addConstraint(Constraints.in(type, name));
Iterator<Map<String, Object>> it = services.getQueryService().getRowMapIterator(pq);
return new ItemIterator(it);
}
@SuppressWarnings("unchecked")
@Override
public boolean removeAll(@SuppressWarnings("rawtypes") Collection c) {
int priorSize = getSize();
if (c instanceof ItemList) {
ItemList res = subtract(((ItemList) c));
update(res);
delete();
res.rename(getName());
} else if (!c.isEmpty()) {
try {
Item[] is = (Item[]) c.toArray(new Item[0]);
String path = is[0].getType() + ".id";
PathQuery pq = new PathQuery(services.getModel());
pq.addView(path);
pq.addConstraint(
Constraints.oneOfValues(
path,
collect(
collect(Arrays.asList(is), invokerTransformer("getId")),
stringValueTransformer())));
createListAndSubtract(pq);
} catch (ArrayStoreException e) {
// Do nothing - we didn't get a collection of items.
}
}
return priorSize != getSize();
}
/**
* Convenience method for finding members of a collection matching certain properties.
*
* <p>This search is implemented with a query that performs case-insensitive matching on values.
* Null constraints will be honoured, but other lookups will be converted to strings. Wild-cards
* are permitted wherever they are permitted in path-queries. <br>
* Using a query to back the search means that finding matching members is efficient even over
* large lists - you will not need to pull in and iterate over thousands of rows of data to find
* items if you have specific conditions. <br>
* These conditions must all match for the result to be included. For more specific and flexible
* searching strategies, please see the {@link PathQuery} API.
*
* @param conditions The properties these elements should have.
* @return A list of matching items.
*/
public List<Item> find(Map<String, Object> conditions) {
List<Item> ret = new ArrayList<Item>();
PathQuery q = new PathQuery(services.getModel());
q.addViews(PQUtil.getStar(services.getModel(), type));
q.addConstraint(Constraints.in(type, name));
for (Entry<String, Object> condition : conditions.entrySet()) {
String path = type + "." + condition.getKey();
if (condition.getValue() == null) {
q.addConstraint(Constraints.isNull(path));
} else {
q.addConstraint(Constraints.eq(path, condition.getValue().toString()));
}
}
List<Map<String, Object>> results = services.getQueryService().getRowsAsMaps(q);
for (Map<String, Object> result : results) {
ret.add(new Item(services, type, result));
}
return ret;
}
/**
* Add items to this list by using a query.
*
* @param items The items to add to the list.
*/
private void appendItems(Iterable<Item> items) {
PathQuery pq = new PathQuery(services.getModel());
pq.addViews(getType() + ".id");
Set<String> values = new HashSet<String>();
for (Item i : items) {
values.add(Integer.toString(i.getId()));
}
pq.addConstraint(Constraints.oneOfValues(getType() + ".id", values));
update(services.getListService().append(this, pq));
}
@Override
public boolean remove(Object i) {
int priorSize = getSize();
if (i instanceof Item) {
Item item = (Item) i;
String path = item.getType() + ".id";
PathQuery pq = new PathQuery(services.getModel());
pq.addView(path);
pq.addConstraint(Constraints.eq(path, Integer.toString(item.getId())));
createListAndSubtract(pq);
}
return priorSize != getSize();
}
