@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);
}
/**
* 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));
}
@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();
}
private void createListAndSubtract(PathQuery pq) {
ListCreationInfo info = services.getListService().new ListCreationInfo(pq);
ItemList removalList = null;
try {
removalList = services.getListService().createList(info);
ItemList res = subtract(removalList);
update(res);
delete();
res.rename(getName());
} finally {
try {
removalList.delete();
} catch (Exception e) {
// Ignore
}
}
}
/**
* 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;
}
@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();
}
@SuppressWarnings("unchecked")
@Override
public boolean containsAll(@SuppressWarnings("rawtypes") Collection c) {
if (c == null) {
return false;
}
Item[] candidates;
try {
candidates = (Item[]) c.toArray(new Item[c.size()]);
} catch (ArrayStoreException e) {
return false;
}
return services.getListService().contains(this, candidates);
}
/** Make sure that the tags on this object are up-to-date with those stored on the server. */
public void updateTags() {
tags = services.getListService().getTags(this);
}
/**
* Rename this list on the server.
*
* <p>This method will update the name of the list stored on the server, and also change of the
* name returned by this object.
*
* @param newName The new name to give this list.
*/
public void rename(String newName) {
ItemList updated = services.getListService().rename(this, newName);
this.name = updated.getName();
}
/**
* Remove the items in the given lists from this list.
*
* <p>This call performs the operation of asymmetric difference on the current list and returns
* the result. For operations that alter the current list see {@link #removeAll(Collection)}
*
* @param lists The lists to subtract from this list.
* @param info The options describing the new list.
* @return A new list
*/
public ItemList subtract(ListOperationInfo info, Collection<ItemList> lists) {
return services.getListService().subtract(info, Collections.singleton(this), lists);
}
/**
* Remove the items in the given lists from this list.
*
* <p>This call performs the operation of asymmetric difference on the current list and returns
* the result. For operations that alter the current list see {@link #removeAll(Collection)}
*
* @param lists The lists to subtract from this list.
* @return A new list
*/
public ItemList subtract(Collection<ItemList> lists) {
return services.getListService().subtract(Collections.singleton(this), lists);
}
/**
* Remove the items in the given lists from this list.
*
* <p>This call performs the operation of asymmetric difference on the current list and returns
* the result. For operations that alter the current list see {@link #removeAll(Collection)}
*
* @param lists The lists to subtract from this list.
* @param info The options describing the new list.
* @return A new list
*/
public ItemList subtract(ListOperationInfo info, ItemList... lists) {
return services
.getListService()
.subtract(info, Collections.singleton(this), Arrays.asList(lists));
}
/**
* Remove the items in the given lists from this list.
*
* <p>This call performs the operation of asymmetric difference on the current list and returns
* the result. For operations that alter the current list see {@link #removeAll(Collection)}
*
* @param lists The lists to subtract from this list.
* @return A new list
*/
public ItemList subtract(ItemList... lists) {
return services.getListService().subtract(Collections.singleton(this), Arrays.asList(lists));
}
/**
* Call for this list to be deleted on the server. As soon as the call returns, this list should
* no longer be used for any operation.
*/
public void delete() {
services.getListService().deleteList(this);
}
/**
* Add some new tags to this list. After adding, list will have an updated set of tags, and the
* tags will be stored on the server.
*
* @param newTags The tags to add.
*/
public void addTags(String... newTags) {
tags = services.getListService().addTags(this, newTags);
}
/**
* Remove some tags from this list. After removing, the list will have an updated set of tags, and
* the tags will be synchronised with those on the server.
*
* @param removeThese The tags to remove.
*/
public void removeTags(String... removeThese) {
tags = services.getListService().removeTags(this, removeThese);
}
/**
* Add new items to the list by resolving the identifiers of objects.
*
* <p>This method will update the size of the list, and clear the items cache.
*
* @param ids The identifiers to use to find objects to add.
*/
public void append(String... ids) {
update(services.getListService().append(this, ids));
}
/**
* Add new items to the list by resolving the identifiers of objects.
*
* <p>This method will update the size of the list, and clear the items cache.
*
* @param pq The query to run to find objects with.
*/
public void append(PathQuery pq) {
update(services.getListService().append(this, pq));
}
/**
* Add new items to the list by resolving the identifiers of objects.
*
* <p>This method will update the size of the list, and clear the items cache.
*
* @param ids The identifiers to use to find objects to add.
*/
public void append(Collection<? extends String> ids) {
update(services.getListService().append(this, ids.toArray(new String[ids.size()])));
}
