public DatasetScanFilter(List<Selector> selectorGroup) {
if (selectorGroup == null || selectorGroup.isEmpty()) {
this.selectorGroup = Collections.emptyList();
this.containsAtomicIncluders = false;
this.containsAtomicExcluders = false;
this.containsCollectionIncluders = false;
this.containsCollectionExcluders = false;
} else {
boolean anyAtomicIncluders = false;
boolean anyAtomicExcluders = false;
boolean anyCollectionIncluders = false;
boolean anyCollectionExcluders = false;
List<Selector> tmpSelectorGroup = new ArrayList<Selector>();
for (Selector curSelector : selectorGroup) {
if (curSelector.isIncluder()) {
if (curSelector.isApplyToAtomicDataset()) anyAtomicIncluders = true;
if (curSelector.isApplyToCollectionDataset()) anyCollectionIncluders = true;
} else { // curSelector.isExcluder()
if (curSelector.isApplyToAtomicDataset()) anyAtomicExcluders = true;
if (curSelector.isApplyToCollectionDataset()) anyCollectionExcluders = true;
}
tmpSelectorGroup.add(curSelector);
}
this.selectorGroup = tmpSelectorGroup;
this.containsAtomicIncluders = anyAtomicIncluders;
this.containsAtomicExcluders = anyAtomicExcluders;
this.containsCollectionIncluders = anyCollectionIncluders;
this.containsCollectionExcluders = anyCollectionExcluders;
}
}
public DatasetScanFilter(Selector selector) {
if (selector == null) {
this.selectorGroup = Collections.emptyList();
this.containsAtomicIncluders = false;
this.containsAtomicExcluders = false;
this.containsCollectionIncluders = false;
this.containsCollectionExcluders = false;
} else {
boolean anyAtomicIncluders = false;
boolean anyAtomicExcluders = false;
boolean anyCollectionIncluders = false;
boolean anyCollectionExcluders = false;
if (selector.isIncluder()) {
if (selector.isApplyToAtomicDataset()) anyAtomicIncluders = true;
if (selector.isApplyToCollectionDataset()) anyCollectionIncluders = true;
} else { // curSelector.isExcluder()
if (selector.isApplyToAtomicDataset()) anyAtomicExcluders = true;
if (selector.isApplyToCollectionDataset()) anyCollectionExcluders = true;
}
this.selectorGroup = Collections.singletonList(selector);
this.containsAtomicIncluders = anyAtomicIncluders;
this.containsAtomicExcluders = anyAtomicExcluders;
this.containsCollectionIncluders = anyCollectionIncluders;
this.containsCollectionExcluders = anyCollectionExcluders;
}
}
public boolean accept(MFile dataset) {
if (dataset == null) return false;
// If no Selectors, accept all datasets.
if (this.selectorGroup.isEmpty()) return true;
if (dataset.isDirectory()) {
// If no collection selectors, accept all collection datasets.
if (!this.containsCollectionIncluders && !this.containsCollectionExcluders) return true;
} else {
// If no atomic selectors, accept all atomic datasets.
if (!this.containsAtomicIncluders && !this.containsAtomicExcluders) return true;
}
boolean include = false;
boolean exclude = false;
for (Selector curSelector : this.selectorGroup) {
if (curSelector.isApplicable(dataset)) {
if (curSelector.match(dataset)) {
if (curSelector.isIncluder()) include = true;
else exclude = true;
}
}
}
// Deal with atomic datasets
if (!dataset.isDirectory()) {
// If have only inclusion Selectors, accept any dataset that is explicitly included.
if (this.containsAtomicIncluders && !this.containsAtomicExcluders) return include;
// If have only exclusion Selectors, accept any dataset not explicitly excluded.
if (this.containsAtomicExcluders && !this.containsAtomicIncluders) return !exclude;
// If have both inclusion and exclusion Selectors, accept datasets that are
// explicitly included but not explicitly excluded.
if (this.containsAtomicIncluders && this.containsAtomicExcluders && include) return !exclude;
// Deal with collection datasets
} else {
// If have only inclusion Selectors, accept any dataset that is explicitly included.
if (this.containsCollectionIncluders && !this.containsCollectionExcluders) return include;
// If have only exclusion Selectors, accept any dataset not explicitly excluded.
if (this.containsCollectionExcluders && !this.containsCollectionIncluders) return !exclude;
// If have both inclusion and exclusion Selectors, accept datasets that are
// explicitly included but not explicitly excluded.
if (this.containsCollectionIncluders && this.containsCollectionExcluders && include)
return !exclude;
}
// Otherwise, don't accept.
return false;
}