private Set<OrderedCanvasIdPair> getExistingPairs() throws IOException {
final Set<OrderedCanvasIdPair> existingPairs = new HashSet<>(8192);
if (parameters.excludePairsInMatchCollection != null) {
final List<SectionData> stackSectionDataList =
renderDataClient.getStackSectionData(parameters.stack, parameters.minZ, parameters.maxZ);
final RenderDataClient matchDataClient =
new RenderDataClient(
parameters.baseDataUrl, parameters.owner, parameters.excludePairsInMatchCollection);
String pGroupId;
for (final SectionData sectionData : stackSectionDataList) {
pGroupId = sectionData.getSectionId();
for (final CanvasMatches canvasMatches : matchDataClient.getMatchesWithPGroupId(pGroupId)) {
existingPairs.add(
new OrderedCanvasIdPair(
new CanvasId(canvasMatches.getpGroupId(), canvasMatches.getpId()),
new CanvasId(canvasMatches.getqGroupId(), canvasMatches.getqId())));
}
}
}
return existingPairs;
}
