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[VIVO-1031] Faster list filtering (for large lists)

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This commit is contained in:
grahamtriggs 2015-11-02 10:29:54 +00:00
parent c8818932a4
commit 6a4dfbb43f
1 changed files with 20 additions and 7 deletions
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27
webapp/src/edu/cornell/mannlib/vitro/webapp/web/templatemodels/individual/CollatedObjectPropertyTemplateModel.java
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@ -140,17 +140,24 @@ public class CollatedObjectPropertyTemplateModel extends
// others will be removed
List<Map<String, String>> filteredList = new ArrayList<Map<String, String>>();
Set<String> processedObjects = new HashSet<String>();
for (Map<String, String> outerMap : statementData) {
for (int outerIndex = 0; outerIndex < statementData.size(); outerIndex++) {
Map<String, String> outerMap = statementData.get(outerIndex);
String objectUri = outerMap.get(objectVariableName);
if (processedObjects.contains(objectUri)) {
continue;
}
processedObjects.add(objectUri);
if (outerIndex == statementData.size() - 1) {
filteredList.add(outerMap);
continue;
}
List<Map<String, String>> dataForThisObject = new ArrayList<Map<String, String>>();
dataForThisObject.add(outerMap);
//Retrieve the statements that are related to this specific object
for (Map<String, String> innerMap : statementData) {
for (int innerIndex = outerIndex + 1; innerIndex < statementData.size(); innerIndex++) {
Map<String, String> innerMap = statementData.get(innerIndex);
if (innerMap.get(objectVariableName).equals(objectUri)) {
// Subclass should at this point contain the most specific
// type already
@ -161,13 +168,19 @@ public class CollatedObjectPropertyTemplateModel extends
if(log.isDebugEnabled()) {
log.debug("Object URI " + objectUri + " has number of statements = " + dataForThisObject.size());
}
//Subclass variable should already reflect most specifick types but there may be more than one most specific type
Collections.sort(dataForThisObject, new DataComparatorBySubclass());
filteredList.add(dataForThisObject.get(0));
if (dataForThisObject.size() == 1) {
filteredList.add(outerMap);
} else {
//Subclass variable should already reflect most specifick types but there may be more than one most specific type
Collections.sort(dataForThisObject, new DataComparatorBySubclass());
filteredList.add(dataForThisObject.get(0));
}
}
statementData.retainAll(filteredList);
if (statementData.size() > filteredList.size()) {
statementData.retainAll(filteredList);
}
if (log.isDebugEnabled()) {
log.debug("Data after subclass filtering");