public List<Map<String, Object>> execute(String columnNames[]) {
List<Map<String, Object>> combinedRowList = null;
Set<NoSqlPredicate> inefficientPredicates = new HashSet<NoSqlPredicate>();
for (NoSqlPredicate predicate : predicateList) {
if (predicate.canExecuteEfficiently()) {
List<Map<String, Object>> rowList = predicate.execute(columnNames);
if (combinedRowList != null) {
String primaryKeyName = storageSource.getTablePrimaryKeyName(tableName);
combinedRowList = combineRowLists(primaryKeyName, combinedRowList, rowList, operator);
} else {
combinedRowList = rowList;
}
} else {
inefficientPredicates.add(predicate);
}
}
if (inefficientPredicates.isEmpty()) return combinedRowList;
List<Map<String, Object>> filteredRowList = new ArrayList<Map<String, Object>>();
for (Map<String, Object> row : combinedRowList) {
for (NoSqlPredicate predicate : inefficientPredicates) {
if (predicate.matchesRow(row)) {
filteredRowList.add(row);
}
}
}
return filteredRowList;
}
public List<Map<String, Object>> execute(String columnNameList[]) {
List<Map<String, Object>> rowList;
if (isEqualityRange())
rowList =
storageSource.executeEqualityQuery(tableName, columnNameList, columnName, startValue);
else
rowList =
storageSource.executeRangeQuery(
tableName,
columnNameList,
columnName,
startValue,
startInclusive,
endValue,
endInclusive);
return rowList;
}
public boolean canExecuteEfficiently() {
ColumnIndexMode indexMode = storageSource.getColumnIndexMode(tableName, columnName);
switch (indexMode) {
case NOT_INDEXED:
return false;
case RANGE_INDEXED:
return true;
case EQUALITY_INDEXED:
return isEqualityRange();
}
return true;
}