QueryBuilder missingFiletr = QueryHelper.andQuery(incCatsEmptyFilter, excCatsEmptyFilter, incEmptyFilter, excEmptyFilter);
I am calling andQuery method and all the parameters of andFilterBuilders()
are going to filterBuilders array nad now I am extracting this into filterBuilder as i want to and all the queryBuilders. Is it correct format
public static QueryBuilder andQuery(QueryBuilder... filterBuilders) {
QueryBuilder filterBuilder = null;
if (filterBuilders != null && filterBuilders.length > 0) {
for(int i = 0 ; i < filterBuilders.length ; i++){
filterBuilder = QueryBuilders.boolQuery().filter(filterBuilders[i]);
}
}
return filterBuilder;
}
No, you are creating a new bool/filter query on each iteration and reassigning it to the same variable, that won't work. You need to do it like this instead:
public static QueryBuilder andQuery(QueryBuilder... filterBuilders) {
BoolQueryBuilder filterBuilder = null;
if (filterBuilders != null && filterBuilders.length > 0) {
// create the bool query here
filterBuilder = QueryBuilders.boolQuery();
for(QueryBuilder filter : filterBuilders){
// add each filter to the bool query here
filterBuilder.filter(filter);
}
}
return filterBuilder;
}
Related
Hi I am able to populate QueryContainer with DateRangeQuery array as shown below QueryContainer marriageDateQuerys = null;
if (!string.IsNullOrEmpty((item.marriage_date)))
{
DateRangeQuery query = new DateRangeQuery();
query.Field = "marriages.marriage_date";
query.Name = item.marriage_date;
query.GreaterThanOrEqualTo = item.marriage_date;
query.LessThanOrEqualTo = item.marriage_date;
marriageDateQuerys &= query;
}
But when I use QueryContainer to use MatchQuery/TermQuery to populate data it is not happening.
QueryContainer marriageSpouseFirstNameQuerys = null;
if (!string.IsNullOrEmpty((item.spouse_first_name)))
{
MatchQuery query = new MatchQuery();
query.Field = "marriages.spouse_first_name";
query.Name = item.spouse_first_name;
marriageSpouseFirstNameQuerys &= query;
}
Query object is created in last if condition but marriageSpouseFirstNameQuerys is not populated with the same. I even tried marriageSpouseFirstNameQuerys += query; but without any success
Didn't try it but you can try something like this
Query = new QueryContainer(new BoolQuery
{
Must = new List<QueryContainer>
{
new MatchQuery
{
//props
},
new TermQuery
{
Field = field
Value = value
},
}
})
Below code worked for me after making changes with eyildiz answer
if (!string.IsNullOrEmpty((item.spouse_last_name)))
{
marriageSpouseLastNameQuery = new QueryContainer(
new MatchQuery
{
Field = "marriages.spouse_last_name",
Query = item.spouse_last_name
});
lstmarriageSpouseLastNameQuerys.Add(marriageSpouseLastNameQuery);
}
Top / Bottom / Random "N" rows in each group using Hibernate Criteria / Projections
How to retrieve top 5 Questions for Each Sub Topic
DetachedCriteria criteria = DetachedCriteria.forClass(Question.class);
ProjectionList projList = Projections.projectionList();
projList.add(Projections.property("questionId"));
projList.add(Projections.groupProperty("subTopicId"));
criteria.setProjection(projList);
List<Object> resultList = (List<Object>) getHibernateTemplate().findByCriteria(criteria);
Iterator<Object> itr = resultList.iterator();
List<Integer> questionIdList = new ArrayList<Integer>();
while(itr.hasNext()){
Object ob[] = (Object[])itr.next();
System.out.println(ob[0]+" -- "+ob[1]);
}
I am Using the Code Below for Getting Result Temporally, Is there any solution from Hibernate using Criteria API / Any other alternate way to get the result
Set<Integer> getQuestionsBySubTopicWithLimit(Set<Integer> questionIdsSet, Integer subjectId, Integer limit, Integer status) {
DetachedCriteria criteria = DetachedCriteria.forClass(Question.class);
if(subjectId!=null && subjectId!=0){
criteria.add(Restrictions.eq("subjectId", subjectId));
}
if(status!=null){
criteria.add(Restrictions.eq("status", status));
}
if(questionIdsSet!=null && !questionIdsSet.isEmpty()){
criteria.add(Restrictions.not(Restrictions.in("questionId", questionIdsSet)));
}
ProjectionList projList = Projections.projectionList();
projList.add(Projections.property("questionId"));
projList.add(Projections.property("subTopicId"));
criteria.add(Restrictions.sqlRestriction("1=1 order by sub_topic_id, rand()"));
criteria.setProjection(projList);
List<Object> resultList = (List<Object>) getHibernateTemplate().findByCriteria(criteria);
Iterator<Object> itr = resultList.iterator();
Set<Integer> tmpQuestionIdsSet = new HashSet<Integer>();
Integer subTopicId = 0, tmpSubTopicId = 0;
Integer count = 0;
while(itr.hasNext()){
Object ob[] = (Object[])itr.next();
if(count==0){
subTopicId = (Integer) ob[1];
}
tmpSubTopicId = (Integer) ob[1];
if(tmpSubTopicId!=subTopicId){
subTopicId = tmpSubTopicId;
count = 0;
}
count++;
if(count<=limit){
tmpQuestionIdsSet.add((Integer) ob[0]);
}
}
return tmpQuestionIdsSet;
}
I have a generic repository method to enable server side paging:
public virtual IEnumerable<T> GetList(out int totalPages, Expression<Func<T, bool>> filter = null,
Expression<Func<T, object>> orderby = null,
bool ascending = true,
string includeProperties = "",
int pageSize = 10, int pageNumber = 1)
{
IQueryable<T> query = c.Set<T>();
if (filter != null)
{
query = query.Where(filter);
}
query = includeProperties.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries).Aggregate(query, (current, includeProp) => current.Include(includeProp));
if (orderby != null)
{
query = #ascending ? query.OrderBy(#orderby) : query.OrderByDescending(#orderby);
}
else
{
query = #ascending ? query.OrderBy(o => o.Id) : query.OrderByDescending(o => o.Id);
}
//totalPages = (int) Math.Ceiling((double)(Queryable.Count(query) / pageSize));
totalPages = 1;
if (pageSize > 0)
{
var skip = 0;
var take = pageSize;
if (pageNumber > 1)
{
skip = (pageNumber - 1) * pageSize;
take = pageSize + skip;
}
query = query.Take(take);
query = query.Skip(skip);
}
return query.ToList();
}
T is a base class inherited by my entities
I call this repository method from my service. and i call my service from my controller.
Now from my controller how do i create my orderby expression so that i can pass any column name?
What i've tried so far (found on stackoverflow):
var _OrderByProperty = typeof(Year).GetProperty("Id");
var _OrderByParameter = Expression.Parameter(typeof(Year), "x");
var _OrderByBody = Expression.Property(_OrderByParameter, _OrderByProperty.Name);
var _OrderByConverted = Expression.Convert(_OrderByBody, typeof(Object));
var _OrderByLambda = Expression.Lambda<Func<Year, object>>
(_OrderByConverted, _OrderByParameter);
var list = s.GetList(orderby: _OrderByLambda, totalPages: out totalPages, pageNumber: pageNumber, pageSize: pageSize, ascending: isAsc);
i'm getting the error
Unable to cast the type 'System.Int32' to type 'System.Object'. LINQ to Entities only supports casting EDM primitive or enumeration types.
I'm having some trouble doing aggregation on a particular column in HBase.
This is the snippet of code I tried:
Configuration config = HBaseConfiguration.create();
AggregationClient aggregationClient = new AggregationClient(config);
Scan scan = new Scan();
scan.addColumn(Bytes.toBytes("drs"), Bytes.toBytes("count"));
ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
Long sum = aggregationClient.sum(Bytes.toBytes("DEMO_CALCULATIONS"), ci , scan);
System.out.println(sum);
sum returns a value of null.
The aggregationClient API works fine if I do a rowcount.
I was trying to follow the directions in http://michaelmorello.blogspot.in/2012/01/row-count-hbase-aggregation-example.html
Could there be a problem with me using a LongColumnInterpreter when the 'count' field was an int? What am I missing in here?
You can only use long(8bytes) to do sum with default setting.
Cause in the code of AggregateImplementation's getSum method, it handle all the returned KeyValue as long.
List<KeyValue> results = new ArrayList<KeyValue>();
try {
boolean hasMoreRows = false;
do {
hasMoreRows = scanner.next(results);
for (KeyValue kv : results) {
temp = ci.getValue(colFamily, qualifier, kv);
if (temp != null)
sumVal = ci.add(sumVal, ci.castToReturnType(temp));
}
results.clear();
} while (hasMoreRows);
} finally {
scanner.close();
}
and in LongColumnInterpreter
public Long getValue(byte[] colFamily, byte[] colQualifier, KeyValue kv)
throws IOException {
if (kv == null || kv.getValueLength() != Bytes.SIZEOF_LONG)
return null;
return Bytes.toLong(kv.getBuffer(), kv.getValueOffset());
}
Im trying to write a method which will allow me to search different DataTables, over different columns.
So far i have the following:
string selectedValue;
string searchColumn;
string targetColumn;
var results = (from a in dt.AsEnumerable()
where a.Field<string>(searchColumn) == selectedValue
select new
{
targetColumn = a.Field<string>(targetColumn)
}).Distinct();
Which kind of gets the job done, but I'm left with the column name as targetColumn rather than the actual column name I want.
Is there any way to resolve this?
Thanks in advance
CM
I make a LINQ to Datatables
public List<DataRow> Where(this DataTable dt, Func<DataRow, bool> pred)
{
List<DataRow> res = new List<DataRow>();
try {
if (dt != null && dt.Rows.Count > 0) {
for (i = 0; i <= dt.Rows.Count - 1; i++) {
if (pred(dt(i))) {
res.Add(dt(i));
}
}
}
} catch (Exception ex) {
PromptMsg(ex);
}
return res;
}
Usage :
var RowsList = dt.Where(f => f("SomeField").toString() == "SomeValue" ||
f("OtherField") > 5);