org.molgenis.api.data.v1.QueryStringParser Maven / Gradle / Ivy
package org.molgenis.api.data.v1;
import java.util.Map;
import org.molgenis.data.DataConverter;
import org.molgenis.data.Entity;
import org.molgenis.data.Query;
import org.molgenis.data.QueryRule;
import org.molgenis.data.Repository;
import org.molgenis.data.support.QueryImpl;
import org.molgenis.web.rsql.MolgenisRSQL;
/**
* Creates a Query object from a http request. Used by the RestController method that returns csv.
*
* Parameters:
*
*
q: the query
*
*
attributes: the attributes to return, if not specified returns all attributes
*
*
start: the index of the first row, default 0
*
*
num: the number of results to return, default 100, max 100000
*
*
*
*
Example: /api/v1/csv/person?q=firstName==Piet&attributes=firstName,lastName&start=10&num=100
*/
public class QueryStringParser {
private final Repository repository;
private final MolgenisRSQL molgenisRSQL;
public QueryStringParser(Repository repository, MolgenisRSQL molgenisRSQL) {
this.repository = repository;
this.molgenisRSQL = molgenisRSQL;
}
public Query parseQueryString(Map parameterMap) {
QueryImpl q = new QueryImpl<>();
for (Map.Entry entry : parameterMap.entrySet()) {
String paramName = entry.getKey();
String[] paramValues = entry.getValue();
if ((paramValues != null) && (paramValues.length > 0) && (paramValues[0] != null)) {
if (paramName.equalsIgnoreCase("num")) {
q.pageSize(DataConverter.toInt(paramValues[0]));
} else if (paramName.equalsIgnoreCase("start")) {
q.offset(DataConverter.toInt(paramValues[0]));
} else if (paramName.equalsIgnoreCase("q")) {
Query query = molgenisRSQL.createQuery(paramValues[0], repository);
for (QueryRule rule : query.getRules()) {
q.addRule(rule);
}
}
}
}
return q;
}
}