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package org.onap.nbi.commons;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Map.Entry;
import java.util.Set;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
/**
*
*/
public class QueryParserUtils {
private QueryParserUtils() {}
/**
*
* @param queryParameters
* @return
*/
public static Set<String> getFields(MultiValueMap<String, String> queryParameters) {
Set<String> fieldSet = new HashSet<>();
if (queryParameters != null) {
// search for "all" parameter
if (queryParameters.containsKey(ReservedKeys.ALL_FIELDS)) {
queryParameters.remove(ReservedKeys.ALL_FIELDS);
fieldSet.add(ReservedKeys.ALL_FIELDS);
}
// search for "fields" parameters
List<String> queryParameterField =
queryParameters.remove(ReservedKeys.QUERY_KEY_FIELD_ESCAPE + ReservedKeys.QUERY_KEY_FIELD);
if (queryParameterField == null) {
queryParameterField = queryParameters.remove(ReservedKeys.QUERY_KEY_FIELD);
}
if (queryParameterField != null && !queryParameterField.isEmpty()) {
String queryParameterValue = queryParameterField.get(0);
if (queryParameterValue != null) {
String[] tokenArray = queryParameterValue.split(",");
fieldSet.addAll(Arrays.asList(tokenArray));
}
}
}
return fieldSet;
}
public static MultiValueMap<String, String> popCriteria(MultiValueMap<String, String> queryParameters) {
Set<Entry<String, List<String>>> entrySet = queryParameters.entrySet();
MultiValueMap<String, String> criterias = new LinkedMultiValueMap<String, String>();
entrySet.stream().forEach(entry -> {
final List<String> tempValues = new ArrayList<String>();
entry.getValue().stream().forEach(value -> tempValues.addAll(Arrays.asList(value.split(","))));
criterias.put(entry.getKey(), tempValues);
});
return criterias;
}
}
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