Example usage for org.apache.lucene.search FieldValueHitQueue create

Introduction

In this page you can find the example usage for org.apache.lucene.search FieldValueHitQueue create.

Prototype

public static <T extends FieldValueHitQueue.Entry> FieldValueHitQueue<T> create(SortField[] fields, int size) 

Source Link

Document

Creates a hit queue sorted by the given list of fields.

Usage

From source file:com.tuplejump.stargate.cassandra.IndexEntryCollector.java

License:Apache License

public IndexEntryCollector(org.apache.lucene.search.SortField[] sortFields, int maxResults) throws IOException {
    if (sortFields == null) {
        hitQueue = FieldValueHitQueue.create(
                new org.apache.lucene.search.SortField[] { org.apache.lucene.search.SortField.FIELD_SCORE },
                maxResults);/*from   w w  w. jav a 2s.  c  o  m*/
    } else {
        hitQueue = FieldValueHitQueue.create(sortFields, maxResults);
    }
    comparators = hitQueue.getComparators();
    numHits = maxResults;
    reverseMul = hitQueue.getReverseMul();

}

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From source file:com.tuplejump.stargate.lucene.IndexEntryCollector.java

License:Apache License

public IndexEntryCollector(Function function, Search search, Options options, int maxResults)
        throws IOException {
    this.options = options;
    org.apache.lucene.search.SortField[] sortFields = search.usesSorting() ? search.sort(options) : null;
    if (sortFields == null) {
        hitQueue = FieldValueHitQueue.create(
                new org.apache.lucene.search.SortField[] { org.apache.lucene.search.SortField.FIELD_SCORE },
                maxResults);//from w w  w.j  a v a  2 s.  co  m
    } else {
        hitQueue = FieldValueHitQueue.create(sortFields, maxResults);
    }
    comparators = hitQueue.getComparators();
    numHits = maxResults;
    reverseMul = hitQueue.getReverseMul();
    numericDocValueNamesToFetch = new ArrayList<>();
    binaryDocValueNamesToFetch = new ArrayList<>();
    if (function instanceof AggregateFunction) {
        AggregateFunction aggregateFunction = (AggregateFunction) function;
        List<String> groupByFields = aggregateFunction.getGroupByFields();
        List<String> aggregateFields = aggregateFunction.getAggregateFields();
        boolean abort = false;
        FieldType[] groupDocValueTypes = null;
        if (groupByFields != null) {
            groupDocValueTypes = new FieldType[groupByFields.size()];
            for (int i = 0; i < groupByFields.size(); i++) {
                String field = groupByFields.get(i).toLowerCase();
                FieldType docValType = getDocValueType(options, field);
                if (docValType == null) {
                    abort = true;
                    break;
                }
                groupDocValueTypes[i] = docValType;
            }
        }
        FieldType[] aggDocValueTypes = new FieldType[aggregateFields.size()];
        if (!abort) {
            for (int i = 0; i < aggregateFields.size(); i++) {
                String field = aggregateFields.get(i);
                FieldType docValType = getDocValueType(options, field);
                if (docValType == null) {
                    abort = true;
                    break;
                }
                aggDocValueTypes[i] = docValType;
            }
        }
        canByPassRowFetch = !abort;
        if (canByPassRowFetch) {
            if (groupByFields != null)
                addToFetch(groupByFields.iterator(), groupDocValueTypes);
            addToFetch(aggregateFields.iterator(), aggDocValueTypes);
        }
    }
}

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