org.apache.lucene.index.Terms#getSumTotalTermFreq ( )源码实例Demo

public WordScorer(IndexReader reader, Terms terms, String field, double realWordLikelyHood, BytesRef separator) throws IOException {
    this.field = field;
    if (terms == null) {
        throw new IllegalArgumentException("Field: [" + field + "] does not exist");
    }
    this.terms = terms;
    final long vocSize = terms.getSumTotalTermFreq();
    this.vocabluarySize =  vocSize == -1 ? reader.maxDoc() : vocSize;
    this.useTotalTermFreq = vocSize != -1;
    this.numTerms = terms.size();
    this.termsEnum = new FreqTermsEnum(reader, field, !useTotalTermFreq, useTotalTermFreq, null, BigArrays.NON_RECYCLING_INSTANCE); // non recycling for now
    this.reader = reader;
    this.realWordLikelyhood = realWordLikelyHood;
    this.separator = separator;
}
 

@Override
public FieldStats stats(Terms terms, int maxDoc) throws IOException {
    long minValue = NumericUtils.getMinLong(terms);
    long maxValue = NumericUtils.getMaxLong(terms);
    return new FieldStats.Date(
        maxDoc, terms.getDocCount(), terms.getSumDocFreq(), terms.getSumTotalTermFreq(), minValue, maxValue, dateTimeFormatter()
    );
}
 

@Override
public FieldStats stats(Terms terms, int maxDoc) throws IOException {
    long minValue = NumericUtils.getMinInt(terms);
    long maxValue = NumericUtils.getMaxInt(terms);
    return new FieldStats.Long(
        maxDoc, terms.getDocCount(), terms.getSumDocFreq(), terms.getSumTotalTermFreq(), minValue, maxValue
    );
}
 

@Override
public FieldStats stats(Terms terms, int maxDoc) throws IOException {
    float minValue = NumericUtils.sortableIntToFloat(NumericUtils.getMinInt(terms));
    float maxValue = NumericUtils.sortableIntToFloat(NumericUtils.getMaxInt(terms));
    return new FieldStats.Float(
        maxDoc, terms.getDocCount(), terms.getSumDocFreq(), terms.getSumTotalTermFreq(), minValue, maxValue
    );
}
 

@Override
public FieldStats stats(Terms terms, int maxDoc) throws IOException {
    double minValue = NumericUtils.sortableLongToDouble(NumericUtils.getMinLong(terms));
    double maxValue = NumericUtils.sortableLongToDouble(NumericUtils.getMaxLong(terms));
    return new FieldStats.Double(
        maxDoc, terms.getDocCount(), terms.getSumDocFreq(), terms.getSumTotalTermFreq(), minValue, maxValue
    );
}
 

@Override
public FieldStats stats(Terms terms, int maxDoc) throws IOException {
    long minValue = NumericUtils.getMinInt(terms);
    long maxValue = NumericUtils.getMaxInt(terms);
    return new FieldStats.Long(
        maxDoc, terms.getDocCount(), terms.getSumDocFreq(), terms.getSumTotalTermFreq(), minValue, maxValue
    );
}
 

@Override
public FieldStats stats(Terms terms, int maxDoc) throws IOException {
    long minValue = NumericUtils.getMinInt(terms);
    long maxValue = NumericUtils.getMaxInt(terms);
    return new FieldStats.Long(
        maxDoc, terms.getDocCount(), terms.getSumDocFreq(), terms.getSumTotalTermFreq(), minValue, maxValue
    );
}
 

@Override
public FieldStats stats(Terms terms, int maxDoc) throws IOException {
    long minValue = NumericUtils.getMinLong(terms);
    long maxValue = NumericUtils.getMaxLong(terms);
    return new FieldStats.Long(
        maxDoc, terms.getDocCount(), terms.getSumDocFreq(), terms.getSumTotalTermFreq(), minValue, maxValue
    );
}
 

/**
 * @return a {@link FieldStats} instance that maps to the type of this field based on the provided {@link Terms} instance.
 */
public FieldStats stats(Terms terms, int maxDoc) throws IOException {
    return new FieldStats.Text(
        maxDoc, terms.getDocCount(), terms.getSumDocFreq(), terms.getSumTotalTermFreq(), terms.getMin(), terms.getMax()
    );
}