Java Terms.hasPayloads方法代碼示例

import org.apache.lucene.index.Terms; //導入方法依賴的package包/類
@Override
public Query rewrite(IndexReader reader) throws IOException {
    Query rewritten = super.rewrite(reader);
    if (rewritten != this) {
        return rewritten;
    }
    boolean hasPayloads = false;
    for (LeafReaderContext context : reader.leaves()) {
        final Terms terms = context.reader().terms(term.field());
        if (terms != null) {
            if (terms.hasPayloads()) {
                hasPayloads = true;
                break;
            }
        }
    }
    // if the terms does not exist we could return a MatchNoDocsQuery but this would break the unified highlighter
    // which rewrites query with an empty reader.
    if (hasPayloads == false) {
        return new TermQuery(term);
    }
    return this;
}
 

import org.apache.lucene.index.Terms; //導入方法依賴的package包/類
private void buildValues(XContentBuilder builder, Terms curTerms, int termFreq) throws IOException {
    if (!(curTerms.hasPayloads() || curTerms.hasOffsets() || curTerms.hasPositions())) {
        return;
    }

    builder.startArray(FieldStrings.TOKENS);
    for (int i = 0; i < termFreq; i++) {
        builder.startObject();
        if (curTerms.hasPositions()) {
            builder.field(FieldStrings.POS, currentPositions[i]);
        }
        if (curTerms.hasOffsets()) {
            builder.field(FieldStrings.START_OFFSET, currentStartOffset[i]);
            builder.field(FieldStrings.END_OFFSET, currentEndOffset[i]);
        }
        if (curTerms.hasPayloads() && (currentPayloads[i].length() > 0)) {
            builder.field(FieldStrings.PAYLOAD, currentPayloads[i]);
        }
        builder.endObject();
    }
    builder.endArray();
}
 

import org.apache.lucene.index.Terms; //導入方法依賴的package包/類
private void initValues(Terms curTerms, PostingsEnum posEnum, int termFreq) throws IOException {
    for (int j = 0; j < termFreq; j++) {
        int nextPos = posEnum.nextPosition();
        if (curTerms.hasPositions()) {
            currentPositions[j] = nextPos;
        }
        if (curTerms.hasOffsets()) {
            currentStartOffset[j] = posEnum.startOffset();
            currentEndOffset[j] = posEnum.endOffset();
        }
        if (curTerms.hasPayloads()) {
            BytesRef curPayload = posEnum.getPayload();
            if (curPayload != null) {
                currentPayloads[j] = new BytesArray(curPayload.bytes, 0, curPayload.length);
            } else {
                currentPayloads[j] = null;
            }
        }
    }
}
 

import org.apache.lucene.index.Terms; //導入方法依賴的package包/類
static CodecReader wrap(CodecReader reader) throws IOException {
    final FieldInfos fieldInfos = reader.getFieldInfos();
    final FieldInfo versionInfo = fieldInfos.fieldInfo(VersionFieldMapper.NAME);
    if (versionInfo != null && versionInfo.getDocValuesType() != DocValuesType.NONE) {
        // the reader is a recent one, it has versions and they are stored
        // in a numeric doc values field
        return reader;
    }
    // The segment is an old one, look at the _uid field
    final Terms terms = reader.terms(UidFieldMapper.NAME);
    if (terms == null || !terms.hasPayloads()) {
        // The segment doesn't have an _uid field or doesn't have payloads
        // don't try to do anything clever. If any other segment has versions
        // all versions of this segment will be initialized to 0
        return reader;
    }
    // convert _uid payloads -> _version docvalues
    return new VersionFieldUpgrader(reader);
}
 

import org.apache.lucene.index.Terms; //導入方法依賴的package包/類
private void initMemory(Terms curTerms, int termFreq) {
    // init memory for performance reasons
    if (curTerms.hasPositions()) {
        currentPositions = ArrayUtil.grow(currentPositions, termFreq);
    }
    if (curTerms.hasOffsets()) {
        currentStartOffset = ArrayUtil.grow(currentStartOffset, termFreq);
        currentEndOffset = ArrayUtil.grow(currentEndOffset, termFreq);
    }
    if (curTerms.hasPayloads()) {
        currentPayloads = new BytesArray[termFreq];
    }
}