Example usage for org.apache.lucene.util.fst BytesRefFSTEnum next

Introduction

In this page you can find the example usage for org.apache.lucene.util.fst BytesRefFSTEnum next.

Prototype

public InputOutput<T> next() throws IOException 

Source Link

Usage

From source file:org.elasticsearch.index.fielddata.plain.FSTBytesAtomicFieldData.java

License:Apache License

@Override
public BytesValues.WithOrdinals getBytesValues(boolean needsHashes) {
    assert fst != null;
    if (needsHashes) {
        if (hashes == null) {
            BytesRefFSTEnum<Long> fstEnum = new BytesRefFSTEnum<Long>(fst);
            IntArray hashes = BigArrays.newIntArray(ordinals.getMaxOrd());
            // we don't store an ord 0 in the FST since we could have an empty string in there and FST don't support
            // empty strings twice. ie. them merge fails for long output.
            hashes.set(0, new BytesRef().hashCode());
            try {
                for (long i = 1, maxOrd = ordinals.getMaxOrd(); i < maxOrd; ++i) {
                    hashes.set(i, fstEnum.next().input.hashCode());
                }//from ww w . j  a va  2s.  c  o m
                assert fstEnum.next() == null;
            } catch (IOException e) {
                // Don't use new "AssertionError("Cannot happen", e)" directly as this is a Java 1.7-only API
                final AssertionError error = new AssertionError("Cannot happen");
                error.initCause(e);
                throw error;
            }
            this.hashes = hashes;
        }
        return new HashedBytesValues(fst, ordinals.ordinals(), hashes);
    } else {
        return new BytesValues(fst, ordinals.ordinals());
    }
}

---