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

Introduction

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

Prototype

public BytesRefFSTEnum(FST<T> fst) 

Source Link

Document

doFloor controls the behavior of advance: if it's true doFloor is true, advance positions to the biggest term before target.

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());
                }// ww w. j av  a  2 s .co  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());
    }
}

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From source file:org.meresco.lucene.numerate.FSTdict.java

License:Open Source License

public long get(String uri) throws IOException {
    if (this.fstbuilder.getTermCount() > 0L) {
        FST<Long> fst = this.fstbuilder.finish();
        if (fst != null)
            this.brfstenum = new BytesRefFSTEnum<Long>(fst);
    }/*from   w  ww. j a v a  2  s .co m*/
    InputOutput<Long> seekExact = this.brfstenum.seekExact(new BytesRef(uri));
    if (seekExact != null)
        return seekExact.output;
    return -1;
}

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