Example usage for org.apache.lucene.index Terms intersect

Introduction

In this page you can find the example usage for org.apache.lucene.index Terms intersect.

Prototype

public TermsEnum intersect(CompiledAutomaton compiled, final BytesRef startTerm) throws IOException 

Source Link

Document

Returns a TermsEnum that iterates over all terms and documents that are accepted by the provided CompiledAutomaton .

Usage

From source file:com.rocana.lucene.codec.v1.TestBlockPostingsFormat3.java

License:Apache License

public void assertTerms(Terms leftTerms, Terms rightTerms, boolean deep) throws Exception {
    if (leftTerms == null || rightTerms == null) {
        assertNull(leftTerms);//w ww . ja  va  2s. c o  m
        assertNull(rightTerms);
        return;
    }
    assertTermsStatistics(leftTerms, rightTerms);

    // NOTE: we don't assert hasOffsets/hasPositions/hasPayloads because they are allowed to be different

    boolean bothHavePositions = leftTerms.hasPositions() && rightTerms.hasPositions();
    TermsEnum leftTermsEnum = leftTerms.iterator();
    TermsEnum rightTermsEnum = rightTerms.iterator();
    assertTermsEnum(leftTermsEnum, rightTermsEnum, true, bothHavePositions);

    assertTermsSeeking(leftTerms, rightTerms);

    if (deep) {
        int numIntersections = atLeast(3);
        for (int i = 0; i < numIntersections; i++) {
            String re = AutomatonTestUtil.randomRegexp(random());
            CompiledAutomaton automaton = new CompiledAutomaton(new RegExp(re, RegExp.NONE).toAutomaton());
            if (automaton.type == CompiledAutomaton.AUTOMATON_TYPE.NORMAL) {
                // TODO: test start term too
                TermsEnum leftIntersection = leftTerms.intersect(automaton, null);
                TermsEnum rightIntersection = rightTerms.intersect(automaton, null);
                assertTermsEnum(leftIntersection, rightIntersection, rarely(), bothHavePositions);
            }
        }
    }
}

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