Examples of org.apache.lucene.index.IndexableField.boost()

Class org.apache.lucene.index.IndexableField

Examples of org.apache.lucene.index.IndexableField.boost()

org.apache.lucene.index.IndexableField.boost()
Returns the field's index-time boost.
Only fields can have an index-time boost, if you want to simulate a "document boost", then you must pre-multiply it across all the relevant fields yourself.
The boost is used to compute the norm factor for the field. By default, in the {@link Similarity#computeNorm(FieldInvertState)} method, the boost value is multiplied by the length normalization factor and then rounded by {@link DefaultSimilarity#encodeNormValue(float)} before it is stored in theindex. One should attempt to ensure that this product does not overflow the range of that encoding.
It is illegal to return a boost other than 1.0f for a field that is not indexed ( {@link IndexableFieldType#indexed()} is false) or omits normalization values( {@link IndexableFieldType#omitNorms()} returns true). @see Similarity#computeNorm(FieldInvertState) @see DefaultSimilarity#encodeNormValue(float)

                .startObject("short_field").field("boost", 9.0).field("value", 60).endObject()
                .bytes();
        Document doc = docMapper.parse(json).rootDoc();


        IndexableField f = doc.getField("str_field");
        assertThat((double) f.boost(), closeTo(2.0, 0.001));


        f = doc.getField("int_field");
        assertThat((double) f.boost(), closeTo(3.0, 0.001));


        f = doc.getField("byte_field");

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        IndexableField f = doc.getField("str_field");
        assertThat((double) f.boost(), closeTo(2.0, 0.001));


        f = doc.getField("int_field");
        assertThat((double) f.boost(), closeTo(3.0, 0.001));


        f = doc.getField("byte_field");
        assertThat((double) f.boost(), closeTo(4.0, 0.001));


        f = doc.getField("date_field");

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        f = doc.getField("int_field");
        assertThat((double) f.boost(), closeTo(3.0, 0.001));


        f = doc.getField("byte_field");
        assertThat((double) f.boost(), closeTo(4.0, 0.001));


        f = doc.getField("date_field");
        assertThat((double) f.boost(), closeTo(5.0, 0.001));


        f = doc.getField("double_field");

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        f = doc.getField("byte_field");
        assertThat((double) f.boost(), closeTo(4.0, 0.001));


        f = doc.getField("date_field");
        assertThat((double) f.boost(), closeTo(5.0, 0.001));


        f = doc.getField("double_field");
        assertThat((double) f.boost(), closeTo(6.0, 0.001));


        f = doc.getField("float_field");

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        f = doc.getField("date_field");
        assertThat((double) f.boost(), closeTo(5.0, 0.001));


        f = doc.getField("double_field");
        assertThat((double) f.boost(), closeTo(6.0, 0.001));


        f = doc.getField("float_field");
        assertThat((double) f.boost(), closeTo(7.0, 0.001));


        f = doc.getField("long_field");

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        f = doc.getField("double_field");
        assertThat((double) f.boost(), closeTo(6.0, 0.001));


        f = doc.getField("float_field");
        assertThat((double) f.boost(), closeTo(7.0, 0.001));


        f = doc.getField("long_field");
        assertThat((double) f.boost(), closeTo(8.0, 0.001));


        f = doc.getField("short_field");

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        f = doc.getField("float_field");
        assertThat((double) f.boost(), closeTo(7.0, 0.001));


        f = doc.getField("long_field");
        assertThat((double) f.boost(), closeTo(8.0, 0.001));


        f = doc.getField("short_field");
        assertThat((double) f.boost(), closeTo(9.0, 0.001));
    }

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        f = doc.getField("long_field");
        assertThat((double) f.boost(), closeTo(8.0, 0.001));


        f = doc.getField("short_field");
        assertThat((double) f.boost(), closeTo(9.0, 0.001));
    }


    @Test
    public void testInvalidFieldLevelBoost() throws Exception {
        String mapping = XContentFactory.jsonBuilder().startObject().startObject("person").startObject("properties")

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