Examples with DoubleConstValueSource org.apache.lucene.queries.function.valuesource.DoubleConstValueSource used on opensource projects

Example 1 with DoubleConstValueSource

use of org.apache.lucene.queries.function.valuesource.DoubleConstValueSource in project lucene-solr by apache.

the class TestValueSources method testDoubleConst.

public void testDoubleConst() throws Exception {
    ValueSource vs = new DoubleConstValueSource(0.3d);
    assertHits(new FunctionQuery(vs), new float[] { 0.3f, 0.3f });
    assertAllExist(vs);
}

Example 2 with DoubleConstValueSource

use of org.apache.lucene.queries.function.valuesource.DoubleConstValueSource in project elasticsearch by elastic.

the class ExpressionScriptEngineService method search.

@Override
public SearchScript search(CompiledScript compiledScript, SearchLookup lookup, @Nullable Map<String, Object> vars) {
    Expression expr = (Expression) compiledScript.compiled();
    MapperService mapper = lookup.doc().mapperService();
    // NOTE: if we need to do anything complicated with bindings in the future, we can just extend Bindings,
    // instead of complicating SimpleBindings (which should stay simple)
    SimpleBindings bindings = new SimpleBindings();
    ReplaceableConstDoubleValueSource specialValue = null;
    boolean needsScores = false;
    for (String variable : expr.variables) {
        try {
            if (variable.equals("_score")) {
                bindings.add(new SortField("_score", SortField.Type.SCORE));
                needsScores = true;
            } else if (variable.equals("_value")) {
                specialValue = new ReplaceableConstDoubleValueSource();
                bindings.add("_value", specialValue);
            // noop: _value is special for aggregations, and is handled in ExpressionScriptBindings
            // TODO: if some uses it in a scoring expression, they will get a nasty failure when evaluating...need a
            // way to know this is for aggregations and so _value is ok to have...
            } else if (vars != null && vars.containsKey(variable)) {
                // TODO: document and/or error if vars contains _score?
                // NOTE: by checking for the variable in vars first, it allows masking document fields with a global constant,
                // but if we were to reverse it, we could provide a way to supply dynamic defaults for documents missing the field?
                Object value = vars.get(variable);
                if (value instanceof Number) {
                    bindings.add(variable, new DoubleConstValueSource(((Number) value).doubleValue()).asDoubleValuesSource());
                } else {
                    throw new ParseException("Parameter [" + variable + "] must be a numeric type", 0);
                }
            } else {
                String fieldname = null;
                String methodname = null;
                // .value is the default for doc['field'], its optional.
                String variablename = "value";
                // true if the variable is of type doc['field'].date.xxx
                boolean dateAccessor = false;
                VariableContext[] parts = VariableContext.parse(variable);
                if (parts[0].text.equals("doc") == false) {
                    throw new ParseException("Unknown variable [" + parts[0].text + "]", 0);
                }
                if (parts.length < 2 || parts[1].type != VariableContext.Type.STR_INDEX) {
                    throw new ParseException("Variable 'doc' must be used with a specific field like: doc['myfield']", 3);
                } else {
                    fieldname = parts[1].text;
                }
                if (parts.length == 3) {
                    if (parts[2].type == VariableContext.Type.METHOD) {
                        methodname = parts[2].text;
                    } else if (parts[2].type == VariableContext.Type.MEMBER) {
                        variablename = parts[2].text;
                    } else {
                        throw new IllegalArgumentException("Only member variables or member methods may be accessed on a field when not accessing the field directly");
                    }
                }
                if (parts.length > 3) {
                    // access to the .date "object" within the field
                    if (parts.length == 4 && ("date".equals(parts[2].text) || "getDate".equals(parts[2].text))) {
                        if (parts[3].type == VariableContext.Type.METHOD) {
                            methodname = parts[3].text;
                            dateAccessor = true;
                        } else if (parts[3].type == VariableContext.Type.MEMBER) {
                            variablename = parts[3].text;
                            dateAccessor = true;
                        }
                    }
                    if (!dateAccessor) {
                        throw new IllegalArgumentException("Variable [" + variable + "] does not follow an allowed format of either doc['field'] or doc['field'].method()");
                    }
                }
                MappedFieldType fieldType = mapper.fullName(fieldname);
                if (fieldType == null) {
                    throw new ParseException("Field [" + fieldname + "] does not exist in mappings", 5);
                }
                IndexFieldData<?> fieldData = lookup.doc().fieldDataService().getForField(fieldType);
                // delegate valuesource creation based on field's type
                // there are three types of "fields" to expressions, and each one has a different "api" of variables and methods.
                final ValueSource valueSource;
                if (fieldType instanceof GeoPointFieldType) {
                    // geo
                    if (methodname == null) {
                        valueSource = GeoField.getVariable(fieldData, fieldname, variablename);
                    } else {
                        valueSource = GeoField.getMethod(fieldData, fieldname, methodname);
                    }
                } else if (fieldType instanceof DateFieldMapper.DateFieldType) {
                    if (dateAccessor) {
                        // date object
                        if (methodname == null) {
                            valueSource = DateObject.getVariable(fieldData, fieldname, variablename);
                        } else {
                            valueSource = DateObject.getMethod(fieldData, fieldname, methodname);
                        }
                    } else {
                        // date field itself
                        if (methodname == null) {
                            valueSource = DateField.getVariable(fieldData, fieldname, variablename);
                        } else {
                            valueSource = DateField.getMethod(fieldData, fieldname, methodname);
                        }
                    }
                } else if (fieldData instanceof IndexNumericFieldData) {
                    // number
                    if (methodname == null) {
                        valueSource = NumericField.getVariable(fieldData, fieldname, variablename);
                    } else {
                        valueSource = NumericField.getMethod(fieldData, fieldname, methodname);
                    }
                } else {
                    throw new ParseException("Field [" + fieldname + "] must be numeric, date, or geopoint", 5);
                }
                needsScores |= valueSource.getSortField(false).needsScores();
                bindings.add(variable, valueSource.asDoubleValuesSource());
            }
        } catch (Exception e) {
            // we defer "binding" of variables until here: give context for that variable
            throw convertToScriptException("link error", expr.sourceText, variable, e);
        }
    }
    return new ExpressionSearchScript(compiledScript, bindings, specialValue, needsScores);
}

Example 3 with DoubleConstValueSource

use of org.apache.lucene.queries.function.valuesource.DoubleConstValueSource in project lucene-solr by apache.

the class TestFunctionQuerySort method testSearchAfterWhenSortingByFunctionValues.

public void testSearchAfterWhenSortingByFunctionValues() throws IOException {
    Directory dir = newDirectory();
    IndexWriterConfig iwc = newIndexWriterConfig(null);
    // depends on docid order
    iwc.setMergePolicy(newLogMergePolicy());
    RandomIndexWriter writer = new RandomIndexWriter(random(), dir, iwc);
    Document doc = new Document();
    Field field = new StoredField("value", 0);
    Field dvField = new NumericDocValuesField("value", 0);
    doc.add(field);
    doc.add(dvField);
    // Save docs unsorted (decreasing value n, n-1, ...)
    final int NUM_VALS = 5;
    for (int val = NUM_VALS; val > 0; val--) {
        field.setIntValue(val);
        dvField.setLongValue(val);
        writer.addDocument(doc);
    }
    // Open index
    IndexReader reader = writer.getReader();
    writer.close();
    IndexSearcher searcher = newSearcher(reader);
    // Trivial ValueSource function that bypasses single field ValueSource sort optimization
    ValueSource src = new SumFloatFunction(new ValueSource[] { new IntFieldSource("value"), new DoubleConstValueSource(1.0D) });
    // ...and make it a sort criterion
    SortField sf = src.getSortField(false).rewrite(searcher);
    Sort orderBy = new Sort(sf);
    // Get hits sorted by our FunctionValues (ascending values)
    Query q = new MatchAllDocsQuery();
    TopDocs hits = searcher.search(q, reader.maxDoc(), orderBy);
    assertEquals(NUM_VALS, hits.scoreDocs.length);
    // Verify that sorting works in general
    int i = 0;
    for (ScoreDoc hit : hits.scoreDocs) {
        int valueFromDoc = Integer.parseInt(reader.document(hit.doc).get("value"));
        assertEquals(++i, valueFromDoc);
    }
    // Now get hits after hit #2 using IS.searchAfter()
    int afterIdx = 1;
    FieldDoc afterHit = (FieldDoc) hits.scoreDocs[afterIdx];
    hits = searcher.searchAfter(afterHit, q, reader.maxDoc(), orderBy);
    // Expected # of hits: NUM_VALS - 2
    assertEquals(NUM_VALS - (afterIdx + 1), hits.scoreDocs.length);
    // Verify that hits are actually "after"
    int afterValue = ((Double) afterHit.fields[0]).intValue();
    for (ScoreDoc hit : hits.scoreDocs) {
        int val = Integer.parseInt(reader.document(hit.doc).get("value"));
        assertTrue(afterValue <= val);
        assertFalse(hit.doc == afterHit.doc);
    }
    reader.close();
    dir.close();
}

Example 4 with DoubleConstValueSource

use of org.apache.lucene.queries.function.valuesource.DoubleConstValueSource in project lucene-solr by apache.

the class GeoDistValueSourceParser method parsePoint.

private MultiValueSource parsePoint(FunctionQParser fp) throws SyntaxError {
    String ptStr = fp.getParam(SpatialParams.POINT);
    if (ptStr == null)
        return null;
    Point point = SpatialUtils.parsePointSolrException(ptStr, SpatialContext.GEO);
    //assume Lat Lon order
    return new VectorValueSource(Arrays.<ValueSource>asList(new DoubleConstValueSource(point.getY()), new DoubleConstValueSource(point.getX())));
}