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

Example 26 with ValueSource

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

the class SpatialFileQueryMaker method makeQueryFromShape.

protected Query makeQueryFromShape(Shape shape) {
    SpatialArgs args = new SpatialArgs(operation, shape);
    if (!Double.isNaN(distErrPct))
        args.setDistErrPct(distErrPct);
    Query filterQuery = strategy.makeQuery(args);
    if (score) {
        //wrap with distance computing query
        ValueSource valueSource = strategy.makeDistanceValueSource(shape.getCenter());
        return new BooleanQuery.Builder().add(new FunctionQuery(valueSource), //matches everything and provides score
        BooleanClause.Occur.MUST).add(filterQuery, //filters (score isn't used)
        BooleanClause.Occur.FILTER).build();
    } else {
        // assume constant scoring
        return filterQuery;
    }
}

Example 27 with ValueSource

use of org.apache.lucene.queries.function.ValueSource 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 28 with ValueSource

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

the class DummyValueSourceParser method parse.

@Override
public ValueSource parse(FunctionQParser fp) throws SyntaxError {
    ValueSource source = fp.parseValueSource();
    ValueSource result = new SimpleFloatFunction(source) {

        @Override
        protected String name() {
            return "foo";
        }

        @Override
        protected float func(int doc, FunctionValues vals) {
            float result = 0;
            return result;
        }
    };
    return result;
}

Example 29 with ValueSource

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

the class NvlValueSourceParser method parse.

@Override
public ValueSource parse(FunctionQParser fp) throws SyntaxError {
    ValueSource source = fp.parseValueSource();
    final float nvl = fp.parseFloat();
    return new SimpleFloatFunction(source) {

        @Override
        protected String name() {
            return "nvl";
        }

        @Override
        protected float func(int doc, FunctionValues vals) throws IOException {
            float v = vals.floatVal(doc);
            if (v == nvlFloatValue) {
                return nvl;
            } else {
                return v;
            }
        }
    };
}

Example 30 with ValueSource

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

the class TestOrdValues method doTestRank.

// Test that queries based on reverse/ordFieldScore scores correctly
private void doTestRank(String field, boolean inOrder) throws Exception {
    IndexReader r = DirectoryReader.open(dir);
    IndexSearcher s = newSearcher(r);
    ValueSource vs;
    if (inOrder) {
        vs = new OrdFieldSource(field);
    } else {
        vs = new ReverseOrdFieldSource(field);
    }
    Query q = new FunctionQuery(vs);
    log("test: " + q);
    QueryUtils.check(random(), q, s);
    ScoreDoc[] h = s.search(q, 1000).scoreDocs;
    assertEquals("All docs should be matched!", N_DOCS, h.length);
    String prevID = inOrder ? // greater than all ids of docs in this test ("ID0001", etc.)
    "IE" : // smaller than all ids of docs in this test ("ID0001", etc.)
    "IC";
    for (int i = 0; i < h.length; i++) {
        String resID = s.doc(h[i].doc).get(ID_FIELD);
        log(i + ".   score=" + h[i].score + "  -  " + resID);
        log(s.explain(q, h[i].doc));
        if (inOrder) {
            assertTrue("res id " + resID + " should be < prev res id " + prevID, resID.compareTo(prevID) < 0);
        } else {
            assertTrue("res id " + resID + " should be > prev res id " + prevID, resID.compareTo(prevID) > 0);
        }
        prevID = resID;
    }
    r.close();
}