Package org.apache.solr.schema

Class RankField

java.lang.Object

org.apache.solr.schema.FieldProperties

org.apache.solr.schema.FieldType

org.apache.solr.schema.RankField

public class RankField
extends FieldType

RankFields can be used to store scoring factors to improve document ranking. They should be used in combination with RankQParserPlugin. To use:

Define the RankField fieldType in your schema:

 <fieldType name="rank" class="solr.RankField" />
 

Add fields to the schema, i.e.:

 <field name="pagerank" type="rank" />
 

Query using the RankQParserPlugin, for example

 http://localhost:8983/solr/techproducts?q=memory _query_:{!rank f='pagerank', function='log' scalingFactor='1.2'}
 

Since:

8.6

See Also:

• RankQParserPlugin

WARNING: This API is experimental and might change in incompatible ways in the next release.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.solr.schema.FieldType

FieldType.DefaultAnalyzer, FieldType.MultiValueSelector

Field Summary

Fields

Modifier and Type	Field	Description
static final String	INTERNAL_RANK_FIELD_NAME

Fields inherited from class org.apache.solr.schema.FieldType

ANALYZER, args, AUTO_GENERATE_PHRASE_QUERIES, CHAR_FILTER, CHAR_FILTERS, CLASS_NAME, docValuesFormat, ENABLE_GRAPH_QUERIES, falseProperties, FILTER, FILTERS, INDEX, INDEX_ANALYZER, MULTI_TERM, MULTI_TERM_ANALYZER, POLY_FIELD_SEPARATOR, postingsFormat, properties, QUERY, QUERY_ANALYZER, similarity, SIMILARITY, similarityFactory, SYNONYM_QUERY_STYLE, TOKENIZER, trueProperties, TYPE, TYPE_NAME, typeName

Fields inherited from class org.apache.solr.schema.FieldProperties

BINARY, DOC_VALUES, INDEXED, LARGE_FIELD, MULTIVALUED, OMIT_NORMS, OMIT_POSITIONS, OMIT_TF_POSITIONS, REQUIRED, SORT_MISSING_FIRST, SORT_MISSING_LAST, STORE_OFFSETS, STORE_TERMOFFSETS, STORE_TERMPAYLOADS, STORE_TERMPOSITIONS, STORE_TERMVECTORS, STORED, TOKENIZED, UNINVERTIBLE, USE_DOCVALUES_AS_STORED

Constructor Summary

Constructors

Constructor	Description
RankField()

Method Summary

Modifier and Type	Method	Description
protected org.apache.lucene.index.IndexableField	createField(String name, String val, org.apache.lucene.index.IndexableFieldType type)	Create the field from native Lucene parts.
org.apache.lucene.search.Query	getExistenceQuery(QParser parser, SchemaField field)	Returns a Query instance for doing existence searches for a field.
org.apache.lucene.search.Query	getFieldQuery(QParser parser, SchemaField field, String externalVal)	Returns a Query instance for doing searches against a field.
org.apache.lucene.search.SortField	getSortField(SchemaField field, boolean top)	Returns the SortField instance that should be used to sort fields of this type.
protected org.apache.lucene.search.Query	getSpecializedRangeQuery(QParser parser, SchemaField field, String part1, String part2, boolean minInclusive, boolean maxInclusive)	Returns a Query instance for doing range searches on this field type.
UninvertingReader.Type	getUninversionType(SchemaField sf)	If DocValues is not enabled for a field, but it's indexed, docvalues can be constructed on the fly (uninverted, aka fieldcache) on the first request to sort, facet, etc.
protected void	init(IndexSchema schema, Map<String,String> args)	subclasses should initialize themselves with the args provided and remove valid arguments.
void	write(TextResponseWriter writer, String name, org.apache.lucene.index.IndexableField f)	calls back to TextResponseWriter to write the field value

Methods inherited from class org.apache.solr.schema.FieldType

checkSchemaField, checkSupportsDocValues, createField, createFields, enableDocValuesByDefault, getAnalyzerProperties, getClassArg, getDefaultMultiValueSelectorForSort, getDocValuesFormat, getFieldTermQuery, getIndexAnalyzer, getNamedPropertyValues, getNonFieldPropertyArgs, getNumberType, getNumericSort, getPostingsFormat, getPrefixQuery, getQueryAnalyzer, getRangeQuery, getRewriteMethod, getSetQuery, getSimilarity, getSimilarityFactory, getSingleValueSource, getSortedNumericSortField, getSortedSetSortField, getSortField, getSpecializedExistenceQuery, getStringSort, getTypeName, getValueSource, hasProperty, indexedToReadable, indexedToReadable, isExplicitAnalyzer, isExplicitQueryAnalyzer, isMultiValued, isPointField, isPolyField, isTokenized, isUtf8Field, marshalBase64SortValue, marshalSortValue, marshalStringSortValue, multiValuedFieldCache, readableToIndexed, readableToIndexed, restrictProps, setArgs, setIndexAnalyzer, setIsExplicitAnalyzer, setIsExplicitQueryAnalyzer, setQueryAnalyzer, setSimilarity, storedToIndexed, storedToReadable, supportsAnalyzers, toExternal, toInternal, toNativeType, toObject, toObject, toString, treatUnboundedRangeAsExistence, unmarshalBase64SortValue, unmarshalSortValue, unmarshalStringSortValue, useDocValuesAsStored, write

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

INTERNAL_RANK_FIELD_NAME

public static final String INTERNAL_RANK_FIELD_NAME

See Also:

• Constant Field Values

Constructor Details

RankField

public RankField()

Method Details

getUninversionType

public UninvertingReader.Type getUninversionType(SchemaField sf)

Description copied from class: FieldType

If DocValues is not enabled for a field, but it's indexed, docvalues can be constructed on the fly (uninverted, aka fieldcache) on the first request to sort, facet, etc. This specifies the structure to use.

This method will not be used if the field is (effectively) uninvertible="false"

Specified by:

getUninversionType in class FieldType

Parameters:

sf - field instance

Returns:

type to uninvert, or null (to disallow uninversion for the field)

See Also:

• SchemaField.isUninvertible()

write

public void write(TextResponseWriter writer,
 String name,
 org.apache.lucene.index.IndexableField f)
           throws IOException

Description copied from class: FieldType

calls back to TextResponseWriter to write the field value

Sub-classes should prefer using FieldType.toExternal(IndexableField) or FieldType.toObject(IndexableField) to get the writeable external value of f instead of directly using f.stringValue() or f.binaryValue()

Specified by:

write in class FieldType

Throws:

IOException

init

protected void init(IndexSchema schema,
 Map<String,String> args)

Description copied from class: FieldType

subclasses should initialize themselves with the args provided and remove valid arguments. leftover arguments will cause an exception. Common boolean properties have already been handled.

Overrides:

init in class FieldType

createField

protected org.apache.lucene.index.IndexableField createField(String name,
 String val,
 org.apache.lucene.index.IndexableFieldType type)

Description copied from class: FieldType

Create the field from native Lucene parts. Mostly intended for use by FieldTypes outputing multiple Fields per SchemaField

Overrides:

createField in class FieldType

Parameters:

name - The name of the field

val - The _internal_ value to index

type - FieldType

Returns:

the IndexableField.

getExistenceQuery

public org.apache.lucene.search.Query getExistenceQuery(QParser parser,
 SchemaField field)

Description copied from class: FieldType

Returns a Query instance for doing existence searches for a field. If the field does not have docValues or norms, this method will call FieldType.getSpecializedExistenceQuery(org.apache.solr.search.QParser, org.apache.solr.schema.SchemaField), which defaults to an unbounded rangeQuery.

This method should only be overridden whenever a fieldType does not support FieldExistsQuery. If a fieldType does not support an unbounded rangeQuery as an existenceQuery (such as double or float fields), FieldType.getSpecializedExistenceQuery(org.apache.solr.search.QParser, org.apache.solr.schema.SchemaField) should be overridden.

Overrides:

getExistenceQuery in class FieldType

Parameters:

parser - The QParser calling the method

field - The SchemaField of the field to search

Returns:

The Query instance.

getFieldQuery

public org.apache.lucene.search.Query getFieldQuery(QParser parser,
 SchemaField field,
 String externalVal)

Description copied from class: FieldType

Returns a Query instance for doing searches against a field.

Overrides:

getFieldQuery in class FieldType

Parameters:

parser - The QParser calling the method

field - The SchemaField of the field to search

externalVal - The String representation of the value to search

Returns:

The Query instance. This implementation returns a TermQuery but overriding queries may not

getSpecializedRangeQuery

protected org.apache.lucene.search.Query getSpecializedRangeQuery(QParser parser,
 SchemaField field,
 String part1,
 String part2,
 boolean minInclusive,
 boolean maxInclusive)

Description copied from class: FieldType

Returns a Query instance for doing range searches on this field type. SolrQueryParser currently passes part1 and part2 as null if they are '*' respectively. minInclusive and maxInclusive are both true currently by SolrQueryParser but that may change in the future. Also, other QueryParser implementations may have different semantics.

Sub-classes should override this method to provide their own range query implementation. They should strive to handle nulls in part1 and/or part2 as well as unequal minInclusive and maxInclusive parameters gracefully.

This method does not, and should not, check for or handle existence queries, please look at FieldType.getRangeQuery(org.apache.solr.search.QParser, org.apache.solr.schema.SchemaField, java.lang.String, java.lang.String, boolean, boolean) for that logic.

Overrides:

getSpecializedRangeQuery in class FieldType

Parameters:

parser - the QParser calling the method

field - the schema field

part1 - the lower boundary of the range, nulls are allowed.

part2 - the upper boundary of the range, nulls are allowed

minInclusive - whether the minimum of the range is inclusive or not

maxInclusive - whether the maximum of the range is inclusive or not

Returns:

a Query instance to perform range search according to given parameters

getSortField

public org.apache.lucene.search.SortField getSortField(SchemaField field,
 boolean top)

Description copied from class: FieldType

Returns the SortField instance that should be used to sort fields of this type.

Specified by:

getSortField in class FieldType

See Also:

• SchemaField.checkSortability()
• FieldType.getStringSort(org.apache.solr.schema.SchemaField, boolean)
• FieldType.getNumericSort(org.apache.solr.schema.SchemaField, org.apache.solr.schema.NumberType, boolean)