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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/searchlib/query/weight.h>
#include <vespa/searchlib/util/rawbuf.h>
#include <vespa/vespalib/stllike/string.h>
namespace search {
/**
* Items on a simple query stack.
*
* An object of this class represents a single item
* on the simple query stack. It has a type, which corresponds
* to the different query stack execution operations. It also
* provides an arity, and the string values indexName and term, to
* accomodate the different needs of the operations.
* It also includes a mechanism for making singly linked lists
* with sub-lists. This is used during the parsing, and also
* when constructing the simple query stack.
*/
class ParseItem
{
public:
/** The type of the item is from this set of values.
It is important that these defines match those in prelude/source/com/yahoo/prelude/query/Item.java */
enum ItemType {
ITEM_OR = 0,
ITEM_AND = 1,
ITEM_NOT = 2,
ITEM_RANK = 3,
ITEM_TERM = 4,
ITEM_NUMTERM = 5,
ITEM_PHRASE = 6,
/* removed: ITEM_PAREN = 7, */
ITEM_PREFIXTERM = 8,
ITEM_SUBSTRINGTERM = 9,
ITEM_ANY = 10,
ITEM_NEAR = 11,
ITEM_ONEAR = 12,
ITEM_SUFFIXTERM = 13,
ITEM_EQUIV = 14,
ITEM_WEIGHTED_SET = 15,
ITEM_WEAK_AND = 16,
ITEM_EXACTSTRINGTERM = 17,
ITEM_SAME_ELEMENT = 18,
ITEM_PURE_WEIGHTED_STRING = 19,
ITEM_PURE_WEIGHTED_LONG = 20,
ITEM_DOT_PRODUCT = 21,
ITEM_WAND = 22,
ITEM_PREDICATE_QUERY = 23,
ITEM_REGEXP = 24,
ITEM_WORD_ALTERNATIVES = 25,
ITEM_NEAREST_NEIGHBOR = 26,
ITEM_GEO_LOCATION_TERM = 27,
ITEM_TRUE = 28,
ITEM_FALSE = 29,
ITEM_MAX = 30, // Indicates how long tables must be.
ITEM_UNDEF = 31,
};
/** A tag identifying the origin of this query node.
* Note that descendants may origin from elsewhere.
* If changes necessary:
* NB! Append at end of list - corresponding type
* used in Juniper and updates of these two types must be synchronized.
* (juniper/src/query.h)
*/
enum ItemCreator {
CREA_ORIG = 0 // Original user query
};
enum ItemFeatures {
IF_WEIGHT = 0x20, // item has rank weight
IF_UNIQUEID = 0x40, // item has unique id
IF_FLAGS = 0x80, // item has extra flags
};
enum ItemFlags {
IFLAG_NORANK = 0x00000001, // this term should not be ranked (not exposed to rank framework)
IFLAG_SPECIALTOKEN = 0x00000002,
IFLAG_NOPOSITIONDATA = 0x00000004, // we should not use position data when ranking this term
};
/** Extra information on each item (creator id) coded in bits 12-19 of _type */
static inline ItemCreator GetCreator(uint8_t type) { return static_cast<ItemCreator>((type >> 3) & 0x01); }
/** The old item type now uses only the lower 12 bits in a backward compatible way) */
static inline ItemType GetType(uint8_t type) { return static_cast<ItemType>(type & 0x1F); }
static inline bool GetFeature(uint8_t type, uint8_t feature)
{ return ((type & feature) != 0); }
static inline bool GetFeature_Weight(uint8_t type)
{ return GetFeature(type, IF_WEIGHT); }
static inline bool getFeature_UniqueId(uint8_t type)
{ return GetFeature(type, IF_UNIQUEID); }
static inline bool getFeature_Flags(uint8_t type)
{ return GetFeature(type, IF_FLAGS); }
};
} // namespace search
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