1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "array_attribute_combiner_dfw.h"
#include "attribute_field_writer.h"
#include "docsum_field_writer_state.h"
#include "struct_fields_resolver.h"
#include <vespa/searchcommon/attribute/iattributecontext.h>
#include <vespa/searchcommon/attribute/iattributevector.h>
#include <vespa/searchlib/common/matching_elements.h>
#include <vespa/searchlib/common/matching_elements_fields.h>
#include <vespa/vespalib/data/slime/cursor.h>
#include <vespa/vespalib/data/slime/inserter.h>
#include <vespa/vespalib/util/stash.h>
#include <algorithm>
#include <cassert>
using search::attribute::IAttributeContext;
using search::attribute::IAttributeVector;
using vespalib::slime::Cursor;
namespace search::docsummary {
namespace {
class ArrayAttributeFieldWriterState : public DocsumFieldWriterState
{
// AttributeFieldWriter instances are owned by stash passed to constructor
std::vector<AttributeFieldWriter*> _writers;
const vespalib::string& _field_name;
const MatchingElements* const _matching_elements;
public:
ArrayAttributeFieldWriterState(const std::vector<vespalib::string> &fieldNames,
const std::vector<vespalib::string> &attributeNames,
IAttributeContext &context,
vespalib::Stash& stash,
const vespalib::string &field_name,
const MatchingElements* matching_elements,
bool is_map_of_scalar);
~ArrayAttributeFieldWriterState() override;
void insert_element(uint32_t element_index, Cursor &array);
void insertField(uint32_t docId, vespalib::slime::Inserter &target) override;
};
ArrayAttributeFieldWriterState::ArrayAttributeFieldWriterState(const std::vector<vespalib::string> &fieldNames,
const std::vector<vespalib::string> &attributeNames,
IAttributeContext &context,
vespalib::Stash& stash,
const vespalib::string &field_name,
const MatchingElements *matching_elements,
bool is_map_of_scalar)
: DocsumFieldWriterState(),
_writers(),
_field_name(field_name),
_matching_elements(matching_elements)
{
size_t fields = fieldNames.size();
_writers.reserve(fields);
for (uint32_t field = 0; field < fields; ++field) {
const IAttributeVector *attr = context.getAttribute(attributeNames[field]);
if (attr != nullptr) {
_writers.emplace_back(&AttributeFieldWriter::create(fieldNames[field], *attr, stash, is_map_of_scalar));
}
}
}
ArrayAttributeFieldWriterState::~ArrayAttributeFieldWriterState() = default;
void
ArrayAttributeFieldWriterState::insert_element(uint32_t element_index, Cursor &array)
{
Cursor &obj = array.addObject();
for (auto &writer : _writers) {
writer->print(element_index, obj);
}
}
void
ArrayAttributeFieldWriterState::insertField(uint32_t docId, vespalib::slime::Inserter &target)
{
uint32_t elems = 0;
for (auto &writer : _writers) {
elems = std::max(elems, writer->fetch(docId));
}
if (elems == 0) {
return;
}
if (_matching_elements != nullptr) {
auto &elements = _matching_elements->get_matching_elements(docId, _field_name);
if (elements.empty() || elements.back() >= elems) {
return;
}
Cursor &arr = target.insertArray();
auto elements_iterator = elements.cbegin();
for (uint32_t idx = 0; idx < elems && elements_iterator != elements.cend(); ++idx) {
assert(*elements_iterator >= idx);
if (*elements_iterator == idx) {
insert_element(idx, arr);
++elements_iterator;
}
}
} else {
Cursor &arr = target.insertArray();
for (uint32_t idx = 0; idx < elems; ++idx) {
insert_element(idx, arr);
}
}
}
}
ArrayAttributeCombinerDFW::ArrayAttributeCombinerDFW(const vespalib::string &fieldName,
const StructFieldsResolver& fields_resolver,
bool filter_elements,
std::shared_ptr<MatchingElementsFields> matching_elems_fields)
: AttributeCombinerDFW(fieldName, filter_elements, std::move(matching_elems_fields)),
_fields(fields_resolver.get_array_fields()),
_attributeNames(fields_resolver.get_array_attributes()),
_is_map_of_scalar(fields_resolver.is_map_of_scalar())
{
if (filter_elements && _matching_elems_fields && !_matching_elems_fields->has_field(fieldName)) {
fields_resolver.apply_to(*_matching_elems_fields);
}
}
ArrayAttributeCombinerDFW::~ArrayAttributeCombinerDFW() = default;
DocsumFieldWriterState*
ArrayAttributeCombinerDFW::allocFieldWriterState(IAttributeContext &context, vespalib::Stash &stash, const MatchingElements* matching_elements) const
{
return &stash.create<ArrayAttributeFieldWriterState>(_fields, _attributeNames, context, stash, _fieldName, matching_elements, _is_map_of_scalar);
}
}
|
