1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "data_query.h"
17
18 #include <string>
19
20 namespace OHOS {
21 namespace HiviewDFX {
22 int DataQuery::defLimit_ = 100;
DataQuery()23 DataQuery::DataQuery() : limit_(defLimit_), offset_(0) {}
24
~DataQuery()25 DataQuery::~DataQuery() {}
26
Reset()27 DataQuery& DataQuery::Reset()
28 {
29 sql_.str("");
30 orderFields_.clear();
31 limit_ = defLimit_;
32 offset_ = 0;
33 return *this;
34 }
35
Select(const std::vector<std::string> & fields)36 DOCSTORE_API DataQuery& DataQuery::Select(const std::vector<std::string>& fields)
37 {
38 selects_.insert(selects_.end(), fields.begin(), fields.end());
39 return *this;
40 }
41
StartWith(const std::string & field,const std::string & value)42 DataQuery& DataQuery::StartWith(const std::string &field, const std::string &value)
43 {
44 sql_ << "/[" << field << " re \"" << value << "\"]";
45 return *this;
46 }
47
NotStartWith(const std::string & field,const std::string & value)48 DataQuery& DataQuery::NotStartWith(const std::string &field, const std::string &value)
49 {
50 sql_ << "/[" << field << " not re \"" << value << ".*\"]";
51 return *this;
52 }
53
And()54 DataQuery& DataQuery::And()
55 {
56 sql_ << " and ";
57 return *this;
58 }
59
Or()60 DataQuery& DataQuery::Or()
61 {
62 sql_ << " or ";
63 return *this;
64 }
65
OrderByAsc(const std::string & field)66 DataQuery& DataQuery::OrderByAsc(const std::string &field)
67 {
68 orderFields_.emplace_back(std::pair<bool, std::string>(true, field));
69 return *this;
70 }
71
OrderByDesc(const std::string & field)72 DataQuery& DataQuery::OrderByDesc(const std::string &field)
73 {
74 orderFields_.emplace_back(std::pair<bool, std::string>(false, field));
75 return *this;
76 }
77
Limit(const int number,const int offset)78 DataQuery& DataQuery::Limit(const int number, const int offset)
79 {
80 limit_ = number;
81 offset_ = offset;
82 return *this;
83 }
84
BeginGroup()85 DataQuery& DataQuery::BeginGroup()
86 {
87 sql_ << "(";
88 return *this;
89 }
90
EndGroup()91 DataQuery& DataQuery::EndGroup()
92 {
93 sql_ << ")";
94 return *this;
95 }
96
ToString() const97 std::string DataQuery::ToString() const
98 {
99 std::stringstream sql;
100 sql << sql_.str();
101 if (!selects_.empty()) {
102 sql << " | ";
103 sql << "/{";
104 for (std::size_t index = 0; index < selects_.size(); index++) {
105 if (index != (selects_.size() - 1)) {
106 sql << selects_[index] << ", ";
107 } else {
108 sql << selects_[index];
109 }
110 }
111 sql << "}";
112 }
113 if (sql.str().empty()) {
114 sql << "/*";
115 }
116 sql << " |";
117 if (!orderFields_.empty()) {
118 sql << " ";
119 for (std::size_t index = 0; index < orderFields_.size(); index++) {
120 std::pair<bool, std::string> pair = orderFields_[index];
121 std::string order = pair.first ? "asc" : "desc";
122 sql << order << " /" << pair.second << " ";
123 }
124 }
125 if (offset_ > 0) {
126 sql << " skip " << offset_;
127 }
128 sql << " limit " << limit_;
129 return sql.str();
130 }
131
ToDelString(int limit) const132 std::string DataQuery::ToDelString(int limit) const
133 {
134 std::string sql = sql_.str().empty() ? "/*" : sql_.str();
135 if (limit <= 0) {
136 return sql + " | del | count";
137 } else {
138 return sql + " | del | limit " + std::to_string(limit) + " count";
139 }
140 }
141 } // HiviewDFX
142 } // OHOS