blob: 890961dd2a290427832bf67940e9d087cc6b9656 (
plain)
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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.index.query.support;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.join.BitSetProducer;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.lucene.search.Queries;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.common.xcontent.XContentHelper;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.mapper.object.ObjectMapper;
import org.elasticsearch.index.query.QueryParseContext;
import org.elasticsearch.index.query.QueryShardContext;
import org.elasticsearch.index.query.QueryShardException;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
/**
* A helper that helps with parsing inner queries of the nested query.
* 1) Takes into account that type nested path can appear before or after the inner query
* 2) Updates the {@link NestedScope} when parsing the inner query.
*/
public class NestedInnerQueryParseSupport {
protected final QueryShardContext shardContext;
protected final QueryParseContext parseContext;
private BytesReference source;
private Query innerQuery;
private Query innerFilter;
protected String path;
private boolean filterParsed = false;
private boolean queryParsed = false;
protected boolean queryFound = false;
protected boolean filterFound = false;
protected BitSetProducer parentFilter;
protected Query childFilter;
protected ObjectMapper nestedObjectMapper;
private ObjectMapper parentObjectMapper;
public NestedInnerQueryParseSupport(XContentParser parser, SearchContext searchContext) {
shardContext = searchContext.getQueryShardContext();
parseContext = shardContext.parseContext();
shardContext.reset(parser);
}
public NestedInnerQueryParseSupport(QueryShardContext context) {
this.parseContext = context.parseContext();
this.shardContext = context;
}
public void query() throws IOException {
if (path != null) {
setPathLevel();
try {
innerQuery = parseContext.parseInnerQueryBuilder().toQuery(this.shardContext);
} finally {
resetPathLevel();
}
queryParsed = true;
} else {
source = XContentFactory.smileBuilder().copyCurrentStructure(parseContext.parser()).bytes();
}
queryFound = true;
}
public void filter() throws IOException {
if (path != null) {
setPathLevel();
try {
innerFilter = parseContext.parseInnerQueryBuilder().toFilter(this.shardContext);
} finally {
resetPathLevel();
}
filterParsed = true;
} else {
source = XContentFactory.smileBuilder().copyCurrentStructure(parseContext.parser()).bytes();
}
filterFound = true;
}
public Query getInnerQuery() throws IOException {
if (queryParsed) {
return innerQuery;
} else {
if (path == null) {
throw new QueryShardException(shardContext, "[nested] requires 'path' field");
}
if (!queryFound) {
throw new QueryShardException(shardContext, "[nested] requires either 'query' or 'filter' field");
}
XContentParser old = parseContext.parser();
try {
XContentParser innerParser = XContentHelper.createParser(source);
parseContext.parser(innerParser);
setPathLevel();
try {
innerQuery = parseContext.parseInnerQueryBuilder().toQuery(this.shardContext);
} finally {
resetPathLevel();
}
queryParsed = true;
return innerQuery;
} finally {
parseContext.parser(old);
}
}
}
public Query getInnerFilter() throws IOException {
if (filterParsed) {
return innerFilter;
} else {
if (path == null) {
throw new QueryShardException(shardContext, "[nested] requires 'path' field");
}
if (!filterFound) {
throw new QueryShardException(shardContext, "[nested] requires either 'query' or 'filter' field");
}
setPathLevel();
XContentParser old = parseContext.parser();
try {
XContentParser innerParser = XContentHelper.createParser(source);
parseContext.parser(innerParser);
innerFilter = parseContext.parseInnerQueryBuilder().toFilter(this.shardContext);
filterParsed = true;
return innerFilter;
} finally {
resetPathLevel();
parseContext.parser(old);
}
}
}
public void setPath(String path) {
this.path = path;
nestedObjectMapper = shardContext.getObjectMapper(path);
if (nestedObjectMapper == null) {
throw new QueryShardException(shardContext, "[nested] failed to find nested object under path [" + path + "]");
}
if (!nestedObjectMapper.nested().isNested()) {
throw new QueryShardException(shardContext, "[nested] nested object under path [" + path + "] is not of nested type");
}
}
public String getPath() {
return path;
}
public ObjectMapper getNestedObjectMapper() {
return nestedObjectMapper;
}
public boolean queryFound() {
return queryFound;
}
public boolean filterFound() {
return filterFound;
}
public ObjectMapper getParentObjectMapper() {
return parentObjectMapper;
}
private void setPathLevel() {
ObjectMapper objectMapper = shardContext.nestedScope().getObjectMapper();
if (objectMapper == null) {
parentFilter = shardContext.bitsetFilter(Queries.newNonNestedFilter());
} else {
parentFilter = shardContext.bitsetFilter(objectMapper.nestedTypeFilter());
}
childFilter = nestedObjectMapper.nestedTypeFilter();
parentObjectMapper = shardContext.nestedScope().nextLevel(nestedObjectMapper);
}
private void resetPathLevel() {
shardContext.nestedScope().previousLevel();
}
}
|
