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.search.suggest.completion.context;
import org.elasticsearch.ElasticsearchParseException;
import org.elasticsearch.common.xcontent.ToXContent;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.common.xcontent.XContentParser.Token;
import org.elasticsearch.common.xcontent.json.JsonXContent;
import org.elasticsearch.index.mapper.CompletionFieldMapper;
import org.elasticsearch.index.mapper.ParseContext;
import org.elasticsearch.index.query.QueryParseContext;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.Set;
/**
* A {@link ContextMapping} defines criteria that can be used to
* filter and/or boost suggestions at query time for {@link CompletionFieldMapper}.
*
* Implementations have to define how contexts are parsed at query/index time
*/
public abstract class ContextMapping<T extends ToXContent> implements ToXContent {
public static final String FIELD_TYPE = "type";
public static final String FIELD_NAME = "name";
protected final Type type;
protected final String name;
public enum Type {
CATEGORY, GEO;
public static Type fromString(String type) {
if (type.equalsIgnoreCase("category")) {
return CATEGORY;
} else if (type.equalsIgnoreCase("geo")) {
return GEO;
} else {
throw new IllegalArgumentException("No context type for [" + type + "]");
}
}
}
/**
* Define a new context mapping of a specific type
*
* @param type type of context mapping, either {@link Type#CATEGORY} or {@link Type#GEO}
* @param name name of context mapping
*/
protected ContextMapping(Type type, String name) {
this.type = type;
this.name = name;
}
/**
* @return the type name of the context
*/
public Type type() {
return type;
}
/**
* @return the name/id of the context
*/
public String name() {
return name;
}
/**
* Parses a set of index-time contexts.
*/
public abstract Set<CharSequence> parseContext(ParseContext parseContext, XContentParser parser) throws IOException, ElasticsearchParseException;
/**
* Retrieves a set of context from a <code>document</code> at index-time.
*/
protected abstract Set<CharSequence> parseContext(ParseContext.Document document);
/**
* Prototype for the query context
*/
protected abstract T fromXContent(QueryParseContext context) throws IOException;
/**
* Parses query contexts for this mapper
*/
public final List<InternalQueryContext> parseQueryContext(QueryParseContext context) throws IOException, ElasticsearchParseException {
List<T> queryContexts = new ArrayList<>();
XContentParser parser = context.parser();
Token token = parser.nextToken();
if (token == Token.START_ARRAY) {
while (parser.nextToken() != Token.END_ARRAY) {
queryContexts.add(fromXContent(context));
}
} else {
queryContexts.add(fromXContent(context));
}
return toInternalQueryContexts(queryContexts);
}
/**
* Convert query contexts to common representation
*/
protected abstract List<InternalQueryContext> toInternalQueryContexts(List<T> queryContexts);
/**
* Implementations should add specific configurations
* that need to be persisted
*/
protected abstract XContentBuilder toInnerXContent(XContentBuilder builder, Params params) throws IOException;
@Override
public final XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.field(FIELD_NAME, name);
builder.field(FIELD_TYPE, type.name());
toInnerXContent(builder, params);
return builder;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ContextMapping that = (ContextMapping) o;
if (type != that.type) return false;
return name.equals(that.name);
}
@Override
public int hashCode() {
return Objects.hash(type, name);
}
@Override
public String toString() {
try {
return toXContent(JsonXContent.contentBuilder(), ToXContent.EMPTY_PARAMS).string();
} catch (IOException e) {
return super.toString();
}
}
public static class InternalQueryContext {
public final String context;
public final int boost;
public final boolean isPrefix;
public InternalQueryContext(String context, int boost, boolean isPrefix) {
this.context = context;
this.boost = boost;
this.isPrefix = isPrefix;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
InternalQueryContext that = (InternalQueryContext) o;
if (boost != that.boost) return false;
if (isPrefix != that.isPrefix) return false;
return context != null ? context.equals(that.context) : that.context == null;
}
@Override
public int hashCode() {
int result = context != null ? context.hashCode() : 0;
result = 31 * result + boost;
result = 31 * result + (isPrefix ? 1 : 0);
return result;
}
@Override
public String toString() {
return "QueryContext{" +
"context='" + context + '\'' +
", boost=" + boost +
", isPrefix=" + isPrefix +
'}';
}
}
}
|
