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
|
/*
* 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.fielddata.plain;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.FilteredTermsEnum;
import org.apache.lucene.index.LeafReader;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.Terms;
import org.apache.lucene.index.TermsEnum;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.CharsRefBuilder;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.IndexSettings;
import org.elasticsearch.index.fielddata.AtomicOrdinalsFieldData;
import org.elasticsearch.index.fielddata.FieldDataType;
import org.elasticsearch.index.fielddata.IndexFieldData.XFieldComparatorSource.Nested;
import org.elasticsearch.index.fielddata.IndexFieldDataCache;
import org.elasticsearch.index.fielddata.IndexOrdinalsFieldData;
import org.elasticsearch.index.fielddata.fieldcomparator.BytesRefFieldComparatorSource;
import org.elasticsearch.index.fielddata.ordinals.GlobalOrdinalsBuilder;
import org.elasticsearch.index.mapper.MappedFieldType.Names;
import org.elasticsearch.indices.breaker.CircuitBreakerService;
import org.elasticsearch.search.MultiValueMode;
import java.io.IOException;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public abstract class AbstractIndexOrdinalsFieldData extends AbstractIndexFieldData<AtomicOrdinalsFieldData> implements IndexOrdinalsFieldData {
protected Settings frequency;
protected Settings regex;
protected final CircuitBreakerService breakerService;
protected AbstractIndexOrdinalsFieldData(IndexSettings indexSettings, Names fieldNames, FieldDataType fieldDataType,
IndexFieldDataCache cache, CircuitBreakerService breakerService) {
super(indexSettings, fieldNames, fieldDataType, cache);
final Map<String, Settings> groups = fieldDataType.getSettings().getGroups("filter");
frequency = groups.get("frequency");
regex = groups.get("regex");
this.breakerService = breakerService;
}
@Override
public XFieldComparatorSource comparatorSource(@Nullable Object missingValue, MultiValueMode sortMode, Nested nested) {
return new BytesRefFieldComparatorSource(this, missingValue, sortMode, nested);
}
@Override
public IndexOrdinalsFieldData loadGlobal(DirectoryReader indexReader) {
if (indexReader.leaves().size() <= 1) {
// ordinals are already global
return this;
}
boolean fieldFound = false;
for (LeafReaderContext context : indexReader.leaves()) {
if (context.reader().getFieldInfos().fieldInfo(getFieldNames().indexName()) != null) {
fieldFound = true;
break;
}
}
if (fieldFound == false) {
// Some directory readers may be wrapped and report different set of fields and use the same cache key.
// If a field can't be found then it doesn't mean it isn't there,
// so if a field doesn't exist then we don't cache it and just return an empty field data instance.
// The next time the field is found, we do cache.
try {
return GlobalOrdinalsBuilder.buildEmpty(indexSettings, indexReader, this);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
try {
return cache.load(indexReader, this);
} catch (Throwable e) {
if (e instanceof ElasticsearchException) {
throw (ElasticsearchException) e;
} else {
throw new ElasticsearchException(e);
}
}
}
@Override
public IndexOrdinalsFieldData localGlobalDirect(DirectoryReader indexReader) throws Exception {
return GlobalOrdinalsBuilder.build(indexReader, this, indexSettings, breakerService, logger);
}
@Override
protected AtomicOrdinalsFieldData empty(int maxDoc) {
return AbstractAtomicOrdinalsFieldData.empty();
}
protected TermsEnum filter(Terms terms, LeafReader reader) throws IOException {
TermsEnum iterator = terms.iterator();
if (iterator == null) {
return null;
}
if (iterator != null && frequency != null) {
iterator = FrequencyFilter.filter(iterator, terms, reader, frequency);
}
if (iterator != null && regex != null) {
iterator = RegexFilter.filter(iterator, terms, reader, regex);
}
return iterator;
}
private static final class FrequencyFilter extends FilteredTermsEnum {
private int minFreq;
private int maxFreq;
public FrequencyFilter(TermsEnum delegate, int minFreq, int maxFreq) {
super(delegate, false);
this.minFreq = minFreq;
this.maxFreq = maxFreq;
}
public static TermsEnum filter(TermsEnum toFilter, Terms terms, LeafReader reader, Settings settings) throws IOException {
int docCount = terms.getDocCount();
if (docCount == -1) {
docCount = reader.maxDoc();
}
final double minFrequency = settings.getAsDouble("min", 0d);
final double maxFrequency = settings.getAsDouble("max", docCount+1d);
final double minSegmentSize = settings.getAsInt("min_segment_size", 0);
if (minSegmentSize < docCount) {
final int minFreq = minFrequency > 1.0? (int) minFrequency : (int)(docCount * minFrequency);
final int maxFreq = maxFrequency > 1.0? (int) maxFrequency : (int)(docCount * maxFrequency);
assert minFreq < maxFreq;
return new FrequencyFilter(toFilter, minFreq, maxFreq);
}
return toFilter;
}
@Override
protected AcceptStatus accept(BytesRef arg0) throws IOException {
int docFreq = docFreq();
if (docFreq >= minFreq && docFreq <= maxFreq) {
return AcceptStatus.YES;
}
return AcceptStatus.NO;
}
}
private static final class RegexFilter extends FilteredTermsEnum {
private final Matcher matcher;
private final CharsRefBuilder spare = new CharsRefBuilder();
public RegexFilter(TermsEnum delegate, Matcher matcher) {
super(delegate, false);
this.matcher = matcher;
}
public static TermsEnum filter(TermsEnum iterator, Terms terms, LeafReader reader, Settings regex) {
String pattern = regex.get("pattern");
if (pattern == null) {
return iterator;
}
Pattern p = Pattern.compile(pattern);
return new RegexFilter(iterator, p.matcher(""));
}
@Override
protected AcceptStatus accept(BytesRef arg0) throws IOException {
spare.copyUTF8Bytes(arg0);
matcher.reset(spare.get());
if (matcher.matches()) {
return AcceptStatus.YES;
}
return AcceptStatus.NO;
}
}
}
|
