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
|
/*
* 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.aggregations.metrics.percentiles;
import com.carrotsearch.hppc.DoubleArrayList;
import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.search.SearchParseException;
import org.elasticsearch.search.aggregations.Aggregator;
import org.elasticsearch.search.aggregations.AggregatorFactory;
import org.elasticsearch.search.aggregations.metrics.percentiles.tdigest.InternalTDigestPercentiles;
import org.elasticsearch.search.aggregations.support.ValuesSource;
import org.elasticsearch.search.aggregations.support.ValuesSource.Numeric;
import org.elasticsearch.search.aggregations.support.ValuesSourceConfig;
import org.elasticsearch.search.aggregations.support.ValuesSourceParser;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
import java.util.Arrays;
public abstract class AbstractPercentilesParser implements Aggregator.Parser {
public static final ParseField KEYED_FIELD = new ParseField("keyed");
public static final ParseField METHOD_FIELD = new ParseField("method");
public static final ParseField COMPRESSION_FIELD = new ParseField("compression");
public static final ParseField NUMBER_SIGNIFICANT_DIGITS_FIELD = new ParseField("number_of_significant_value_digits");
private boolean formattable;
public AbstractPercentilesParser(boolean formattable) {
this.formattable = formattable;
}
@Override
public AggregatorFactory parse(String aggregationName, XContentParser parser, SearchContext context) throws IOException {
ValuesSourceParser<ValuesSource.Numeric> vsParser = ValuesSourceParser.numeric(aggregationName, InternalTDigestPercentiles.TYPE, context)
.formattable(formattable).build();
double[] keys = null;
boolean keyed = true;
Double compression = null;
Integer numberOfSignificantValueDigits = null;
PercentilesMethod method = null;
XContentParser.Token token;
String currentFieldName = null;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (vsParser.token(currentFieldName, token, parser)) {
continue;
} else if (token == XContentParser.Token.START_ARRAY) {
if (context.parseFieldMatcher().match(currentFieldName, keysField())) {
DoubleArrayList values = new DoubleArrayList(10);
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
double value = parser.doubleValue();
values.add(value);
}
keys = values.toArray();
Arrays.sort(keys);
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName + "]: ["
+ currentFieldName + "].", parser.getTokenLocation());
}
} else if (token == XContentParser.Token.VALUE_BOOLEAN) {
if (context.parseFieldMatcher().match(currentFieldName, KEYED_FIELD)) {
keyed = parser.booleanValue();
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName + "]: ["
+ currentFieldName + "].", parser.getTokenLocation());
}
} else if (token == XContentParser.Token.START_OBJECT) {
if (method != null) {
throw new SearchParseException(context, "Found multiple methods in [" + aggregationName + "]: [" + currentFieldName
+ "]. only one of [" + PercentilesMethod.TDIGEST.getName() + "] and [" + PercentilesMethod.HDR.getName()
+ "] may be used.", parser.getTokenLocation());
}
method = PercentilesMethod.resolveFromName(currentFieldName);
if (method == null) {
throw new SearchParseException(context, "Unexpected token " + token + " in [" + aggregationName + "].",
parser.getTokenLocation());
} else {
switch (method) {
case TDIGEST:
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.VALUE_NUMBER) {
if (context.parseFieldMatcher().match(currentFieldName, COMPRESSION_FIELD)) {
compression = parser.doubleValue();
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName
+ "]: [" + currentFieldName + "].", parser.getTokenLocation());
}
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName + "]: ["
+ currentFieldName + "].", parser.getTokenLocation());
}
}
break;
case HDR:
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.VALUE_NUMBER) {
if (context.parseFieldMatcher().match(currentFieldName, NUMBER_SIGNIFICANT_DIGITS_FIELD)) {
numberOfSignificantValueDigits = parser.intValue();
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName
+ "]: [" + currentFieldName + "].", parser.getTokenLocation());
}
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName + "]: ["
+ currentFieldName + "].", parser.getTokenLocation());
}
}
break;
}
}
} else {
throw new SearchParseException(context, "Unexpected token " + token + " in [" + aggregationName + "].",
parser.getTokenLocation());
}
}
if (method == null) {
method = PercentilesMethod.TDIGEST;
}
switch (method) {
case TDIGEST:
if (numberOfSignificantValueDigits != null) {
throw new SearchParseException(context, "[number_of_significant_value_digits] cannot be used with method [tdigest] in ["
+ aggregationName + "].", parser.getTokenLocation());
}
if (compression == null) {
compression = 100.0;
}
break;
case HDR:
if (compression != null) {
throw new SearchParseException(context, "[compression] cannot be used with method [hdr] in [" + aggregationName + "].",
parser.getTokenLocation());
}
if (numberOfSignificantValueDigits == null) {
numberOfSignificantValueDigits = 3;
}
break;
default:
// Shouldn't get here but if we do, throw a parse exception for
// invalid method
throw new SearchParseException(context, "Unknown value for [" + currentFieldName + "] in [" + aggregationName + "]: [" + method
+ "].", parser.getTokenLocation());
}
return buildFactory(context, aggregationName, vsParser.config(), keys, method, compression,
numberOfSignificantValueDigits, keyed);
}
protected abstract AggregatorFactory buildFactory(SearchContext context, String aggregationName, ValuesSourceConfig<Numeric> config,
double[] cdfValues, PercentilesMethod method, Double compression, Integer numberOfSignificantValueDigits, boolean keyed);
protected abstract ParseField keysField();
}
|
