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
|
// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.grouping.request;
import java.util.List;
import java.util.stream.Collectors;
/**
* This class represents a predefined bucket-function in a {@link GroupingExpression} for expressions that evaluate to a
* raw.
*
* @author Ulf Lilleengen
*/
public class RawPredefined extends PredefinedFunction {
/**
* Constructs a new instance of this class.
*
* @param exp The expression to evaluate, must evaluate to a string.
* @param arg1 The compulsory bucket.
* @param argN The optional buckets.
*/
public RawPredefined(GroupingExpression exp, RawBucket arg1, RawBucket... argN) {
this(null, null, exp, asList(arg1, argN));
}
private RawPredefined(String label, Integer level, GroupingExpression exp, List<RawBucket> args) {
super(label, level, exp, args);
}
@Override
public RawPredefined copy() {
return new RawPredefined(getLabel(),
getLevelOrNull(),
getArg(0),
args().stream()
.skip(1)
.map(RawBucket.class::cast)
.map(arg -> arg.copy())
.toList());
}
@Override
public RawBucket getBucket(int i) {
return (RawBucket)getArg(i + 1);
}
/**
* Constructs a new instance of this class from a list of arguments.
*
* @param exp The expression to evaluate, must evaluate to a string.
* @param args The buckets to pass to the constructor.
* @return The created instance.
* @throws IllegalArgumentException Thrown if the list of buckets is empty.
*/
public static RawPredefined newInstance(GroupingExpression exp, List<RawBucket> args) {
if (args.isEmpty()) {
throw new IllegalArgumentException("Expected at least one bucket, got none.");
}
return new RawPredefined(null, null, exp, args);
}
}
|
