blob: 13a264c09e349abf2b903f33c0bb5e7dbe75fffb (
plain) (
blame)
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
|
// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.yql;
import com.google.common.base.Predicate;
/**
* Represents a projection command which affects the output record.
*/
enum ProjectOperator implements Operator {
FIELD(ExpressionOperator.class, String.class), // FIELD expr name
RECORD(ExpressionOperator.class, String.class), // RECORD expr name
MERGE_RECORD(String.class); // MERGE_RECORD name (alias of record to merge)
private final ArgumentsTypeChecker checker;
public static Predicate<OperatorNode<? extends Operator>> IS = new Predicate<OperatorNode<? extends Operator>>() {
@Override
public boolean apply(OperatorNode<? extends Operator> input) {
return input.getOperator() instanceof ProjectOperator;
}
};
private ProjectOperator(Object... types) {
checker = TypeCheckers.make(this, types);
}
@Override
public void checkArguments(Object... args) {
checker.check(args);
}
}
|