blob: b24a65e6465f002f3cbd20db1391bdf913fd9265 (
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
35
36
37
38
39
40
41
42
43
44
45
46
|
// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.indexinglanguage.expressions;
import com.yahoo.document.DataType;
import com.yahoo.document.datatypes.StringFieldValue;
/**
* @author <a href="mailto:simon@yahoo-inc.com">Simon Thoresen</a>
*/
public class ToStringExpression extends Expression {
@Override
protected void doExecute(ExecutionContext ctx) {
ctx.setValue(new StringFieldValue(String.valueOf(ctx.getValue())));
}
@Override
protected void doVerify(VerificationContext context) {
context.setValue(createdOutputType());
}
@Override
public DataType requiredInputType() {
return UnresolvedDataType.INSTANCE;
}
@Override
public DataType createdOutputType() {
return DataType.STRING;
}
@Override
public String toString() {
return "to_string";
}
@Override
public boolean equals(Object obj) {
return obj instanceof ToStringExpression;
}
@Override
public int hashCode() {
return getClass().hashCode();
}
}
|