blob: 690e7415801f132fa764c6885563ac6bc077e110 (
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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
// Copyright Vespa.ai. 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 java.io.PrintStream;
/**
* @author Simon Thoresen Hult
*/
public final class EchoExpression extends Expression {
private final PrintStream out;
public EchoExpression() {
this(System.out);
}
public EchoExpression(PrintStream out) {
super(UnresolvedDataType.INSTANCE);
this.out = out;
}
public PrintStream getOutputStream() {
return out;
}
@Override
protected void doExecute(ExecutionContext context) {
out.println(String.valueOf(context.getValue()));
}
@Override
protected void doVerify(VerificationContext context) {
// empty
}
@Override
public DataType createdOutputType() {
return null;
}
@Override
public String toString() {
return "echo";
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof EchoExpression)) {
return false;
}
EchoExpression rhs = (EchoExpression)obj;
if (out != rhs.out) {
return false;
}
return true;
}
@Override
public int hashCode() {
return getClass().hashCode() + out.hashCode();
}
}
|