blob: 9abc6b2bdaa110f616e32e9045049c2902127651 (
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
|
// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.prelude.query;
import java.nio.ByteBuffer;
/**
* A query item which never matches. This is sometimes a useful output of query rewriting.
*
* @author bratseth
*/
public class FalseItem extends Item {
@Override
public void setIndexName(String index) { }
@Override
public ItemType getItemType() {
return ItemType.WORD; // Implemented as a non-matching word as the backend does not support FalseItem
}
@Override
public String getName() { return "FALSE"; }
/** Override to only return "FALSE" rather than "FALSE " */
@Override
protected void appendHeadingString(StringBuilder buffer) {
buffer.append(getName());
}
@Override
public int encode(ByteBuffer buffer) {
super.encodeThis(buffer);
putString(" ", buffer); // searching for space will not match
return 1;
}
@Override
public int getTermCount() { return 1; }
@Override
protected void appendBodyString(StringBuilder buffer) { }
}
|
