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
65
66
67
68
69
70
71
72
73
|
// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.config;
import com.yahoo.config.codegen.CNode;
import com.yahoo.config.codegen.InnerCNode;
import com.yahoo.config.codegen.LeafCNode;
import com.yahoo.slime.*;
/**
* Applies default values of a given config definition to a slime payload.
* TODO: Support giving correct type of default values
*
* @author Ulf Lilleengen
*/
public class DefaultValueApplier {
public Slime applyDefaults(Slime slime, InnerCNode def) {
applyDefaultsRecursive(slime.get(), def);
return slime;
}
private void applyDefaultsRecursive(Cursor cursor, InnerCNode def) {
if (def.isArray) {
applyDefaultsToArray(cursor, def);
} else if (def.isMap) {
applyDefaultsToMap(cursor, def);
} else {
applyDefaultsToObject(cursor, def);
}
}
private void applyDefaultsToMap(final Cursor cursor, final InnerCNode def) {
cursor.traverse((ObjectTraverser) (name, inspector) -> applyDefaultsToObject(cursor.field(name), def));
}
private void applyDefaultsToArray(final Cursor cursor, final InnerCNode def) {
cursor.traverse((ArrayTraverser) (idx, inspector) -> applyDefaultsToObject(cursor.entry(idx), def));
}
private void applyDefaultsToObject(Cursor cursor, InnerCNode def) {
for (CNode child : def.getChildren()) {
Cursor childCursor = cursor.field(child.getName());
if (isLeafNode(child) && canApplyDefault(childCursor, child)) {
applyDefaultToLeaf(cursor, child);
} else if (isInnerNode(child)) {
if (!childCursor.valid()) {
if (child.isArray) {
childCursor = cursor.setArray(child.getName());
} else {
childCursor = cursor.setObject(child.getName());
}
}
applyDefaultsRecursive(childCursor, (InnerCNode) child);
}
}
}
private boolean isInnerNode(CNode child) {
return child instanceof InnerCNode;
}
private boolean isLeafNode(CNode child) {
return child instanceof LeafCNode;
}
private void applyDefaultToLeaf(Cursor cursor, CNode child) {
cursor.setString(child.getName(), ((LeafCNode) child).getDefaultValue().getValue());
}
private boolean canApplyDefault(Cursor cursor, CNode child) {
return !cursor.valid() && ((LeafCNode) child).getDefaultValue() != null;
}
}
|
