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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.schema;
import com.yahoo.document.Field;
import com.yahoo.documentmodel.NewDocumentReferenceDataType;
import com.yahoo.schema.document.SDDocumentType;
import com.yahoo.schema.document.SDField;
import java.util.Collection;
import java.util.Map;
import java.util.stream.Stream;
import static java.util.function.Function.identity;
import static java.util.stream.Collectors.toMap;
/**
* Resolves all document references in the search definitions
*
* Iterates through all document fields having a {@link NewDocumentReferenceDataType} and uses {@link NewDocumentReferenceDataType#getTargetTypeName()}
* to determine the referenced document. This information is aggregated into a {@link DocumentReferences} object.
*
* @author bjorncs
*/
public class DocumentReferenceResolver {
private final Map<String, Schema> schemaMapping;
public DocumentReferenceResolver(Collection<Schema> schemas) {
this.schemaMapping = createDocumentNameToSearchMapping(schemas);
}
public void resolveReferences(SDDocumentType documentType) {
var references = new DocumentReferences(createFieldToDocumentReferenceMapping(documentType));
documentType.setDocumentReferences(references);
}
public void resolveInheritedReferences(SDDocumentType documentType) {
resolveInheritedReferencesRecursive(documentType, documentType.getInheritedTypes());
}
private void resolveInheritedReferencesRecursive(SDDocumentType documentType,
Collection<SDDocumentType> inheritedTypes) {
for (var inheritedType : inheritedTypes) {
documentType.getDocumentReferences().get().mergeFrom(inheritedType.getDocumentReferences().get());
}
for (var inheritedType : inheritedTypes) {
resolveInheritedReferencesRecursive(documentType, inheritedType.getInheritedTypes());
}
}
private Map<String, DocumentReference> createFieldToDocumentReferenceMapping(SDDocumentType documentType) {
return fieldStream(documentType)
.filter(field -> field.getDataType() instanceof NewDocumentReferenceDataType)
.collect(toMap(Field::getName, this::createDocumentReference));
}
private DocumentReference createDocumentReference(Field field) {
if (!isAttribute(field)) {
throw new IllegalArgumentException(
String.format(
"The field '%s' is an invalid document reference. The field must be an attribute.",
field.getName()));
}
NewDocumentReferenceDataType reference = (NewDocumentReferenceDataType) field.getDataType();
String targetDocumentName = getTargetDocumentName(reference);
Schema schema = schemaMapping.get(targetDocumentName);
if (schema == null) {
throw new IllegalArgumentException(
String.format("Invalid document reference '%s': " +
"Could not find document type '%s'", field.getName(), targetDocumentName));
}
return new DocumentReference(field, schema);
}
private static boolean isAttribute(Field field) {
SDField sdField = (SDField) field; // Ugly, but SDDocumentType only expose the fields as the super class Field
return sdField.doesAttributing();
}
private static Map<String, Schema> createDocumentNameToSearchMapping(Collection<Schema> schemaDefintions) {
return schemaDefintions.stream()
.filter(search -> search.getDocument() != null)
.collect(toMap(search -> search.getDocument().getName(), identity()));
}
private static Stream<Field> fieldStream(SDDocumentType documentType) {
return documentType.getDocumentType().getFields().stream();
}
private static String getTargetDocumentName(NewDocumentReferenceDataType reference) {
return reference.getTargetTypeName();
}
}
|
