-
Notifications
You must be signed in to change notification settings - Fork 792
/
DocumentAttributeConverter.java
74 lines (63 loc) · 2.86 KB
/
DocumentAttributeConverter.java
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
/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package software.amazon.awssdk.enhanced.dynamodb.internal.converter.attribute;
import software.amazon.awssdk.annotations.SdkInternalApi;
import software.amazon.awssdk.enhanced.dynamodb.AttributeConverter;
import software.amazon.awssdk.enhanced.dynamodb.AttributeValueType;
import software.amazon.awssdk.enhanced.dynamodb.EnhancedType;
import software.amazon.awssdk.enhanced.dynamodb.EnhancedTypeDocumentConfiguration;
import software.amazon.awssdk.enhanced.dynamodb.TableSchema;
import software.amazon.awssdk.services.dynamodb.model.AttributeValue;
/**
* {@link AttributeConverter} for converting nested table schemas
*/
@SdkInternalApi
public class DocumentAttributeConverter<T> implements AttributeConverter<T> {
private final TableSchema<T> tableSchema;
private final EnhancedType<T> enhancedType;
private final boolean preserveEmptyObject;
private final boolean ignoreNulls;
private DocumentAttributeConverter(TableSchema<T> tableSchema,
EnhancedType<T> enhancedType) {
this.tableSchema = tableSchema;
this.enhancedType = enhancedType;
this.preserveEmptyObject = enhancedType.documentConfiguration()
.map(EnhancedTypeDocumentConfiguration::preserveEmptyObject)
.orElse(false);
this.ignoreNulls = enhancedType.documentConfiguration()
.map(EnhancedTypeDocumentConfiguration::ignoreNulls)
.orElse(false);
}
public static <T> DocumentAttributeConverter<T> create(TableSchema<T> tableSchema,
EnhancedType<T> enhancedType) {
return new DocumentAttributeConverter<>(tableSchema, enhancedType);
}
@Override
public AttributeValue transformFrom(T input) {
return AttributeValue.builder().m(tableSchema.itemToMap(input, ignoreNulls)).build();
}
@Override
public T transformTo(AttributeValue input) {
return tableSchema.mapToItem(input.m(), preserveEmptyObject);
}
@Override
public AttributeValueType attributeValueType() {
return AttributeValueType.M;
}
@Override
public EnhancedType<T> type() {
return enhancedType;
}
}