com.amazonaws.services.dynamodbv2.datamodeling.marshallers.BooleanSetToNumberSetMarshaller Maven / Gradle / Ivy
/*
* Copyright 2014-2021 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.
* You may obtain a copy of the License at:
*
* http://aws.amazon.com/apache2.0
*
* 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 com.amazonaws.services.dynamodbv2.datamodeling.marshallers;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import com.amazonaws.services.dynamodbv2.datamodeling.ArgumentMarshaller.NumberSetAttributeMarshaller;
import com.amazonaws.services.dynamodbv2.model.AttributeValue;
/**
* A legacy marshaller that marshals sets of Java {@code Booleans} into DynamoDB
* NumberSets, representing {@code true} as '1' and {@code false} as '0'.
* Retained for backwards compatibility with older versions of the mapper which
* don't know about the DynamoDB BOOL type.
*/
public class BooleanSetToNumberSetMarshaller
implements NumberSetAttributeMarshaller {
private static final BooleanSetToNumberSetMarshaller INSTANCE =
new BooleanSetToNumberSetMarshaller();
public static BooleanSetToNumberSetMarshaller instance() {
return INSTANCE;
}
private BooleanSetToNumberSetMarshaller() {
}
@Override
public AttributeValue marshall(Object obj) {
@SuppressWarnings("unchecked")
Set booleans = (Set) obj;
List booleanAttributes = new ArrayList(booleans.size());
for (Boolean b : booleans) {
if (b == null || b == false) {
booleanAttributes.add("0");
} else {
booleanAttributes.add("1");
}
}
return new AttributeValue().withNS(booleanAttributes);
}
}