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The AWS Java SDK for Amazon DynamoDB module holds the client classes that are used for communicating with Amazon DynamoDB Service

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/*
 * Copyright 2016-2021 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;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Annotation to convert a {@link Boolean} to the DynamoDB {@code S} type.
 *
 * 
 * @DynamoDBConvertedBool(DynamoDBConvertedBool.Format.Y_N)
 * public boolean isTesting()
 * 
* *

The standard V1 and V2 compatible conversion schemas will, by default, * serialize booleans using the DynamoDB {@code N} type, with a value of '1' * representing 'true' and a value of '0' representing 'false'. To force the * {@code N} conversion in other schemas, *

 * @DynamoDBTyped(DynamoDBAttributeType.N)
 * public boolean isTesting()
 * 
* *

The standard V2 conversion schema will by default serialize booleans * natively using the DynamoDB {@code BOOL} type. To force the native * {@code BOOL} conversion in other schemas, *

 * @DynamoDBTyped(DynamoDBAttributeType.BOOL)
 * public boolean isTesting()
 * 
* *

May be used as a meta-annotation.

*/ @DynamoDB @DynamoDBTypeConverted(converter=DynamoDBConvertedBool.Converter.class) @DynamoDBTyped(DynamoDBMapperFieldModel.DynamoDBAttributeType.S) @Retention(RetentionPolicy.RUNTIME) @Target({ElementType.FIELD, ElementType.METHOD, ElementType.ANNOTATION_TYPE}) public @interface DynamoDBConvertedBool { /** * Enumeration of the supported format options. */ public static enum Format { true_false, T_F, Y_N }; /** * The format type for converting to and from {@link String}. */ Format value(); /** * Boolean type converter. */ static final class Converter implements DynamoDBTypeConverter { private final String valueTrue, valueFalse; public Converter(Class targetType, DynamoDBConvertedBool annotation) { this.valueTrue = annotation.value().name().split("_")[0]; this.valueFalse = annotation.value().name().split("_")[1]; } @Override public final String convert(final Boolean object) { return Boolean.TRUE.equals(object) ? valueTrue : valueFalse; } @Override public final Boolean unconvert(final String object) { return valueTrue.equals(object) ? Boolean.TRUE : Boolean.FALSE; } } }




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