software.amazon.awssdk.enhanced.dynamodb.internal.converter.attribute.EnhancedAttributeValue Maven / Gradle / Ivy
/*
* 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 java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import software.amazon.awssdk.annotations.Immutable;
import software.amazon.awssdk.annotations.SdkInternalApi;
import software.amazon.awssdk.annotations.ThreadSafe;
import software.amazon.awssdk.core.SdkBytes;
import software.amazon.awssdk.core.util.SdkAutoConstructMap;
import software.amazon.awssdk.enhanced.dynamodb.AttributeConverter;
import software.amazon.awssdk.enhanced.dynamodb.AttributeValueType;
import software.amazon.awssdk.enhanced.dynamodb.internal.converter.TypeConvertingVisitor;
import software.amazon.awssdk.services.dynamodb.model.AttributeValue;
import software.amazon.awssdk.utils.ToString;
import software.amazon.awssdk.utils.Validate;
/**
* A simpler, and more user-friendly version of the generated {@link AttributeValue}.
*
*
* This is a union type of the types exposed by DynamoDB, exactly as they're exposed by DynamoDB.
*
*
* An instance of {@link EnhancedAttributeValue} represents exactly one DynamoDB type, like String (s), Number (n) or Bytes (b).
* This type can be determined with the {@link #type()} method or the {@code is*} methods like {@link #isString()} or
* {@link #isNumber()}. Once the type is known, the value can be extracted with {@code as*} methods like {@link #asString()}
* or {@link #asNumber()}.
*
*
* When converting an {@link EnhancedAttributeValue} into a concrete Java type, it can be tedious to use the {@link #type()} or
* {@code is*} methods. For this reason, a {@link #convert(TypeConvertingVisitor)} method is provided that exposes a polymorphic
* way of converting a value into another type.
*
*
* An instance of {@link EnhancedAttributeValue} is created with the {@code from*} methods, like {@link #fromString(String)} or
* {@link #fromNumber(String)}.
*/
@SdkInternalApi
@ThreadSafe
@Immutable
public final class EnhancedAttributeValue {
private final AttributeValueType type;
private final boolean isNull;
private final Map mapValue;
private final String stringValue;
private final String numberValue;
private final SdkBytes bytesValue;
private final Boolean booleanValue;
private final List setOfStringsValue;
private final List setOfNumbersValue;
private final List setOfBytesValue;
private final List listOfAttributeValuesValue;
private EnhancedAttributeValue(InternalBuilder builder) {
this.type = builder.type;
this.isNull = builder.isNull;
this.stringValue = builder.stringValue;
this.numberValue = builder.numberValue;
this.bytesValue = builder.bytesValue;
this.booleanValue = builder.booleanValue;
this.mapValue = builder.mapValue == null ? null
: Collections.unmodifiableMap(builder.mapValue);
this.setOfStringsValue = builder.setOfStringsValue == null
? null : Collections.unmodifiableList(builder.setOfStringsValue);
this.setOfNumbersValue = builder.setOfNumbersValue == null
? null : Collections.unmodifiableList(builder.setOfNumbersValue);
this.setOfBytesValue = builder.setOfBytesValue == null
? null : Collections.unmodifiableList(builder.setOfBytesValue);
this.listOfAttributeValuesValue = builder.listOfAttributeValuesValue == null
? null : Collections.unmodifiableList(builder.listOfAttributeValuesValue);
}
/**
* Create an {@link EnhancedAttributeValue} for the null DynamoDB type.
*
*
* Equivalent to: {@code EnhancedAttributeValue.fromGeneratedAttributeValue(AttributeValue.builder().nul(true).build())}
*
*
* This call should never fail with an {@link Exception}.
*/
public static EnhancedAttributeValue nullValue() {
return new InternalBuilder().isNull().build();
}
/**
* Create an {@link EnhancedAttributeValue} for a map (m) DynamoDB type.
*
*
* Equivalent to: {@code EnhancedAttributeValue.fromGeneratedAttributeValue(AttributeValue.builder().m(...).build())}
*
*
* This call will fail with a {@link RuntimeException} if the provided map is null or has null keys.
*/
public static EnhancedAttributeValue fromMap(Map mapValue) {
Validate.paramNotNull(mapValue, "mapValue");
Validate.noNullElements(mapValue.keySet(), "Map must not have null keys.");
return new InternalBuilder().mapValue(mapValue).build();
}
/**
* Create an {@link EnhancedAttributeValue} for a string (s) DynamoDB type.
*
*
* Equivalent to: {@code EnhancedAttributeValue.fromGeneratedAttributeValue(AttributeValue.builder().s(...).build())}
*
*
* This call will fail with a {@link RuntimeException} if the provided value is null. Use {@link #nullValue()} for
* null values.
*/
public static EnhancedAttributeValue fromString(String stringValue) {
Validate.paramNotNull(stringValue, "stringValue");
return new InternalBuilder().stringValue(stringValue).build();
}
/**
* Create an {@link EnhancedAttributeValue} for a number (n) DynamoDB type.
*
*
* This is a String, because it matches the underlying DynamoDB representation.
*
*
* Equivalent to: {@code EnhancedAttributeValue.fromGeneratedAttributeValue(AttributeValue.builder().n(...).build())}
*
*
* This call will fail with a {@link RuntimeException} if the provided value is null. Use {@link #nullValue()} for
* null values.
*/
public static EnhancedAttributeValue fromNumber(String numberValue) {
Validate.paramNotNull(numberValue, "numberValue");
return new InternalBuilder().numberValue(numberValue).build();
}
/**
* Create an {@link EnhancedAttributeValue} for a bytes (b) DynamoDB type.
*
*
* Equivalent to: {@code EnhancedAttributeValue.fromGeneratedAttributeValue(AttributeValue.builder().b(...).build())}
*
*
* This call will fail with a {@link RuntimeException} if the provided value is null. Use {@link #nullValue()} for
* null values.
*/
public static EnhancedAttributeValue fromBytes(SdkBytes bytesValue) {
Validate.paramNotNull(bytesValue, "bytesValue");
return new InternalBuilder().bytesValue(bytesValue).build();
}
/**
* Create an {@link EnhancedAttributeValue} for a boolean (bool) DynamoDB type.
*
*
* Equivalent to: {@code EnhancedAttributeValue.fromGeneratedAttributeValue(AttributeValue.builder().bool(...).build())}
*
*
* This call will fail with a {@link RuntimeException} if the provided value is null. Use {@link #nullValue()} for
* null values.
*/
public static EnhancedAttributeValue fromBoolean(Boolean booleanValue) {
Validate.paramNotNull(booleanValue, "booleanValue");
return new InternalBuilder().booleanValue(booleanValue).build();
}
/**
* Create an {@link EnhancedAttributeValue} for a set-of-strings (ss) DynamoDB type.
*
*
* Equivalent to: {@code EnhancedAttributeValue.fromGeneratedAttributeValue(AttributeValue.builder().ss(...).build())}
*
*
* This call will fail with a {@link RuntimeException} if the provided value is null or contains a null value. Use
* {@link #fromListOfAttributeValues(List)} for null values. This will not validate that there are no
* duplicate values.
*/
public static EnhancedAttributeValue fromSetOfStrings(String... setOfStringsValue) {
Validate.paramNotNull(setOfStringsValue, "setOfStringsValue");
return fromSetOfStrings(Arrays.asList(setOfStringsValue));
}
/**
* Create an {@link EnhancedAttributeValue} for a set-of-strings (ss) DynamoDB type.
*
*
* Equivalent to: {@code EnhancedAttributeValue.fromGeneratedAttributeValue(AttributeValue.builder().ss(...).build())}
*
*
* This call will fail with a {@link RuntimeException} if the provided value is null or contains a null value. Use
* {@link #fromListOfAttributeValues(List)} for null values. This will not validate that there are no
* duplicate values.
*/
public static EnhancedAttributeValue fromSetOfStrings(List setOfStringsValue) {
Validate.paramNotNull(setOfStringsValue, "setOfStringsValue");
Validate.noNullElements(setOfStringsValue, "Set must not have null values.");
return new InternalBuilder().setOfStringsValue(setOfStringsValue).build();
}
/**
* Create an {@link EnhancedAttributeValue} for a set-of-numbers (ns) DynamoDB type.
*
*
* Equivalent to: {@code EnhancedAttributeValue.fromGeneratedAttributeValue(AttributeValue.builder().ns(...).build())}
*
*
* This call will fail with a {@link RuntimeException} if the provided value is null or contains a null value. Use
* {@link #fromListOfAttributeValues(List)} for null values. This will not validate that there are no
* duplicate values.
*/
public static EnhancedAttributeValue fromSetOfNumbers(String... setOfNumbersValue) {
Validate.paramNotNull(setOfNumbersValue, "setOfNumbersValue");
return fromSetOfNumbers(Arrays.asList(setOfNumbersValue));
}
/**
* Create an {@link EnhancedAttributeValue} for a set-of-numbers (ns) DynamoDB type.
*
*
* Equivalent to: {@code EnhancedAttributeValue.fromGeneratedAttributeValue(AttributeValue.builder().ns(...).build())}
*
*
* This call will fail with a {@link RuntimeException} if the provided value is null or contains a null value. Use
* {@link #fromListOfAttributeValues(List)} for null values. This will not validate that there are no
* duplicate values.
*/
public static EnhancedAttributeValue fromSetOfNumbers(List setOfNumbersValue) {
Validate.paramNotNull(setOfNumbersValue, "setOfNumbersValue");
Validate.noNullElements(setOfNumbersValue, "Set must not have null values.");
return new InternalBuilder().setOfNumbersValue(setOfNumbersValue).build();
}
/**
* Create an {@link EnhancedAttributeValue} for a set-of-bytes (bs) DynamoDB type.
*
*
* Equivalent to: {@code EnhancedAttributeValue.fromGeneratedAttributeValue(AttributeValue.builder().bs(...).build())}
*
*
* This call will fail with a {@link RuntimeException} if the provided value is null or contains a null value. Use
* {@link #fromListOfAttributeValues(List)} for null values. This will not validate that there are no
* duplicate values.
*/
public static EnhancedAttributeValue fromSetOfBytes(SdkBytes... setOfBytesValue) {
Validate.paramNotNull(setOfBytesValue, "setOfBytesValue");
return fromSetOfBytes(Arrays.asList(setOfBytesValue));
}
/**
* Create an {@link EnhancedAttributeValue} for a set-of-bytes (bs) DynamoDB type.
*
*
* Equivalent to: {@code EnhancedAttributeValue.fromGeneratedAttributeValue(AttributeValue.builder().bs(...).build())}
*
*
* This call will fail with a {@link RuntimeException} if the provided value is null or contains a null value. Use
* {@link #fromListOfAttributeValues(List)} for null values. This will not validate that there are no
* duplicate values.
*/
public static EnhancedAttributeValue fromSetOfBytes(List setOfBytesValue) {
Validate.paramNotNull(setOfBytesValue, "setOfBytesValue");
Validate.noNullElements(setOfBytesValue, "Set must not have null values.");
return new InternalBuilder().setOfBytesValue(setOfBytesValue).build();
}
/**
* Create an {@link EnhancedAttributeValue} for a list-of-attributes (l) DynamoDB type.
*
*
* Equivalent to: {@code EnhancedAttributeValue.fromGeneratedAttributeValue(AttributeValue.builder().l(...).build())}
*
*
* This call will fail with a {@link RuntimeException} if the provided value is null or contains a null value. Use
* {@link #nullValue()} for null values.
*/
public static EnhancedAttributeValue fromListOfAttributeValues(AttributeValue... listOfAttributeValuesValue) {
Validate.paramNotNull(listOfAttributeValuesValue, "listOfAttributeValuesValue");
return fromListOfAttributeValues(Arrays.asList(listOfAttributeValuesValue));
}
/**
* Create an {@link EnhancedAttributeValue} for a list-of-attributes (l) DynamoDB type.
*
*
* Equivalent to: {@code EnhancedAttributeValue.fromGeneratedAttributeValue(AttributeValue.builder().l(...).build())}
*
*
* This call will fail with a {@link RuntimeException} if the provided value is null or contains a null value. Use
* {@link #nullValue()} for null values.
*/
public static EnhancedAttributeValue fromListOfAttributeValues(List listOfAttributeValuesValue) {
Validate.paramNotNull(listOfAttributeValuesValue, "listOfAttributeValuesValue");
Validate.noNullElements(listOfAttributeValuesValue, "List must not have null values.");
return new InternalBuilder().listOfAttributeValuesValue(listOfAttributeValuesValue).build();
}
/**
* Create an {@link EnhancedAttributeValue} from a generated {@link AttributeValue}.
*
*
* This call will fail with a {@link RuntimeException} if the provided value is null ({@link AttributeValue#nul()} is okay).
*/
public static EnhancedAttributeValue fromAttributeValue(AttributeValue attributeValue) {
Validate.notNull(attributeValue, "Generated attribute value must not contain null values. " +
"Use AttributeValue#nul() instead.");
if (attributeValue.s() != null) {
return EnhancedAttributeValue.fromString(attributeValue.s());
}
if (attributeValue.n() != null) {
return EnhancedAttributeValue.fromNumber(attributeValue.n());
}
if (attributeValue.bool() != null) {
return EnhancedAttributeValue.fromBoolean(attributeValue.bool());
}
if (Boolean.TRUE.equals(attributeValue.nul())) {
return EnhancedAttributeValue.nullValue();
}
if (attributeValue.b() != null) {
return EnhancedAttributeValue.fromBytes(attributeValue.b());
}
if (attributeValue.hasM()) {
return EnhancedAttributeValue.fromMap(attributeValue.m());
}
if (attributeValue.hasL()) {
return EnhancedAttributeValue.fromListOfAttributeValues(attributeValue.l());
}
if (attributeValue.hasBs()) {
return EnhancedAttributeValue.fromSetOfBytes(attributeValue.bs());
}
if (attributeValue.hasSs()) {
return EnhancedAttributeValue.fromSetOfStrings(attributeValue.ss());
}
if (attributeValue.hasNs()) {
return EnhancedAttributeValue.fromSetOfNumbers(attributeValue.ns());
}
throw new IllegalStateException("Unable to convert attribute value: " + attributeValue);
}
/**
* Retrieve the underlying DynamoDB type of this value, such as String (s) or Number (n).
*
*
* This call should never fail with an {@link Exception}.
*/
public AttributeValueType type() {
return type;
}
/**
* Apply the provided visitor to this item attribute value, converting it into a specific type. This is useful in
* {@link AttributeConverter} implementations, without having to write a switch statement on the {@link #type()}.
*
*
* Reasons this call may fail with a {@link RuntimeException}:
*
* - If the provided visitor is null.
* - If the value cannot be converted by this visitor.
*
*/
public T convert(TypeConvertingVisitor convertingVisitor) {
Validate.paramNotNull(convertingVisitor, "convertingVisitor");
return convertingVisitor.convert(this);
}
/**
* Returns true if the underlying DynamoDB type of this value is a Map (m).
*
*
* This call should never fail with an {@link Exception}.
*/
public boolean isMap() {
return mapValue != null;
}
/**
* Returns true if the underlying DynamoDB type of this value is a String (s).
*
*
* This call should never fail with an {@link Exception}.
*/
public boolean isString() {
return stringValue != null;
}
/**
* Returns true if the underlying DynamoDB type of this value is a Number (n).
*
*
* This call should never fail with an {@link Exception}.
*/
public boolean isNumber() {
return numberValue != null;
}
/**
* Returns true if the underlying DynamoDB type of this value is Bytes (b).
*
*
* This call should never fail with an {@link Exception}.
*/
public boolean isBytes() {
return bytesValue != null;
}
/**
* Returns true if the underlying DynamoDB type of this value is a Boolean (bool).
*
*
* This call should never fail with an {@link Exception}.
*/
public boolean isBoolean() {
return booleanValue != null;
}
/**
* Returns true if the underlying DynamoDB type of this value is a Set of Strings (ss).
*
*
* This call should never fail with an {@link Exception}.
*/
public boolean isSetOfStrings() {
return setOfStringsValue != null;
}
/**
* Returns true if the underlying DynamoDB type of this value is a Set of Numbers (ns).
*
*
* This call should never fail with an {@link Exception}.
*/
public boolean isSetOfNumbers() {
return setOfNumbersValue != null;
}
/**
* Returns true if the underlying DynamoDB type of this value is a Set of Bytes (bs).
*
*
* This call should never fail with an {@link Exception}.
*/
public boolean isSetOfBytes() {
return setOfBytesValue != null;
}
/**
* Returns true if the underlying DynamoDB type of this value is a List of AttributeValues (l).
*
*
* This call should never fail with an {@link Exception}.
*/
public boolean isListOfAttributeValues() {
return listOfAttributeValuesValue != null;
}
/**
* Returns true if the underlying DynamoDB type of this value is Null (null).
*
*
* This call should never fail with an {@link Exception}.
*/
public boolean isNull() {
return isNull;
}
/**
* Retrieve this value as a map.
*
*
* This call will fail with a {@link RuntimeException} if {@link #isMap()} is false.
*/
public Map asMap() {
Validate.isTrue(isMap(), "Value is not a map.");
return mapValue;
}
/**
* Retrieve this value as a string.
*
*
* This call will fail with a {@link RuntimeException} if {@link #isString()} is false.
*/
public String asString() {
Validate.isTrue(isString(), "Value is not a string.");
return stringValue;
}
/**
* Retrieve this value as a number.
*
* Note: This returns a {@code String} (instead of a {@code Number}), because that's the generated type from
* DynamoDB: {@link AttributeValue#n()}.
*
*
* This call will fail with a {@link RuntimeException} if {@link #isNumber()} is false.
*/
public String asNumber() {
Validate.isTrue(isNumber(), "Value is not a number.");
return numberValue;
}
/**
* Retrieve this value as bytes.
*
*
* This call will fail with a {@link RuntimeException} if {@link #isBytes()} is false.
*/
public SdkBytes asBytes() {
Validate.isTrue(isBytes(), "Value is not bytes.");
return bytesValue;
}
/**
* Retrieve this value as a boolean.
*
*
* This call will fail with a {@link RuntimeException} if {@link #isBoolean()} is false.
*/
public Boolean asBoolean() {
Validate.isTrue(isBoolean(), "Value is not a boolean.");
return booleanValue;
}
/**
* Retrieve this value as a set of strings.
*
*
* Note: This returns a {@code List} (instead of a {@code Set}), because that's the generated type from
* DynamoDB: {@link AttributeValue#ss()}.
*
*
* This call will fail with a {@link RuntimeException} if {@link #isSetOfStrings()} is false.
*/
public List asSetOfStrings() {
Validate.isTrue(isSetOfStrings(), "Value is not a list of strings.");
return setOfStringsValue;
}
/**
* Retrieve this value as a set of numbers.
*
*
* Note: This returns a {@code List} (instead of a {@code Set}), because that's the generated type from
* DynamoDB: {@link AttributeValue#ns()}.
*
*
* This call will fail with a {@link RuntimeException} if {@link #isSetOfNumbers()} is false.
*/
public List asSetOfNumbers() {
Validate.isTrue(isSetOfNumbers(), "Value is not a list of numbers.");
return setOfNumbersValue;
}
/**
* Retrieve this value as a set of bytes.
*
*
* Note: This returns a {@code List} (instead of a {@code Set}), because that's the generated type from
* DynamoDB: {@link AttributeValue#bs()}.
*
*
* This call will fail with a {@link RuntimeException} if {@link #isSetOfBytes()} is false.
*/
public List asSetOfBytes() {
Validate.isTrue(isSetOfBytes(), "Value is not a list of bytes.");
return setOfBytesValue;
}
/**
* Retrieve this value as a list of attribute values.
*
*
* This call will fail with a {@link RuntimeException} if {@link #isListOfAttributeValues()} is false.
*/
public List asListOfAttributeValues() {
Validate.isTrue(isListOfAttributeValues(), "Value is not a list of attribute values.");
return listOfAttributeValuesValue;
}
/**
* Convert this {@link EnhancedAttributeValue} into a generated {@code Map}.
*
*
* This call will fail with a {@link RuntimeException} if {@link #isMap()} is false.
*/
public Map toAttributeValueMap() {
Validate.validState(isMap(), "Cannot convert an attribute value of type %s to a generated item. Must be %s.",
type(), AttributeValueType.M);
AttributeValue generatedAttributeValue = toAttributeValue();
Validate.validState(generatedAttributeValue.m() != null && !(generatedAttributeValue.m() instanceof SdkAutoConstructMap),
"Map EnhancedAttributeValue was not converted into a Map AttributeValue.");
return generatedAttributeValue.m();
}
/**
* Convert this {@link EnhancedAttributeValue} into a generated {@link AttributeValue}.
*
*
* This call should never fail with an {@link Exception}.
*/
public AttributeValue toAttributeValue() {
return convert(ToGeneratedAttributeValueVisitor.INSTANCE);
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
EnhancedAttributeValue that = (EnhancedAttributeValue) o;
if (isNull != that.isNull) {
return false;
}
if (type != that.type) {
return false;
}
if (mapValue != null ? !mapValue.equals(that.mapValue) : that.mapValue != null) {
return false;
}
if (stringValue != null ? !stringValue.equals(that.stringValue) : that.stringValue != null) {
return false;
}
if (numberValue != null ? !numberValue.equals(that.numberValue) : that.numberValue != null) {
return false;
}
if (bytesValue != null ? !bytesValue.equals(that.bytesValue) : that.bytesValue != null) {
return false;
}
if (booleanValue != null ? !booleanValue.equals(that.booleanValue) : that.booleanValue != null) {
return false;
}
if (setOfStringsValue != null ? !setOfStringsValue.equals(that.setOfStringsValue) : that.setOfStringsValue != null) {
return false;
}
if (setOfNumbersValue != null ? !setOfNumbersValue.equals(that.setOfNumbersValue) : that.setOfNumbersValue != null) {
return false;
}
if (setOfBytesValue != null ? !setOfBytesValue.equals(that.setOfBytesValue) : that.setOfBytesValue != null) {
return false;
}
return listOfAttributeValuesValue != null ? listOfAttributeValuesValue.equals(that.listOfAttributeValuesValue)
: that.listOfAttributeValuesValue == null;
}
@Override
public int hashCode() {
int result = type.hashCode();
result = 31 * result + (isNull ? 1 : 0);
result = 31 * result + (mapValue != null ? mapValue.hashCode() : 0);
result = 31 * result + (stringValue != null ? stringValue.hashCode() : 0);
result = 31 * result + (numberValue != null ? numberValue.hashCode() : 0);
result = 31 * result + (bytesValue != null ? bytesValue.hashCode() : 0);
result = 31 * result + (booleanValue != null ? booleanValue.hashCode() : 0);
result = 31 * result + (setOfStringsValue != null ? setOfStringsValue.hashCode() : 0);
result = 31 * result + (setOfNumbersValue != null ? setOfNumbersValue.hashCode() : 0);
result = 31 * result + (setOfBytesValue != null ? setOfBytesValue.hashCode() : 0);
result = 31 * result + (listOfAttributeValuesValue != null ? listOfAttributeValuesValue.hashCode() : 0);
return result;
}
@Override
public String toString() {
Object value = convert(ToStringVisitor.INSTANCE);
return ToString.builder("EnhancedAttributeValue")
.add("type", type)
.add("value", value)
.build();
}
private static class ToGeneratedAttributeValueVisitor extends TypeConvertingVisitor {
private static final ToGeneratedAttributeValueVisitor INSTANCE = new ToGeneratedAttributeValueVisitor();
private ToGeneratedAttributeValueVisitor() {
super(AttributeValue.class);
}
@Override
public AttributeValue convertNull() {
return AttributeValue.builder().nul(true).build();
}
@Override
public AttributeValue convertMap(Map value) {
return AttributeValue.builder().m(value).build();
}
@Override
public AttributeValue convertString(String value) {
return AttributeValue.builder().s(value).build();
}
@Override
public AttributeValue convertNumber(String value) {
return AttributeValue.builder().n(value).build();
}
@Override
public AttributeValue convertBytes(SdkBytes value) {
return AttributeValue.builder().b(value).build();
}
@Override
public AttributeValue convertBoolean(Boolean value) {
return AttributeValue.builder().bool(value).build();
}
@Override
public AttributeValue convertSetOfStrings(List value) {
return AttributeValue.builder().ss(value).build();
}
@Override
public AttributeValue convertSetOfNumbers(List value) {
return AttributeValue.builder().ns(value).build();
}
@Override
public AttributeValue convertSetOfBytes(List value) {
return AttributeValue.builder().bs(value).build();
}
@Override
public AttributeValue convertListOfAttributeValues(List value) {
return AttributeValue.builder().l(value).build();
}
}
private static class ToStringVisitor extends TypeConvertingVisitor