TypeConvertingVisitor (AWS Java SDK :: DynamoDB :: Enhanced Client 2.19.33 API)

java.lang.Object
- software.amazon.awssdk.enhanced.dynamodb.internal.converter.TypeConvertingVisitor<T>

```
public abstract class TypeConvertingVisitor<T>
extends Object
```
A visitor across all possible types of a EnhancedAttributeValue.
This is useful in AttributeConverter implementations, without having to write a switch statement on the EnhancedAttributeValue.type().

See Also:

EnhancedAttributeValue.convert(TypeConvertingVisitor)

Field Summary

Fields
Modifier and Type Field and Description

protected Class<?> targetType

Fields
Modifier and Type	Field and Description
`protected Class<?>`	`targetType`

Constructor Summary

Constructors
Modifier	Constructor and Description
`protected`	`TypeConvertingVisitor(Class<?> targetType)` Called by subclasses to provide enhanced logging when a specific type isn't handled.
`protected`	`TypeConvertingVisitor(Class<?> targetType, Class<?> converterClass)` Called by subclasses to provide enhanced logging when a specific type isn't handled.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`T`	`convert(EnhancedAttributeValue value)` Convert the provided value into the target type.
`T`	`convertBoolean(Boolean value)` Invoked when visiting an attribute in which `EnhancedAttributeValue.isBoolean()` is true.
`T`	`convertBytes(SdkBytes value)` Invoked when visiting an attribute in which `EnhancedAttributeValue.isBytes()` is true.
`T`	`convertListOfAttributeValues(List<AttributeValue> value)` Invoked when visiting an attribute in which `EnhancedAttributeValue.isListOfAttributeValues()` is true.
`T`	`convertMap(Map<String,AttributeValue> value)` Invoked when visiting an attribute in which `EnhancedAttributeValue.isMap()` is true.
`T`	`convertNull()` Invoked when visiting an attribute in which `EnhancedAttributeValue.isNull()` is true.
`T`	`convertNumber(String value)` Invoked when visiting an attribute in which `EnhancedAttributeValue.isNumber()` is true.
`T`	`convertSetOfBytes(List<SdkBytes> value)` Invoked when visiting an attribute in which `EnhancedAttributeValue.isSetOfBytes()` is true.
`T`	`convertSetOfNumbers(List<String> value)` Invoked when visiting an attribute in which `EnhancedAttributeValue.isSetOfNumbers()` is true.
`T`	`convertSetOfStrings(List<String> value)` Invoked when visiting an attribute in which `EnhancedAttributeValue.isSetOfStrings()` is true.
`T`	`convertString(String value)` Invoked when visiting an attribute in which `EnhancedAttributeValue.isString()` is true.
`T`	`defaultConvert(AttributeValueType type, Object value)` This is invoked by default if a different "convert" method is not overridden.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - targetType
```
protected final Class<?> targetType
```
- Constructor Detail
  - TypeConvertingVisitor
```
protected TypeConvertingVisitor(Class<?> targetType)
```
    Called by subclasses to provide enhanced logging when a specific type isn't handled.
    Reasons this call may fail with a RuntimeException:
    1. If the provided type is null.
    Parameters:
    
    targetType - The type to which this visitor is converting.
  - TypeConvertingVisitor
```
protected TypeConvertingVisitor(Class<?> targetType,
                                Class<?> converterClass)
```
    Called by subclasses to provide enhanced logging when a specific type isn't handled.
    Reasons this call may fail with a RuntimeException:
    1. If the provided type is null.
    Parameters:
    
    targetType - The type to which this visitor is converting.
    
    converterClass - The converter implementation that is creating this visitor. This may be null.
- Method Detail
  - convert
```
public final T convert(EnhancedAttributeValue value)
```
    Convert the provided value into the target type.
    Reasons this call may fail with a RuntimeException:
    1. If the value cannot be converted by this visitor.
  - convertNull
```
public T convertNull()
```
    Invoked when visiting an attribute in which EnhancedAttributeValue.isNull() is true.
  - convertMap
```
public T convertMap(Map<String,AttributeValue> value)
```
    Invoked when visiting an attribute in which EnhancedAttributeValue.isMap() is true. The provided value is the underlying value of the EnhancedAttributeValue being converted.
  - convertString
```
public T convertString(String value)
```
    Invoked when visiting an attribute in which EnhancedAttributeValue.isString() is true. The provided value is the underlying value of the EnhancedAttributeValue being converted.
  - convertNumber
```
public T convertNumber(String value)
```
    Invoked when visiting an attribute in which EnhancedAttributeValue.isNumber() is true. The provided value is the underlying value of the EnhancedAttributeValue being converted.
  - convertBytes
```
public T convertBytes(SdkBytes value)
```
    Invoked when visiting an attribute in which EnhancedAttributeValue.isBytes() is true. The provided value is the underlying value of the EnhancedAttributeValue being converted.
  - convertBoolean
```
public T convertBoolean(Boolean value)
```
    Invoked when visiting an attribute in which EnhancedAttributeValue.isBoolean() is true. The provided value is the underlying value of the EnhancedAttributeValue being converted.
  - convertSetOfStrings
```
public T convertSetOfStrings(List<String> value)
```
    Invoked when visiting an attribute in which EnhancedAttributeValue.isSetOfStrings() is true. The provided value is the underlying value of the EnhancedAttributeValue being converted.
  - convertSetOfNumbers
```
public T convertSetOfNumbers(List<String> value)
```
    Invoked when visiting an attribute in which EnhancedAttributeValue.isSetOfNumbers() is true. The provided value is the underlying value of the EnhancedAttributeValue being converted.
  - convertSetOfBytes
```
public T convertSetOfBytes(List<SdkBytes> value)
```
    Invoked when visiting an attribute in which EnhancedAttributeValue.isSetOfBytes() is true. The provided value is the underlying value of the EnhancedAttributeValue being converted.
  - convertListOfAttributeValues
```
public T convertListOfAttributeValues(List<AttributeValue> value)
```
    Invoked when visiting an attribute in which EnhancedAttributeValue.isListOfAttributeValues() is true. The provided value is the underlying value of the EnhancedAttributeValue being converted.
  - defaultConvert
```
public T defaultConvert(AttributeValueType type,
                        Object value)
```
    This is invoked by default if a different "convert" method is not overridden. By default, this throws an exception.
    
    Parameters:
    
    type - The type that wasn't handled by another "convert" method.
    
    value - The value that wasn't handled by another "convert" method.

Class TypeConvertingVisitor<T>

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

targetType

Constructor Detail

TypeConvertingVisitor

TypeConvertingVisitor

Method Detail

convert

convertNull

convertMap

convertString

convertNumber

convertBytes

convertBoolean

convertSetOfStrings

convertSetOfNumbers

convertSetOfBytes

convertListOfAttributeValues

defaultConvert