com.amazonaws.services.dynamodbv2.datamodeling

Annotation Type DynamoDBTypeConvertedJson

@Retention(value=RUNTIME)
 @Target(value={TYPE,FIELD,METHOD})
public @interface DynamoDBTypeConvertedJson

A simple JSON converter that uses the Jackson JSON processor. It shares all limitations of that library. For more information about Jackson, see: http://wiki.fasterxml.com/JacksonHome A minimal example using getter annotations,

 @DynamoDBTable(tableName="TestTable")
 public class TestClass {
     private String key;
     private Currency currency;

     @DynamoDBHashKey
     public String getKey() { return key; }
     public void setKey(String key) { this.key = key; }

     @DynamoDBTypeConvertedJson
     public Currency getCurrency() { return currency; }
     public void setCurrency(Currency currency) { this.currency = currency; }
 }
 

With the following complex type to convert,

 public class Currency {
     private Double amount;
     private String unit;

     public Double getAmount() { return amount; }
     public void setAmount(Double amount) { this.amount = amount; }

     public String getUnit() { return unit; }
     public void setUnit(String unit) { this.unit = unit; }
 }
 

Would write the following value to DynamoDB given,

• Currency(79.99,"USD") = "{\"amount\":79.99,\"unit\":\"USD\"}"

See Also:

DynamoDBTypeConverted

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
Class<? extends Object>	targetType The value type to use when calling the JSON mapper's readValue; a value of Void.class indicates to use the getter's type.

Element Detail

targetType

public abstract Class<? extends Object> targetType

The value type to use when calling the JSON mapper's readValue; a value of Void.class indicates to use the getter's type.

Default:

void.class