Package software.amazon.awssdk.services.dynamodb.model

Class Get

java.lang.Object
software.amazon.awssdk.services.dynamodb.model.Get
All Implemented Interfaces:
Serializable, SdkPojo, ToCopyableBuilder<Get.Builder,Get>
@Generated("software.amazon.awssdk:codegen") public final class Get extends Object implements SdkPojo, Serializable, ToCopyableBuilder<Get.Builder,Get>

Specifies an item and related attribute values to retrieve in a TransactGetItem object.

See Also:

  • Method Details

    • hasKey

      public final boolean hasKey()
      For responses, this returns true if the service returned a value for the Key property. This DOES NOT check that the value is non-empty (for which, you should check the isEmpty() method on the property). This is useful because the SDK will never return a null collection or map, but you may need to differentiate between the service returning nothing (or null) and the service returning an empty collection or map. For requests, this returns true if a value for the property was specified in the request builder, and false if a value was not specified.

    • key

      public final Map<String,AttributeValue> key()

      A map of attribute names to AttributeValue objects that specifies the primary key of the item to retrieve.

      Attempts to modify the collection returned by this method will result in an UnsupportedOperationException.

      This method will never return null. If you would like to know whether the service returned this field (so that you can differentiate between null and empty), you can use the hasKey() method.

      Returns:
      A map of attribute names to AttributeValue objects that specifies the primary key of the item to retrieve.

    • tableName

      public final String tableName()

      The name of the table from which to retrieve the specified item. You can also provide the Amazon Resource Name (ARN) of the table in this parameter.

      Returns:
      The name of the table from which to retrieve the specified item. You can also provide the Amazon Resource Name (ARN) of the table in this parameter.

    • projectionExpression

      public final String projectionExpression()

      A string that identifies one or more attributes of the specified item to retrieve from the table. The attributes in the expression must be separated by commas. If no attribute names are specified, then all attributes of the specified item are returned. If any of the requested attributes are not found, they do not appear in the result.

      Returns:
      A string that identifies one or more attributes of the specified item to retrieve from the table. The attributes in the expression must be separated by commas. If no attribute names are specified, then all attributes of the specified item are returned. If any of the requested attributes are not found, they do not appear in the result.

    • hasExpressionAttributeNames

      public final boolean hasExpressionAttributeNames()
      For responses, this returns true if the service returned a value for the ExpressionAttributeNames property. This DOES NOT check that the value is non-empty (for which, you should check the isEmpty() method on the property). This is useful because the SDK will never return a null collection or map, but you may need to differentiate between the service returning nothing (or null) and the service returning an empty collection or map. For requests, this returns true if a value for the property was specified in the request builder, and false if a value was not specified.

    • expressionAttributeNames

      public final Map<String,String> expressionAttributeNames()

      One or more substitution tokens for attribute names in the ProjectionExpression parameter.

      Attempts to modify the collection returned by this method will result in an UnsupportedOperationException.

      This method will never return null. If you would like to know whether the service returned this field (so that you can differentiate between null and empty), you can use the hasExpressionAttributeNames() method.

      Returns:
      One or more substitution tokens for attribute names in the ProjectionExpression parameter.

    • toBuilder

      public Get.Builder toBuilder()
      Description copied from interface: ToCopyableBuilder
      Take this object and create a builder that contains all of the current property values of this object.
      Specified by:
      toBuilder in interface ToCopyableBuilder<Get.Builder,Get>
      Returns:
      a builder for type T

    • builder

      public static Get.Builder builder()

    • serializableBuilderClass

      public static Class<? extends Get.Builder> serializableBuilderClass()

    • hashCode

      public final int hashCode()
      Overrides:
      hashCode in class Object

    • equals

      public final boolean equals(Object obj)
      Overrides:
      equals in class Object

    • equalsBySdkFields

      public final boolean equalsBySdkFields(Object obj)
      Description copied from interface: SdkPojo
      Indicates whether some other object is "equal to" this one by SDK fields. An SDK field is a modeled, non-inherited field in an SdkPojo class, and is generated based on a service model.

      If an SdkPojo class does not have any inherited fields, equalsBySdkFields and equals are essentially the same.

      Specified by:
      equalsBySdkFields in interface SdkPojo
      Parameters:
      obj - the object to be compared with
      Returns:
      true if the other object equals to this object by sdk fields, false otherwise.

    • toString

      public final String toString()
      Returns a string representation of this object. This is useful for testing and debugging. Sensitive data will be redacted from this string using a placeholder value.
      Overrides:
      toString in class Object

    • getValueForField

      public final <T> Optional<T> getValueForField(String fieldName, Class<T> clazz)

    • sdkFields

      public final List<SdkField<?>> sdkFields()
      Specified by:
      sdkFields in interface SdkPojo
      Returns:
      List of SdkField in this POJO. May be empty list but should never be null.