Class ConditionCheck

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

Represents a request to perform a check that an item exists or to check the condition of specific attributes of the item.

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()

      The primary key of the item to be checked. Each element consists of an attribute name and a value for that attribute.

      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:
      The primary key of the item to be checked. Each element consists of an attribute name and a value for that attribute.

    • tableName

      public final String tableName()

      Name of the table for the check item request. You can also provide the Amazon Resource Name (ARN) of the table in this parameter.

      Returns:
      Name of the table for the check item request. You can also provide the Amazon Resource Name (ARN) of the table in this parameter.

    • conditionExpression

      public final String conditionExpression()

      A condition that must be satisfied in order for a conditional update to succeed. For more information, see Condition expressions in the Amazon DynamoDB Developer Guide.

      Returns:
      A condition that must be satisfied in order for a conditional update to succeed. For more information, see Condition expressions in the Amazon DynamoDB Developer Guide.

    • 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 an expression. For more information, see Expression attribute names in the Amazon DynamoDB Developer Guide.

      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 an expression. For more information, see Expression attribute names in the Amazon DynamoDB Developer Guide.

    • hasExpressionAttributeValues

      public final boolean hasExpressionAttributeValues()
      For responses, this returns true if the service returned a value for the ExpressionAttributeValues 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.

    • expressionAttributeValues

      public final Map<String,AttributeValue> expressionAttributeValues()

      One or more values that can be substituted in an expression. For more information, see Condition expressions in the Amazon DynamoDB Developer Guide.

      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 hasExpressionAttributeValues() method.

      Returns:
      One or more values that can be substituted in an expression. For more information, see Condition expressions in the Amazon DynamoDB Developer Guide.

    • returnValuesOnConditionCheckFailure

      public final ReturnValuesOnConditionCheckFailure returnValuesOnConditionCheckFailure()

      Use ReturnValuesOnConditionCheckFailure to get the item attributes if the ConditionCheck condition fails. For ReturnValuesOnConditionCheckFailure, the valid values are: NONE and ALL_OLD.

      If the service returns an enum value that is not available in the current SDK version, returnValuesOnConditionCheckFailure will return ReturnValuesOnConditionCheckFailure.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from returnValuesOnConditionCheckFailureAsString().

      Returns:
      Use ReturnValuesOnConditionCheckFailure to get the item attributes if the ConditionCheck condition fails. For ReturnValuesOnConditionCheckFailure, the valid values are: NONE and ALL_OLD.
      See Also:

    • returnValuesOnConditionCheckFailureAsString

      public final String returnValuesOnConditionCheckFailureAsString()

      Use ReturnValuesOnConditionCheckFailure to get the item attributes if the ConditionCheck condition fails. For ReturnValuesOnConditionCheckFailure, the valid values are: NONE and ALL_OLD.

      If the service returns an enum value that is not available in the current SDK version, returnValuesOnConditionCheckFailure will return ReturnValuesOnConditionCheckFailure.UNKNOWN_TO_SDK_VERSION. The raw value returned by the service is available from returnValuesOnConditionCheckFailureAsString().

      Returns:
      Use ReturnValuesOnConditionCheckFailure to get the item attributes if the ConditionCheck condition fails. For ReturnValuesOnConditionCheckFailure, the valid values are: NONE and ALL_OLD.
      See Also:

    • toBuilder

      public ConditionCheck.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<ConditionCheck.Builder,ConditionCheck>
      Returns:
      a builder for type T

    • builder

      public static ConditionCheck.Builder builder()

    • serializableBuilderClass

      public static Class<? extends ConditionCheck.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.