GetItemRequest (AWS SDK for Android

java.lang.Object
- com.amazonaws.AmazonWebServiceRequest
- - com.amazonaws.services.dynamodbv2.model.GetItemRequest

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable
```
public class GetItemRequest
extends AmazonWebServiceRequest
implements java.io.Serializable
```
The GetItem operation returns a set of attributes for the item with the given primary key. If there is no matching item, GetItem does not return any data and there will be no Item element in the response.

GetItem provides an eventually consistent read by default. If your application requires a strongly consistent read, set ConsistentRead to true. Although a strongly consistent read might take more time than an eventually consistent read, it always returns the last updated value.

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor and Description
`GetItemRequest()` Default constructor for GetItemRequest object.
`GetItemRequest(java.lang.String tableName, java.util.Map<java.lang.String,AttributeValue> key)` Constructs a new GetItemRequest object.
`GetItemRequest(java.lang.String tableName, java.util.Map<java.lang.String,AttributeValue> key, java.lang.Boolean consistentRead)` Constructs a new GetItemRequest object.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`GetItemRequest`	`addExpressionAttributeNamesEntry(java.lang.String key, java.lang.String value)` One or more substitution tokens for attribute names in an expression.
`GetItemRequest`	`addKeyEntry(java.lang.String key, AttributeValue value)` A map of attribute names to `AttributeValue` objects, representing the primary key of the item to retrieve.
`GetItemRequest`	`clearExpressionAttributeNamesEntries()` Removes all the entries added into ExpressionAttributeNames.
`GetItemRequest`	`clearKeyEntries()` Removes all the entries added into Key.
`boolean`	`equals(java.lang.Object obj)`
`java.util.List<java.lang.String>`	`getAttributesToGet()` This is a legacy parameter.
`java.lang.Boolean`	`getConsistentRead()` Determines the read consistency model: If set to `true`, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
`java.util.Map<java.lang.String,java.lang.String>`	`getExpressionAttributeNames()` One or more substitution tokens for attribute names in an expression.
`java.util.Map<java.lang.String,AttributeValue>`	`getKey()` A map of attribute names to `AttributeValue` objects, representing the primary key of the item to retrieve.
`java.lang.String`	`getProjectionExpression()` A string that identifies one or more attributes to retrieve from the table.
`java.lang.String`	`getReturnConsumedCapacity()` Determines the level of detail about provisioned throughput consumption that is returned in the response:
`java.lang.String`	`getTableName()` The name of the table containing the requested item.
`int`	`hashCode()`
`java.lang.Boolean`	`isConsistentRead()` Determines the read consistency model: If set to `true`, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
`void`	`setAttributesToGet(java.util.Collection<java.lang.String> attributesToGet)` This is a legacy parameter.
`void`	`setConsistentRead(java.lang.Boolean consistentRead)` Determines the read consistency model: If set to `true`, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
`void`	`setExpressionAttributeNames(java.util.Map<java.lang.String,java.lang.String> expressionAttributeNames)` One or more substitution tokens for attribute names in an expression.
`void`	`setKey(java.util.Map<java.lang.String,AttributeValue> key)` A map of attribute names to `AttributeValue` objects, representing the primary key of the item to retrieve.
`void`	`setProjectionExpression(java.lang.String projectionExpression)` A string that identifies one or more attributes to retrieve from the table.
`void`	`setReturnConsumedCapacity(ReturnConsumedCapacity returnConsumedCapacity)` Determines the level of detail about provisioned throughput consumption that is returned in the response:
`void`	`setReturnConsumedCapacity(java.lang.String returnConsumedCapacity)` Determines the level of detail about provisioned throughput consumption that is returned in the response:
`void`	`setTableName(java.lang.String tableName)` The name of the table containing the requested item.
`java.lang.String`	`toString()` Returns a string representation of this object; useful for testing and debugging.
`GetItemRequest`	`withAttributesToGet(java.util.Collection<java.lang.String> attributesToGet)` This is a legacy parameter.
`GetItemRequest`	`withAttributesToGet(java.lang.String... attributesToGet)` This is a legacy parameter.
`GetItemRequest`	`withConsistentRead(java.lang.Boolean consistentRead)` Determines the read consistency model: If set to `true`, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
`GetItemRequest`	`withExpressionAttributeNames(java.util.Map<java.lang.String,java.lang.String> expressionAttributeNames)` One or more substitution tokens for attribute names in an expression.
`GetItemRequest`	`withKey(java.util.Map<java.lang.String,AttributeValue> key)` A map of attribute names to `AttributeValue` objects, representing the primary key of the item to retrieve.
`GetItemRequest`	`withProjectionExpression(java.lang.String projectionExpression)` A string that identifies one or more attributes to retrieve from the table.
`GetItemRequest`	`withReturnConsumedCapacity(ReturnConsumedCapacity returnConsumedCapacity)` Determines the level of detail about provisioned throughput consumption that is returned in the response:
`GetItemRequest`	`withReturnConsumedCapacity(java.lang.String returnConsumedCapacity)` Determines the level of detail about provisioned throughput consumption that is returned in the response:
`GetItemRequest`	`withTableName(java.lang.String tableName)` The name of the table containing the requested item.

Methods inherited from class com.amazonaws.AmazonWebServiceRequest
clone, getCloneRoot, getCloneSource, getGeneralProgressListener, getRequestClientOptions, getRequestCredentials, getRequestMetricCollector, setGeneralProgressListener, setRequestCredentials, setRequestMetricCollector, withGeneralProgressListener, withRequestMetricCollector

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - GetItemRequest
```
public GetItemRequest()
```
    Default constructor for GetItemRequest object. Callers should use the setter or fluent setter (with...) methods to initialize any additional object members.
  - GetItemRequest
```
public GetItemRequest(java.lang.String tableName,
                      java.util.Map<java.lang.String,AttributeValue> key)
```
    Constructs a new GetItemRequest object. Callers should use the setter or fluent setter (with...) methods to initialize any additional object members.
    
    Parameters:
    
    tableName -
    The name of the table containing the requested item.
    
    key -
    A map of attribute names to AttributeValue objects, representing the primary key of the item to retrieve.
    
    For the primary key, you must provide all of the attributes. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key.
  - GetItemRequest
```
public GetItemRequest(java.lang.String tableName,
                      java.util.Map<java.lang.String,AttributeValue> key,
                      java.lang.Boolean consistentRead)
```
    Constructs a new GetItemRequest object. Callers should use the setter or fluent setter (with...) methods to initialize any additional object members.
    
    Parameters:
    
    tableName -
    The name of the table containing the requested item.
    
    key -
    A map of attribute names to AttributeValue objects, representing the primary key of the item to retrieve.
    
    For the primary key, you must provide all of the attributes. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key.
    
    consistentRead -
    Determines the read consistency model: If set to true, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
- Method Detail
  - getTableName
```
public java.lang.String getTableName()
```
    The name of the table containing the requested item.
    
    Constraints:
    Length: 3 - 255
    Pattern: [a-zA-Z0-9_.-]+
    
    Returns:
    
    The name of the table containing the requested item.
  - setTableName
```
public void setTableName(java.lang.String tableName)
```
    The name of the table containing the requested item.
    
    Constraints:
    Length: 3 - 255
    Pattern: [a-zA-Z0-9_.-]+
    
    Parameters:
    
    tableName -
    The name of the table containing the requested item.
  - withTableName
```
public GetItemRequest withTableName(java.lang.String tableName)
```
    The name of the table containing the requested item.
    
    Returns a reference to this object so that method calls can be chained together.
    Constraints:
    Length: 3 - 255
    Pattern: [a-zA-Z0-9_.-]+
    
    Parameters:
    
    tableName -
    The name of the table containing the requested item.
    
    Returns:
    
    A reference to this updated object so that method calls can be chained together.
  - getKey
```
public java.util.Map<java.lang.String,AttributeValue> getKey()
```
    A map of attribute names to AttributeValue objects, representing the primary key of the item to retrieve.
    
    For the primary key, you must provide all of the attributes. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key.
    
    Returns:
    
    A map of attribute names to AttributeValue objects, representing the primary key of the item to retrieve.
    
    For the primary key, you must provide all of the attributes. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key.
  - setKey
```
public void setKey(java.util.Map<java.lang.String,AttributeValue> key)
```
    A map of attribute names to AttributeValue objects, representing the primary key of the item to retrieve.
    
    For the primary key, you must provide all of the attributes. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key.
    
    Parameters:
    
    key -
    A map of attribute names to AttributeValue objects, representing the primary key of the item to retrieve.
    
    For the primary key, you must provide all of the attributes. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key.
  - withKey
```
public GetItemRequest withKey(java.util.Map<java.lang.String,AttributeValue> key)
```
    A map of attribute names to AttributeValue objects, representing the primary key of the item to retrieve.
    
    For the primary key, you must provide all of the attributes. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key.
    
    Returns a reference to this object so that method calls can be chained together.
    
    Parameters:
    
    key -
    A map of attribute names to AttributeValue objects, representing the primary key of the item to retrieve.
    
    For the primary key, you must provide all of the attributes. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key.
    
    Returns:
    
    A reference to this updated object so that method calls can be chained together.
  - addKeyEntry
```
public GetItemRequest addKeyEntry(java.lang.String key,
                                  AttributeValue value)
```
    A map of attribute names to AttributeValue objects, representing the primary key of the item to retrieve.
    
    For the primary key, you must provide all of the attributes. For example, with a simple primary key, you only need to provide a value for the partition key. For a composite primary key, you must provide values for both the partition key and the sort key.
    
    The method adds a new key-value pair into Key parameter, and returns a reference to this object so that method calls can be chained together.
    
    Parameters:
    
    key - The key of the entry to be added into Key.
    
    value - The corresponding value of the entry to be added into Key.
    
    Returns:
    
    A reference to this updated object so that method calls can be chained together.
  - clearKeyEntries
```
public GetItemRequest clearKeyEntries()
```
    Removes all the entries added into Key.
    Returns a reference to this object so that method calls can be chained together.
  - getAttributesToGet
```
public java.util.List<java.lang.String> getAttributesToGet()
```
    This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
    
    Returns:
    
    This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
  - setAttributesToGet
```
public void setAttributesToGet(java.util.Collection<java.lang.String> attributesToGet)
```
    This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
    
    Parameters:
    
    attributesToGet -
    This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
  - withAttributesToGet
```
public GetItemRequest withAttributesToGet(java.lang.String... attributesToGet)
```
    This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
    
    Returns a reference to this object so that method calls can be chained together.
    
    Parameters:
    
    attributesToGet -
    This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
    
    Returns:
    
    A reference to this updated object so that method calls can be chained together.
  - withAttributesToGet
```
public GetItemRequest withAttributesToGet(java.util.Collection<java.lang.String> attributesToGet)
```
    This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
    
    Returns a reference to this object so that method calls can be chained together.
    
    Parameters:
    
    attributesToGet -
    This is a legacy parameter. Use ProjectionExpression instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
    
    Returns:
    
    A reference to this updated object so that method calls can be chained together.
  - isConsistentRead
```
public java.lang.Boolean isConsistentRead()
```
    Determines the read consistency model: If set to true, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
    
    Returns:
    
    Determines the read consistency model: If set to true, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
  - getConsistentRead
```
public java.lang.Boolean getConsistentRead()
```
    Determines the read consistency model: If set to true, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
    
    Returns:
    
    Determines the read consistency model: If set to true, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
  - setConsistentRead
```
public void setConsistentRead(java.lang.Boolean consistentRead)
```
    Determines the read consistency model: If set to true, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
    
    Parameters:
    
    consistentRead -
    Determines the read consistency model: If set to true, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
  - withConsistentRead
```
public GetItemRequest withConsistentRead(java.lang.Boolean consistentRead)
```
    Determines the read consistency model: If set to true, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
    
    Returns a reference to this object so that method calls can be chained together.
    
    Parameters:
    
    consistentRead -
    Determines the read consistency model: If set to true, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
    
    Returns:
    
    A reference to this updated object so that method calls can be chained together.
  - getReturnConsumedCapacity
```
public java.lang.String getReturnConsumedCapacity()
```
    Determines the level of detail about provisioned throughput consumption that is returned in the response:
    - INDEXES - The response includes the aggregate ConsumedCapacity for the operation, together with ConsumedCapacity for each table and secondary index that was accessed.
      
      Note that some operations, such as GetItem and BatchGetItem, do not access any indexes at all. In these cases, specifying INDEXES will only return ConsumedCapacity information for table(s).
    - TOTAL - The response includes only the aggregate ConsumedCapacity for the operation.
    - NONE - No ConsumedCapacity details are included in the response.
    Constraints:
    Allowed Values: INDEXES, TOTAL, NONE
    Returns:
    Determines the level of detail about provisioned throughput consumption that is returned in the response:
    
    INDEXES - The response includes the aggregate ConsumedCapacity for the operation, together with ConsumedCapacity for each table and secondary index that was accessed.
    
    Note that some operations, such as GetItem and BatchGetItem, do not access any indexes at all. In these cases, specifying INDEXES will only return ConsumedCapacity information for table(s).
    
    TOTAL - The response includes only the aggregate ConsumedCapacity for the operation.
    
    NONE - No ConsumedCapacity details are included in the response.
    See Also:
    
    ReturnConsumedCapacity
  - setReturnConsumedCapacity
```
public void setReturnConsumedCapacity(java.lang.String returnConsumedCapacity)
```
    Determines the level of detail about provisioned throughput consumption that is returned in the response:
    - INDEXES - The response includes the aggregate ConsumedCapacity for the operation, together with ConsumedCapacity for each table and secondary index that was accessed.
      
      Note that some operations, such as GetItem and BatchGetItem, do not access any indexes at all. In these cases, specifying INDEXES will only return ConsumedCapacity information for table(s).
    - TOTAL - The response includes only the aggregate ConsumedCapacity for the operation.
    - NONE - No ConsumedCapacity details are included in the response.
    Constraints:
    Allowed Values: INDEXES, TOTAL, NONE
    Parameters:
    returnConsumedCapacity -
    Determines the level of detail about provisioned throughput consumption that is returned in the response:
    
    INDEXES - The response includes the aggregate ConsumedCapacity for the operation, together with ConsumedCapacity for each table and secondary index that was accessed.
    
    Note that some operations, such as GetItem and BatchGetItem, do not access any indexes at all. In these cases, specifying INDEXES will only return ConsumedCapacity information for table(s).
    
    TOTAL - The response includes only the aggregate ConsumedCapacity for the operation.
    
    NONE - No ConsumedCapacity details are included in the response.
    See Also:
    
    ReturnConsumedCapacity
  - withReturnConsumedCapacity
```
public GetItemRequest withReturnConsumedCapacity(java.lang.String returnConsumedCapacity)
```
    Determines the level of detail about provisioned throughput consumption that is returned in the response:
    - INDEXES - The response includes the aggregate ConsumedCapacity for the operation, together with ConsumedCapacity for each table and secondary index that was accessed.
      
      Note that some operations, such as GetItem and BatchGetItem, do not access any indexes at all. In these cases, specifying INDEXES will only return ConsumedCapacity information for table(s).
    - TOTAL - The response includes only the aggregate ConsumedCapacity for the operation.
    - NONE - No ConsumedCapacity details are included in the response.
    Returns a reference to this object so that method calls can be chained together.
    Constraints:
    Allowed Values: INDEXES, TOTAL, NONE
    Parameters:
    returnConsumedCapacity -
    Determines the level of detail about provisioned throughput consumption that is returned in the response:
    
    INDEXES - The response includes the aggregate ConsumedCapacity for the operation, together with ConsumedCapacity for each table and secondary index that was accessed.
    
    Note that some operations, such as GetItem and BatchGetItem, do not access any indexes at all. In these cases, specifying INDEXES will only return ConsumedCapacity information for table(s).
    
    TOTAL - The response includes only the aggregate ConsumedCapacity for the operation.
    
    NONE - No ConsumedCapacity details are included in the response.
    Returns:
    
    A reference to this updated object so that method calls can be chained together.
    
    See Also:
    
    ReturnConsumedCapacity
  - setReturnConsumedCapacity
```
public void setReturnConsumedCapacity(ReturnConsumedCapacity returnConsumedCapacity)
```
    Determines the level of detail about provisioned throughput consumption that is returned in the response:
    - INDEXES - The response includes the aggregate ConsumedCapacity for the operation, together with ConsumedCapacity for each table and secondary index that was accessed.
      
      Note that some operations, such as GetItem and BatchGetItem, do not access any indexes at all. In these cases, specifying INDEXES will only return ConsumedCapacity information for table(s).
    - TOTAL - The response includes only the aggregate ConsumedCapacity for the operation.
    - NONE - No ConsumedCapacity details are included in the response.
    Constraints:
    Allowed Values: INDEXES, TOTAL, NONE
    Parameters:
    returnConsumedCapacity -
    Determines the level of detail about provisioned throughput consumption that is returned in the response:
    
    INDEXES - The response includes the aggregate ConsumedCapacity for the operation, together with ConsumedCapacity for each table and secondary index that was accessed.
    
    Note that some operations, such as GetItem and BatchGetItem, do not access any indexes at all. In these cases, specifying INDEXES will only return ConsumedCapacity information for table(s).
    
    TOTAL - The response includes only the aggregate ConsumedCapacity for the operation.
    
    NONE - No ConsumedCapacity details are included in the response.
    See Also:
    
    ReturnConsumedCapacity
  - withReturnConsumedCapacity
```
public GetItemRequest withReturnConsumedCapacity(ReturnConsumedCapacity returnConsumedCapacity)
```
    Determines the level of detail about provisioned throughput consumption that is returned in the response:
    - INDEXES - The response includes the aggregate ConsumedCapacity for the operation, together with ConsumedCapacity for each table and secondary index that was accessed.
      
      Note that some operations, such as GetItem and BatchGetItem, do not access any indexes at all. In these cases, specifying INDEXES will only return ConsumedCapacity information for table(s).
    - TOTAL - The response includes only the aggregate ConsumedCapacity for the operation.
    - NONE - No ConsumedCapacity details are included in the response.
    Returns a reference to this object so that method calls can be chained together.
    Constraints:
    Allowed Values: INDEXES, TOTAL, NONE
    Parameters:
    returnConsumedCapacity -
    Determines the level of detail about provisioned throughput consumption that is returned in the response:
    
    INDEXES - The response includes the aggregate ConsumedCapacity for the operation, together with ConsumedCapacity for each table and secondary index that was accessed.
    
    Note that some operations, such as GetItem and BatchGetItem, do not access any indexes at all. In these cases, specifying INDEXES will only return ConsumedCapacity information for table(s).
    
    TOTAL - The response includes only the aggregate ConsumedCapacity for the operation.
    
    NONE - No ConsumedCapacity details are included in the response.
    Returns:
    
    A reference to this updated object so that method calls can be chained together.
    
    See Also:
    
    ReturnConsumedCapacity
  - getProjectionExpression
```
public java.lang.String getProjectionExpression()
```
    A string that identifies one or more attributes to retrieve from the table. These attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by commas.
    
    If no attribute names are specified, then all attributes will be returned. If any of the requested attributes are not found, they will not appear in the result.
    
    For more information, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.
    
    Returns:
    
    A string that identifies one or more attributes to retrieve from the table. These attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by commas.
    
    If no attribute names are specified, then all attributes will be returned. If any of the requested attributes are not found, they will not appear in the result.
    
    For more information, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.
  - setProjectionExpression
```
public void setProjectionExpression(java.lang.String projectionExpression)
```
    A string that identifies one or more attributes to retrieve from the table. These attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by commas.
    
    If no attribute names are specified, then all attributes will be returned. If any of the requested attributes are not found, they will not appear in the result.
    
    For more information, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.
    
    Parameters:
    
    projectionExpression -
    A string that identifies one or more attributes to retrieve from the table. These attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by commas.
    
    If no attribute names are specified, then all attributes will be returned. If any of the requested attributes are not found, they will not appear in the result.
    
    For more information, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.
  - withProjectionExpression
```
public GetItemRequest withProjectionExpression(java.lang.String projectionExpression)
```
    A string that identifies one or more attributes to retrieve from the table. These attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by commas.
    
    If no attribute names are specified, then all attributes will be returned. If any of the requested attributes are not found, they will not appear in the result.
    
    For more information, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.
    
    Returns a reference to this object so that method calls can be chained together.
    
    Parameters:
    
    projectionExpression -
    A string that identifies one or more attributes to retrieve from the table. These attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by commas.
    
    If no attribute names are specified, then all attributes will be returned. If any of the requested attributes are not found, they will not appear in the result.
    
    For more information, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.
    
    Returns:
    
    A reference to this updated object so that method calls can be chained together.
  - getExpressionAttributeNames
```
public java.util.Map<java.lang.String,java.lang.String> getExpressionAttributeNames()
```
    One or more substitution tokens for attribute names in an expression. The following are some use cases for using ExpressionAttributeNames:
    - To access an attribute whose name conflicts with a DynamoDB reserved word.
    - To create a placeholder for repeating occurrences of an attribute name in an expression.
    - To prevent special characters in an attribute name from being misinterpreted in an expression.
    Use the # character in an expression to dereference an attribute name. For example, consider the following attribute name:
    - Percentile
    The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For the complete list of reserved words, see Reserved Words in the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for ExpressionAttributeNames:
    - {"#P":"Percentile"}
    You could then use this substitution in an expression, as in this example:
    - #P = :val
    Tokens that begin with the : character are expression attribute values, which are placeholders for the actual value at runtime.
    
    For more information on expression attribute names, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.
    Returns:
    One or more substitution tokens for attribute names in an expression. The following are some use cases for using ExpressionAttributeNames:
    
    To access an attribute whose name conflicts with a DynamoDB reserved word.
    
    To create a placeholder for repeating occurrences of an attribute name in an expression.
    
    To prevent special characters in an attribute name from being misinterpreted in an expression.
    
    Use the # character in an expression to dereference an attribute name. For example, consider the following attribute name:
    
    Percentile
    
    The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For the complete list of reserved words, see Reserved Words in the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for ExpressionAttributeNames:
    
    {"#P":"Percentile"}
    
    You could then use this substitution in an expression, as in this example:
    
    #P = :val
    
    Tokens that begin with the : character are expression attribute values, which are placeholders for the actual value at runtime.
    
    For more information on expression attribute names, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.
  - setExpressionAttributeNames
```
public void setExpressionAttributeNames(java.util.Map<java.lang.String,java.lang.String> expressionAttributeNames)
```
    One or more substitution tokens for attribute names in an expression. The following are some use cases for using ExpressionAttributeNames:
    - To access an attribute whose name conflicts with a DynamoDB reserved word.
    - To create a placeholder for repeating occurrences of an attribute name in an expression.
    - To prevent special characters in an attribute name from being misinterpreted in an expression.
    Use the # character in an expression to dereference an attribute name. For example, consider the following attribute name:
    - Percentile
    The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For the complete list of reserved words, see Reserved Words in the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for ExpressionAttributeNames:
    - {"#P":"Percentile"}
    You could then use this substitution in an expression, as in this example:
    - #P = :val
    Tokens that begin with the : character are expression attribute values, which are placeholders for the actual value at runtime.
    
    For more information on expression attribute names, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.
    Parameters:
    expressionAttributeNames -
    One or more substitution tokens for attribute names in an expression. The following are some use cases for using ExpressionAttributeNames:
    
    To access an attribute whose name conflicts with a DynamoDB reserved word.
    
    To create a placeholder for repeating occurrences of an attribute name in an expression.
    
    To prevent special characters in an attribute name from being misinterpreted in an expression.
    
    Use the # character in an expression to dereference an attribute name. For example, consider the following attribute name:
    
    Percentile
    
    The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For the complete list of reserved words, see Reserved Words in the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for ExpressionAttributeNames:
    
    {"#P":"Percentile"}
    
    You could then use this substitution in an expression, as in this example:
    
    #P = :val
    
    Tokens that begin with the : character are expression attribute values, which are placeholders for the actual value at runtime.
    
    For more information on expression attribute names, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.
  - withExpressionAttributeNames
```
public GetItemRequest withExpressionAttributeNames(java.util.Map<java.lang.String,java.lang.String> expressionAttributeNames)
```
    One or more substitution tokens for attribute names in an expression. The following are some use cases for using ExpressionAttributeNames:
    - To access an attribute whose name conflicts with a DynamoDB reserved word.
    - To create a placeholder for repeating occurrences of an attribute name in an expression.
    - To prevent special characters in an attribute name from being misinterpreted in an expression.
    Use the # character in an expression to dereference an attribute name. For example, consider the following attribute name:
    - Percentile
    The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For the complete list of reserved words, see Reserved Words in the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for ExpressionAttributeNames:
    - {"#P":"Percentile"}
    You could then use this substitution in an expression, as in this example:
    - #P = :val
    Tokens that begin with the : character are expression attribute values, which are placeholders for the actual value at runtime.
    
    For more information on expression attribute names, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.
    
    Returns a reference to this object so that method calls can be chained together.
    Parameters:
    expressionAttributeNames -
    One or more substitution tokens for attribute names in an expression. The following are some use cases for using ExpressionAttributeNames:
    
    To access an attribute whose name conflicts with a DynamoDB reserved word.
    
    To create a placeholder for repeating occurrences of an attribute name in an expression.
    
    To prevent special characters in an attribute name from being misinterpreted in an expression.
    
    Use the # character in an expression to dereference an attribute name. For example, consider the following attribute name:
    
    Percentile
    
    The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For the complete list of reserved words, see Reserved Words in the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for ExpressionAttributeNames:
    
    {"#P":"Percentile"}
    
    You could then use this substitution in an expression, as in this example:
    
    #P = :val
    
    Tokens that begin with the : character are expression attribute values, which are placeholders for the actual value at runtime.
    
    For more information on expression attribute names, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.
    Returns:
    
    A reference to this updated object so that method calls can be chained together.
  - addExpressionAttributeNamesEntry
```
public GetItemRequest addExpressionAttributeNamesEntry(java.lang.String key,
                                                       java.lang.String value)
```
    One or more substitution tokens for attribute names in an expression. The following are some use cases for using ExpressionAttributeNames:
    - To access an attribute whose name conflicts with a DynamoDB reserved word.
    - To create a placeholder for repeating occurrences of an attribute name in an expression.
    - To prevent special characters in an attribute name from being misinterpreted in an expression.
    Use the # character in an expression to dereference an attribute name. For example, consider the following attribute name:
    - Percentile
    The name of this attribute conflicts with a reserved word, so it cannot be used directly in an expression. (For the complete list of reserved words, see Reserved Words in the Amazon DynamoDB Developer Guide). To work around this, you could specify the following for ExpressionAttributeNames:
    - {"#P":"Percentile"}
    You could then use this substitution in an expression, as in this example:
    - #P = :val
    Tokens that begin with the : character are expression attribute values, which are placeholders for the actual value at runtime.
    
    For more information on expression attribute names, see Accessing Item Attributes in the Amazon DynamoDB Developer Guide.
    
    The method adds a new key-value pair into ExpressionAttributeNames parameter, and returns a reference to this object so that method calls can be chained together.
    Parameters:
    
    key - The key of the entry to be added into ExpressionAttributeNames.
    
    value - The corresponding value of the entry to be added into ExpressionAttributeNames.
    
    Returns:
    
    A reference to this updated object so that method calls can be chained together.
  - clearExpressionAttributeNamesEntries
```
public GetItemRequest clearExpressionAttributeNamesEntries()
```
    Removes all the entries added into ExpressionAttributeNames.
    Returns a reference to this object so that method calls can be chained together.
  - toString
```
public java.lang.String toString()
```
    Returns a string representation of this object; useful for testing and debugging.
    
    Overrides:
    
    toString in class java.lang.Object
    
    Returns:
    
    A string representation of this object.
    
    See Also:
    
    Object.toString()
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class java.lang.Object
  - equals
```
public boolean equals(java.lang.Object obj)
```
    Overrides:
    
    equals in class java.lang.Object

Class GetItemRequest

Constructor Summary

Method Summary

Methods inherited from class com.amazonaws.AmazonWebServiceRequest

Methods inherited from class java.lang.Object

Constructor Detail

GetItemRequest

GetItemRequest

GetItemRequest

Method Detail

getTableName

setTableName

withTableName

getKey

setKey

withKey

addKeyEntry

clearKeyEntries

getAttributesToGet

setAttributesToGet

withAttributesToGet

withAttributesToGet

isConsistentRead

getConsistentRead

setConsistentRead

withConsistentRead

getReturnConsumedCapacity

setReturnConsumedCapacity

withReturnConsumedCapacity

setReturnConsumedCapacity

withReturnConsumedCapacity

getProjectionExpression

setProjectionExpression

withProjectionExpression

getExpressionAttributeNames

setExpressionAttributeNames

withExpressionAttributeNames

addExpressionAttributeNamesEntry

clearExpressionAttributeNamesEntries

toString

hashCode

equals