com.amazonaws.services.dynamodbv2.model

Class KeySchemaElement

java.lang.Object

com.amazonaws.services.dynamodbv2.model.KeySchemaElement

All Implemented Interfaces:

Serializable, Cloneable

public class KeySchemaElement
extends Object
implements Serializable, Cloneable

Represents a single element of a key schema. A key schema specifies the attributes that make up the primary key of a table, or the key attributes of an index.

A KeySchemaElement represents exactly one attribute of the primary key. For example, a simple primary key would be represented by one KeySchemaElement (for the partition key). A composite primary key would require one KeySchemaElement for the partition key, and another KeySchemaElement for the sort key.

A KeySchemaElement must be a scalar, top-level attribute (not a nested attribute). The data type must be one of String, Number, or Binary. The attribute cannot be nested within a List or a Map.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
KeySchemaElement() Default constructor for KeySchemaElement object.
KeySchemaElement(String attributeName, KeyType keyType) Constructs a new KeySchemaElement object.
KeySchemaElement(String attributeName, String keyType) Constructs a new KeySchemaElement object.

Method Summary

Modifier and Type	Method and Description
KeySchemaElement	clone()
boolean	equals(Object obj)
String	getAttributeName() The name of a key attribute.
String	getKeyType() The role that this key attribute will assume:
int	hashCode()
void	setAttributeName(String attributeName) The name of a key attribute.
void	setKeyType(KeyType keyType) The role that this key attribute will assume:
void	setKeyType(String keyType) The role that this key attribute will assume:
String	toString() Returns a string representation of this object; useful for testing and debugging.
KeySchemaElement	withAttributeName(String attributeName) The name of a key attribute.
KeySchemaElement	withKeyType(KeyType keyType) The role that this key attribute will assume:
KeySchemaElement	withKeyType(String keyType) The role that this key attribute will assume:

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

KeySchemaElement

public KeySchemaElement()

Default constructor for KeySchemaElement object. Callers should use the setter or fluent setter (with...) methods to initialize the object after creating it.

KeySchemaElement

public KeySchemaElement(String attributeName,
                        String keyType)

Constructs a new KeySchemaElement object. Callers should use the setter or fluent setter (with...) methods to initialize any additional object members.

Parameters:

attributeName - The name of a key attribute.

keyType - The role that this key attribute will assume:

• HASH - partition key

• RANGE - sort key

The partition key of an item is also known as its hash attribute. The term "hash attribute" derives from DynamoDB' usage of an internal hash function to evenly distribute data items across partitions, based on their partition key values.

The sort key of an item is also known as its range attribute. The term "range attribute" derives from the way DynamoDB stores items with the same partition key physically close together, in sorted order by the sort key value.

KeySchemaElement

public KeySchemaElement(String attributeName,
                        KeyType keyType)

Constructs a new KeySchemaElement object. Callers should use the setter or fluent setter (with...) methods to initialize any additional object members.

Parameters:

attributeName - The name of a key attribute.

keyType - The role that this key attribute will assume:

• HASH - partition key

• RANGE - sort key

The partition key of an item is also known as its hash attribute. The term "hash attribute" derives from DynamoDB' usage of an internal hash function to evenly distribute data items across partitions, based on their partition key values.

The sort key of an item is also known as its range attribute. The term "range attribute" derives from the way DynamoDB stores items with the same partition key physically close together, in sorted order by the sort key value.

Method Detail

setAttributeName

public void setAttributeName(String attributeName)

The name of a key attribute.

Parameters:

attributeName - The name of a key attribute.

getAttributeName

public String getAttributeName()

The name of a key attribute.

Returns:

The name of a key attribute.

withAttributeName

public KeySchemaElement withAttributeName(String attributeName)

The name of a key attribute.

Parameters:

attributeName - The name of a key attribute.

Returns:

Returns a reference to this object so that method calls can be chained together.

setKeyType

public void setKeyType(String keyType)

The role that this key attribute will assume:

• HASH - partition key

• RANGE - sort key

The partition key of an item is also known as its hash attribute. The term "hash attribute" derives from DynamoDB' usage of an internal hash function to evenly distribute data items across partitions, based on their partition key values.

The sort key of an item is also known as its range attribute. The term "range attribute" derives from the way DynamoDB stores items with the same partition key physically close together, in sorted order by the sort key value.

Parameters:

keyType - The role that this key attribute will assume:

• HASH - partition key

• RANGE - sort key

The partition key of an item is also known as its hash attribute. The term "hash attribute" derives from DynamoDB' usage of an internal hash function to evenly distribute data items across partitions, based on their partition key values.

The sort key of an item is also known as its range attribute. The term "range attribute" derives from the way DynamoDB stores items with the same partition key physically close together, in sorted order by the sort key value.

See Also:

KeyType

getKeyType

public String getKeyType()

The role that this key attribute will assume:

• HASH - partition key

• RANGE - sort key

The partition key of an item is also known as its hash attribute. The term "hash attribute" derives from DynamoDB' usage of an internal hash function to evenly distribute data items across partitions, based on their partition key values.

The sort key of an item is also known as its range attribute. The term "range attribute" derives from the way DynamoDB stores items with the same partition key physically close together, in sorted order by the sort key value.

Returns:

The role that this key attribute will assume:

• HASH - partition key

• RANGE - sort key

The partition key of an item is also known as its hash attribute. The term "hash attribute" derives from DynamoDB' usage of an internal hash function to evenly distribute data items across partitions, based on their partition key values.

The sort key of an item is also known as its range attribute. The term "range attribute" derives from the way DynamoDB stores items with the same partition key physically close together, in sorted order by the sort key value.

See Also:

KeyType

withKeyType

public KeySchemaElement withKeyType(String keyType)

The role that this key attribute will assume:

• HASH - partition key

• RANGE - sort key

The partition key of an item is also known as its hash attribute. The term "hash attribute" derives from DynamoDB' usage of an internal hash function to evenly distribute data items across partitions, based on their partition key values.

The sort key of an item is also known as its range attribute. The term "range attribute" derives from the way DynamoDB stores items with the same partition key physically close together, in sorted order by the sort key value.

Parameters:

keyType - The role that this key attribute will assume:

• HASH - partition key

• RANGE - sort key

The partition key of an item is also known as its hash attribute. The term "hash attribute" derives from DynamoDB' usage of an internal hash function to evenly distribute data items across partitions, based on their partition key values.

The sort key of an item is also known as its range attribute. The term "range attribute" derives from the way DynamoDB stores items with the same partition key physically close together, in sorted order by the sort key value.

Returns:

Returns a reference to this object so that method calls can be chained together.

See Also:

KeyType

setKeyType

public void setKeyType(KeyType keyType)

The role that this key attribute will assume:

• HASH - partition key

• RANGE - sort key

The partition key of an item is also known as its hash attribute. The term "hash attribute" derives from DynamoDB' usage of an internal hash function to evenly distribute data items across partitions, based on their partition key values.

The sort key of an item is also known as its range attribute. The term "range attribute" derives from the way DynamoDB stores items with the same partition key physically close together, in sorted order by the sort key value.

Parameters:

keyType - The role that this key attribute will assume:

• HASH - partition key

• RANGE - sort key

The partition key of an item is also known as its hash attribute. The term "hash attribute" derives from DynamoDB' usage of an internal hash function to evenly distribute data items across partitions, based on their partition key values.

The sort key of an item is also known as its range attribute. The term "range attribute" derives from the way DynamoDB stores items with the same partition key physically close together, in sorted order by the sort key value.

See Also:

KeyType

withKeyType

public KeySchemaElement withKeyType(KeyType keyType)

The role that this key attribute will assume:

• HASH - partition key

• RANGE - sort key

The partition key of an item is also known as its hash attribute. The term "hash attribute" derives from DynamoDB' usage of an internal hash function to evenly distribute data items across partitions, based on their partition key values.

The sort key of an item is also known as its range attribute. The term "range attribute" derives from the way DynamoDB stores items with the same partition key physically close together, in sorted order by the sort key value.

Parameters:

keyType - The role that this key attribute will assume:

• HASH - partition key

• RANGE - sort key

The partition key of an item is also known as its hash attribute. The term "hash attribute" derives from DynamoDB' usage of an internal hash function to evenly distribute data items across partitions, based on their partition key values.

The sort key of an item is also known as its range attribute. The term "range attribute" derives from the way DynamoDB stores items with the same partition key physically close together, in sorted order by the sort key value.

Returns:

Returns a reference to this object so that method calls can be chained together.

See Also:

KeyType

toString

public String toString()

Returns a string representation of this object; useful for testing and debugging.

Overrides:

toString in class Object

Returns:

A string representation of this object.

See Also:

Object.toString()

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

clone

public KeySchemaElement clone()

Overrides:

clone in class Object