Class Key (6.82.0) 

public final class Key implements Serializable

Represents a row key in a Cloud Spanner table or index. A key is a tuple of values constrained to the scalar Cloud Spanner types: currently these are BOOLEAN, INT64, FLOAT64, STRING, BYTES and TIMESTAMP. Values may be null where the table definition permits it.

Key is used to define the row, or endpoints of a range of rows, to retrieve in read operations or to delete in a mutation.

Key instances are immutable.

Inheritance

Object > Key

Implements

Serializable

Static Methods

newBuilder()

public static Key.Builder newBuilder()

Returns a new builder for constructing a key.

Returns
Type Description
Key.Builder

of(Object[] values)

public static Key of(Object[] values)

Construct a key with parts specified by values. Each object in values must be either null or one of the following supported types:

  • Boolean for the BOOL Cloud Spanner type
  • Integer, Long for the INT64 Cloud Spanner type
  • Float, Double for the FLOAT64 Cloud Spanner type
  • BigDecimal for the NUMERIC Cloud Spanner type
  • String for the STRING Cloud Spanner type
  • String for the JSON Cloud Spanner type
  • ByteArray for the BYTES Cloud Spanner type
  • Timestamp for the TIMESTAMP Cloud Spanner type
  • Date for the DATE Cloud Spanner type
Parameter
Name Description
values Object[]
Returns
Type Description
Key

Methods

equals(Object o)

public boolean equals(Object o)
Parameter
Name Description
o Object
Returns
Type Description
boolean
Overrides

getParts()

public Iterable<Object> getParts()

Returns the parts in this key. Each part is represented by the corresponding Cloud Spanner type's canonical Java type, as listed below. Note that other types supported by #of(Object...) are converted to one of the canonical types.

  • BOOL is represented by Boolean
  • INT64 is represented by Long
  • FLOAT64 is represented by Double
  • NUMERIC is represented by BigDecimal
  • STRING is represented by String
  • JSON is represented by String
  • BYTES is represented by ByteArray
  • TIMESTAMP is represented by Timestamp
  • DATE is represented by Date
Returns
Type Description
Iterable<Object>

an unmodifiable list containing the key parts

hashCode()

public int hashCode()
Returns
Type Description
int
Overrides

size()

public int size()

Returns the number of parts in this key, including null values.

Returns
Type Description
int

toBuilder()

public Key.Builder toBuilder()

Returns a builder initialized with the value of this key.

Returns
Type Description
Key.Builder

toString()

public String toString()
Returns
Type Description
String
Overrides