ValueGenerationStrategy (DataNucleus Core 5.1.13-SNAPSHOT API)

java.lang.Object
- org.datanucleus.metadata.ValueGenerationStrategy

All Implemented Interfaces:

Serializable
```
public class ValueGenerationStrategy
extends Object
implements Serializable
```
Value generation "strategy". Would have been nice to have this as an enum, but we need to allow for CUSTOM types

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type	Field and Description
`static ValueGenerationStrategy`	`AUID` The value "auid" specifies a strategy that is a Java implementation of DCE UUIDs, and represents the results as a 36-character String.
`static ValueGenerationStrategy`	`CUSTOM` Extension strategy, that will have the "customName" set to the chosen strategy.
`static ValueGenerationStrategy`	`IDENTITY` The value "identity" specifies that the column identified as the key column is managed by the database as an auto-incrementing identity type.
`static ValueGenerationStrategy`	`INCREMENT` The value "increment" specifies a strategy that simply finds the largest key already in the database and increments the key value for new instances.
`static ValueGenerationStrategy`	`NATIVE` The value "native" allows the JDO implementation to pick the most suitable strategy based on the underlying database.
`static ValueGenerationStrategy`	`SEQUENCE` The value "sequence" specifies that a named database sequence is used to generate key values for the table.
`static ValueGenerationStrategy`	`TIMESTAMP` The value "timestamp" specifies a strategy that uses the Java "Timestamp" class, and represents the results as a Timestamp object.
`static ValueGenerationStrategy`	`TIMESTAMP_VALUE` The value "timestamp-value" specifies a strategy that uses the Java "Timestamp" class, and represents the results as a Long.
`static ValueGenerationStrategy`	`UUID` The value "uuid" specifies a strategy that uses the Java "UUID" class, and represents the results as a 36-character String.
`static ValueGenerationStrategy`	`UUID_OBJECT` The value "uuid-object" specifies a strategy that uses the Java "UUID" class, and represents the results as a UUID object.
`static ValueGenerationStrategy`	`UUIDHEX` The value "uuid-hex" specifies a strategy that generates a 128-bit UUID unique within a network, and represents the result as a 32-character String.
`static ValueGenerationStrategy`	`UUIDSTRING` The value "uuid-string" specifies a strategy that generates a 128-bit UUID unique within a network, and represents the result as a 16-character String.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`equals(Object o)`
`String`	`getCustomName()` Accessor for the custom name (if using strategy type of CUSTOM).
`static ValueGenerationStrategy`	`getIdentityStrategy(String value)` Gets an IdentityStrategy for the given value argument.
`int`	`getType()` Accessor for the type.
`int`	`hashCode()`
`String`	`toString()` Returns a string representation of the object.

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

- Field Detail
  - NATIVE
```
public static final ValueGenerationStrategy NATIVE
```
    The value "native" allows the JDO implementation to pick the most suitable strategy based on the underlying database.
  - SEQUENCE
```
public static final ValueGenerationStrategy SEQUENCE
```
    The value "sequence" specifies that a named database sequence is used to generate key values for the table.
  - IDENTITY
```
public static final ValueGenerationStrategy IDENTITY
```
    The value "identity" specifies that the column identified as the key column is managed by the database as an auto-incrementing identity type.
  - INCREMENT
```
public static final ValueGenerationStrategy INCREMENT
```
    The value "increment" specifies a strategy that simply finds the largest key already in the database and increments the key value for new instances.
  - UUIDSTRING
```
public static final ValueGenerationStrategy UUIDSTRING
```
    The value "uuid-string" specifies a strategy that generates a 128-bit UUID unique within a network, and represents the result as a 16-character String.
  - UUIDHEX
```
public static final ValueGenerationStrategy UUIDHEX
```
    The value "uuid-hex" specifies a strategy that generates a 128-bit UUID unique within a network, and represents the result as a 32-character String.
  - AUID
```
public static final ValueGenerationStrategy AUID
```
    The value "auid" specifies a strategy that is a Java implementation of DCE UUIDs, and represents the results as a 36-character String.
  - UUID
```
public static final ValueGenerationStrategy UUID
```
    The value "uuid" specifies a strategy that uses the Java "UUID" class, and represents the results as a 36-character String.
  - UUID_OBJECT
```
public static final ValueGenerationStrategy UUID_OBJECT
```
    The value "uuid-object" specifies a strategy that uses the Java "UUID" class, and represents the results as a UUID object.
  - TIMESTAMP
```
public static final ValueGenerationStrategy TIMESTAMP
```
    The value "timestamp" specifies a strategy that uses the Java "Timestamp" class, and represents the results as a Timestamp object.
  - TIMESTAMP_VALUE
```
public static final ValueGenerationStrategy TIMESTAMP_VALUE
```
    The value "timestamp-value" specifies a strategy that uses the Java "Timestamp" class, and represents the results as a Long.
  - CUSTOM
```
public static final ValueGenerationStrategy CUSTOM
```
    Extension strategy, that will have the "customName" set to the chosen strategy.
- Method Detail
  - getCustomName
```
public String getCustomName()
```
    Accessor for the custom name (if using strategy type of CUSTOM).
    
    Returns:
    
    Custom name
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - equals
```
public boolean equals(Object o)
```
    Overrides:
    
    equals in class Object
  - toString
```
public String toString()
```
    Returns a string representation of the object.
    
    Overrides:
    
    toString in class Object
    
    Returns:
    
    a string representation of the object.
  - getType
```
public int getType()
```
    Accessor for the type.
    
    Returns:
    
    Type
  - getIdentityStrategy
```
public static ValueGenerationStrategy getIdentityStrategy(String value)
```
    Gets an IdentityStrategy for the given value argument.
    
    Parameters:
    
    value - the String representation of IdentityStrategy
    
    Returns:
    
    the IdentityStrategy corresponding to the value argument. NATIVE IdentityStrategy is returned if the value argument is null or no corresponding strategy was found

Class ValueGenerationStrategy

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

NATIVE

SEQUENCE

IDENTITY

INCREMENT

UUIDSTRING

UUIDHEX

AUID

UUID

UUID_OBJECT

TIMESTAMP

TIMESTAMP_VALUE

CUSTOM

Method Detail

getCustomName

hashCode

equals

toString

getType

getIdentityStrategy