Package com.google.gerrit.server.rules

Class StoredValue<T>

java.lang.Object

com.google.gerrit.server.rules.StoredValue<T>

public class StoredValue<T>
extends Object

Defines a value cached in a PrologEnvironment.

See Also:

StoredValues

Constructor Summary

Constructors

Constructor	Description
StoredValue()	Initializes a stored value key with a new unique key.
StoredValue(Object key)	Initialize a stored value key using any Java Object.

Method Summary

Modifier and Type	Method	Description
static <T> StoredValue<T>	create()	Construct a new unique key that does not match any other key.
static <T> StoredValue<T>	create(Class<T> clazz)	Construct a key based on a Java Class object, useful for singletons.
protected T	createValue(com.googlecode.prolog_cafe.lang.Prolog engine)	Creates a value to store, returns null by default.
T	get(PrologEnvironment env)	Perform getOrNull(Prolog) on the environment's interpreter.
T	get(com.googlecode.prolog_cafe.lang.Prolog engine)	Get the value from the engine, or throw SystemException.
T	getOrNull(com.googlecode.prolog_cafe.lang.Prolog engine)	Look up the value in the engine, or return null.
void	set(PrologEnvironment env, T obj)	Set the value into the environment's interpreter.
void	set(com.googlecode.prolog_cafe.lang.Prolog engine, T obj)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StoredValue

public StoredValue(Object key)

Initialize a stored value key using any Java Object.

Parameters:

key - unique identity of the stored value. This will be the hash key in the Prolog Environments's hash map.

StoredValue

public StoredValue()

Initializes a stored value key with a new unique key.

Method Detail

create

public static <T> StoredValue<T> create()

Construct a new unique key that does not match any other key.

create

public static <T> StoredValue<T> create(Class<T> clazz)

Construct a key based on a Java Class object, useful for singletons.

getOrNull

public T getOrNull(com.googlecode.prolog_cafe.lang.Prolog engine)

Look up the value in the engine, or return null.

get

public T get(com.googlecode.prolog_cafe.lang.Prolog engine)

Get the value from the engine, or throw SystemException.

set

public void set(com.googlecode.prolog_cafe.lang.Prolog engine,
                T obj)

get

public T get(PrologEnvironment env)

Perform getOrNull(Prolog) on the environment's interpreter.

set

public void set(PrologEnvironment env,
                T obj)

Set the value into the environment's interpreter.

createValue

protected T createValue(com.googlecode.prolog_cafe.lang.Prolog engine)

Creates a value to store, returns null by default.

Parameters:

engine - Prolog engine.

Returns:

new value.