com.oracle.graal.pointsto.heap.value

Interface ValueSupplier<V>

All Known Implementing Classes:

EagerValueSupplier, LazyValueSupplier

public interface ValueSupplier<V>

Interface for accessing hosted heap values. It provides mechanisms for accessing hosted heap values either eagerly or lazily.

Eager heap values are objects whose state doesn't change during heap snapshotting. Their value is immediately available.

Lazy heap values are objects whose state can change during heap snapshotting, therefore reading the actual value is delayed. Instead, both a value supplier and an availability supplier are installed. The implementation guarantees that the value is indeed available, by checking the availability supplier, before it attempts to retrieve it.

Method Summary

Modifier and Type	Method and Description
static <V> ValueSupplier<V>	eagerValue(V value)
V	get() Retrieves the value, if available.
boolean	isAvailable() Checks if the value is available.
static <V> ValueSupplier<V>	lazyValue(Supplier<V> valueSupplier, BooleanSupplier isAvailable)

Method Detail

eagerValue

static <V> ValueSupplier<V> eagerValue(V value)

lazyValue

static <V> ValueSupplier<V> lazyValue(Supplier<V> valueSupplier,
                                      BooleanSupplier isAvailable)

isAvailable

boolean isAvailable()

Checks if the value is available.

get

V get()

Retrieves the value, if available. Attempting to access a value before it is available results in error.