Package io.deephaven.engine.table.impl.util

Class FieldUtils

java.lang.Object

io.deephaven.engine.table.impl.util.FieldUtils

public class FieldUtils
extends Object

Utilities for manipulating object fields.

Constructor Summary

Constructors

Constructor	Description
FieldUtils()

Method Summary

Modifier and Type	Method	Description
static <FIELD_TYPE, INSTANCE_TYPE> FIELD_TYPE	ensureField(INSTANCE_TYPE instance, @NotNull AtomicReferenceFieldUpdater<INSTANCE_TYPE,FIELD_TYPE> updater, FIELD_TYPE defaultValue, @NotNull Supplier<FIELD_TYPE> valueFactory)	Ensure a field is initialized exactly once, and get the current value after possibly initializing it.

Methods inherited from class java.lang.Object

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

Constructor Details

FieldUtils

public FieldUtils()

Method Details

ensureField

public static <FIELD_TYPE,
INSTANCE_TYPE> FIELD_TYPE ensureField(INSTANCE_TYPE instance,
 @NotNull
 @NotNull AtomicReferenceFieldUpdater<INSTANCE_TYPE,FIELD_TYPE> updater,
 @Nullable
 FIELD_TYPE defaultValue,
 @NotNull
 @NotNull Supplier<FIELD_TYPE> valueFactory)

Ensure a field is initialized exactly once, and get the current value after possibly initializing it.

Parameters:

instance - The instance that owns the field

updater - An AtomicReferenceFieldUpdater associated with the field

defaultValue - The reference value that signifies that the field has not been initialized

valueFactory - A factory for new values; may be called concurrently by multiple threads as they race to initialize the field

Returns:

The initialized value of the field