net.openhft.chronicle.hash

Interface Data<V>

Type Parameters:

V - type of the accessed objects

All Known Implementing Classes:

AbstractData, CompiledMapIterationContext.EntryKeyBytesData, CompiledMapIterationContext.EntryValueBytesData, CompiledMapIterationContext.WrappedValueInstanceData, CompiledMapQueryContext.EntryKeyBytesData, CompiledMapQueryContext.EntryValueBytesData, CompiledMapQueryContext.InputFirstValueBytesData, CompiledMapQueryContext.InputKeyBytesData, CompiledMapQueryContext.InputKeyInstanceData, CompiledMapQueryContext.InputSecondValueBytesData, CompiledMapQueryContext.InputValueInstanceData, CompiledMapQueryContext.WrappedValueInstanceData, CompiledReplicatedMapIterationContext.DummyValueZeroData, CompiledReplicatedMapIterationContext.EntryKeyBytesData, CompiledReplicatedMapIterationContext.EntryValueBytesData, CompiledReplicatedMapIterationContext.WrappedValueInstanceData, CompiledReplicatedMapQueryContext.DummyValueZeroData, CompiledReplicatedMapQueryContext.EntryKeyBytesData, CompiledReplicatedMapQueryContext.EntryValueBytesData, CompiledReplicatedMapQueryContext.InputFirstValueBytesData, CompiledReplicatedMapQueryContext.InputKeyBytesData, CompiledReplicatedMapQueryContext.InputKeyInstanceData, CompiledReplicatedMapQueryContext.InputSecondValueBytesData, CompiledReplicatedMapQueryContext.InputValueInstanceData, CompiledReplicatedMapQueryContext.ReplicatedInputKeyBytesData, CompiledReplicatedMapQueryContext.ReplicatedInputValueBytesData, CompiledReplicatedMapQueryContext.WrappedValueInstanceData, net.openhft.chronicle.hash.impl.CopyingInstanceData

public interface Data<V>

Dual bytes/object access to keys/values/elements.

Bytes access: bytes() + offset() + size().

Object access: get().

In most cases, each particular value wraps either some object or some bytes. Object is marshalled to bytes lazily on demand, and bytes are lazily deserialized to object, accordingly.

Method Summary

Modifier and Type	Method and Description
RandomDataInput	bytes()
static boolean	bytesEquivalent(Data<?> d1, Data<?> d2)
default boolean	equivalent(RandomDataInput source, long sourceOffset)
V	get() Returns "cached" object, generally not eligible for using outside some context, or a block, synchronized with locks, or lambda, etc.
V	getUsing(V usingInstance) Reads the object from the value's bytes, trying to reuse the given object (might be null).
default long	hash(LongHashFunction f)
long	offset() Returns the offset to the value's bytes.
long	size() Returns the size of the value's bytes.
default void	writeTo(RandomDataOutput target, long targetOffset)

Method Detail

bytes

RandomDataInput bytes()

offset

long offset()

Returns the offset to the value's bytes.

size

long size()

Returns the size of the value's bytes.

hash

default long hash(LongHashFunction f)

equivalent

default boolean equivalent(RandomDataInput source,
                           long sourceOffset)

writeTo

default void writeTo(RandomDataOutput target,
                     long targetOffset)

get

V get()

Returns "cached" object, generally not eligible for using outside some context, or a block, synchronized with locks, or lambda, etc.

If the Data is object wrapper -- this method just returns this object.

getUsing

V getUsing(@Nullable
           V usingInstance)

Reads the object from the value's bytes, trying to reuse the given object (might be null).

bytesEquivalent

static boolean bytesEquivalent(Data<?> d1,
                               Data<?> d2)