Class AbstractConstantEmptyArray

java.lang.Object

com.oracle.truffle.js.runtime.array.ScriptArray

com.oracle.truffle.js.runtime.array.DynamicArray

com.oracle.truffle.js.runtime.array.dyn.AbstractConstantArray

com.oracle.truffle.js.runtime.array.dyn.AbstractConstantEmptyArray

Direct Known Subclasses:

ConstantEmptyArray, ConstantEmptyPrototypeArray

public abstract class AbstractConstantEmptyArray
extends AbstractConstantArray

Nested Class Summary

Nested classes/interfaces inherited from class com.oracle.truffle.js.runtime.array.DynamicArray

DynamicArray.DynamicArrayCache

Nested classes/interfaces inherited from class com.oracle.truffle.js.runtime.array.ScriptArray

ScriptArray.CreateWritableProfileAccess, ScriptArray.DefaultIterator, ScriptArray.SetLengthProfileAccess

Field Summary

Fields inherited from class com.oracle.truffle.js.runtime.array.DynamicArray

cache, INTEGRITY_LEVEL_FROZEN, INTEGRITY_LEVEL_FROZEN_LENGTH_READONLY, INTEGRITY_LEVEL_MASK, INTEGRITY_LEVEL_NONE, INTEGRITY_LEVEL_NONE_LENGTH_READONLY, INTEGRITY_LEVEL_NOT_EXTENSIBLE, INTEGRITY_LEVEL_NOT_EXTENSIBLE_LENGTH_READONLY, INTEGRITY_LEVEL_SEALED, INTEGRITY_LEVEL_SEALED_LENGTH_READONLY, INTEGRITY_LEVELS, integrityLevel, LENGTH_NOT_WRITABLE, LENGTH_WRITABLE_MASK

Fields inherited from class com.oracle.truffle.js.runtime.array.ScriptArray

EMPTY_OBJECT_ARRAY

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractConstantEmptyArray(int integrityLevel, DynamicArray.DynamicArrayCache cache)

Method Summary

Modifier and Type	Method	Description
ScriptArray	addRangeImpl(JSDynamicObject object, long offset, int size)	This method grows the array by adding more elements of a given size.
Object	cloneArray(JSDynamicObject object)
AbstractDoubleArray	createWriteableDouble(JSDynamicObject object, long index, double value, com.oracle.truffle.api.nodes.Node node, ScriptArray.CreateWritableProfileAccess profile)
AbstractIntArray	createWriteableInt(JSDynamicObject object, long index, int value, com.oracle.truffle.api.nodes.Node node, ScriptArray.CreateWritableProfileAccess profile)
AbstractJSObjectArray	createWriteableJSObject(JSDynamicObject object, long index, JSDynamicObject value, com.oracle.truffle.api.nodes.Node node, ScriptArray.CreateWritableProfileAccess profile)
AbstractObjectArray	createWriteableObject(JSDynamicObject object, long index, Object value, com.oracle.truffle.api.nodes.Node node, ScriptArray.CreateWritableProfileAccess profile)
ScriptArray	deleteElementImpl(JSDynamicObject object, long index, boolean strict)
long	firstElementIndex(JSDynamicObject object)	First element index (inclusive).
protected static long	getCapacity(JSDynamicObject object)
Object	getElementInBounds(JSDynamicObject object, int index)
boolean	hasElement(JSDynamicObject object, long index)
boolean	hasHoles(JSDynamicObject object)	Returns true when this array actually has holes between ScriptArray.firstElementIndex(com.oracle.truffle.js.runtime.objects.JSDynamicObject) and ScriptArray.lastElementIndex(com.oracle.truffle.js.runtime.objects.JSDynamicObject).
boolean	isHolesType()	Returns true if this array type could have hole values in it.
long	lastElementIndex(JSDynamicObject object)	Last element index (inclusive).
final long	length(JSDynamicObject object)
final int	lengthInt(JSDynamicObject object)
long	nextElementIndex(JSDynamicObject object, long index)	Returns the next index.
List<Object>	ownPropertyKeys(JSDynamicObject object)
long	previousElementIndex(JSDynamicObject object, long index)	Returns the previous index.
ScriptArray	removeRangeImpl(JSDynamicObject object, long start, long end)	This function deletes all elements in the range from [start..end[.
protected static void	setCapacity(JSDynamicObject object, long length)
ScriptArray	setLengthImpl(JSDynamicObject object, long length, com.oracle.truffle.api.nodes.Node node, ScriptArray.SetLengthProfileAccess profile)

Methods inherited from class com.oracle.truffle.js.runtime.array.dyn.AbstractConstantArray

getElement, getElementInBounds, isInBoundsFast, setElementImpl

Methods inherited from class com.oracle.truffle.js.runtime.array.DynamicArray

createCache, freeze, isExtensible, isFrozen, isLengthNotWritable, isSealed, maybePreinitializeCache, preventExtensions, seal, setIntegrityLevel, setLengthNotWritable, toString, withIntegrityLevel

Methods inherited from class com.oracle.truffle.js.runtime.array.ScriptArray

addRange, asIterable, canDeleteElement, cast, createConstantArray, createConstantEmptyArray, deleteElement, hasHolesOrUnused, isInstance, makeMultiRangeList, makeRangeList, nextPower, ownPropertyKeysContiguous, ownPropertyKeysHoles, removeRange, removeRange, setElement, setLength, setLength, shiftRange, shiftRangeImpl, toArray, traceArrayTransition, traceWrite, valueIsByte

Methods inherited from class java.lang.Object

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

Constructor Details

AbstractConstantEmptyArray

protected AbstractConstantEmptyArray(int integrityLevel,
 DynamicArray.DynamicArrayCache cache)

Method Details

setCapacity

protected static void setCapacity(JSDynamicObject object,
 long length)

getCapacity

protected static long getCapacity(JSDynamicObject object)

getElementInBounds

public Object getElementInBounds(JSDynamicObject object,
 int index)

Specified by:

getElementInBounds in class AbstractConstantArray

length

public final long length(JSDynamicObject object)

Specified by:

length in class ScriptArray

lengthInt

public final int lengthInt(JSDynamicObject object)

Specified by:

lengthInt in class ScriptArray

cloneArray

public Object cloneArray(JSDynamicObject object)

Specified by:

cloneArray in class DynamicArray

hasElement

public boolean hasElement(JSDynamicObject object,
 long index)

Specified by:

hasElement in class ScriptArray

Returns:

true if array has an element (not a hole) at this index.

deleteElementImpl

public ScriptArray deleteElementImpl(JSDynamicObject object,
 long index,
 boolean strict)

Specified by:

deleteElementImpl in class ScriptArray

firstElementIndex

public long firstElementIndex(JSDynamicObject object)

Description copied from class: ScriptArray

First element index (inclusive).

Overrides:

firstElementIndex in class AbstractConstantArray

lastElementIndex

public long lastElementIndex(JSDynamicObject object)

Description copied from class: ScriptArray

Last element index (inclusive).

Overrides:

lastElementIndex in class AbstractConstantArray

nextElementIndex

public long nextElementIndex(JSDynamicObject object,
 long index)

Description copied from class: ScriptArray

Returns the next index. The index is guaranteed either to exist, or be MAX_SAFE_INTEGER. Reason for MAX_SAFE_INTEGER is: this array could be the prototype of another one; returning the length() of this array would be wrong, if the inheriting array is longer, but has a hole at length().

Overrides:

nextElementIndex in class AbstractConstantArray

previousElementIndex

public long previousElementIndex(JSDynamicObject object,
 long index)

Description copied from class: ScriptArray

Returns the previous index. The index is guaranteed either to exist, or be smaller than firstElementIndex().

Overrides:

previousElementIndex in class AbstractConstantArray

createWriteableInt

public AbstractIntArray createWriteableInt(JSDynamicObject object,
 long index,
 int value,
 com.oracle.truffle.api.nodes.Node node,
 ScriptArray.CreateWritableProfileAccess profile)

Specified by:

createWriteableInt in class AbstractConstantArray

createWriteableDouble

public AbstractDoubleArray createWriteableDouble(JSDynamicObject object,
 long index,
 double value,
 com.oracle.truffle.api.nodes.Node node,
 ScriptArray.CreateWritableProfileAccess profile)

Specified by:

createWriteableDouble in class AbstractConstantArray

createWriteableJSObject

public AbstractJSObjectArray createWriteableJSObject(JSDynamicObject object,
 long index,
 JSDynamicObject value,
 com.oracle.truffle.api.nodes.Node node,
 ScriptArray.CreateWritableProfileAccess profile)

Specified by:

createWriteableJSObject in class AbstractConstantArray

createWriteableObject

public AbstractObjectArray createWriteableObject(JSDynamicObject object,
 long index,
 Object value,
 com.oracle.truffle.api.nodes.Node node,
 ScriptArray.CreateWritableProfileAccess profile)

Specified by:

createWriteableObject in class AbstractConstantArray

setLengthImpl

public ScriptArray setLengthImpl(JSDynamicObject object,
 long length,
 com.oracle.truffle.api.nodes.Node node,
 ScriptArray.SetLengthProfileAccess profile)

Specified by:

setLengthImpl in class ScriptArray

removeRangeImpl

public ScriptArray removeRangeImpl(JSDynamicObject object,
 long start,
 long end)

Description copied from class: ScriptArray

This function deletes all elements in the range from [start..end[. This is equivalent to shifting the whole array, starting with element index end, by end-start positions to the left. Can be used by e.g. Array.prototype.splice;

Specified by:

removeRangeImpl in class ScriptArray

addRangeImpl

public ScriptArray addRangeImpl(JSDynamicObject object,
 long offset,
 int size)

Description copied from class: ScriptArray

This method grows the array by adding more elements of a given size. An offset parameter can be used to specify where the new elements have to be added (starting from zero). The operation is equivalent to shifting (right) the whole array or its part as defined by the offset parameter.

Specified by:

addRangeImpl in class ScriptArray

Parameters:

offset - starting offset position

size - size of the inserted empty array

Returns:

a ScriptArray instance with the new size

isHolesType

public boolean isHolesType()

Description copied from class: ScriptArray

Returns true if this array type could have hole values in it. Doesn't tell whether it actually HAS holes.

Overrides:

isHolesType in class ScriptArray

hasHoles

public boolean hasHoles(JSDynamicObject object)

Description copied from class: ScriptArray

Returns true when this array actually has holes between ScriptArray.firstElementIndex(com.oracle.truffle.js.runtime.objects.JSDynamicObject) and ScriptArray.lastElementIndex(com.oracle.truffle.js.runtime.objects.JSDynamicObject). Implies ScriptArray.isHolesType().

Overrides:

hasHoles in class AbstractConstantArray

See Also:

• ScriptArray.hasHolesOrUnused(com.oracle.truffle.js.runtime.objects.JSDynamicObject)

ownPropertyKeys

public List<Object> ownPropertyKeys(JSDynamicObject object)

Overrides:

ownPropertyKeys in class ScriptArray