Package org.aspectj.org.eclipse.jdt.internal.core.nd.field

Class FieldManyToOne<T extends INdStruct>

java.lang.Object

org.aspectj.org.eclipse.jdt.internal.core.nd.field.FieldManyToOne<T>

All Implemented Interfaces:

IDestructableField, IField, IRefCountedField

public class FieldManyToOne<T extends INdStruct>
extends Object
implements IDestructableField, IRefCountedField

Holds the n side of a n..1 relationship. Declares a Nd field which is a pointer of a NdNode of the specified type. FieldManyToOne forms a one-to-many relationship with FieldOneToMany. Whenever a FieldManyToOne points to an object, the inverse pointer is automatically inserted into the matching back pointer list.

Field Summary

Fields

Modifier and Type	Field	Description
static FieldInt	BACKPOINTER_INDEX
protected int	offset
boolean	pointsToOwner	True iff the other end of this pointer should delete this object when its end of the pointer is cleared.
static FieldPointer	TARGET

Method Summary

Modifier and Type	Method	Description
static <T extends INdStruct, B extends INdStruct> FieldManyToOne<T>	create(StructDef<B> builder, FieldOneToMany<B> forwardPointer)
static <T extends INdStruct, B extends INdStruct> FieldManyToOne<T>	createNonNull(StructDef<B> builder, FieldOneToMany<B> forwardPointer)
static <T extends INdStruct, B extends INdStruct> FieldManyToOne<T>	createOwner(StructDef<B> builder, FieldOneToMany<B> forwardPointer)	Creates a many-to-one pointer which points to this object's owner.
void	destruct(Nd nd, long address)
protected void	detachFromOldTarget(Nd nd, long address, long oldTargetAddress)
T	get(Nd nd, long address)
long	getAddress(Nd nd, long address)
String	getFieldName()	Returns the name of the field.
int	getOffset()	Returns the field offset, in bytes from the start of the struct.
int	getRecordSize()	Returns the size of the field, in bytes.
boolean	hasReferences(Nd nd, long address)	Returns true if this field knows of any remaining incoming references to this object.
FieldManyToOne<T>	permitNull(boolean permitted)	Sets whether or not this field permits nulls to be assigned.
void	put(Nd nd, long address, long newTargetAddress)
void	put(Nd nd, long address, T value)	Directs this pointer to the given target.
protected void	setFieldName(String fieldName)
void	setOffset(int offset)	Sets the field offset (bytes from the start of the struct).

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.aspectj.org.eclipse.jdt.internal.core.nd.field.IField

getAlignment

Field Details

TARGET

public static final FieldPointer TARGET

BACKPOINTER_INDEX

public static final FieldInt BACKPOINTER_INDEX

pointsToOwner

public final boolean pointsToOwner

True iff the other end of this pointer should delete this object when its end of the pointer is cleared.

offset

protected int offset

Method Details

createNonNull

public static <T extends INdStruct,
B extends INdStruct>
FieldManyToOne<T> createNonNull(StructDef<B> builder,
 FieldOneToMany<B> forwardPointer)

create

public static <T extends INdStruct,
B extends INdStruct>
FieldManyToOne<T> create(StructDef<B> builder,
 FieldOneToMany<B> forwardPointer)

createOwner

public static <T extends INdStruct,
B extends INdStruct>
FieldManyToOne<T> createOwner(StructDef<B> builder,
 FieldOneToMany<B> forwardPointer)

Creates a many-to-one pointer which points to this object's owner. If the pointer is non-null when the owner is deleted, this object will be deleted too.

Parameters:

builder - the struct to which the field will be added

forwardPointer - the field which holds the pointer in the other direction

Returns:

a newly constructed field

permitNull

public FieldManyToOne<T> permitNull(boolean permitted)

Sets whether or not this field permits nulls to be assigned.

Parameters:

permitted - true iff the field permits nulls

Returns:

this

get

public T get(Nd nd,
 long address)

getAddress

public long getAddress(Nd nd,
 long address)

put

public void put(Nd nd,
 long address,
 T value)

Directs this pointer to the given target. Also removes this pointer from the old backpointer list (if any) and inserts it into the new backpointer list (if any)

put

public void put(Nd nd,
 long address,
 long newTargetAddress)

detachFromOldTarget

protected void detachFromOldTarget(Nd nd,
 long address,
 long oldTargetAddress)

destruct

public void destruct(Nd nd,
 long address)

Specified by:

destruct in interface IDestructableField

getRecordSize

public int getRecordSize()

Description copied from interface: IField

Returns the size of the field, in bytes.

Specified by:

getRecordSize in interface IField

hasReferences

public boolean hasReferences(Nd nd,
 long address)

Description copied from interface: IRefCountedField

Returns true if this field knows of any remaining incoming references to this object. This is used by the implementation of FieldManyToOne to determine whether or not a refcounted object should be deleted after a reference is removed.

Implementations should return false if the refcount is 0 or true if the refcount is nonzero.

Specified by:

hasReferences in interface IRefCountedField

setFieldName

protected final void setFieldName(String fieldName)

setOffset

public final void setOffset(int offset)

Description copied from interface: IField

Sets the field offset (bytes from the start of the struct). This is invoked some time after field construction, after the sizes of all preceeding fields are known.

Specified by:

setOffset in interface IField

getOffset

public final int getOffset()

Description copied from interface: IField

Returns the field offset, in bytes from the start of the struct.

Specified by:

getOffset in interface IField

getFieldName

public final String getFieldName()

Description copied from interface: IField

Returns the name of the field. This is mainly used for error messages, debug output, and diagnostic tools. Meant to be programmer-readable but not user-readable.

Specified by:

getFieldName in interface IField