Package com.sun.jna

Class PointerType

java.lang.Object

com.sun.jna.PointerType

All Implemented Interfaces:

NativeMapped

Direct Known Subclasses:

ByReference, COMInvoker, CoreFoundation.CFTypeRef, Ddeml.HCONV, Ddeml.HCONVLIST, Ddeml.HSZ, Guid.REFIID, IOKit.IOObject, Kstat2.Kstat2Handle, Kstat2.Kstat2Map, Kstat2.Kstat2MatcherList, Udev.UdevContext, Udev.UdevDevice, Udev.UdevEnumerate, Udev.UdevListEntry, WinDef.LPVOID, WinDef.PVOID, WinNT.HANDLE, WTypes.BSTR, WTypes.LPOLESTR, WTypes.LPSTR, WTypes.LPWSTR, X11.Display, X11.GC, X11.Screen, X11.Visual, X11.XImage

public abstract class PointerType
extends Object
implements NativeMapped

Type representing a type-safe native pointer. Derived classes may override the NativeMapped.fromNative(java.lang.Object, com.sun.jna.FromNativeContext) method, which should instantiate a new object (or look up an existing one) of the appropriate type.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	PointerType()	The default constructor wraps a NULL pointer.
protected	PointerType(Pointer p)	This constructor is typically used by fromNative(java.lang.Object, com.sun.jna.FromNativeContext) if generating a new object instance.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)	Instances of PointerType with identical pointers compare equal by default.
Object	fromNative(Object nativeValue, FromNativeContext context)	The default implementation simply creates a new instance of the class and assigns its pointer field.
Pointer	getPointer()	Returns the associated native Pointer.
int	hashCode()	The hash code for a PointerType is the same as that for its pointer.
Class<?>	nativeType()	Indicate the native type used by this converter.
void	setPointer(Pointer p)
Object	toNative()	Convert this object to its native type (a Pointer).
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

PointerType

protected PointerType()

The default constructor wraps a NULL pointer.

PointerType

protected PointerType(Pointer p)

This constructor is typically used by fromNative(java.lang.Object, com.sun.jna.FromNativeContext) if generating a new object instance.

Method Details

nativeType

public Class<?> nativeType()

Description copied from interface: NativeMapped

Indicate the native type used by this converter.

Specified by:

nativeType in interface NativeMapped

Returns:

Java class representation of the native type.

toNative

public Object toNative()

Convert this object to its native type (a Pointer).

Specified by:

toNative in interface NativeMapped

Returns:

Java representation of the original Java object converted to a native type.

getPointer

public Pointer getPointer()

Returns the associated native Pointer.

Returns:

Native pointer representation for this object.

setPointer

public void setPointer(Pointer p)

fromNative

public Object fromNative(Object nativeValue,
 FromNativeContext context)

The default implementation simply creates a new instance of the class and assigns its pointer field. Override if you need different behavior, such as ensuring a single PointerType instance for each unique Pointer value, or instantiating a different PointerType subclass.

Specified by:

fromNative in interface NativeMapped

Parameters:

nativeValue - Java representation of the native type to be converted.

context - Context in which the conversion is taking place.

Returns:

Converted object.

hashCode

public int hashCode()

The hash code for a PointerType is the same as that for its pointer.

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Instances of PointerType with identical pointers compare equal by default.

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object