com.apple.mrj.jdirect
Class HandleStruct

java.lang.Object
  |
  +--com.apple.mrj.jdirect.Struct
        |
        +--com.apple.mrj.jdirect.HandleStruct

public abstract class HandleStruct

extends Struct

HandleStruct is the base class for Struct classes which store their C structs as MacOS relocatable heap blocks (e.g. PixMapHandle).

Field Summary

protected int

handle The data for these Structs is stored in the MacOS heap.

Constructor Summary

protected

HandleStruct(int handle) Construct a HandleStruct which wraps a C relocatable struct

Method Summary

boolean	equals(Object anObject) Returns true if both java objects reference the same MacOS heap handle
protected boolean	getBooleanAt(int offset)
protected byte	getByteAt(int offset)
byte[]	getBytes()
byte[]	getBytesAt(int byteOffset, int byteCount)
protected char	getCharAt(int offset)
protected double	getDoubleAt(int offset)
protected float	getFloatAt(int offset)
int	getHandle() Returns the handle held by the HandleStruct.
protected int	getIntAt(int offset)
protected long	getLongAt(int offset)
protected short	getShortAt(int offset)
abstract int	getSize()
protected void	setBooleanAt(int offset, boolean value)
protected void	setByteAt(int offset, byte value)
protected void	setBytesAt(int byteOffset, byte[] source)
protected void	setCharAt(int offset, char value)
protected void	setDoubleAt(int offset, double value)
protected void	setFloatAt(int offset, float value)
protected void	setIntAt(int offset, int value)
protected void	setLongAt(int offset, long value)
protected void	setShortAt(int offset, short value)
protected void	setStructAt(int byteOffset, Struct src)

Methods inherited from class java.lang.Object

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

Field Detail

handle

protected int handle

The data for these Structs is stored in the MacOS heap. This int holds the MacOS Handle to the C struct.

Constructor Detail

HandleStruct

protected HandleStruct(int handle)

Construct a HandleStruct which wraps a C relocatable struct

Parameters:

handle - the MacOS memory Handle

Method Detail

getBooleanAt

protected final boolean getBooleanAt(int offset)

Overrides:

getBooleanAt in class Struct

getByteAt

protected final byte getByteAt(int offset)

Overrides:

getByteAt in class Struct

getCharAt

protected final char getCharAt(int offset)

Overrides:

getCharAt in class Struct

getShortAt

protected final short getShortAt(int offset)

Overrides:

getShortAt in class Struct

getIntAt

protected final int getIntAt(int offset)

Overrides:

getIntAt in class Struct

getLongAt

protected final long getLongAt(int offset)

Overrides:

getLongAt in class Struct

getFloatAt

protected final float getFloatAt(int offset)

Overrides:

getFloatAt in class Struct

getDoubleAt

protected final double getDoubleAt(int offset)

Overrides:

getDoubleAt in class Struct

setBooleanAt

protected final void setBooleanAt(int offset,
                                  boolean value)

Overrides:

setBooleanAt in class Struct

setByteAt

protected final void setByteAt(int offset,
                               byte value)

Overrides:

setByteAt in class Struct

setCharAt

protected final void setCharAt(int offset,
                               char value)

Overrides:

setCharAt in class Struct

setShortAt

protected final void setShortAt(int offset,
                                short value)

Overrides:

setShortAt in class Struct

setIntAt

protected final void setIntAt(int offset,
                              int value)

Overrides:

setIntAt in class Struct

setLongAt

protected final void setLongAt(int offset,
                               long value)

Overrides:

setLongAt in class Struct

setFloatAt

protected final void setFloatAt(int offset,
                                float value)

Overrides:

setFloatAt in class Struct

setDoubleAt

protected final void setDoubleAt(int offset,
                                 double value)

Overrides:

setDoubleAt in class Struct

setBytesAt

protected void setBytesAt(int byteOffset,
                          byte[] source)

Overrides:

setBytesAt in class Struct

setStructAt

protected void setStructAt(int byteOffset,
                           Struct src)

Overrides:

setStructAt in class Struct

getBytesAt

public byte[] getBytesAt(int byteOffset,
                         int byteCount)

Overrides:

getBytesAt in class Struct

getBytes

public byte[] getBytes()

Overrides:

getBytes in class Struct

getSize

public abstract int getSize()

Overrides:

getSize in class Struct

getHandle

public final int getHandle()

Returns the handle held by the HandleStruct.

Returns:

a raw MacOS Handle

equals

public boolean equals(Object anObject)

Returns true if both java objects reference the same MacOS heap handle

Overrides:

equals in class Object

See Also:

Object.equals(java.lang.Object)