nom.tam.fits
Class FitsHeap

java.lang.Object
  nom.tam.fits.FitsHeap

All Implemented Interfaces:

FitsElement

public class FitsHeap
extends java.lang.Object
implements FitsElement

This class supports the FITS heap. This is currently used for variable length columns in binary tables.

Method Summary

void	getData(int offset, java.lang.Object array) Get data from the heap.
long	getFileOffset() Get the byte at which this element begins.
int	getOffset() Get the current offset within the heap.
long	getSize() The size of this element in bytes
void	read(ArrayDataInput str) Read the heap
void	rewrite() Attempt to rewrite the heap with the current contents.
boolean	rewriteable() Can this element be rewritten?
int	size()
void	write(ArrayDataOutput str) Write the heap

Methods inherited from class java.lang.Object

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

Method Detail

read

public void read(ArrayDataInput str)
          throws FitsException

Read the heap

Specified by:

read in interface FitsElement

Parameters:

str - The input source.

Throws:

FitsException

write

public void write(ArrayDataOutput str)
           throws FitsException

Write the heap

Specified by:

write in interface FitsElement

Parameters:

str - The data sink.

Throws:

FitsException

rewriteable

public boolean rewriteable()

Description copied from interface: FitsElement

Can this element be rewritten?

Specified by:

rewriteable in interface FitsElement

rewrite

public void rewrite()
             throws java.io.IOException,
                    FitsException

Attempt to rewrite the heap with the current contents. Note that no checking is done to make sure that the heap does not extend past its prior boundaries.

Specified by:

rewrite in interface FitsElement

Throws:

java.io.IOException

FitsException

getData

public void getData(int offset,
                    java.lang.Object array)
             throws FitsException

Get data from the heap.

Parameters:

offset - The offset at which the data begins.

array - The array to be extracted.

Throws:

FitsException

getOffset

public int getOffset()

Get the current offset within the heap.

size

public int size()

getSize

public long getSize()

Description copied from interface: FitsElement

The size of this element in bytes

Specified by:

getSize in interface FitsElement

getFileOffset

public long getFileOffset()

Description copied from interface: FitsElement

Get the byte at which this element begins. This is only available if the data is originally read from a random access medium.

Specified by:

getFileOffset in interface FitsElement