visad.data.jai
Class JAIForm

java.lang.Object
  visad.data.FormNode
      visad.data.Form
          visad.data.jai.JAIForm

All Implemented Interfaces:

FormFileInformer

public class JAIForm
extends Form
implements FormFileInformer

JAIForm is the VisAD data form for image formats supported by the Java Advanced Imaging API: BMP, GIF, FlashPix, JPEG, PNG, PNM, and TIFF.

Field Summary

Fields inherited from class visad.data.Form

mathType

Constructor Summary

JAIForm()
Constructs a new JAI file form.

Method Summary

void	add(String id, Data data, boolean replace) Adds data to an existing JAI image file.
String[]	getDefaultSuffixes() Returns the default file suffixes for the JAI image file formats.
FormNode	getForms(Data data) Return the data forms that are compatible with a data object.
boolean	isThisType(byte[] block) Checks if the given block is a valid header for a JAI image file.
boolean	isThisType(String name) Checks if the given string is a valid filename for a JAI image file.
static void	main(String[] args) Run 'java visad.data.visad.JAIForm in_file' to test read an image file supported by Java Advanced Imaging.
DataImpl	open(String id) Opens an existing JAI image file from the given location.
DataImpl	open(URL url) Opens an existing JAI image file from the given URL.
void	save(String id, Data data, boolean replace) Saves a VisAD Data object to a JAI image format at the given location.

Methods inherited from class visad.data.Form

getMathType

Methods inherited from class visad.data.FormNode

getName

Methods inherited from class java.lang.Object

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

Constructor Detail

JAIForm

public JAIForm()

Constructs a new JAI file form.

Method Detail

isThisType

public boolean isThisType(String name)

Checks if the given string is a valid filename for a JAI image file.

Specified by:

isThisType in interface FormFileInformer

Parameters:

name - name of the file

Returns:

true if the name is right for this type of form

isThisType

public boolean isThisType(byte[] block)

Checks if the given block is a valid header for a JAI image file.

Specified by:

isThisType in interface FormFileInformer

Parameters:

block - block of bytes from file

Returns:

true if the magic number is right

getDefaultSuffixes

public String[] getDefaultSuffixes()

Returns the default file suffixes for the JAI image file formats.

Specified by:

getDefaultSuffixes in interface FormFileInformer

Returns:

array of suffixes

save

public void save(String id,
                 Data data,
                 boolean replace)
          throws BadFormException,
                 IOException,
                 RemoteException,
                 VisADException

Saves a VisAD Data object to a JAI image format at the given location.

Specified by:

save in class FormNode

Throws:

BadFormException - Always thrown (method is not implemented).

IOException

RemoteException

VisADException

add

public void add(String id,
                Data data,
                boolean replace)
         throws BadFormException

Adds data to an existing JAI image file.

Specified by:

add in class FormNode

Throws:

BadFormException - Always thrown (method is not implemented).

open

public DataImpl open(String id)
              throws BadFormException,
                     IOException,
                     VisADException

Opens an existing JAI image file from the given location.

Specified by:

open in class FormNode

Returns:

VisAD Data object containing JAI image data.

Throws:

BadFormException

IOException

VisADException

open

public DataImpl open(URL url)
              throws BadFormException,
                     IOException,
                     VisADException

Opens an existing JAI image file from the given URL.

Specified by:

open in class FormNode

Returns:

VisAD Data object containing JAI image data.

Throws:

BadFormException

IOException

VisADException

getForms

public FormNode getForms(Data data)

Description copied from class: FormNode

Return the data forms that are compatible with a data object.

Specified by:

getForms in class FormNode

main

public static void main(String[] args)
                 throws VisADException,
                        RemoteException,
                        IOException

Run 'java visad.data.visad.JAIForm in_file' to test read an image file supported by Java Advanced Imaging.

Throws:

VisADException

RemoteException

IOException