visad.data
Class FormNode

java.lang.Object
  visad.data.FormNode

Direct Known Subclasses:

Form, FormFamily

public abstract class FormNode
extends Object

A node in the data form hierarchy for the storage of persistent data. This class implements the "composite" design pattern; the node will actually be either a "Form" or a "FormFamily".

Constructor Summary

FormNode(String name)
Construct a data-form node with the given name.

Method Summary

abstract void	add(String id, Data data, boolean replace) Add data to an existing data object.
abstract FormNode	getForms(Data data) Return the data forms that are compatible with a data object.
String	getName() Return the name of this node.
abstract DataImpl	open(String id) Open an existing data object.
abstract DataImpl	open(URL url) Open a data object specified as a URL.
abstract void	save(String id, Data data, boolean replace) Save a VisAD data object in this form.

Methods inherited from class java.lang.Object

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

Constructor Detail

FormNode

public FormNode(String name)

Construct a data-form node with the given name.

Method Detail

getName

public String getName()

Return the name of this node.

save

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

Save a VisAD data object in this form.

Throws:

BadFormException

IOException

RemoteException

VisADException

add

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

Add data to an existing data object.

Throws:

BadFormException

open

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

Open an existing data object.

Throws:

BadFormException

IOException

VisADException

open

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

Open a data object specified as a URL.

Throws:

BadFormException

VisADException

IOException

getForms

public abstract FormNode getForms(Data data)
                           throws VisADException,
                                  RemoteException,
                                  IOException

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

Throws:

VisADException

RemoteException

IOException