visad.data

Class DataNode

java.lang.Object

visad.data.DataNode

public abstract class DataNode
extends java.lang.Object

Abstract class for adapting a VisAD data object to the "Visitor" design pattern. This class knows how to traverse an arbitrary VisAD data object.

Method Summary

Modifier and Type	Method and Description
abstract DataVisitor	accept(DataVisitor visitor) Accept a visitor and traverse the data object.
static DataNode	create(Data data) Factory method for creating an instance of the appropriate type.

Methods inherited from class java.lang.Object

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

Method Detail

create

public static DataNode create(Data data)
                       throws UnimplementedException

Factory method for creating an instance of the appropriate type.

Parameters:

data - The VisAD data object to be traversed.

Returns:

A DataNode that knows how to traverse the VisAD data object.

Throws:

UnimplementedException - A (soon to be implemented) method isn't implemented yet.

accept

public abstract DataVisitor accept(DataVisitor visitor)
                            throws UnimplementedException,
                                   BadFormException,
                                   VisADException,
                                   java.rmi.RemoteException

Accept a visitor and traverse the data object.

Parameters:

visitor - The object that will have it's visit() method called for each subcomponent of the VisAD data object.

Returns:

visitor for convenience.

Throws:

UnimplementedException - A (soon to be implemented) method isn't implemented yet.

BadFormException - The VisAD data object doesn't "fit" the data model used by visitor.

VisADException - Problem in core VisAD (probably couldn't create some VisAD object).

java.rmi.RemoteException - Problem accessing the VisAD data object.

See Also:

DataVisitor