stsci.factory
Class Factory

java.lang.Object
  |
  +--stsci.factory.Factory

Direct Known Subclasses:

ADfactory, WebFactory

public abstract class Factory

extends java.lang.Object

Read objects from a text file on disk. This is an abstract class - the nextObj method is abstract and must be implemented by any concrete subclass.

Field Summary

protected java.io.BufferedReader	dstream
protected boolean	finished
protected java.lang.String	name
protected boolean	opened

Constructor Summary

Factory()
Default constructor is needed for subclasses.

Factory(java.lang.String fn)
Open the given filenam - calls openDisk.

Method Summary

boolean	finished() Is the factory exhausted.
abstract java.lang.Object	nextObj() The abstract method to consume input from dstream and create the next object.
void	open() This should open the factory for reading.
protected boolean	openDisk(java.lang.String fn)
void	setFinished()

Methods inherited from class java.lang.Object

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

Field Detail

name

protected java.lang.String name

finished

protected boolean finished

opened

protected boolean opened

dstream

protected java.io.BufferedReader dstream

Constructor Detail

Factory

public Factory(java.lang.String fn)

Open the given filenam - calls openDisk.

Factory

public Factory()

Default constructor is needed for subclasses.

Method Detail

openDisk

protected boolean openDisk(java.lang.String fn)

nextObj

public abstract java.lang.Object nextObj()
                                  throws java.lang.Exception

The abstract method to consume input from dstream and create the next object. This is specific to the particular type of input and must be implemented by the subclass.

open

public void open()

This should open the factory for reading. This is overridden by speicalist factories.

finished

public boolean finished()

Is the factory exhausted. typically a client will have a while !finished loop on the factory. In this case this will be when the dstream is no longer ready.

setFinished

public void setFinished()