uk.ac.starlink.connect

Class ErrorLeaf

java.lang.Object

uk.ac.starlink.connect.ErrorLeaf

All Implemented Interfaces:

Leaf, Node

public class ErrorLeaf
extends Object
implements Leaf

Dummy Leaf implmentation which describes an error condition.

Since:

9 Sep 2005

Author:

Mark Taylor

Constructor Summary

Constructors

Constructor and Description
ErrorLeaf(Branch parent, Throwable err) Constructor.

Method Summary

Modifier and Type	Method and Description
DataSource	getDataSource() Returns a data source (replayable input stream) containing the data content of this leaf.
String	getName() Returns the name of this node.
OutputStream	getOutputStream() Returns an output stream from this leaf.
Branch	getParent() Returns the parent branch of this node.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ErrorLeaf

public ErrorLeaf(Branch parent,
                 Throwable err)

Constructor.

Parameters:

parent - leaf parent

err - the throwable which this leaf reprsents

Method Detail

getParent

public Branch getParent()

Description copied from interface: Node

Returns the parent branch of this node. If this node is at the root of its tree, it will return null.

Specified by:

getParent in interface Node

Returns:

parent

getName

public String getName()

Description copied from interface: Node

Returns the name of this node. This should not be an entire pathname, that is, it should not include the name of its parent.

Specified by:

getName in interface Node

Returns:

name

getDataSource

public DataSource getDataSource()
                         throws IOException

Description copied from interface: Leaf

Returns a data source (replayable input stream) containing the data content of this leaf.

Specified by:

getDataSource in interface Leaf

Returns:

data source

Throws:

FileNotFoundException - if the file named by this leaf does not exist

IOException - if some other error occurs

getOutputStream

public OutputStream getOutputStream()
                             throws IOException

Description copied from interface: Leaf

Returns an output stream from this leaf. Whether the file named by this leaf already exists or not, the returned stream should effectively write to a new file (deleting an existing one if necessary).

Specified by:

getOutputStream in interface Leaf

Returns:

output stream writing to the file named by this leaf

Throws:

IOException - if there's some error

toString

public String toString()

Overrides:

toString in class Object