uk.ac.starlink.srb

Class SRBBranch

java.lang.Object

uk.ac.starlink.srb.SRBNode

uk.ac.starlink.srb.SRBBranch

All Implemented Interfaces:

Branch, Node

public class SRBBranch
extends SRBNode
implements Branch

Branch implemenatation based on an SRB file object.

Since:

7 Mar 2005

Author:

Mark Taylor (Starlink)

Constructor Summary

Constructors

Constructor and Description
SRBBranch(edu.sdsc.grid.io.srb.SRBFile dir, edu.sdsc.grid.io.srb.SRBFile root) Constructor.

Method Summary

Modifier and Type	Method and Description
Node	createNode(String location) Attempts to construct a new node in the context of this one.
Node[]	getChildren() Returns the array of child nodes belonging to this branch.

Methods inherited from class uk.ac.starlink.srb.SRBNode

equals, getFile, getName, getParent, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface uk.ac.starlink.connect.Node

getName, getParent

Constructor Detail

SRBBranch

public SRBBranch(edu.sdsc.grid.io.srb.SRBFile dir,
                 edu.sdsc.grid.io.srb.SRBFile root)

Constructor. The SRB file object must be a directory. No check is made here though, since SRBFile.isDirectory seems like an incredibly slow call to make.

Parameters:

dir - SRB file object on which this branch is based - must be of type directory

root - the root of the filesystem in which dir lives.

Method Detail

getChildren

public Node[] getChildren()

Description copied from interface: Branch

Returns the array of child nodes belonging to this branch. All the returned values represent file objects which actuallly exist in the filesystem.

Specified by:

getChildren in interface Branch

Returns:

child nodes of this one

createNode

public Node createNode(String location)

Description copied from interface: Branch

Attempts to construct a new node in the context of this one. The new item may represent a new or an existing node in the filesystem. This call should not in itself perform any write operations on the filesystem (such as creating a node which doesn't currently exist), though a subsequent Leaf.getOutputStream() call may do so.

The returned node will typically be a child of this branch, but need not be, for instance if name is interpreted as an absolute path.

If the named node cannot be created, null may be returned.

Specified by:

createNode in interface Branch

Parameters:

location - name of a node in the context of this branch

Returns:

node representing the location of an existing or new node