uk.ac.starlink.datanode.nodes
Class FtpDirectoryDataNode

java.lang.Object
  extended by uk.ac.starlink.datanode.nodes.DefaultDataNode
      extended by uk.ac.starlink.datanode.nodes.FtpDirectoryDataNode
All Implemented Interfaces:
DataNode

public class FtpDirectoryDataNode
extends DefaultDataNode

A DataNode which represents a directory on an FTP server. In some circumstances this can end up making rather a lot of FTP connections.

Author:
Mark Taylor (Starlink)

Constructor Summary
FtpDirectoryDataNode(FtpLocation floc)
           
FtpDirectoryDataNode(String location)
           
 
Method Summary
 boolean allowsChildren()
          The DefaultDataNode implementation of this method returns false.
 Iterator getChildIterator()
          The DefaultDataNode implementation of this method throws UnsupportedOperationException (DefaultDataNode.allowsChildren() is false).
 String getNodeTLA()
          The DefaultDataNode implementation returns the string "...".
 String getNodeType()
          Returns a short sentence indicating what kind of node this is.
 Object getParentObject()
          Returns an object which is in some sense the parent of the one this node is based on.
 String getPathSeparator()
          Returns a default separator string.
 
Methods inherited from class uk.ac.starlink.datanode.nodes.DefaultDataNode
beep, configureDetail, getChildMaker, getCreator, getDataObject, getDescription, getIcon, getLabel, getName, getPathElement, hasDataObject, makeChild, makeErrorChild, registerDataObject, setChildMaker, setCreator, setDescription, setIconID, setLabel, setName, setParentObject, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

FtpDirectoryDataNode

public FtpDirectoryDataNode(FtpLocation floc)

FtpDirectoryDataNode

public FtpDirectoryDataNode(String location)
                     throws NoSuchDataException
Throws:
NoSuchDataException
Method Detail

getNodeTLA

public String getNodeTLA()
Description copied from class: DefaultDataNode
The DefaultDataNode implementation returns the string "...".

Specified by:
getNodeTLA in interface DataNode
Overrides:
getNodeTLA in class DefaultDataNode
Returns:
"..."

getNodeType

public String getNodeType()
Description copied from interface: DataNode
Returns a short sentence indicating what kind of node this is. The return value should be just a few words. As a rough guideline it should indicate what the implementing class is.

Specified by:
getNodeType in interface DataNode
Overrides:
getNodeType in class DefaultDataNode
Returns:
a short description of the type of this DataNode

getPathSeparator

public String getPathSeparator()
Description copied from class: DefaultDataNode
Returns a default separator string.

Specified by:
getPathSeparator in interface DataNode
Overrides:
getPathSeparator in class DefaultDataNode
Returns:
"."

allowsChildren

public boolean allowsChildren()
Description copied from class: DefaultDataNode
The DefaultDataNode implementation of this method returns false.

Specified by:
allowsChildren in interface DataNode
Overrides:
allowsChildren in class DefaultDataNode
Returns:
true if the node is of a type which can have child nodes, false otherwise

getChildIterator

public Iterator getChildIterator()
Description copied from class: DefaultDataNode
The DefaultDataNode implementation of this method throws UnsupportedOperationException (DefaultDataNode.allowsChildren() is false).

Specified by:
getChildIterator in interface DataNode
Overrides:
getChildIterator in class DefaultDataNode
Returns:
an Iterator over the children. Each object iterated over should be a DataNode. Behaviour is undefined if this method is called on an object for which allowsChildren returns false.

getParentObject

public Object getParentObject()
Description copied from interface: DataNode
Returns an object which is in some sense the parent of the one this node is based on. The parent is not a DataNode, it is something which may get fed to a DataNodeFactory to create DataNode. If no such object exists, which may well be the case, null should be returned.

Specified by:
getParentObject in interface DataNode
Overrides:
getParentObject in class DefaultDataNode
Returns:
an object which is the parent of this one, or null


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