uk.ac.starlink.datanode.nodes
Class TableHDUDataNode

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

public class TableHDUDataNode
extends HDUDataNode

An implementation of the DataNode interface for representing binary or ASCII tables in FITS HDUs.

Version:
$Id$
Author:
Mark Taylor (Starlink)

Constructor Summary
TableHDUDataNode(Header header, FITSDataNode.ArrayDataMaker hdudata)
          Initialises a TableHDUDataNode from an Header object.
 
Method Summary
 boolean allowsChildren()
          The DefaultDataNode implementation of this method returns false.
 Object getDataObject(DataType dtype)
          The DefaultDataNode implementation returns any data object which has been registered using DefaultDataNode.registerDataObject(uk.ac.starlink.datanode.nodes.DataType, java.lang.Object).
 String getDescription()
          Gets a concise description of this object.
 String getNodeTLA()
          The DefaultDataNode implementation returns the string "...".
 String getNodeType()
          Returns a short sentence indicating what kind of node this is.
 StarTable getStarTable()
          Returns the StarTable containing the data.
 boolean hasDataObject(DataType dtype)
          The DefaultDataNode implementation returns true for only those data objects which have been registered using DefaultDataNode.registerDataObject(uk.ac.starlink.datanode.nodes.DataType, java.lang.Object).
 boolean isStarTable()
           
 
Methods inherited from class uk.ac.starlink.datanode.nodes.HDUDataNode
configureDetail, getHDUIndex, getHduType, getHeader, getPathElement, getPathSeparator
 
Methods inherited from class uk.ac.starlink.datanode.nodes.DefaultDataNode
beep, getChildIterator, getChildMaker, getCreator, getIcon, getLabel, getName, getParentObject, 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

TableHDUDataNode

public TableHDUDataNode(Header header,
                        FITSDataNode.ArrayDataMaker hdudata)
                 throws NoSuchDataException
Initialises a TableHDUDataNode from an Header object. The stream is read to the end of the HDU.

Parameters:
header - a FITS header object from which the node is to be created
hdudata - object which can supply the data stream where the data resides
Throws:
NoSuchDataException
Method Detail

getStarTable

public StarTable getStarTable()
                       throws IOException
Returns the StarTable containing the data. Its construction, which involves reading from the stream, is deferred until necessary.

Returns:
the StarTable object containing the data for this HDU
Throws:
IOException

isStarTable

public boolean isStarTable()

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 HDUDataNode
Returns:
true if the node is of a type which can have child nodes, false otherwise

getDescription

public String getDescription()
Description copied from interface: DataNode
Gets a concise description of this object. The form of the description will depend on the type of node, but it might detail the shape or type of data represented, or otherwise give some information additional to the name. It should not include the return value of the getName method, since they may be presented together. It should be on one line, and preferably no longer than around 70 characters. The null value may be returned if there is nothing to say.

Specified by:
getDescription in interface DataNode
Overrides:
getDescription in class HDUDataNode
Returns:
a short string describing this object

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 HDUDataNode
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 HDUDataNode
Returns:
a short description of the type of this DataNode

hasDataObject

public boolean hasDataObject(DataType dtype)
Description copied from class: DefaultDataNode
The DefaultDataNode implementation returns true for only those data objects which have been registered using DefaultDataNode.registerDataObject(uk.ac.starlink.datanode.nodes.DataType, java.lang.Object).

Specified by:
hasDataObject in interface DataNode
Overrides:
hasDataObject in class DefaultDataNode
Parameters:
dtype - data object type of interest
Returns:
true iff a subsequent call of getDataObject(type) is likely to be successful

getDataObject

public Object getDataObject(DataType dtype)
                     throws DataObjectException
Description copied from class: DefaultDataNode
The DefaultDataNode implementation returns any data object which has been registered using DefaultDataNode.registerDataObject(uk.ac.starlink.datanode.nodes.DataType, java.lang.Object).

Specified by:
getDataObject in interface DataNode
Overrides:
getDataObject in class DefaultDataNode
Parameters:
dtype - data object type of interest
Returns:
data object of type type
Throws:
DataObjectException


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