uk.ac.starlink.table
Class MetaCopyStarTable

java.lang.Object
  uk.ac.starlink.table.WrapperStarTable
      uk.ac.starlink.table.MetaCopyStarTable

All Implemented Interfaces:

StarTable

public class MetaCopyStarTable
extends WrapperStarTable

Wrapper table which makes deep copies of the table metadata, including column metadata and table parameters. Changes can safely be made to the metadata of this table without affecting the base table. Note that the metadata will not track changes in the column count of the base table.

Since:

23 Jul 2010

Field Summary

Fields inherited from class uk.ac.starlink.table.WrapperStarTable

baseTable

Constructor Summary

MetaCopyStarTable(StarTable base)
Constructor.

Method Summary

ColumnInfo	getColumnInfo(int icol) Returns the object describing the data in a given column.
java.lang.String	getName() Returns the name of this table, if it has one.
DescribedValue	getParameterByName(java.lang.String name) Returns a parameter (table-wide metadata item) of this table located by its name.
java.util.List	getParameters() Returns a list of table parameters, that is items which pertain to the entire table.
java.net.URL	getURL() Initially returns null to indicate that this table itself is not persistent.
void	setColumnInfo(int icol, ColumnInfo colInfo)
void	setName(java.lang.String name) Sets the name of this table.
void	setParameter(DescribedValue dval) Adds the given DescribedValue to the list of parameter metadata objects associated with this table.
void	setParameters(java.util.List paramList)
void	setURL(java.net.URL url) Sets the URL of this table.

Methods inherited from class uk.ac.starlink.table.WrapperStarTable

checkedLongToInt, getBaseTable, getCell, getColumnAuxDataInfos, getColumnCount, getRow, getRowCount, getRowSequence, isRandom, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

MetaCopyStarTable

public MetaCopyStarTable(StarTable base)

Constructor.

Parameters:

base - base table

Method Detail

getName

public java.lang.String getName()

Description copied from interface: StarTable

Returns the name of this table, if it has one. The meaning of the name is not defined, but it will typically be a short string of text indicating the identity of this table.

Specified by:

getName in interface StarTable

Overrides:

getName in class WrapperStarTable

Returns:

a name for this table, or null if no suitable one exists

setName

public void setName(java.lang.String name)

Description copied from interface: StarTable

Sets the name of this table. If called, the supplied name should provide the return value for subsequent calls of StarTable.getName().

Specified by:

setName in interface StarTable

Overrides:

setName in class WrapperStarTable

Parameters:

name - table name

getURL

public java.net.URL getURL()

Description copied from class: WrapperStarTable

Initially returns null to indicate that this table itself is not persistent.

Specified by:

getURL in interface StarTable

Overrides:

getURL in class WrapperStarTable

Returns:

the URL of this table, or null if none is known

setURL

public void setURL(java.net.URL url)

Description copied from interface: StarTable

Sets the URL of this table. It ought to be possible in principle to reconstruct this table by reading the resource at url. If called, the supplied url should provide the return value for subsequent calls of StarTable.getURL().

Specified by:

setURL in interface StarTable

Overrides:

setURL in class WrapperStarTable

Parameters:

url - table URL

getParameters

public java.util.List getParameters()

Description copied from interface: StarTable

Returns a list of table parameters, that is items which pertain to the entire table. Each element of this list must be a DescribedValue object.

Specified by:

getParameters in interface StarTable

Overrides:

getParameters in class WrapperStarTable

Returns:

a List of DescribedValue objects constituting table-wide metadata not covered elsewhere in this interface

setParameters

public void setParameters(java.util.List paramList)

getParameterByName

public DescribedValue getParameterByName(java.lang.String name)

Description copied from interface: StarTable

Returns a parameter (table-wide metadata item) of this table located by its name. If more than one parameter with the given name exists, an arbitrary one will be returned. If no parameter with the given name exists, null will be returned.

Specified by:

getParameterByName in interface StarTable

Overrides:

getParameterByName in class WrapperStarTable

Parameters:

name - the name of the table parameter required

setParameter

public void setParameter(DescribedValue dval)

Description copied from interface: StarTable

Adds the given DescribedValue to the list of parameter metadata objects associated with this table. If an item in the parameter list with the same name as the supplied value already exists, it is removed from the list.

Specified by:

setParameter in interface StarTable

Overrides:

setParameter in class WrapperStarTable

Parameters:

dval - the new parameter datum to add

getColumnInfo

public ColumnInfo getColumnInfo(int icol)

Description copied from interface: StarTable

Returns the object describing the data in a given column.

Specified by:

getColumnInfo in interface StarTable

Overrides:

getColumnInfo in class WrapperStarTable

Parameters:

icol - the column for which header information is required

Returns:

a ValueInfo object for column icol

setColumnInfo

public void setColumnInfo(int icol,
                          ColumnInfo colInfo)