uk.ac.starlink.pds4

Class Pds4StarTable

java.lang.Object

uk.ac.starlink.table.AbstractStarTable

uk.ac.starlink.pds4.Pds4StarTable

All Implemented Interfaces:

Closeable, AutoCloseable, StarTable

Direct Known Subclasses:

BasePds4StarTable, DelimitedPds4StarTable

public abstract class Pds4StarTable
extends AbstractStarTable

Abstract superclass for PDS4 StarTable implementations. This handles table metadata that is not dependent on the exact storage format, but concrete subclasses have to implement data access (getRowSequence).

Since:

24 Nov 2021

Author:

Mark Taylor

Field Summary

Fields

Modifier and Type	Field and Description
static ValueInfo	DESCRIPTION_INFO

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Pds4StarTable(Table table, URI contextUri) Constructor.

Method Summary

Modifier and Type	Method and Description
long	getRowCount() Returns the number of rows in this table, if known.

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

checkedLongToInt, close, getCell, getColumnAuxDataInfos, getColumnCount, getColumnInfo, getName, getParameters, getRow, getRowAccess, getRowSequence, getRowSplittable, getURL, isRandom, setName, setParameters, setURL

Methods inherited from class java.lang.Object

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

Methods inherited from interface uk.ac.starlink.table.StarTable

getParameterByName, setParameter

Field Detail

DESCRIPTION_INFO

public static final ValueInfo DESCRIPTION_INFO

Constructor Detail

Pds4StarTable

protected Pds4StarTable(Table table,
                        URI contextUri)
                 throws IOException

Constructor.

Parameters:

table - table object on which this table is based

contextUri - parent URI for the PDS4 label

Throws:

IOException

Method Detail

getRowCount

public long getRowCount()

Description copied from interface: StarTable

Returns the number of rows in this table, if known. If the number of rows cannot be (easily) determined, a value of -1 will be returned.

Specified by:

getRowCount in interface StarTable

Specified by:

getRowCount in class AbstractStarTable

Returns:

the number of rows, or -1