uk.ac.starlink.ttools.example
Class AllWiseAsciiStarTable

java.lang.Object
  uk.ac.starlink.table.AbstractStarTable
      uk.ac.starlink.table.formats.StreamStarTable
          uk.ac.starlink.ttools.example.AllWiseAsciiStarTable

All Implemented Interfaces:

uk.ac.starlink.table.StarTable

public class AllWiseAsciiStarTable
extends uk.ac.starlink.table.formats.StreamStarTable

StarTable implementation which can read data from the AllWise data release. At time of writing these files are available from http://irsadist.ipac.caltech.edu/wise-allwise/. The files are formatted as pipe-separated ASCII, and optionally compressed. The metadata is stored in an external schema table file.

Since:

6 Feb 2014

Author:

Mark Taylor

Field Summary

Fields inherited from class uk.ac.starlink.table.formats.StreamStarTable

END

Constructor Summary

AllWiseAsciiStarTable(uk.ac.starlink.util.DataSource datsrc, URL schemaUrl, long nrow)
Constructor.

Method Summary

protected uk.ac.starlink.table.formats.RowEvaluator.Metadata	obtainMetadata() Obtains metadata for the table by reading the schema provided at construction time.
protected List	readRow(PushbackInputStream in)
protected uk.ac.starlink.table.formats.RowEvaluator.Metadata	readSchema(uk.ac.starlink.util.DataSource datsrc) Given a PostgreSQL/2MASS-type schema file, works out what the column metadata will look like for each column of the table.

Methods inherited from class uk.ac.starlink.table.formats.StreamStarTable

getColumnCount, getColumnInfo, getInputStream, getRowCount, getRowSequence, init

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

checkedLongToInt, getCell, getColumnAuxDataInfos, getName, getParameterByName, getParameters, getRow, getURL, isRandom, setName, setParameter, setParameters, setURL

Methods inherited from class java.lang.Object

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

Constructor Detail

AllWiseAsciiStarTable

public AllWiseAsciiStarTable(uk.ac.starlink.util.DataSource datsrc,
                             URL schemaUrl,
                             long nrow)
                      throws IOException

Constructor. You have to supply the number of rows that getRowCount will report.

Parameters:

datsrc - input data source

schemaUrl - URL for 'schema' table which describes data types

nrow - reported number of rows in table, -1 if unknown

Throws:

IOException

Method Detail

readRow

protected List readRow(PushbackInputStream in)
                throws uk.ac.starlink.table.TableFormatException,
                       IOException

Specified by:

readRow in class uk.ac.starlink.table.formats.StreamStarTable

Throws:

uk.ac.starlink.table.TableFormatException

IOException

obtainMetadata

protected uk.ac.starlink.table.formats.RowEvaluator.Metadata obtainMetadata()
                                                                     throws IOException

Obtains metadata for the table by reading the schema provided at construction time.

Specified by:

obtainMetadata in class uk.ac.starlink.table.formats.StreamStarTable

Throws:

IOException

readSchema

protected uk.ac.starlink.table.formats.RowEvaluator.Metadata readSchema(uk.ac.starlink.util.DataSource datsrc)
                                                                 throws IOException

Given a PostgreSQL/2MASS-type schema file, works out what the column metadata will look like for each column of the table.

Parameters:

datsrc - data source for schema file

Returns:

metadata object

Throws:

IOException