Constructor Detail

• DalConeSearcher

  public DalConeSearcher​(java.lang.String stdName,
                         java.lang.String stdVers,
                         boolean believeEmpty)

  Constructor.

  Parameters:

  stdName - name of the DAL standard (used in user messages)

  stdVers - version of the DAL standard (used in user messages)

  believeEmpty - whether empty tables are considered to contain correct metadata

Method Detail

• getConsistentTable

  protected uk.ac.starlink.table.StarTable getConsistentTable​(uk.ac.starlink.table.StarTable table)
                                                       throws java.io.IOException

  Takes a table which is the result of a query to the service handled by this searcher, and returns a table which has compatible column structure to any tables returned by previous calls to this method. If the given table looks inconsistent (different number or type of columns), an exception may be thrown or null returned instead.

  Parameters:

  table - candidate table

  Returns:

  same table if it's consistent, or possibly null

  Throws:

  java.io.IOException

• getUcd1RaIndex

  public int getUcd1RaIndex​(uk.ac.starlink.table.StarTable table)

  Returns the column index for a column in a given table identified with the UCD POS_EQ_RA_MAIN. If it can't be done, some attempt is made to warn and guess an alternative.

  Parameters:

  table - table

  Returns:

  index of RA column, or -1 if it can't be found

• getUcd1DecIndex

  public int getUcd1DecIndex​(uk.ac.starlink.table.StarTable table)

  Returns the column index for a column in a given table identified with the UCD POS_EQ_DEC_MAIN. If it can't be done, some attempt is made to warn and guess an alternative.

  Parameters:

  table - table

  Returns:

  index of Dec column, or -1 if it can't be found

• getInconsistentEmptyAdvice

  protected java.lang.String getInconsistentEmptyAdvice​()

  Returns implementation-specific advice to the user about how to swich off trusting the metadata of zero-row tables. This is issued to the user in the event that zero-row tables are trusted (believeEmpty==true), but subsequent results make it look like they shouldn't be.

  Returns:

  warning message