Package uk.ac.starlink.topcat

Class TopcatCodec1

java.lang.Object
uk.ac.starlink.topcat.TopcatCodec1
All Implemented Interfaces:
TopcatCodec
public class TopcatCodec1 extends Object implements TopcatCodec
Original TopcatCodec implementation. This works but serializes all row subsets as bit masks and all columns as literal values. Thus a session round-tripped using this codec gives you back all the table and subset values that you had in the first place, but the expressions are lost, and additional file space is used to serialize these synthetic columns and subsets.

An additional issue is that there is a limit of 64 subsets.

Since:
16 Jul 2010
Author:
Mark Taylor

  • Constructor Summary

    Constructors
    Constructor
    Description
    TopcatCodec1()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    TopcatModel
    decode(uk.ac.starlink.table.StarTable table, String location, ControlWindow controlWindow)
    Takes a table which has been previously serialized by calling this codec's encode method, and for which the isEncoded method returns true, and turns it into a TopcatModel.
    uk.ac.starlink.table.StarTable
    encode(TopcatModel tcModel)
    Turns a TopcatModel into a StarTable, ready for serialization.
    boolean
    isCodecUtype(String utype)
    Indicates whether a given utype is a marker for metadata private to the serialization scheme used by this class.
    boolean
    isEncoded(uk.ac.starlink.table.StarTable table)
    Indicates whether a given table is a candidate for this codec's decode method.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • TopcatCodec1

      public TopcatCodec1()

  • Method Details

    • encode

      public uk.ac.starlink.table.StarTable encode(TopcatModel tcModel)
      Description copied from interface: TopcatCodec
      Turns a TopcatModel into a StarTable, ready for serialization.
      Specified by:
      encode in interface TopcatCodec
      Parameters:
      tcModel - model
      Returns:
      table

    • isEncoded

      public boolean isEncoded(uk.ac.starlink.table.StarTable table)
      Description copied from interface: TopcatCodec
      Indicates whether a given table is a candidate for this codec's decode method. It should in general return true for a table that has been returned from this object's encode method (possibly following a table write/read cycle) and false for other tables.
      Specified by:
      isEncoded in interface TopcatCodec
      Parameters:
      table - data+metadata table
      Returns:
      true iff it looks like the table was written by this codec and can be decoded by it

    • decode

      public TopcatModel decode(uk.ac.starlink.table.StarTable table, String location, ControlWindow controlWindow)
      Description copied from interface: TopcatCodec
      Takes a table which has been previously serialized by calling this codec's encode method, and for which the isEncoded method returns true, and turns it into a TopcatModel. If decoding fails, null is returned.

      If used with a ControlWindow that users may be interacting with, this method should be called from the AWT event dispatch thread. This method may (for instance during testing) be called with a null value for the controlWindow parameter, but the resulting TopcatModel may not be suitable for all kinds of user interactions.

      Specified by:
      decode in interface TopcatCodec
      Parameters:
      table - encoded table
      location - table location string
      controlWindow - control window, or null if necessary
      Returns:
      topcat model, or null

    • isCodecUtype

      public boolean isCodecUtype(String utype)
      Indicates whether a given utype is a marker for metadata private to the serialization scheme used by this class.
      Parameters:
      utype - info utype
      Returns:
      true iff utype is for private codec purposes