Package uk.ac.starlink.table.join
Class Match1Type
- java.lang.Object
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- uk.ac.starlink.table.join.Match1Type
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public abstract class Match1Type extends java.lang.Object
Defines how an output table is created from the results of an internal (single-table) match operation. This class contains several factory methods for generating sensible output tables from an internal match. Others are possible.- Since:
- 15 Nov 2007
- Author:
- Mark Taylor
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Constructor Summary
Constructors Constructor Description Match1Type()
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Method Summary
All Methods Static Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description static Match1Type
createEliminateMatchesType(int retainCount)
Factory method returning a type object which eliminates rows forming part of the same match group.static Match1Type
createIdentifyType()
Factory method returning a type object which identifies matched rows by adding some additional columns to the input.abstract StarTable
createMatchTable(StarTable inTable, LinkSet rowLinks)
Generates an output table given an input table and the LinkSet object which defines how its rows are related to each other by matching.static Match1Type
createWideType(int grpSize)
Factory method returning a type object which aligns match groups with each other in the rows of a new wide table.
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Method Detail
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createMatchTable
public abstract StarTable createMatchTable(StarTable inTable, LinkSet rowLinks)
Generates an output table given an input table and the LinkSet object which defines how its rows are related to each other by matching.- Parameters:
inTable
- input tablerowLinks
- link set object giving the result of a single-table match
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createIdentifyType
public static Match1Type createIdentifyType()
Factory method returning a type object which identifies matched rows by adding some additional columns to the input. These flag which rows match which other ones and give a group size count.- Returns:
- new identification type
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createEliminateMatchesType
public static Match1Type createEliminateMatchesType(int retainCount)
Factory method returning a type object which eliminates rows forming part of the same match group. All rows from a match group starting at indexretainCount
are removed from the output table. ThusretainCount=0
removes any rows which participate in matches with other ones, andretainCount=1
leaves just one from any such group.- Parameters:
retainCount
- number of items to retain from each match group
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createWideType
public static Match1Type createWideType(int grpSize)
Factory method returning a type object which aligns match groups with each other in the rows of a new wide table. The output table has columns likegrpSize
versions of the input table side by side, and where there are exactlygrpSize
matches in a group they form a row. Rows which are not part of agrpSize
-element match do not appear in the output.- Parameters:
grpSize
- size of group we are interested in
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