StarTable
public class RowPermutedStarTable extends WrapperStarTable
A long[]
array, rowMap
, is used to keep
track of which rows in this table correspond to which rows in the
base table; the n'th row in this table corresponds to the
rowMap[n]'th row in the base table.
The rowMap array may contain duplicate entries, but should
not contain any entries larger than the number of rows in the base table.
Any negative entry is treated as a special case resulting in a 'blank'
row of all null values.
It can be modified during the life of the table, but it's not a good
idea to do this while a RowSequence is active.
baseTable
Constructor | Description |
---|---|
RowPermutedStarTable(StarTable baseTable) |
Constructs a new RowPermutedTable with rows initially in unpermuted
order.
|
RowPermutedStarTable(StarTable baseTable,
long[] rowMap) |
Constructs a new RowPermutedStarTable from a base table
and a rowMap array.
|
Modifier and Type | Method | Description |
---|---|---|
java.lang.Object |
getCell(long irow,
int icol) |
Returns the contents of a given table cell.
|
java.lang.Object[] |
getRow(long irow) |
Returns the contents of a given table row.
|
long |
getRowCount() |
Returns the number of rows in this table, if known.
|
long[] |
getRowMap() |
Returns the mapping array.
|
RowSequence |
getRowSequence() |
Returns an object which can iterate over all the rows in the table
sequentially.
|
boolean |
isRandom() |
Returns true.
|
void |
setRowMap(long[] rowMap) |
Sets the mapping array.
|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
checkedLongToInt, getBaseTable, getColumnAuxDataInfos, getColumnCount, getColumnInfo, getName, getParameterByName, getParameters, getURL, setName, setParameter, setURL, toString
public RowPermutedStarTable(StarTable baseTable, long[] rowMap)
baseTable must provide random access.
baseTable
- base tablerowMap
- array mapping rows in the new permuted table to
rows in baseTablejava.lang.IllegalArgumentException
- if baseTable.isRandom returns
falsepublic RowPermutedStarTable(StarTable baseTable)
baseTable
- base tablepublic long[] getRowMap()
public void setRowMap(long[] rowMap)
rowMap
- array mapping rows in this table to rows in the base tablepublic long getRowCount()
StarTable
getRowCount
in interface StarTable
getRowCount
in class WrapperStarTable
public boolean isRandom()
isRandom
in interface StarTable
isRandom
in class WrapperStarTable
public RowSequence getRowSequence()
StarTable
getRowSequence
in interface StarTable
getRowSequence
in class WrapperStarTable
public java.lang.Object getCell(long irow, int icol) throws java.io.IOException
StarTable
getCell
in interface StarTable
getCell
in class WrapperStarTable
irow
- the index of the cell's rowicol
- the index of the cell's columnjava.io.IOException
- if there is an error reading the datapublic java.lang.Object[] getRow(long irow) throws java.io.IOException
StarTable
getRow
in interface StarTable
getRow
in class WrapperStarTable
irow
- the index of the row to retrievejava.io.IOException
- if there is an error reading the dataCopyright © 2018 Central Laboratory of the Research Councils. All Rights Reserved.