public class RandomRowSequence extends java.lang.Object implements RowSequence
Constructor and Description |
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RandomRowSequence(StarTable startab)
Constructs a RowSequence from a StarTable which must offer random
access and know its number of rows.
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Modifier and Type | Method and Description |
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void |
close()
Indicates that this sequence will not be required any more.
|
java.lang.Object |
getCell(int icol)
Returns the contents of a cell in the current row.
|
java.lang.Object[] |
getRow()
Returns the contents of the current table row, as an array
with the same number of elements as there are columns in this
table.
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boolean |
next()
Attempts to advances the current row to the next one.
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public RandomRowSequence(StarTable startab)
startab
- the StarTable object providing the datajava.lang.IllegalArgumentException
- if startab.isRandom()==false
or startab.getRowCount()<0public boolean next()
RowSequence
RowSequence.getCell(int)
or RowSequence.getRow()
methods.next
in interface RowSequence
public java.lang.Object[] getRow() throws java.io.IOException
RowSequence
getRow
in interface RowSequence
java.io.IOException
- if there is an error reading the datapublic java.lang.Object getCell(int icol) throws java.io.IOException
RowSequence
getCell
in interface RowSequence
java.io.IOException
- if there is an error reading the datapublic void close()
RowSequence
close
is undefined.close
in interface RowSequence
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