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java.lang.Objectuk.ac.starlink.table.RandomRowSequence
public class RandomRowSequence
An implementation of RowSequence which obtains its data from a random-access StarTable object.
Constructor Summary | |
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RandomRowSequence(StarTable startab)
Constructs a RowSequence from a StarTable which must offer random access and know its number of rows. |
Method Summary | |
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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. |
boolean |
next()
Attempts to advances the current row to the next one. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public RandomRowSequence(StarTable startab)
startab
- the StarTable object providing the data
java.lang.IllegalArgumentException
- if startab.isRandom()==false
or startab.getRowCount()<0Method Detail |
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public 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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