public class WrapperRowSequence extends Object implements RowSequence
This class is provided so that it can be extended by subclasses which modify the view of the base sequence in useful ways.
WrapperStarTable
Modifier and Type | Field and Description |
---|---|
protected RowSequence |
baseSeq |
Constructor and Description |
---|
WrapperRowSequence(RowSequence baseSeq)
Constructs a new RowSequence based on a given one.
|
WrapperRowSequence(RowSequence baseSeq,
RowData data)
Constructs a new RowSequence based on a given one but with
a supplied data access implementation.
|
Modifier and Type | Method and Description |
---|---|
void |
close()
Indicates that this sequence will not be required any more.
|
Object |
getCell(int icol)
Returns the contents of a cell in the current row.
|
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 advance the current row to the next one.
|
String |
toString()
Returns an indication of the wrapper structure of this sequence.
|
protected final RowSequence baseSeq
public WrapperRowSequence(RowSequence baseSeq)
baseSeq
- the base row sequencepublic WrapperRowSequence(RowSequence baseSeq, RowData data)
baseSeq
- the base row accessdata
- RowData object whose methods will be used
to implement the getCell and getRow methodspublic boolean next() throws IOException
RowSequence
true
is returned the attempt has been successful,
and if false
is returned there are no more rows in this
sequence.
Since the initial position of a RowSequence is before the first row,
this method must be called before current row data
can be accessed using the
RowSequence.getCell(int)
or RowSequence.getRow()
methods.next
in interface RowSequence
next
in interface Sequence
true
iff this sequence has been advanced to the
next rowIOException
- if there is some errorpublic Object getCell(int icol) throws IOException
RowSequence
getColumnInfo(icol).getContentClass()
.
An unchecked exception will be thrown if there is no current
row (next
has not yet been called).getCell
in interface RowData
getCell
in interface RowSequence
icol
- column indexicol
in the current rowIOException
- if there is an error reading the datapublic Object[] getRow() throws IOException
RowSequence
next
has not yet been called).getRow
in interface RowData
getRow
in interface RowSequence
irow
IOException
- if there is an error reading the datapublic void close() throws IOException
RowSequence
close
is undefined.close
in interface Closeable
close
in interface AutoCloseable
close
in interface RowSequence
IOException
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