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java.lang.Objectuk.ac.starlink.table.AbstractStarTable
uk.ac.starlink.table.jdbc.SequentialResultSetStarTable
public class SequentialResultSetStarTable
StarTable implementation based on a ResultSet
.
It can read through the data once, and no more.
Beware: it therefore breaks the general contract of
StarTable
, in that calls of
getRowSequence()
after the first one will throw a
UnrepeatableSequenceException
.
Only use this class if you know that the table needs to be read once only.
Constructor Summary | |
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SequentialResultSetStarTable(java.sql.ResultSet rset)
Constructor. |
|
SequentialResultSetStarTable(StarResultSet srset)
Constructs from a StarResultSet. |
Method Summary | |
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java.util.List |
getColumnAuxDataInfos()
Goes through the table columns (ColumnInfo objects) and picks out all the AuxData items which exist, generalising where necessary and returning a union of them in alphabetical order by name. |
int |
getColumnCount()
Returns the number of columns in this table. |
ColumnInfo |
getColumnInfo(int icol)
Returns the object describing the data in a given column. |
java.sql.ResultSet |
getResultSet()
Returns the result set on which this table is built. |
long |
getRowCount()
Returns the number of rows in this table, if known. |
RowSequence |
getRowSequence()
The first time it is called, returns an iterator over the rows of the result set. |
Methods inherited from class uk.ac.starlink.table.AbstractStarTable |
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checkedLongToInt, getCell, getName, getParameterByName, getParameters, getRow, getURL, isRandom, setName, setParameter, setParameters, setURL |
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 SequentialResultSetStarTable(java.sql.ResultSet rset) throws java.sql.SQLException
rset
- result set containing data - should be positioned at start
java.sql.SQLException
public SequentialResultSetStarTable(StarResultSet srset)
srset
- result set containing data - should be positioned at startMethod Detail |
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public java.sql.ResultSet getResultSet()
public int getColumnCount()
StarTable
getColumnCount
in interface StarTable
getColumnCount
in class AbstractStarTable
public ColumnInfo getColumnInfo(int icol)
StarTable
getColumnInfo
in interface StarTable
getColumnInfo
in class AbstractStarTable
icol
- the column for which header information is required
public long getRowCount()
StarTable
getRowCount
in interface StarTable
getRowCount
in class AbstractStarTable
public java.util.List getColumnAuxDataInfos()
AbstractStarTable
getColumnAuxDataInfos
in interface StarTable
getColumnAuxDataInfos
in class AbstractStarTable
ColumnInfo.getAuxData()
public RowSequence getRowSequence() throws UnrepeatableSequenceException, java.io.IOException
UnrepeatableSequenceException
.
getRowSequence
in interface StarTable
getRowSequence
in class AbstractStarTable
UnrepeatableSequenceException
- if called more than once
java.io.IOException
- if there is an error providing access
|
Copyright © 2004 CLRC: Central Laboratory of the Research Councils. All rights reserved. | ||||||||
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