Package net.sf.basedb.clients.web.servlet

Class PlotServlet.CFResultIterator

java.lang.Object

net.sf.basedb.clients.web.servlet.PlotServlet.CFResultIterator

All Implemented Interfaces:

AutoCloseable, Iterator<SqlResult>, QueryResult, ResultIterator<SqlResult>, SqlResultIterator

Enclosing class:

PlotServlet

private static class PlotServlet.CFResultIterator
extends Object
implements SqlResultIterator

Special implementation of a SqlResultIterator that combines the result from the parent and child into one virtual iterator. The parent iterator must select the following columns in this order: postion, parent M, parent A. The child iterator must selected the following columns in this order: position, child M.

The we map our own columns like this: a --> parent A, m --> parent M, cf --> parent M - child M

Field Summary

Fields

Modifier and Type	Field	Description
private SqlResultIterator	child
private PlotServlet.CFSqlResult	next
private SqlResultIterator	parent

Constructor Summary

Constructors

Constructor	Description
CFResultIterator(SqlResultIterator parent, SqlResultIterator child)

Method Summary

Modifier and Type	Method	Description
void	close()	Close the iterator and immediately release all resources associated with it.
int	getIndex(String name)	Get the index number of a selected column.
long	getTotalCount()	Get the total number of items returned by the query, ignoring any limits set by Query.setFirstResult(int) and Query.setMaxResults(int).
boolean	hasNext()
boolean	isClosed()	Check if the iterator has been closed.
SqlResult	next()
void	remove()	Not supported.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Iterator

forEachRemaining

Field Details

parent

private final SqlResultIterator parent

child

private final SqlResultIterator child

next

private final PlotServlet.CFSqlResult next

Constructor Details

CFResultIterator

CFResultIterator(SqlResultIterator parent,
SqlResultIterator child)

Method Details

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<SqlResult>

next

public SqlResult next()

Specified by:

next in interface Iterator<SqlResult>

remove

public void remove()

Not supported.

Specified by:

remove in interface Iterator<SqlResult>

Throws:

UnsupportedOperationException - Always

getTotalCount

public long getTotalCount()

Description copied from interface: QueryResult

Get the total number of items returned by the query, ignoring any limits set by Query.setFirstResult(int) and Query.setMaxResults(int). If the Query.setReturnTotalCount(boolean) hasn't been enabled this method may not return a correct value.

Specified by:

getTotalCount in interface QueryResult

Returns:

The total number of items, or -1 if not known

See Also:

Query.setReturnTotalCount(boolean)

close

public void close()

Description copied from interface: ResultIterator

Close the iterator and immediately release all resources associated with it.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface ResultIterator<SqlResult>

isClosed

public boolean isClosed()

Description copied from interface: ResultIterator

Check if the iterator has been closed.

Specified by:

isClosed in interface ResultIterator<SqlResult>

getIndex

public int getIndex(String name)
             throws SQLException

Description copied from interface: SqlResultIterator

Get the index number of a selected column. Use this method to find the index of a column and then use the SqlResult.getXxx(index) methods to get the value of that column.

Specified by:

getIndex in interface SqlResultIterator

Parameters:

name - The name of a selected column

Returns:

The index number

Throws:

SQLException - If there is an error