net.sf.farrago.namespace.mock
Class MedMockTupleIter

java.lang.Object
  org.eigenbase.runtime.AbstractTupleIter
      net.sf.farrago.namespace.mock.MedMockTupleIter

All Implemented Interfaces:

TupleIter, ClosableAllocation

public class MedMockTupleIter
extends AbstractTupleIter

MedMockTupleIter generates mock data.

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/namespace/mock/MedMockTupleIter.java#7 $

Author:

Stephan Zuercher (adapted from MedMockIterator)

Nested Class Summary

Nested classes/interfaces inherited from interface org.eigenbase.runtime.TupleIter

TupleIter.NoDataReason, TupleIter.TimeoutException

Field Summary

private long	nRows
private long	nRowsInit
private Object	obj

Fields inherited from interface org.eigenbase.runtime.TupleIter

EMPTY_ITERATOR

Constructor Summary

MedMockTupleIter(Object obj, long nRows)
Constructor.

Method Summary

void	closeAllocation() Closes this object.
Object	fetchNext() Returns the next element in the iteration.
void	restart() Restarts this iterator, so that a subsequent call to TupleIter.fetchNext() returns the first element in the collection being iterated.

Methods inherited from class org.eigenbase.runtime.AbstractTupleIter

setTimeout

Methods inherited from class java.lang.Object

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

Field Detail

obj

private Object obj

nRows

private long nRows

nRowsInit

private long nRowsInit

Constructor Detail

MedMockTupleIter

public MedMockTupleIter(Object obj,
                        long nRows)

Constructor.

Parameters:

obj - the single object which is returned over and over

nRows - number of rows to generate

Method Detail

fetchNext

public Object fetchNext()

Description copied from interface: TupleIter

Returns the next element in the iteration. If there is no next value, it returns a value from the TupleIter.NoDataReason enumeration indicating why no data was returned.

If this method returns TupleIter.NoDataReason.END_OF_DATA, no further data will be returned by this iterator unless TupleIter.restart() is called.

If this method returns TupleIter.NoDataReason.UNDERFLOW, no data is currently available, but may be come available in the future. It is possible for consecutive calls to return UNDERFLOW and then END_OF_DATA.

The object returned by this method may be re-used for each subsequent call to fetchNext(). In other words, callers must either make certain that the returned value is no longer needed or is copied before any subsequent calls to fetchNext().

Returns:

the next element in the iteration, or an instance of TupleIter.NoDataReason.

restart

public void restart()

Description copied from interface: TupleIter

Restarts this iterator, so that a subsequent call to TupleIter.fetchNext() returns the first element in the collection being iterated.

Specified by:

restart in interface TupleIter

Overrides:

restart in class AbstractTupleIter

closeAllocation

public void closeAllocation()

Description copied from interface: ClosableAllocation

Closes this object.