Package ucar.ma2

Class StructureDataIteratorLimited

java.lang.Object

ucar.ma2.StructureDataIteratorLimited

All Implemented Interfaces:

Closeable, AutoCloseable, StructureDataIterator

public class StructureDataIteratorLimited
extends Object
implements StructureDataIterator

Read a maximum number of StructureData objects from a StructureDataIterator.

Since:

Apr 23, 2008

Constructor Summary

Constructors

Constructor	Description
StructureDataIteratorLimited(StructureDataIterator org, int limit)

Method Summary

Modifier and Type	Method	Description
void	close()	Make sure that the iterator is complete, and recover resources.
int	getCurrentRecno()
boolean	hasNext()	See if theres more StructureData in the iteration.
StructureData	next()	Get the next StructureData in the iteration.
StructureDataIterator	reset()	Start the iteration over again.
void	setBufferSize(int bytes)	Hint to use this much memory in buffering the iteration.

Methods inherited from class java.lang.Object

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

Methods inherited from interface ucar.ma2.StructureDataIterator

finish

Constructor Details

StructureDataIteratorLimited

public StructureDataIteratorLimited(StructureDataIterator org,
 int limit)

Method Details

next

public StructureData next()
                   throws IOException

Description copied from interface: StructureDataIterator

Get the next StructureData in the iteration.

Specified by:

next in interface StructureDataIterator

Returns:

next StructureData record.

Throws:

IOException - on read error

hasNext

public boolean hasNext()
                throws IOException

Description copied from interface: StructureDataIterator

See if theres more StructureData in the iteration. You must always call this before calling next().

Specified by:

hasNext in interface StructureDataIterator

Returns:

true if more records are available

Throws:

IOException - on read error

reset

public StructureDataIterator reset()

Description copied from interface: StructureDataIterator

Start the iteration over again.

Specified by:

reset in interface StructureDataIterator

Returns:

a new or reset iterator.

setBufferSize

public void setBufferSize(int bytes)

Description copied from interface: StructureDataIterator

Hint to use this much memory in buffering the iteration. No guarentee that it will be used by the implementation.

Specified by:

setBufferSize in interface StructureDataIterator

Parameters:

bytes - amount of memory in bytes

getCurrentRecno

public int getCurrentRecno()

Specified by:

getCurrentRecno in interface StructureDataIterator

close

public void close()

Description copied from interface: StructureDataIterator

Make sure that the iterator is complete, and recover resources. Best to put in a try/finally block like:

 try (StructureDataIterator iter = obj.getStructureDataIterator()) {
   while (iter.hasNext())
     process(iter.next());
 }
 

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface StructureDataIterator