org.kuali.ole.gl.batch.service.impl

Class OriginEntryFileIterator

java.lang.Object

org.kuali.ole.gl.batch.service.impl.OriginEntryFileIterator

All Implemented Interfaces:

Iterator<OriginEntryFull>

Direct Known Subclasses:

FilteringOriginEntryFileIterator

public class OriginEntryFileIterator
extends Object
implements Iterator<OriginEntryFull>

This class lazy loads the origin entries in a flat file. This implementation uses a limited amount of memory because it does not pre-load all of the origin entries at once. (Assuming that the Java garbage collector is working well). However, if the code that uses this iterator stores the contents of this iterator in a big list somewhere, then a lot of memory may be consumed, depending on the size of the file.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	autoCloseReader
protected int	lineNumber
protected OriginEntryFull	nextEntry
protected BufferedReader	reader

Constructor Summary

Constructors

Constructor and Description
OriginEntryFileIterator(BufferedReader reader) Constructs a OriginEntryFileIterator
OriginEntryFileIterator(BufferedReader reader, boolean autoCloseReader) Constructs a OriginEntryFileIterator
OriginEntryFileIterator(File file) Constructs a OriginEntryFileIterator When constructed with this method, the file handle will be automatically closed when the end of origin entries has been reached (i.e.

Method Summary

Methods

Modifier and Type	Method and Description
protected void	fetchNextEntry() This method returns the next line in origin entry file
protected void	finalize()
boolean	hasNext()
OriginEntryFull	next()
void	remove()

Methods inherited from class java.lang.Object

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

Field Detail

nextEntry

protected OriginEntryFull nextEntry

reader

protected BufferedReader reader

lineNumber

protected int lineNumber

autoCloseReader

protected boolean autoCloseReader

Constructor Detail

OriginEntryFileIterator

public OriginEntryFileIterator(BufferedReader reader)

Constructs a OriginEntryFileIterator

Parameters:

reader - a reader representing flat-file origin entries

autoCloseReader - whether to automatically close the reader when the end of origin entries has been reached (i.e. when hasNext() returns false)

OriginEntryFileIterator

public OriginEntryFileIterator(BufferedReader reader,
                       boolean autoCloseReader)

Constructs a OriginEntryFileIterator

Parameters:

reader - a reader representing flat-file origin entries

autoCloseReader - whether to automatically close the reader when the end of origin entries has been reached (i.e. when hasNext() returns false)

OriginEntryFileIterator

public OriginEntryFileIterator(File file)

Constructs a OriginEntryFileIterator When constructed with this method, the file handle will be automatically closed when the end of origin entries has been reached (i.e. when hasNext() returns false)

Parameters:

file - the file

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<OriginEntryFull>

See Also:

Iterator.hasNext()

next

public OriginEntryFull next()

Specified by:

next in interface Iterator<OriginEntryFull>

See Also:

Iterator.next()

remove

public void remove()

Specified by:

remove in interface Iterator<OriginEntryFull>

See Also:

Iterator.remove()

fetchNextEntry

protected void fetchNextEntry()

This method returns the next line in origin entry file

finalize

protected void finalize()
                 throws Throwable

Overrides:

finalize in class Object

Throws:

Throwable

See Also:

Object.finalize()