Package db

Class ConvertedRecordIterator

java.lang.Object

db.ConvertedRecordIterator

All Implemented Interfaces:

RecordIterator

public abstract class ConvertedRecordIterator
extends Object
implements RecordIterator

ConvertedRecordIterator provides a RecordIterator wrapper for performing record conversion frequently required when using older data.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ConvertedRecordIterator(RecordIterator originalIterator, boolean deleteAllowed)	Constructor.

Method Summary

Modifier and Type	Method	Description
protected abstract DBRecord	convertRecord(DBRecord record)	Convert a record supplied by the underlying RecordIterator.
boolean	delete()	Delete the last Record read via the next or previous methods.
boolean	hasNext()	Return true if a Record is available in the forward direction.
boolean	hasPrevious()	Return true if a Record is available in the reverse direction
DBRecord	next()	Return the next Record or null if one is not available.
DBRecord	previous()	Return the previous Record or null if one is not available.

Methods inherited from class java.lang.Object

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

Constructor Details

ConvertedRecordIterator

protected ConvertedRecordIterator(RecordIterator originalIterator,
 boolean deleteAllowed)

Constructor.

Parameters:

originalIterator -

deleteAllowed - if false and delete is attempted, delete will throw an UnsupportedOperationException

Method Details

delete

public boolean delete()
               throws IOException

Description copied from interface: RecordIterator

Delete the last Record read via the next or previous methods.

Specified by:

delete in interface RecordIterator

Returns:

true if record was successfully deleted.

Throws:

IOException - thrown if an IO error occurs.

See Also:

• RecordIterator.delete()

hasNext

public boolean hasNext()
                throws IOException

Description copied from interface: RecordIterator

Return true if a Record is available in the forward direction.

Specified by:

hasNext in interface RecordIterator

Throws:

IOException - thrown if an IO error occurs

See Also:

• RecordIterator.hasNext()

hasPrevious

public boolean hasPrevious()
                    throws IOException

Description copied from interface: RecordIterator

Return true if a Record is available in the reverse direction

Specified by:

hasPrevious in interface RecordIterator

Throws:

IOException - thrown if an IO error occurs

See Also:

• RecordIterator.hasPrevious()

next

public DBRecord next()
              throws IOException

Description copied from interface: RecordIterator

Return the next Record or null if one is not available.

Specified by:

next in interface RecordIterator

Throws:

IOException - thrown if an IO error occurs

See Also:

• RecordIterator.next()

previous

public DBRecord previous()
                  throws IOException

Description copied from interface: RecordIterator

Return the previous Record or null if one is not available.

Specified by:

previous in interface RecordIterator

Throws:

IOException - thrown if an IO error occurs

See Also:

• RecordIterator.previous()

convertRecord

protected abstract DBRecord convertRecord(DBRecord record)

Convert a record supplied by the underlying RecordIterator.

Parameters:

record -

Returns:

converted record