de.tudarmstadt.ukp.jwktl.api.entry

Class BerkeleyDBWiktionaryIterator<OutputType,InputType extends OutputType>

java.lang.Object

de.tudarmstadt.ukp.jwktl.api.util.WiktionaryIterator<OutputType>

de.tudarmstadt.ukp.jwktl.api.entry.BerkeleyDBWiktionaryIterator<OutputType,InputType>

Type Parameters:

OutputType - the class type that is returned for each fetched element.

InputType - the class type the stored entities have. It is necessary that the input type is the same or a subclass of the type specified as output.

All Implemented Interfaces:

IWiktionaryIterator<OutputType>, Iterable<OutputType>, Iterator<OutputType>

public class BerkeleyDBWiktionaryIterator<OutputType,InputType extends OutputType>
extends WiktionaryIterator<OutputType>

Implementation of the WiktionaryIterator for the use of a Berkeley DB EntityCursor as a source of elements. The cursor is passed to the constructor and automatically closed upon manually termination of the iteration or after all elements have been traversed. Additionally, a hotspot is provided to react on the return of an element of the cursor to, e.g., initialize the entity. It is possible to convert the stored entity to a more general type using different type parameters.

Field Summary

Fields

Modifier and Type	Field and Description
protected com.sleepycat.persist.EntityCursor<InputType>	cursor
protected BerkeleyDBWiktionaryEdition	edition

Fields inherited from class de.tudarmstadt.ukp.jwktl.api.util.WiktionaryIterator

closed, nextValue

Constructor Summary

Constructors

Constructor and Description
BerkeleyDBWiktionaryIterator(BerkeleyDBWiktionaryEdition edition, com.sleepycat.persist.EntityCursor<InputType> cursor) Initializes the iterator for the specified cursor.

Method Summary

Methods

Modifier and Type	Method and Description
protected void	doClose() Hotspot that is invoked after closing the iteration, i.e.
protected OutputType	fetchNext() Hotspot for fetching the next element for iteration.
protected OutputType	loadEntity(InputType entity) Hotspot that is invoked when returning an entity.

Methods inherited from class de.tudarmstadt.ukp.jwktl.api.util.WiktionaryIterator

close, hasNext, isClosed, iterator, next, remove

Methods inherited from class java.lang.Object

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

Field Detail

edition

protected BerkeleyDBWiktionaryEdition edition

cursor

protected com.sleepycat.persist.EntityCursor<InputType extends OutputType> cursor

Constructor Detail

BerkeleyDBWiktionaryIterator

public BerkeleyDBWiktionaryIterator(BerkeleyDBWiktionaryEdition edition,
                            com.sleepycat.persist.EntityCursor<InputType> cursor)

Initializes the iterator for the specified cursor.

Method Detail

fetchNext

protected OutputType fetchNext()

Description copied from class: WiktionaryIterator

Hotspot for fetching the next element for iteration. If there are no elements left, null is to be returned, which causes the iterator to return false for the next WiktionaryIterator.hasNext().

Specified by:

fetchNext in class WiktionaryIterator<OutputType>

loadEntity

protected OutputType loadEntity(InputType entity)

Hotspot that is invoked when returning an entity. It can, e.g., be used to initialize the entity before usage.

doClose

protected void doClose()

Description copied from class: WiktionaryIterator

Hotspot that is invoked after closing the iteration, i.e. either all items are traversed or manual termination. The hotspot is called only once.

Specified by:

doClose in class WiktionaryIterator<OutputType>