de.hpi.fgis.dude.database
Class DatabaseSource.DatabaseSourceIterator

java.lang.Object
  de.hpi.fgis.dude.util.AbstractIterator<DuDeObject>
      de.hpi.fgis.dude.datasource.AbstractDataSource.AbstractDataSourceIterator<DatabaseSource>
          de.hpi.fgis.dude.database.DatabaseSource.DatabaseSourceIterator

All Implemented Interfaces:

Iterator<DuDeObject>

Enclosing class:

DatabaseSource

protected class DatabaseSource.DatabaseSourceIterator
extends AbstractDataSource.AbstractDataSourceIterator<DatabaseSource>

DatabaseSourceIterator is used for generating DuDeObjects out of DatabaseSources.

Author:

Matthias Pohl

Field Summary

Fields inherited from class de.hpi.fgis.dude.datasource.AbstractDataSource.AbstractDataSourceIterator

dataSource

Constructor Summary

protected

DatabaseSource.DatabaseSourceIterator(DatabaseSource source) Initializes a DatabaseSourceIterator using the passed DatabaseSource.

Method Summary

protected JsonRecord

loadNextRecord() Returns the data of the next object.

Methods inherited from class de.hpi.fgis.dude.datasource.AbstractDataSource.AbstractDataSourceIterator

addAttributeValue, loadNextElement, setAttributeValue

Methods inherited from class de.hpi.fgis.dude.util.AbstractIterator

hasNext, next, remove

Methods inherited from class java.lang.Object

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

Constructor Detail

DatabaseSource.DatabaseSourceIterator

protected DatabaseSource.DatabaseSourceIterator(DatabaseSource source)
                                         throws SQLException

Initializes a DatabaseSourceIterator using the passed DatabaseSource.

Parameters:

source - The source of which the data shall be extracted.

Throws:

SQLException - If an error occurred while requesting the data.

Method Detail

loadNextRecord

protected JsonRecord loadNextRecord()
                             throws ExtractionFailedException

Description copied from class: AbstractDataSource.AbstractDataSourceIterator

Returns the data of the next object. This method will be called within AbstractDataSource.AbstractDataSourceIterator.loadNextElement().

Specified by:

loadNextRecord in class AbstractDataSource.AbstractDataSourceIterator<DatabaseSource>

Returns:

The data record of the next object.

Throws:

ExtractionFailedException - If an error occurs while extracting the data.