org.gcube.datatransformation.datatransformationlibrary.datahandlers

Interface DataSource

All Superinterfaces:

ContentTypeDataSource, DataHandler

All Known Subinterfaces:

DataBridge

All Known Implementing Classes:

FilterDataBridge, REFDataBridge

public interface DataSource
extends DataHandler, ContentTypeDataSource

Author:

Dimitris Katris, NKUA

The DataSource interface is implemented by all classes capable for fetching DataElements from the respective source.

Caution: Sources must also define a constructor (String input, Parameter[] inputParameters). This constructor is used by the service to instantiate the DataSource.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	hasNext() Returns true if the DataSource has more DataElements.
DataElement	next() Returns the next element of the DataSource.

Methods inherited from interface org.gcube.datatransformation.datatransformationlibrary.datahandlers.DataHandler

close, isClosed

Methods inherited from interface org.gcube.datatransformation.datatransformationlibrary.datahandlers.ContentTypeDataSource

nextContentType

Method Detail

hasNext

boolean hasNext()

Returns true if the DataSource has more DataElements.

Specified by:

hasNext in interface ContentTypeDataSource

Returns:

true if the DataSource has more elements.

next

DataElement next()
                 throws Exception

Returns the next element of the DataSource.

Returns:

the next element of the DataSource.

Throws:

Exception