org.dice_research.squirrel.fetcher

Interface Fetcher

All Superinterfaces:

AutoCloseable, Closeable

All Known Implementing Classes:

DereferencingFetcher, DumpFetcher, FTPFetcher, HTTPFetcher, JsonFetcher, MicroServiceBasedCkanFetcher, PaginatedCkanFetcher, SimpleCkanFetcher, SimpleOrderedFetcherManager, SparqlBasedFetcher, SparqlDatasetFetcher

public interface Fetcher
extends Closeable

Interface of a class that fetches the data of a given CrawleableUri instance.

Author:

Michael Röder (michael.roeder@uni-paderborn.de)

Method Summary

Modifier and Type	Method and Description
default File	fetch(org.dice_research.squirrel.data.uri.CrawleableUri uri) Fetches a stream of data from the given URI, stores it and returns a File object pointing to the stored data.
File	fetch(org.dice_research.squirrel.data.uri.CrawleableUri uri, Delayer delayer) Fetches a stream of data from the given URI by following the delay implemented by the given Delayer, stores it and returns a File object pointing to the stored data.

Methods inherited from interface java.io.Closeable

close

Method Detail

fetch

default File fetch(org.dice_research.squirrel.data.uri.CrawleableUri uri)
            throws RuntimeException

Fetches a stream of data from the given URI, stores it and returns a File object pointing to the stored data. If an error occurs, null is returned.

Parameters:

uri - The URI from which data should be fetched.

Returns:

A File object pointing to the downloaded data or null if an error occurred.

Throws:

RuntimeException

fetch

File fetch(org.dice_research.squirrel.data.uri.CrawleableUri uri,
           Delayer delayer)

Fetches a stream of data from the given URI by following the delay implemented by the given Delayer, stores it and returns a File object pointing to the stored data. If an error occurs, null is returned.

Parameters:

uri - The URI from which data should be fetched.

Returns:

A File object pointing to the downloaded data or null if an error occurred.