org.dspace.ctask.general
Class BasicLinkChecker

java.lang.Object
  org.dspace.curate.AbstractCurationTask
      org.dspace.ctask.general.BasicLinkChecker

All Implemented Interfaces:

CurationTask

Direct Known Subclasses:

MetadataValueLinkChecker

public class BasicLinkChecker
extends AbstractCurationTask

A basic link checker that is designed to be extended. By default this link checker will check that all links stored in anyschema.anyelement.uri metadata fields return a 20x status code. This link checker can be enhanced by extending this class, and overriding the getURLs and checkURL methods.

Author:

Stuart Lewis

Field Summary

Fields inherited from class org.dspace.curate.AbstractCurationTask

curator, taskId

Constructor Summary

BasicLinkChecker()

Method Summary

protected boolean	checkURL(String url, StringBuilder results) Check the URL and perform appropriate reporting
protected int	getResponseStatus(String url) Get the response code for a URL.
protected List<String>	getURLs(Item item) Get the URLs to check
int	perform(DSpaceObject dso) Perform the link checking.

Methods inherited from class org.dspace.curate.AbstractCurationTask

dereference, distribute, init, perform, performItem, performObject, report, setResult, taskBooleanProperty, taskIntProperty, taskLongProperty, taskProperty

Methods inherited from class java.lang.Object

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

Constructor Detail

BasicLinkChecker

public BasicLinkChecker()

Method Detail

perform

public int perform(DSpaceObject dso)
            throws IOException

Perform the link checking.

Specified by:

perform in interface CurationTask

Specified by:

perform in class AbstractCurationTask

Parameters:

dso - The DSpaaceObject to be checked

Returns:

The curation task status of the checking

Throws:

IOException - THrown if something went wrong

getURLs

protected List<String> getURLs(Item item)

Get the URLs to check

Parameters:

item - The item to extract URLs from

Returns:

An array of URL Strings

checkURL

protected boolean checkURL(String url,
                           StringBuilder results)

Check the URL and perform appropriate reporting

Parameters:

url - The URL to check

Returns:

If the URL was OK or not

getResponseStatus

protected int getResponseStatus(String url)

Get the response code for a URL. If something goes wrong opening the URL, a response code of 0 is returned.

Parameters:

url - The url to open

Returns:

The HTTP response code (e.g. 200 / 301 / 404 / 500)