Question: Help me with this programming please! /** * A simplified web crawler, specialized to crawl local URIs rather * than to retrieve remote documents. */
Help me with this programming please!
/**
* A simplified web crawler, specialized to crawl local URIs rather
* than to retrieve remote documents.
*/
public class UriCrawler {
/**
* Instantiates a new UriCrawler. The maximum number of documents a crawler
* will attempt to visit, ever, is limited to visitQuota.
*
* @param visitQuota
* the maximum number of documents a crawler will attempt to
* visit
* @throws IllegalArgumentException
* if maximumRetrievalAttempts is less than one
*/
public UriCrawler(int visitQuota) throws IllegalArgumentException {
if (visitQuota < 1) {
throw new IllegalArgumentException();
}
// TODO
}
/**
* Returns the set of URIs that this crawler has attempted to visit
* (successfully or not).
*
* @return the set of URIs that this crawler has attempted to visit
*/
public Set
// TODO
return null;
}
/**
* Returns the set of RetrievedDocuments corresponding to the URIs
* this crawler has successfully visited.
*
* @return the set of RetrievedDocuments corresponding to the URIs
* this crawler has successfully visited
*/
public Set
// TODO
return null;
}
/**
* Adds a URI to the collections of URIs that this crawler should attempt to
* visit. Does not visit the URI.
*
* @param uri
* the URI to be visited (later!)
*/
public void addUri(URI uri) {
// TODO
}
/**
* Attempts to visit a single as-yet unattempted URI in this crawler's
* collection of to-be-visited URIs.
*
* Visiting a document entails parsing the text and links from the URI.
*
* If the parse succeeds:
*
* - The "file:" links should be added to this crawler's collection of
* to-be-visited URIs.
*
* - A new RetrievedDocument should be added to this crawler's collection of
* successfully visited documents.
*
* If the parse fails, this method considers the visit attempted but
* unsuccessful.
*
* @throws MaximumVisitsExceededException
* if this crawler has already attempted to visit its quota of
* visits
* @throws NoUnvisitedUrisException
* if no more unattempted URI remain in this crawler's
* collection of URIs to visit
*/
public void visitOne() throws MaximumVisitsExceededException, NoUnvisitedUrisException {
// TODO
}
/**
* Attempts to visit all URIs in this crawler (and any URIs they reference,
* and so on).
*
* This method will not raise a MaximumVisitsExceededException if there are
* more URIs than can be visited. It will instead stop once the UriCrawler's
* quota has been reached.
*/
public void visitAll() {
// TODO
}
}
I need to translate bevaiors into code
Please help thank you.
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