/*
* This file is part of the Wayback archival access software
* (http://archive-access.sourceforge.net/projects/wayback/).
*
* Licensed to the Internet Archive (IA) by one or more individual
* contributors.
*
* The IA licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.archive.wayback.replay;
import org.archive.wayback.ResultURIConverter;
import org.archive.wayback.core.CaptureSearchResult;
import org.archive.wayback.core.CaptureSearchResults;
import org.archive.wayback.core.WaybackRequest;
import org.archive.wayback.exception.BetterRequestException;
/**
* @author brad
*
*/
public class DateRedirectingClosestResultSelector
implements ClosestResultSelector {
public CaptureSearchResult getClosest(WaybackRequest wbRequest,
CaptureSearchResults results) throws BetterRequestException {
CaptureSearchResult closest = results.getClosest();
String reqDateStr = wbRequest.getReplayTimestamp();
String resDateStr = closest.getCaptureTimestamp();
boolean doRedirect = false;
// if the request date is shorter than the result date, always redirect:
if(reqDateStr.length() < resDateStr.length()) {
doRedirect = true;
} else {
// if the result is not for the exact date requested, redirect to the
// exact date. some capture dates are not 14 digits, only compare as
// many digits as are in the result date:
if(!resDateStr.equals(reqDateStr.substring(0,resDateStr.length()))) {
// If looking for latest date, don't redirect until after checking for errors later
if (!wbRequest.isBestLatestReplayRequest()) {
doRedirect = true;
}
}
}
if(doRedirect) {
doRedirection(wbRequest,closest);
}
return closest;
}
protected void doRedirection(WaybackRequest wbRequest,
CaptureSearchResult closest) throws BetterRequestException {
// redirect to the better version:
String url = closest.getOriginalUrl();
String captureDate = closest.getCaptureTimestamp();
ResultURIConverter uriConverter =
wbRequest.getAccessPoint().getUriConverter();
String betterURI = uriConverter.makeReplayURI(captureDate,url);
throw new BetterRequestException(betterURI);
}
}