/*
* 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.requestparser;
import javax.servlet.http.HttpServletRequest;
import org.archive.wayback.RequestParser;
import org.archive.wayback.core.WaybackRequest;
import org.archive.wayback.exception.BadQueryException;
import org.archive.wayback.exception.BetterRequestException;
import org.archive.wayback.webapp.AccessPoint;
/**
* Abstract RequestParser implementation. Subclasses must implement
* the getRequestParsers() method. This implementation provides a parse()
* implementation, which allows each RequestParser returned by the
* getRequestParsers() method an attempt at parsing the incoming request.
*
* @author brad
* @version $Date$, $Revision$
*/
public abstract class CompositeRequestParser extends BaseRequestParser {
private RequestParser[] parsers = null;
/**
*
*/
public void init() {
parsers = getRequestParsers();
for(RequestParser r : parsers) {
if(r instanceof BaseRequestParser) {
BaseRequestParser br = (BaseRequestParser) r;
br.setMaxRecords(getMaxRecords());
br.setEarliestTimestamp(getEarliestTimestamp());
br.setLatestTimestamp(getLatestTimestamp());
}
}
}
protected abstract RequestParser[] getRequestParsers();
// A basic example implementation method:
// protected abstract RequestParser[] getRequestParsers() {
// RequestParser[] theParsers = {
// new OpenSearchRequestParser(this),
// new FormRequestParser(this)
// };
// return theParsers;
// }
/* (non-Javadoc)
* @see org.archive.wayback.RequestParser#parse(javax.servlet.http.HttpServletRequest)
*/
public WaybackRequest parse(HttpServletRequest httpRequest,
AccessPoint wbContext) throws BadQueryException, BetterRequestException {
WaybackRequest wbRequest = null;
for(int i = 0; i < parsers.length; i++) {
wbRequest = parsers[i].parse(httpRequest, wbContext);
if(wbRequest != null) {
break;
}
}
return wbRequest;
}
}