/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-07 The eXist Project
* http://exist-db.org
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* $Id: Handler.java 189 2007-03-30 15:02:18Z dizzzz $
*/
package org.exist.protocolhandler.protocols.xmldb;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;
import org.apache.log4j.Logger;
/**
* A stream protocol handler knows how to make a connection for a particular
* protocol type. This handler deals with "xmldb:"
*
* @author Dannes Wessels
*
* @see <A HREF="http://java.sun.com/developer/onlineTraining/protocolhandlers/"
* >A New Era for Java Protocol Handlers</A>
* @see java.net.URLStreamHandler
*/
public class Handler extends URLStreamHandler {
private final static Logger LOG = Logger.getLogger(Handler.class);
public static final String XMLDB_EXIST = "xmldb:exist:";
public static final String XMLDB = "xmldb:";
public static final String PATTERN = "xmldb:[\\w]+:\\/\\/.*";
/**
* Creates a new instance of Handler
*/
public Handler() {
LOG.debug("Setup \"xmldb:exist:\" handler");
}
/**
* @see java.net.URLStreamHandler#parseURL(java.net.URL,java.lang.String,int,int)
*
* TODO: exist instance names must be supported. The idea is to pass
* this information as a parameter to the url, format __instance=XXXXX
* Should we clean all other params? remove #?
*/
protected void parseURL(URL url, String spec, int start, int limit) {
LOG.debug(spec);
if(spec.startsWith(XMLDB_EXIST+"//")){
LOG.debug("Parsing xmldb:exist:// URL.");
super.parseURL(url, spec, XMLDB_EXIST.length(), limit);
} else if(spec.startsWith(XMLDB+"//")) {
LOG.debug("Parsing xmldb:// URL.");
super.parseURL(url, spec, XMLDB.length(), limit);
} else if(spec.matches(PATTERN)) {
LOG.debug("Parsing URL with custom exist instance");
String splits[] = spec.split(":",3);
String instance = splits[1]; // TODO pass to URL as param
int seperator = spec.indexOf("//");
super.parseURL(url, spec, seperator, limit);
} else if(spec.startsWith("xmldb:://")){ // very dirty
int seperator = spec.indexOf("//");
super.parseURL(url, spec, seperator, limit);
} else if(spec.startsWith("xmldb:/")){ // little dirty
super.parseURL(url, spec, start, limit);
} else {
LOG.error("Expected 'xmldb:'-like URL, found "+spec);
super.parseURL(url, spec, start, limit);
}
}
/**
* @see java.net.URLStreamHandler#openConnection(java.net.URL)
*/
protected URLConnection openConnection(URL u) throws IOException {
return new Connection(u);
}
}