/**
 *  Copyright (C) 2004 Orbeon, Inc.
 *
 *  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
 *  2.1 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.
 *
 *  The full text of the license is available at http://www.gnu.org/copyleft/lesser.html
 */
package org.orbeon.oxf.resources.handler;

import org.orbeon.oxf.common.OXFException;
import org.orbeon.oxf.resources.ResourceManagerWrapper;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;

public class OXFHandler extends URLStreamHandler {

    public static final String PROTOCOL = "oxf";

    protected URLConnection openConnection(URL url) throws IOException {
        return new URLConnection(url) {

            private String key;

            private String getKey() {
                if (key == null) {
                    String urlString = getURL().toExternalForm();
                    if (!urlString.startsWith(PROTOCOL+":"))
                        throw new OXFException("Orbeon Forms URL must start with oxf:");
                    key = urlString.substring(PROTOCOL.length()+1, urlString.length());
                }
                return key;
            }

            public void connect() { /* nop */
            }

            public InputStream getInputStream() {
                return ResourceManagerWrapper.instance().getContentAsStream(getKey());
            }

            public OutputStream getOutputStream() {
                return ResourceManagerWrapper.instance().getOutputStream(getKey());
            }

            public long getLastModified() {
                return ResourceManagerWrapper.instance().lastModified(getKey(), false);
            }

            public int getContentLength() {
                return ResourceManagerWrapper.instance().length(getKey());
            }
        };
    }

    protected void parseURL(URL u, String spec, int start, int limit) {
        super.parseURL(u, spec, start, limit);
    }

    protected void setURL(URL u, String protocol, String host, int port,
                          String authority, String userInfo, String path,
                          String query, String ref) {
        super.setURL(u, protocol, null, port, authority, userInfo, host + path, query, ref);
    }
}