WSDLProvisionHandler.java

/**
 * Copyright (C) 2008 - 2014 52°North Initiative for Geospatial Open Source
 * Software GmbH
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * If the program is linked with libraries which are licensed under one of
 * the following licenses, the combination of the program with the linked
 * library is not considered a "derivative work" of the program:
 *
 *     - Apache License, version 2.0
 *     - Apache Software License, version 1.0
 *     - GNU Lesser General Public License, version 3
 *     - Mozilla Public License, versions 1.0, 1.1 and 2.0
 *     - Common Development and Distribution License (CDDL), version 1.0
 *
 * Therefore the distribution of the program linked with libraries licensed
 * under the aforementioned licenses, is permitted by the copyright holders
 * if the distribution is compliant with both the GNU General Public
 * icense version 2 and the aforementioned licenses.
 *
 * 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 General
 * Public License for more details.
 */
package org.n52.ses.common.environment.handler;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.muse.core.platform.mini.MiniIsolationLayer;
import org.apache.xmlbeans.XmlObject;
import org.n52.ses.util.common.ConfigurationRegistry;
import org.n52.ses.wsbr.RegisterPublisher;
import org.n52.ses.wsn.SESSubscriptionManager;

public class WSDLProvisionHandler extends GetRequestHandler {

	private XmlObject sesPortTypeWsdl;
	private XmlObject subMgrWsdl;
	private XmlObject prmWsdl;

	@Override
	public boolean canHandle(HttpServletRequest req) {
		if (req.getParameterMap().size() == 1 &&
				req.getParameterMap().containsKey("wsdl")) {
			return true;
		}
		
		return false;
	}

	@Override
	public String handleRequest(HttpServletRequest req, HttpServletResponse resp,
			ConfigurationRegistry conf, MiniIsolationLayer isolationLayer) throws Exception {
		/*
		 * check if its a wsdl request
		 */
		return createWSDL(req, resp, conf);
	}

	private String createWSDL(HttpServletRequest req, HttpServletResponse resp,
			ConfigurationRegistry conf) throws IOException {
		/*
		 * do we have the config init?
		 */
		if (conf != null) {

			String uri = req.getRequestURI();

			/*
			 * TODO: is there some way to retrieve the port types dynamically?
			 */
			if (uri.endsWith(SESSubscriptionManager.CONTEXT_PATH)) {
				if (this.subMgrWsdl == null) {
					this.subMgrWsdl = createXMLFile(getClass().getResourceAsStream("/wsdl/public/SESsubmgr.wsdl"), conf);
				}
				return prepareWSDLFile(this.subMgrWsdl, req, resp);
			} else if (uri.endsWith(RegisterPublisher.RESOURCE_TYPE)) {
				if (this.prmWsdl == null) {
					this.prmWsdl = createXMLFile(getClass().getResourceAsStream("/wsdl/public/SESprm.wsdl"), conf);
				}
				return prepareWSDLFile(this.prmWsdl, req, resp);
			} else {
				if (this.sesPortTypeWsdl == null) {
					this.sesPortTypeWsdl = createXMLFile(getClass().getResourceAsStream("/wsdl/public/SESallinone.wsdl"), conf);
				}
				return prepareWSDLFile(this.sesPortTypeWsdl, req, resp);
			}
		}
		else {
			/*
			 * throw exception, the environment was not init yet
			 */
			throw new IOException("The resource environment has not been initialized yet.");
		}
	}

	private String prepareWSDLFile(XmlObject wsdlObject, HttpServletRequest req, HttpServletResponse resp) throws IOException {
		String result = prepareXMLFile(wsdlObject, req, resp);
		resp.setContentType("application/wsdl+xml");
		return result;
	}
	
}