source: MDService2/trunk/MDService2/src/eu/clarin/cmdi/mdservice/action/DCRProxyAction.java @ 519

package eu.clarin.cmdi.mdservice.action;

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

/**
 * Acts as a Struts 2 controller 
 * serves the requests regarding DataCategories
 * it passes them further (Proxy) to the Data Category Registry.
 *   
 * @author vronk 
 *
 */

public class DCRProxyAction extends GenericProxyAction {

        private static final long serialVersionUID = 1L;
        
        private String proxy_key = "dcregistry";
        
        @Override
        public String getProxyKey() {
                return proxy_key;
        }
        
         
        public String getFullFormat() {
                        return "dc2" + getFormat();             
        }
        
        
        /**
         * uses base_url and (optionally) id to form a url
         * no id => ?list all datacategories?
         * @return the URL to data category xml format
         * @throws Exception 
         */
        public URL getTargetRequest() throws IOException {

                URL targetURL = null;
                if (getQ()==null || getQ().equals("")) {
                //      Admin.notifyUser("ERROR DCRProxy.targetURL: missing param Q!");
                        targetURL =new URL( getBaseURL(), getActionkey());
                } else {
                        targetURL =new URL( getBaseURL(), getActionkey() + "/" + getQ());
                }
                Admin.notifyUser("DCRProxy.targetURL:" + targetURL);

            return targetURL;
        }
        
        public InputStream getSourceStream() throws IOException {
        
                /* need to set Request-Property: Accept to xml 
                 * for to get dcif/xml from DCR-server by means of content negotiation */
                URLConnection urlConnection = getTargetRequest().openConnection();
        urlConnection.setRequestProperty("Accept", "application/dcif+xml");
    
        return urlConnection.getInputStream();
    
        }       
}