DS-3905; add a custom RestController

dspace-spring-rest/src/main/java/org/dspace/app/rest/IdentifierRestController.java

@@ -0,0 +1,105 @@
+/**
+ * The contents of this file are subject to the license and copyright
+ * detailed in the LICENSE and NOTICE files at the root of the source
+ * tree and available online at
+ *
+ * http://www.dspace.org/license/
+ */
+package org.dspace.app.rest;
+
+import java.util.Arrays;
+import java.util.ArrayList;
+import java.util.List;
+import java.sql.SQLException;
+import org.dspace.app.rest.link.HalLinkService;
+import java.io.IOException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import org.dspace.content.DSpaceObject;
+import org.dspace.core.Context;
+import org.dspace.handle.factory.HandleServiceFactory;
+import org.dspace.handle.service.HandleService;
+import org.apache.log4j.Logger;
+import org.springframework.hateoas.Link;
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/pid")
+public class IdentifierRestController implements InitializingBean {
+
+    private static final Logger log = Logger.getLogger(IdentifierRestController.class);
+
+    @Autowired
+    DiscoverableEndpointsService discoverableEndpointsService;
+
+    @Autowired
+    private HalLinkService halLinkService;
+
+    @Override
+    public void afterPropertiesSet() throws Exception {
+	List<Link> links = new ArrayList<Link>();
+
+        Link l = new Link("/api/pid/handles", "handles");
+	links.add ( l );
+    }
+
+    /**
+     *
+     */
+    @RequestMapping(method = {RequestMethod.GET,RequestMethod.HEAD}, value = "/handles/{prefix}/{suffix}")
+    @SuppressWarnings("unchecked")
+    public void getDSObyHandle (@PathVariable String prefix, 
+				@PathVariable String suffix, 
+				HttpServletResponse response, 
+				HttpServletRequest request)  throws IOException, SQLException {
+
+	HandleService handleService = HandleServiceFactory.getInstance().getHandleService();
+	Context context = null;
+	DSpaceObject dso = null;
+	try {
+	    context = new Context();
+	    dso = handleService.resolveToObject ( context, 
+						  prefix + "/" + suffix );
+	    if ( dso != null ) {
+		int type = dso.getType();
+		String model = getModel ( dso.getType() );
+		response.setStatus ( HttpServletResponse.SC_FOUND );
+		response.sendRedirect ( "/spring-rest/api/core/" 
+					+ model + "/" + dso.getID() );
+	    }
+	    else {
+		response.setStatus ( HttpServletResponse.SC_NOT_FOUND );
+	    }
+	}
+	catch ( SQLException e ) {
+	    log.error ( "DBG " + e.getMessage() );
+	}
+    }
+
+    /**
+     *
+     */
+    private String getModel ( int i ) {
+
+	String model = new String();
+	switch ( i ) {
+	    case 2:
+		model =  "items";
+		break;
+	    case 3:
+		model = "collections";
+		break;
+	    case 4:
+		model =  "communities";
+		break;
+	    default:
+		model =  "items";
+	}
+	return model;
+    }
+}