| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.clerezza.platform.scripting; |
| |
| import java.util.Iterator; |
| import javax.script.Bindings; |
| import javax.script.ScriptException; |
| import javax.script.SimpleBindings; |
| import javax.ws.rs.GET; |
| import javax.ws.rs.WebApplicationException; |
| import javax.ws.rs.core.Context; |
| import javax.ws.rs.core.HttpHeaders; |
| import javax.ws.rs.core.Request; |
| import javax.ws.rs.core.Response; |
| import javax.ws.rs.core.Response.Status; |
| import javax.ws.rs.core.UriInfo; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.apache.clerezza.jaxrs.utils.TrailingSlash; |
| import org.apache.clerezza.platform.graphprovider.content.ContentGraphProvider; |
| import org.apache.clerezza.platform.typehandlerspace.SupportedTypes; |
| import org.apache.clerezza.rdf.core.NonLiteral; |
| import org.apache.clerezza.rdf.core.Triple; |
| import org.apache.clerezza.rdf.core.UriRef; |
| import org.apache.clerezza.rdf.ontologies.SCRIPT; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Property; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.Service; |
| |
| /** |
| * This class handles HTTP GET requests to resources of type ScriptGeneratedResource. |
| * |
| * @author daniel, hasan |
| * |
| * @see org.apache.clerezza.rdf.ontologies.SCRIPT#ScriptGeneratedResource |
| * |
| */ |
| @Component |
| @Service(Object.class) |
| @Property(name="org.apache.clerezza.platform.typehandler", boolValue=true) |
| @SupportedTypes(types = { "http://clerezza.org/2009/07/script#ScriptGeneratedResource" }, prioritize = true) |
| public class ScriptGeneratedResourceTypeHandler { |
| |
| private static final Logger logger = |
| LoggerFactory.getLogger(ScriptGeneratedResourceTypeHandler.class); |
| |
| @Reference |
| private ContentGraphProvider cgProvider; |
| |
| @Reference |
| private ScriptExecution scriptExecution; |
| |
| /** |
| * Handles HTTP GET requests for resources of type ScriptGeneratedResource. |
| * |
| * The generated resource is either a GraphNode or a response with |
| * the media type specified by the producedType property |
| * of the associated script. |
| * |
| * GraphNodes can be rendered by Renderlets registered for the type |
| * of the GraphNode. |
| * |
| * {@code UriInfo}, {@code Request}, and {@code HttpHeaders} are provided |
| * to the generating script for use in execution. In a script, they are |
| * accessible under the names: uriInfo, request, and httpHeaders respectively. |
| * |
| * @param uriInfo |
| * info about the request URI. |
| * @param request |
| * helper for request processing |
| * @param httpHeaders |
| * provides access to HTTP header information |
| * |
| * @return The generated resource. If no script is found, a NOT FOUND (404) |
| * response is returned. |
| * |
| * @see org.apache.clerezza.rdf.ontologies.SCRIPT#producedType |
| * @see org.apache.clerezza.platform.typerendering.Renderlet |
| */ |
| @GET |
| public Object get(@Context UriInfo uriInfo, @Context Request request, |
| @Context HttpHeaders httpHeaders) { |
| TrailingSlash.enforceNotPresent(uriInfo); |
| |
| UriRef requestUri = new UriRef(uriInfo.getAbsolutePath().toString()); |
| Iterator<Triple> it = cgProvider.getContentGraph(). |
| filter(requestUri, SCRIPT.scriptSource, null); |
| |
| if(it.hasNext()) { |
| NonLiteral scriptResource = (NonLiteral) it.next().getObject(); |
| try { |
| Bindings bindings = new SimpleBindings(); |
| bindings.put("uriInfo", uriInfo); |
| bindings.put("request", request); |
| bindings.put("httpHeaders", httpHeaders); |
| return scriptExecution.execute(scriptResource, bindings); |
| } catch (ScriptException ex) { |
| logger.warn("Exception while executing script {}", |
| ((UriRef) scriptResource).getUnicodeString()); |
| throw new WebApplicationException( |
| Response.status(Status.INTERNAL_SERVER_ERROR). |
| entity(ex.getMessage()).build()); |
| } |
| } |
| |
| logger.warn("There is no script associated with {}", |
| requestUri.getUnicodeString()); |
| return Response.status(Status.NOT_FOUND).build(); |
| } |
| |
| } |