| /** |
| * |
| * Copyright 2009-2011 Rickard Öberg AB |
| * |
| * Licensed 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.qi4j.library.rest.server.restlet.responsewriter; |
| |
| import freemarker.template.Configuration; |
| import freemarker.template.TemplateException; |
| import java.io.IOException; |
| import java.io.Writer; |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import org.qi4j.api.injection.scope.Service; |
| import org.qi4j.functional.Iterables; |
| import org.qi4j.library.rest.common.Resource; |
| import org.qi4j.library.rest.common.link.LinksUtil; |
| import org.restlet.Response; |
| import org.restlet.data.MediaType; |
| import org.restlet.data.Method; |
| import org.restlet.representation.Representation; |
| import org.restlet.representation.StringRepresentation; |
| import org.restlet.representation.WriterRepresentation; |
| import org.restlet.resource.ResourceException; |
| |
| /** |
| * ResponseWriter for ResourceValues |
| */ |
| public class ResourceResponseWriter extends AbstractResponseWriter |
| { |
| private static final List<MediaType> supportedMediaTypes = Arrays.asList( MediaType.TEXT_HTML, MediaType.APPLICATION_JSON, MediaType.APPLICATION_ATOM ); |
| |
| @Service |
| private Configuration cfg; |
| |
| @Override |
| public boolean writeResponse( final Object result, final Response response ) |
| throws ResourceException |
| { |
| if( result instanceof Resource ) |
| { |
| Resource resourceValue = (Resource) result; |
| |
| // Allowed methods |
| response.getAllowedMethods().add( Method.GET ); |
| if( Iterables.matchesAny( LinksUtil.withRel( "delete" ), resourceValue.commands().get() ) ) |
| { |
| response.getAllowedMethods().add( Method.DELETE ); |
| } |
| if( Iterables.matchesAny( LinksUtil.withRel( "update" ), resourceValue.commands().get() ) ) |
| { |
| response.getAllowedMethods().add( Method.PUT ); |
| } |
| |
| // Response according to what client accepts |
| MediaType type = getVariant( response.getRequest(), ENGLISH, supportedMediaTypes ).getMediaType(); |
| if( MediaType.APPLICATION_JSON.equals( type ) ) |
| { |
| response.setEntity( new StringRepresentation( resourceValue.toString(), MediaType.APPLICATION_JSON ) ); |
| return true; |
| } |
| else if( MediaType.TEXT_HTML.equals( type ) ) |
| { |
| Representation rep = new WriterRepresentation( MediaType.TEXT_HTML ) |
| { |
| @Override |
| public void write( Writer writer ) |
| throws IOException |
| { |
| Map<String, Object> context = new HashMap<String, Object>(); |
| context.put( "request", response.getRequest() ); |
| context.put( "response", response ); |
| context.put( "result", result ); |
| try |
| { |
| cfg.getTemplate( "resource.htm" ).process( context, writer ); |
| } |
| catch( TemplateException e ) |
| { |
| throw new IOException( e ); |
| } |
| } |
| }; |
| response.setEntity( rep ); |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| } |