| /* |
| * Copyright (C) 2011 The University of Manchester |
| * |
| * See the file "LICENSE.txt" for license terms. |
| */ |
| package org.taverna.server.master.rest.handler; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.lang.annotation.Annotation; |
| import java.lang.reflect.Type; |
| |
| import javax.ws.rs.WebApplicationException; |
| import javax.ws.rs.core.MediaType; |
| import javax.ws.rs.core.MultivaluedMap; |
| import javax.ws.rs.ext.MessageBodyReader; |
| import javax.ws.rs.ext.MessageBodyWriter; |
| import javax.ws.rs.ext.Provider; |
| |
| import org.taverna.server.master.common.Workflow; |
| |
| import uk.org.taverna.scufl2.api.io.ReaderException; |
| import uk.org.taverna.scufl2.api.io.WorkflowBundleIO; |
| import uk.org.taverna.scufl2.api.io.WriterException; |
| |
| /** |
| * Handler that allows a .scufl2 document to be read from and written to a REST |
| * message directly. |
| * |
| * @author Donal Fellows |
| */ |
| @Provider |
| public class Scufl2DocumentHandler implements MessageBodyReader<Workflow>, |
| MessageBodyWriter<Workflow> { |
| private static final MediaType SCUFL2_TYPE = new MediaType("application", |
| "vnd.taverna.scufl2.workflow-bundle"); |
| public static final String SCUFL2 = "application/vnd.taverna.scufl2.workflow-bundle"; |
| private WorkflowBundleIO io = new WorkflowBundleIO(); |
| |
| @Override |
| public boolean isReadable(Class<?> type, Type genericType, |
| Annotation[] annotations, MediaType mediaType) { |
| if (type.isAssignableFrom(Workflow.class)) |
| return mediaType.isCompatible(SCUFL2_TYPE); |
| return false; |
| } |
| |
| @Override |
| public Workflow readFrom(Class<Workflow> type, Type genericType, |
| Annotation[] annotations, MediaType mediaType, |
| MultivaluedMap<String, String> httpHeaders, InputStream entityStream) |
| throws IOException, WebApplicationException { |
| try { |
| return new Workflow(io.readBundle(entityStream, SCUFL2)); |
| } catch (ReaderException e) { |
| throw new WebApplicationException(e, 403); |
| } |
| } |
| |
| @Override |
| public boolean isWriteable(Class<?> type, Type genericType, |
| Annotation[] annotations, MediaType mediaType) { |
| if (Workflow.class.isAssignableFrom(type)) |
| return mediaType.isCompatible(SCUFL2_TYPE); |
| return false; |
| } |
| |
| @Override |
| public long getSize(Workflow workflow, Class<?> type, Type genericType, |
| Annotation[] annotations, MediaType mediaType) { |
| return -1; |
| } |
| |
| @Override |
| public void writeTo(Workflow workflow, Class<?> type, Type genericType, |
| Annotation[] annotations, MediaType mediaType, |
| MultivaluedMap<String, Object> httpHeaders, |
| OutputStream entityStream) throws IOException, |
| WebApplicationException { |
| try { |
| io.writeBundle(workflow.getScufl2Workflow(), entityStream, SCUFL2); |
| } catch (WriterException e) { |
| throw new WebApplicationException(e); |
| } |
| } |
| } |