001/* 002 * (C) Copyright 2014 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * <a href="mailto:grenard@nuxeo.com">Guillaume Renard</a> 018 * 019 */ 020 021package org.nuxeo.ecm.restapi.server.jaxrs.routing.io; 022 023import java.io.IOException; 024import java.io.OutputStream; 025import java.lang.annotation.Annotation; 026import java.lang.reflect.Type; 027import java.util.List; 028 029import javax.servlet.http.HttpServletRequest; 030import javax.ws.rs.Produces; 031import javax.ws.rs.WebApplicationException; 032import javax.ws.rs.core.Context; 033import javax.ws.rs.core.MediaType; 034import javax.ws.rs.core.MultivaluedMap; 035import javax.ws.rs.core.UriInfo; 036import javax.ws.rs.ext.Provider; 037 038import org.apache.commons.logging.Log; 039import org.apache.commons.logging.LogFactory; 040import org.codehaus.jackson.JsonEncoding; 041import org.codehaus.jackson.JsonGenerator; 042import org.nuxeo.ecm.automation.jaxrs.io.EntityListWriter; 043import org.nuxeo.ecm.platform.task.Task; 044 045/** 046 * @since 7.2 047 */ 048@Provider 049@Produces({ "application/json+nxentity", "application/json" }) 050public class TaskListWriter extends EntityListWriter<Task> { 051 052 private static final Log log = LogFactory.getLog(TaskListWriter.class); 053 054 @Context 055 HttpServletRequest request; 056 057 @Context 058 UriInfo uriInfo; 059 060 @Override 061 protected String getEntityType() { 062 return "tasks"; 063 } 064 065 @Override 066 protected void writeItem(JsonGenerator jg, Task item) throws IOException { 067 // do nothing, everything is done in #writeTo 068 } 069 070 @Override 071 public void writeTo(List<Task> tasks, Class<?> type, Type genericType, Annotation[] annotations, 072 MediaType mediaType, MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream) 073 throws IOException, WebApplicationException { 074 try { 075 JsonGenerator jg = factory.createJsonGenerator(entityStream, JsonEncoding.UTF8); 076 jg.writeStartObject(); 077 jg.writeStringField("entity-type", "tasks"); 078 jg.writeArrayFieldStart("entries"); 079 for (Task docRoute : tasks) { 080 jg.writeStartObject(); 081 jg.writeStringField("entity-type", "task"); 082 TaskWriter.writeTask(jg, docRoute, request, uriInfo); 083 jg.writeEndObject(); 084 } 085 jg.writeEndArray(); 086 jg.writeEndObject(); 087 jg.flush(); 088 } catch (IOException e) { 089 log.error("Failed to serialize task list", e); 090 throw new WebApplicationException(500); 091 } 092 } 093}