/* 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.activiti.rest.service.api.runtime.task;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.ActivitiIllegalArgumentException;
import org.activiti.engine.history.HistoricTaskInstance;
import org.activiti.engine.task.Attachment;
import org.activiti.engine.task.Task;
import org.activiti.rest.service.api.engine.AttachmentRequest;
import org.activiti.rest.service.api.engine.AttachmentResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
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;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import com.fasterxml.jackson.databind.ObjectMapper;
/**
* @author Frederik Heremans
*/
@RestController
public class TaskAttachmentCollectionResource extends TaskBaseResource {
@Autowired
protected ObjectMapper objectMapper;
@RequestMapping(value="/runtime/tasks/{taskId}/attachments", method = RequestMethod.GET, produces="application/json")
public List<AttachmentResponse> getAttachments(@PathVariable String taskId, HttpServletRequest request) {
List<AttachmentResponse> result = new ArrayList<AttachmentResponse>();
HistoricTaskInstance task = getHistoricTaskFromRequest(taskId);
String serverRootUrl = request.getRequestURL().toString();
serverRootUrl = serverRootUrl.substring(0, serverRootUrl.indexOf("/runtime/tasks/"));
for (Attachment attachment : taskService.getTaskAttachments(task.getId())) {
result.add(restResponseFactory.createAttachmentResponse(attachment, serverRootUrl));
}
return result;
}
@RequestMapping(value="/runtime/tasks/{taskId}/attachments", method = RequestMethod.POST, produces="application/json")
public AttachmentResponse createAttachment(@PathVariable String taskId, HttpServletRequest request, HttpServletResponse response) {
String serverRootUrl = request.getRequestURL().toString();
serverRootUrl = serverRootUrl.substring(0, serverRootUrl.indexOf("/runtime/tasks/"));
AttachmentResponse result = null;
Task task = getTaskFromRequest(taskId);
if (request instanceof MultipartHttpServletRequest) {
result = createBinaryAttachment((MultipartHttpServletRequest) request, task, serverRootUrl, response);
} else {
AttachmentRequest attachmentRequest = null;
try {
attachmentRequest = objectMapper.readValue(request.getInputStream(), AttachmentRequest.class);
} catch (Exception e) {
throw new ActivitiIllegalArgumentException("Failed to serialize to a AttachmentRequest instance", e);
}
if (attachmentRequest == null) {
throw new ActivitiIllegalArgumentException("AttachmentRequest properties not found in request");
}
result = createSimpleAttachment(attachmentRequest, task, serverRootUrl);
}
response.setStatus(HttpStatus.CREATED.value());
return result;
}
protected AttachmentResponse createSimpleAttachment(AttachmentRequest attachmentRequest,
Task task, String serverRootUrl) {
if (attachmentRequest.getName() == null) {
throw new ActivitiIllegalArgumentException("Attachment name is required.");
}
Attachment createdAttachment = taskService.createAttachment(attachmentRequest.getType(), task.getId(),
task.getProcessInstanceId(), attachmentRequest.getName(), attachmentRequest.getDescription(), attachmentRequest.getExternalUrl());
return restResponseFactory.createAttachmentResponse(createdAttachment, serverRootUrl);
}
protected AttachmentResponse createBinaryAttachment(MultipartHttpServletRequest request, Task task,
String serverRootUrl, HttpServletResponse response) {
String name = null;
String description = null;
String type = null;
Map<String, String[]> paramMap = request.getParameterMap();
for (String parameterName : paramMap.keySet()) {
if (paramMap.get(parameterName).length > 0) {
if (parameterName.equalsIgnoreCase("name")) {
name = paramMap.get(parameterName)[0];
} else if (parameterName.equalsIgnoreCase("description")) {
description = paramMap.get(parameterName)[0];
} else if (parameterName.equalsIgnoreCase("type")) {
type = paramMap.get(parameterName)[0];
}
}
}
if (name == null) {
throw new ActivitiIllegalArgumentException("Attachment name is required.");
}
if (request.getFileMap().size() == 0) {
throw new ActivitiIllegalArgumentException("Attachment content is required.");
}
MultipartFile file = request.getFileMap().values().iterator().next();
if (file == null) {
throw new ActivitiIllegalArgumentException("Attachment content is required.");
}
try {
Attachment createdAttachment = taskService.createAttachment(type, task.getId(), task.getProcessInstanceId(), name,
description, file.getInputStream());
response.setStatus(HttpStatus.CREATED.value());
return restResponseFactory.createAttachmentResponse(createdAttachment, serverRootUrl);
} catch (Exception e) {
throw new ActivitiException("Error creating attachment response", e);
}
}
}