/* 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.history; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.ObjectOutputStream; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.activiti.engine.ActivitiException; import org.activiti.engine.ActivitiObjectNotFoundException; import org.activiti.engine.HistoryService; import org.activiti.engine.history.HistoricProcessInstance; import org.activiti.engine.impl.persistence.entity.HistoricProcessInstanceEntity; import org.activiti.engine.impl.persistence.entity.VariableInstanceEntity; import org.activiti.rest.service.api.RestResponseFactory; import org.activiti.rest.service.api.engine.variable.RestVariable; import org.springframework.beans.factory.annotation.Autowired; 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.ResponseBody; import org.springframework.web.bind.annotation.RestController; /** * @author Tijs Rademakers */ @RestController public class HistoricProcessInstanceVariableDataResource { @Autowired protected RestResponseFactory restResponseFactory; @Autowired protected HistoryService historyService; @RequestMapping(value="/history/historic-process-instances/{processInstanceId}/variables/{variableName}/data", method = RequestMethod.GET) public @ResponseBody byte[] getVariableData(@PathVariable("processInstanceId") String processInstanceId, @PathVariable("variableName") String variableName, HttpServletRequest request, HttpServletResponse response) { try { byte[] result = null; RestVariable variable = getVariableFromRequest(true, processInstanceId, variableName, request); if (RestResponseFactory.BYTE_ARRAY_VARIABLE_TYPE.equals(variable.getType())) { result = (byte[]) variable.getValue(); response.setContentType("application/octet-stream"); } else if (RestResponseFactory.SERIALIZABLE_VARIABLE_TYPE.equals(variable.getType())) { ByteArrayOutputStream buffer = new ByteArrayOutputStream(); ObjectOutputStream outputStream = new ObjectOutputStream(buffer); outputStream.writeObject(variable.getValue()); outputStream.close(); result = buffer.toByteArray(); response.setContentType("application/x-java-serialized-object"); } else { throw new ActivitiObjectNotFoundException("The variable does not have a binary data stream.", null); } return result; } catch(IOException ioe) { // Re-throw IOException throw new ActivitiException("Unexpected exception getting variable data", ioe); } } public RestVariable getVariableFromRequest(boolean includeBinary, String processInstanceId, String variableName, HttpServletRequest request) { HistoricProcessInstance processObject = historyService.createHistoricProcessInstanceQuery() .processInstanceId(processInstanceId).includeProcessVariables().singleResult(); if (processObject == null) { throw new ActivitiObjectNotFoundException("Historic process instance '" + processInstanceId + "' couldn't be found.", HistoricProcessInstanceEntity.class); } Object value = processObject.getProcessVariables().get(variableName); if (value == null) { throw new ActivitiObjectNotFoundException("Historic process instance '" + processInstanceId + "' variable value for " + variableName + " couldn't be found.", VariableInstanceEntity.class); } else { return restResponseFactory.createRestVariable(variableName, value, null, processInstanceId, RestResponseFactory.VARIABLE_HISTORY_PROCESS, includeBinary); } } }