/* 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.HistoricDetail;
import org.activiti.engine.history.HistoricVariableUpdate;
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 HistoricDetailDataResource {
@Autowired
protected RestResponseFactory restResponseFactory;
@Autowired
protected HistoryService historyService;
@RequestMapping(value="/history/historic-detail/{detailId}/data", method = RequestMethod.GET)
public @ResponseBody byte[] getVariableData(@PathVariable("detailId") String detailId, HttpServletRequest request, HttpServletResponse response) {
try {
byte[] result = null;
RestVariable variable = getVariableFromRequest(true, detailId, 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 detailId, HttpServletRequest request) {
Object value = null;
HistoricVariableUpdate variableUpdate = null;
HistoricDetail detailObject = historyService.createHistoricDetailQuery().id(detailId).singleResult();
if (detailObject instanceof HistoricVariableUpdate) {
variableUpdate = (HistoricVariableUpdate) detailObject;
value = variableUpdate.getValue();
}
if (value == null) {
throw new ActivitiObjectNotFoundException("Historic detail '" + detailId + "' doesn't have a variable value.", VariableInstanceEntity.class);
} else {
String serverRootUrl = request.getRequestURL().toString();
return restResponseFactory.createRestVariable(variableUpdate.getVariableName(), value, null, detailId,
RestResponseFactory.VARIABLE_HISTORY_DETAIL, includeBinary, serverRootUrl.substring(0, serverRootUrl.indexOf("/history/historic-detail/")));
}
}
}