org.activiti.engine.impl.util.IoUtil Java Examples

The following examples show how to use org.activiti.engine.impl.util.IoUtil. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example #1

Source File: SerializableType.java From activiti6-boot2 with Apache License 2.0

6 votes

public byte[] serialize(Object value, ValueFields valueFields) {
  if (value == null) {
    return null;
  }
  ByteArrayOutputStream baos = new ByteArrayOutputStream();
  ObjectOutputStream oos = null;
  try {
    oos = createObjectOutputStream(baos);
    oos.writeObject(value);
  } catch (Exception e) {
    throw new ActivitiException("Couldn't serialize value '"+value+"' in variable '"+valueFields.getName()+"'", e);
  } finally {
    IoUtil.closeSilently(oos);
  }
  return baos.toByteArray();
}

Example #2

Source File: SimpleFlowWorkController.java From activiti-demo with Apache License 2.0

6 votes

/**
     * 查看流程定义图
     * @param request
     * @param processDefId 流程定义id
     * @return
     */
    @RequestMapping(value = "/viewprocessDefImage.do")
    public String viewprocessDefImage(HttpServletRequest request,
    							 HttpServletResponse response,	
                         @RequestParam("processDefId") String processDefId) throws Exception{
    	//根据流程定义id查询流程定义
        ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().processDefinitionId(processDefId).singleResult();
        
        InputStream inputStream = repositoryService.getResourceAsStream(processDefinition.getDeploymentId(), processDefinition.getDiagramResourceName());
        
//        // 输出资源内容到相应对象
//        byte[] b = new byte[1024];
//        int len;
//        while ((len = inputStream.read(b, 0, 1024)) != -1) {
//        	response.getOutputStream().write(b, 0, len);
//        }
        
        response.getOutputStream().write(IoUtil.readInputStream(inputStream, "processDefInputStream"));
        
        return null;
    }

Example #3

Source File: SimpleFlowWorkController.java From activiti-demo with Apache License 2.0

6 votes

/**
     * 查看流程定义
     * @param request
     * @param processDefId 流程定义id
     * @return
     */
    @RequestMapping(value = "/viewprocessDef.do")
    public String viewprocessDef(HttpServletRequest request,
    							 HttpServletResponse response,	
                         @RequestParam("processDefId") String processDefId) throws Exception{
    	//根据流程定义id查询流程定义
        ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().processDefinitionId(processDefId).singleResult();
        
        InputStream inputStream = repositoryService.getResourceAsStream(processDefinition.getDeploymentId(), processDefinition.getResourceName());
        
//        // 输出资源内容到相应对象
//        byte[] b = new byte[1024];
//        int len;
//        while ((len = inputStream.read(b, 0, 1024)) != -1) {
//        	response.getOutputStream().write(b, 0, len);
//        }
        
        response.getOutputStream().write(IoUtil.readInputStream(inputStream, "processDefInputStream"));
        
        return null;
    }

Example #4

Source File: ProcessDiagramCanvas.java From maven-framework-project with MIT License

6 votes

/**
 * Generates an image of what currently is drawn on the canvas.
 * 
 * Throws an {@link ActivitiException} when {@link #close()} is already
 * called.
 */
public InputStream generateImage(String imageType) {
  if (closed) {
    throw new ActivitiException("ProcessDiagramGenerator already closed");
  }

  ByteArrayOutputStream out = new ByteArrayOutputStream();
  try {
    // Try to remove white space
    minX = (minX <= 5) ? 5 : minX;
    minY = (minY <= 5) ? 5 : minY;
    BufferedImage imageToSerialize = processDiagram;
    if (minX >= 0 && minY >= 0) {
      imageToSerialize = processDiagram.getSubimage(minX - 5, minY - 5, canvasWidth - minX + 5, canvasHeight - minY + 5);
    }
    ImageIO.write(imageToSerialize, imageType, out);
  } catch (IOException e) {
    throw new ActivitiException("Error while generating process image", e);
  } finally {
    IoUtil.closeSilently(out);
  }
  return new ByteArrayInputStream(out.toByteArray());
}

Example #5

Source File: ProcessDiagramCanvas.java From maven-framework-project with MIT License

6 votes

/**
 * Generates an image of what currently is drawn on the canvas.
 * 
 * Throws an {@link ActivitiException} when {@link #close()} is already
 * called.
 */
public InputStream generateImage(String imageType) {
  if (closed) {
    throw new ActivitiException("ProcessDiagramGenerator already closed");
  }

  ByteArrayOutputStream out = new ByteArrayOutputStream();
  try {
    // Try to remove white space
    minX = (minX <= 5) ? 5 : minX;
    minY = (minY <= 5) ? 5 : minY;
    BufferedImage imageToSerialize = processDiagram;
    if (minX >= 0 && minY >= 0) {
      imageToSerialize = processDiagram.getSubimage(minX - 5, minY - 5, canvasWidth - minX + 5, canvasHeight - minY + 5);
    }
    ImageIO.write(imageToSerialize, imageType, out);
  } catch (IOException e) {
    throw new ActivitiException("Error while generating process image", e);
  } finally {
    IoUtil.closeSilently(out);
  }
  return new ByteArrayInputStream(out.toByteArray());
}

Example #6