activiti-image-generator

• 目录
• • 概述
  • • 需求：
  • 设计思路
  • 实现思路分析
  • • 1.ActivitiImageException
    • 2.ProcessDiagramGenerator
    • 3.ProcessDiagramSVGGraphics2D
    • 4.ProcessDiagramDOMGroupManager
    • 5.DefaultProcessDiagramGenerator
• 参考资料和推荐阅读

Survive by day and develop by night.
talk for import biz , show your perfect code,full busy，skip hardness,make a better result,wait for change,challenge Survive.
happy for hardess to solve denpendies.

目录

概述

ProcessDiagramSVGGraphics2D是一个非常常见的需求。

需求：

设计思路

实现思路分析

1.ActivitiImageException

2.ProcessDiagramGenerator

public interface ProcessDiagramGenerator {/*** Generates a diagram of the given process definition, using the diagram interchange information of the process.* If there is no interchange information available, an ActivitiInterchangeInfoNotFoundException is thrown.* @param bpmnModel bpmn model to get diagram for* @param highLightedActivities activities to highlight* @param highLightedFlows flows to highlight* @param activityFontName override the default activity font* @param labelFontName override the default label font*/InputStream generateDiagram(BpmnModel bpmnModel,List highLightedActivities,List highLightedFlows,String activityFontName,String labelFontName,String annotationFontName);/*** Generates a diagram of the given process definition, using the diagram interchange information of the process,* or the default diagram image, if generateDefaultDiagram param is true.* @param bpmnModel bpmn model to get diagram for* @param highLightedActivities activities to highlight* @param highLightedFlows flows to highlight* @param activityFontName override the default activity font* @param labelFontName override the default label font* @param generateDefaultDiagram true if a default diagram should be generated if there is no graphic info available*/InputStream generateDiagram(BpmnModel bpmnModel,List highLightedActivities,List highLightedFlows,String activityFontName,String labelFontName,String annotationFontName,boolean generateDefaultDiagram);/*** Generates a diagram of the given process definition, using the diagram interchange information of the process,* or the default diagram image, if generateDefaultDiagram param is true.* @param bpmnModel bpmn model to get diagram for* @param highLightedActivities activities to highlight* @param highLightedFlows flows to highlight* @param currentActivities current activities to highlight* @param erroredActivities errored activities to highlight* @param activityFontName override the default activity font* @param labelFontName override the default label font* @param generateDefaultDiagram true if a default diagram should be generated if there is no graphic info available* @param defaultDiagramImageFileName override the default diagram image file name*/InputStream generateDiagram(BpmnModel bpmnModel,List highLightedActivities,List highLightedFlows,List currentActivities,List erroredActivities,String activityFontName,String labelFontName,String annotationFontName,boolean generateDefaultDiagram,String defaultDiagramImageFileName);/*** Generates a diagram of the given process definition, using the diagram interchange information of the process.* If there is no interchange information available, an ActivitiInterchangeInfoNotFoundException is thrown.* @param bpmnModel bpmn model to get diagram for* @param highLightedActivities activities to highlight* @param highLightedFlows flows to highlight*/InputStream generateDiagram(BpmnModel bpmnModel,List highLightedActivities,List highLightedFlows);/*** Generates a diagram of the given process definition, using the diagram interchange information of the process.* If there is no interchange information available, an ActivitiInterchangeInfoNotFoundException is thrown.* @param bpmnModel bpmn model to get diagram for* @param highLightedActivities activities to highlight*/InputStream generateDiagram(BpmnModel bpmnModel,List highLightedActivities);/*** Generates a diagram of the given process definition, using the diagram interchange information of the process.* If there is no interchange information available, an ActivitiInterchangeInfoNotFoundException is thrown.* @param bpmnModel bpmn model to get diagram for*/InputStream generateDiagram(BpmnModel bpmnModel,String activityFontName,String labelFontName,String annotationFontName);String getDefaultActivityFontName();String getDefaultLabelFontName();String getDefaultAnnotationFontName();String getDefaultDiagramImageFileName();
}

3.ProcessDiagramSVGGraphics2D

public class ProcessDiagramSVGGraphics2D extends SVGGraphics2D {public ProcessDiagramSVGGraphics2D(Document domFactory) {super(domFactory);this.setDOMGroupManager(new ProcessDiagramDOMGroupManager(this.getGraphicContext(),this.getDOMTreeManager()));}@Overridepublic void setRenderingHints(@SuppressWarnings("rawtypes") Map hints) {super.setRenderingHints(hints);}@Overridepublic void addRenderingHints(@SuppressWarnings("rawtypes") Map hints) {super.addRenderingHints(hints);}public void setCurrentGroupId(String id) {this.getExtendDOMGroupManager().setCurrentGroupId(id);}public ProcessDiagramDOMGroupManager getExtendDOMGroupManager() {return (ProcessDiagramDOMGroupManager) super.getDOMGroupManager();}
}

4.ProcessDiagramDOMGroupManager

public class ProcessDiagramDOMGroupManager extends DOMGroupManager {public ProcessDiagramDOMGroupManager(GraphicContext gc,DOMTreeManager domTreeManager) {super(gc,domTreeManager);}public void setCurrentGroupId(String id) {this.currentGroup.setAttribute("id",id);}
}

5.DefaultProcessDiagramGenerator

public class DefaultProcessDiagramGenerator implements ProcessDiagramGenerator {private static final String DEFAULT_ACTIVITY_FONT_NAME = "Arial";private static final String DEFAULT_LABEL_FONT_NAME = "Arial";private static final String DEFAULT_ANNOTATION_FONT_NAME = "Arial";private static final String DEFAULT_DIAGRAM_IMAGE_FILE_NAME = "/image/na.svg";protected Map, ActivityDrawInstruction> activityDrawInstructions = new HashMap, ActivityDrawInstruction>();protected Map, ArtifactDrawInstruction> artifactDrawInstructions = new HashMap, ArtifactDrawInstruction>();@Overridepublic String getDefaultActivityFontName() {return DEFAULT_ACTIVITY_FONT_NAME;}@Overridepublic String getDefaultLabelFontName() {return DEFAULT_LABEL_FONT_NAME;}@Overridepublic String getDefaultAnnotationFontName() {return DEFAULT_ANNOTATION_FONT_NAME;}@Overridepublic String getDefaultDiagramImageFileName() {return DEFAULT_DIAGRAM_IMAGE_FILE_NAME;}// The instructions on how to draw a certain construct is// created statically and stored in a map for performance.public DefaultProcessDiagramGenerator() {// start eventactivityDrawInstructions.put(StartEvent.class,new ActivityDrawInstruction() {@Overridepublic void draw(DefaultProcessDiagramCanvas processDiagramCanvas,BpmnModel bpmnModel,FlowNode flowNode) {GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId());StartEvent startEvent = (StartEvent) flowNode;if (startEvent.getEventDefinitions() != null && !startEvent.getEventDefinitions().isEmpty()) {EventDefinition eventDefinition = startEvent.getEventDefinitions().get(0);if (eventDefinition instanceof TimerEventDefinition) {processDiagramCanvas.drawTimerStartEvent(flowNode.getId(),graphicInfo);} else if (eventDefinition instanceof ErrorEventDefinition) {processDiagramCanvas.drawErrorStartEvent(flowNode.getId(),graphicInfo);} else if (eventDefinition instanceof SignalEventDefinition) {processDiagramCanvas.drawSignalStartEvent(flowNode.getId(),graphicInfo);} else if (eventDefinition instanceof MessageEventDefinition) {processDiagramCanvas.drawMessageStartEvent(flowNode.getId(),graphicInfo);} else {processDiagramCanvas.drawNoneStartEvent(flowNode.getId(),graphicInfo);}} else {processDiagramCanvas.drawNoneStartEvent(flowNode.getId(),graphicInfo);}}});// signal catchactivityDrawInstructions.put(IntermediateCatchEvent.class,new ActivityDrawInstruction() {@Overridepublic void draw(DefaultProcessDiagramCanvas processDiagramCanvas,BpmnModel bpmnModel,FlowNode flowNode) {GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId());IntermediateCatchEvent intermediateCatchEvent = (IntermediateCatchEvent) flowNode;if (intermediateCatchEvent.getEventDefinitions() != null && !intermediateCatchEvent.getEventDefinitions().isEmpty()) {if (intermediateCatchEvent.getEventDefinitions().get(0) instanceof SignalEventDefinition) {processDiagramCanvas.drawCatchingSignalEvent(flowNode.getId(),flowNode.getName(),graphicInfo,true);} else if (intermediateCatchEvent.getEventDefinitions().get(0) instanceof TimerEventDefinition) {processDiagramCanvas.drawCatchingTimerEvent(flowNode.getId(),flowNode.getName(),graphicInfo,true);} else if (intermediateCatchEvent.getEventDefinitions().get(0) instanceof MessageEventDefinition) {processDiagramCanvas.drawCatchingMessageEvent(flowNode.getId(),flowNode.getName(),graphicInfo,true);}}}});// signal throwactivityDrawInstructions.put(ThrowEvent.class,new ActivityDrawInstruction() {@Overridepublic void draw(DefaultProcessDiagramCanvas processDiagramCanvas,BpmnModel bpmnModel,FlowNode flowNode) {GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId());ThrowEvent throwEvent = (ThrowEvent) flowNode;if (throwEvent.getEventDefinitions() != null && !throwEvent.getEventDefinitions().isEmpty()) {if (throwEvent.getEventDefinitions().get(0) instanceof SignalEventDefinition) {processDiagramCanvas.drawThrowingSignalEvent(flowNode.getId(),graphicInfo);} else if (throwEvent.getEventDefinitions().get(0) instanceof CompensateEventDefinition) {processDiagramCanvas.drawThrowingCompensateEvent(flowNode.getId(),graphicInfo);} else {processDiagramCanvas.drawThrowingNoneEvent(flowNode.getId(),graphicInfo);}} else {processDiagramCanvas.drawThrowingNoneEvent(flowNode.getId(),graphicInfo);}}});// end eventactivityDrawInstructions.put(EndEvent.class,new ActivityDrawInstruction() {@Overridepublic void draw(DefaultProcessDiagramCanvas processDiagramCanvas,BpmnModel bpmnModel,FlowNode flowNode) {GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId());EndEvent endEvent = (EndEvent) flowNode;if (endEvent.getEventDefinitions() != null && !endEvent.getEventDefinitions().isEmpty()) {if (endEvent.getEventDefinitions().get(0) instanceof ErrorEventDefinition) {processDiagramCanvas.drawErrorEndEvent(flowNode.getId(),flowNode.getName(),graphicInfo);} else {processDiagramCanvas.drawNoneEndEvent(flowNode.getId(),flowNode.getName(),graphicInfo);}} else {processDiagramCanvas.drawNoneEndEvent(flowNode.getId(),flowNode.getName(),graphicInfo);}}});// taskactivityDrawInstructions.put(Task.class,new ActivityDrawInstruction() {@Overridepublic void draw(DefaultProcessDiagramCanvas processDiagramCanvas,BpmnModel bpmnModel,FlowNode flowNode) {GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId());processDiagramCanvas.drawTask(flowNode.getId(),flowNode.getName(),graphicInfo);}});// user taskactivityDrawInstructions.put(UserTask.class,new ActivityDrawInstruction() {@Overridepublic void draw(DefaultProcessDiagramCanvas processDiagramCanvas,BpmnModel bpmnModel,FlowNode flowNode) {GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId());processDiagramCanvas.drawUserTask(flowNode.getId(),flowNode.getName(),graphicInfo);}});// script taskactivityDrawInstructions.put(ScriptTask.class,new ActivityDrawInstruction() {@Overridepublic void draw(DefaultProcessDiagramCanvas processDiagramCanvas,BpmnModel bpmnModel,FlowNode flowNode) {GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId());processDiagramCanvas.drawScriptTask(flowNode.getId(),flowNode.getName(),graphicInfo);}});// service taskactivityDrawInstructions.put(ServiceTask.class,new ActivityDrawInstruction() {@Overridepublic void draw(DefaultProcessDiagramCanvas processDiagramCanvas,BpmnModel bpmnModel,FlowNode flowNode) {GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId());ServiceTask serviceTask = (ServiceTask) flowNode;processDiagramCanvas.drawServiceTask(flowNode.getId(),serviceTask.getName(),graphicInfo);}});// receive taskactivityDrawInstructions.put(ReceiveTask.class,new ActivityDrawInstruction() {@Overridepublic void draw(DefaultProcessDiagramCanvas processDiagramCanvas,BpmnModel bpmnModel,FlowNode flowNode) {GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId());processDiagramCanvas.drawReceiveTask(flowNode.getId(),flowNode.getName(),graphicInfo);}});// send taskactivityDrawInstructions.put(SendTask.class,new ActivityDrawInstruction() {@Overridepublic void draw(DefaultProcessDiagramCanvas processDiagramCanvas,BpmnModel bpmnModel,FlowNode flowNode) {GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId());processDiagramCanvas.drawSendTask(flowNode.getId(),flowNode.getName(),graphicInfo);}});// manual taskactivityDrawInstructions.put(ManualTask.class,new ActivityDrawInstruction() {@Overridepublic void draw(DefaultProcessDiagramCanvas processDiagramCanvas,BpmnModel bpmnModel,FlowNode flowNode) {GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId());processDiagramCanvas.drawManualTask(flowNode.getId(),flowNode.getName(),graphicInfo);}});// businessRuleTask taskactivityDrawInstructions.put(BusinessRuleTask.class,new ActivityDrawInstruction() {@Overridepublic void draw(DefaultProcessDiagramCanvas processDiagramCanvas,BpmnModel bpmnModel,FlowNode flowNode) {GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId());processDiagramCanvas.drawBusinessRuleTask(flowNode.getId(),flowNode.getName(),graphicInfo);}});// exclusive gatewayactivityDrawInstructions.put(ExclusiveGateway.class,new ActivityDrawInstruction() {@Overridepublic void draw(DefaultProcessDiagramCanvas processDiagramCanvas,BpmnModel bpmnModel,FlowNode flowNode) {GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId());processDiagramCanvas.drawExclusiveGateway(flowNode.getId(),graphicInfo);}});// inclusive gatewayactivityDrawInstructions.put(InclusiveGateway.class,new ActivityDrawInstruction() {@Overridepublic void draw(DefaultProcessDiagramCanvas processDiagramCanvas,BpmnModel bpmnModel,FlowNode flowNode) {GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId());processDiagramCanvas.drawInclusiveGateway(flowNode.getId(),graphicInfo);}});// parallel gatewayactivityDrawInstructions.put(ParallelGateway.class,new ActivityDrawInstruction() {@Overridepublic void draw(DefaultProcessDiagramCanvas processDiagramCanvas,BpmnModel bpmnModel,FlowNode flowNode) {GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId());processDiagramCanvas.drawParallelGateway(flowNode.getId(),graphicInfo);}});

参考资料和推荐阅读

[1]. www.acitivte.org

欢迎阅读，各位老铁，如果对你有帮助，点个赞加个关注呗！~