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activiti-image-generator
activiti-image-generator
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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<String> highLightedActivities, List<String> 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<String> highLightedActivities, List<String> 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<String> highLightedActivities, List<String> highLightedFlows, List<String> currentActivities, List<String> 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<String> highLightedActivities, List<String> 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<String> 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(); }- 1
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3.ProcessDiagramSVGGraphics2D
public class ProcessDiagramSVGGraphics2D extends SVGGraphics2D { public ProcessDiagramSVGGraphics2D(Document domFactory) { super(domFactory); this.setDOMGroupManager(new ProcessDiagramDOMGroupManager(this.getGraphicContext(), this.getDOMTreeManager())); } @Override public void setRenderingHints(@SuppressWarnings("rawtypes") Map hints) { super.setRenderingHints(hints); } @Override public 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(); } }- 1
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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); } }- 1
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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<Class<? extends BaseElement>, ActivityDrawInstruction> activityDrawInstructions = new HashMap<Class<? extends BaseElement>, ActivityDrawInstruction>(); protected Map<Class<? extends BaseElement>, ArtifactDrawInstruction> artifactDrawInstructions = new HashMap<Class<? extends BaseElement>, ArtifactDrawInstruction>(); @Override public String getDefaultActivityFontName() { return DEFAULT_ACTIVITY_FONT_NAME; } @Override public String getDefaultLabelFontName() { return DEFAULT_LABEL_FONT_NAME; } @Override public String getDefaultAnnotationFontName() { return DEFAULT_ANNOTATION_FONT_NAME; } @Override public 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 event activityDrawInstructions.put(StartEvent.class, new ActivityDrawInstruction() { @Override public 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 catch activityDrawInstructions.put(IntermediateCatchEvent.class, new ActivityDrawInstruction() { @Override public 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 throw activityDrawInstructions.put(ThrowEvent.class, new ActivityDrawInstruction() { @Override public 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 event activityDrawInstructions.put(EndEvent.class, new ActivityDrawInstruction() { @Override public 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); } } }); // task activityDrawInstructions.put(Task.class, new ActivityDrawInstruction() { @Override public void draw(DefaultProcessDiagramCanvas processDiagramCanvas, BpmnModel bpmnModel, FlowNode flowNode) { GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId()); processDiagramCanvas.drawTask(flowNode.getId(), flowNode.getName(), graphicInfo); } }); // user task activityDrawInstructions.put(UserTask.class, new ActivityDrawInstruction() { @Override public void draw(DefaultProcessDiagramCanvas processDiagramCanvas, BpmnModel bpmnModel, FlowNode flowNode) { GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId()); processDiagramCanvas.drawUserTask(flowNode.getId(), flowNode.getName(), graphicInfo); } }); // script task activityDrawInstructions.put(ScriptTask.class, new ActivityDrawInstruction() { @Override public void draw(DefaultProcessDiagramCanvas processDiagramCanvas, BpmnModel bpmnModel, FlowNode flowNode) { GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId()); processDiagramCanvas.drawScriptTask(flowNode.getId(), flowNode.getName(), graphicInfo); } }); // service task activityDrawInstructions.put(ServiceTask.class, new ActivityDrawInstruction() { @Override public 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 task activityDrawInstructions.put(ReceiveTask.class, new ActivityDrawInstruction() { @Override public void draw(DefaultProcessDiagramCanvas processDiagramCanvas, BpmnModel bpmnModel, FlowNode flowNode) { GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId()); processDiagramCanvas.drawReceiveTask(flowNode.getId(), flowNode.getName(), graphicInfo); } }); // send task activityDrawInstructions.put(SendTask.class, new ActivityDrawInstruction() { @Override public void draw(DefaultProcessDiagramCanvas processDiagramCanvas, BpmnModel bpmnModel, FlowNode flowNode) { GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId()); processDiagramCanvas.drawSendTask(flowNode.getId(), flowNode.getName(), graphicInfo); } }); // manual task activityDrawInstructions.put(ManualTask.class, new ActivityDrawInstruction() { @Override public void draw(DefaultProcessDiagramCanvas processDiagramCanvas, BpmnModel bpmnModel, FlowNode flowNode) { GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId()); processDiagramCanvas.drawManualTask(flowNode.getId(), flowNode.getName(), graphicInfo); } }); // businessRuleTask task activityDrawInstructions.put(BusinessRuleTask.class, new ActivityDrawInstruction() { @Override public void draw(DefaultProcessDiagramCanvas processDiagramCanvas, BpmnModel bpmnModel, FlowNode flowNode) { GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId()); processDiagramCanvas.drawBusinessRuleTask(flowNode.getId(), flowNode.getName(), graphicInfo); } }); // exclusive gateway activityDrawInstructions.put(ExclusiveGateway.class, new ActivityDrawInstruction() { @Override public void draw(DefaultProcessDiagramCanvas processDiagramCanvas, BpmnModel bpmnModel, FlowNode flowNode) { GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId()); processDiagramCanvas.drawExclusiveGateway(flowNode.getId(), graphicInfo); } }); // inclusive gateway activityDrawInstructions.put(InclusiveGateway.class, new ActivityDrawInstruction() { @Override public void draw(DefaultProcessDiagramCanvas processDiagramCanvas, BpmnModel bpmnModel, FlowNode flowNode) { GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId()); processDiagramCanvas.drawInclusiveGateway(flowNode.getId(), graphicInfo); } }); // parallel gateway activityDrawInstructions.put(ParallelGateway.class, new ActivityDrawInstruction() { @Override public void draw(DefaultProcessDiagramCanvas processDiagramCanvas, BpmnModel bpmnModel, FlowNode flowNode) { GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowNode.getId()); processDiagramCanvas.drawParallelGateway(flowNode.getId(), graphicInfo); } });- 1
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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！~
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- 原文地址：https://blog.csdn.net/xiamaocheng/article/details/127931733
