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org.flowable.ui.modeler.service.ModelImageService Maven / Gradle / Ivy
/* 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.flowable.ui.modeler.service;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.flowable.bpmn.model.Artifact;
import org.flowable.bpmn.model.Association;
import org.flowable.bpmn.model.BpmnModel;
import org.flowable.bpmn.model.DataObject;
import org.flowable.bpmn.model.FlowElement;
import org.flowable.bpmn.model.GraphicInfo;
import org.flowable.bpmn.model.Lane;
import org.flowable.bpmn.model.Pool;
import org.flowable.bpmn.model.Process;
import org.flowable.bpmn.model.SequenceFlow;
import org.flowable.bpmn.model.SubProcess;
import org.flowable.cmmn.editor.json.converter.CmmnJsonConverter;
import org.flowable.cmmn.model.Case;
import org.flowable.cmmn.model.CmmnModel;
import org.flowable.cmmn.model.Criterion;
import org.flowable.cmmn.model.PlanItem;
import org.flowable.cmmn.model.Stage;
import org.flowable.editor.language.json.converter.BpmnJsonConverter;
import org.flowable.ui.modeler.domain.Model;
import org.flowable.ui.modeler.util.ImageGenerator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.fasterxml.jackson.databind.node.ObjectNode;
@Service
@Transactional
public class ModelImageService {
private static final Logger LOGGER = LoggerFactory.getLogger(ModelImageService.class);
private static float THUMBNAIL_WIDTH = 300f;
protected BpmnJsonConverter bpmnJsonConverter = new BpmnJsonConverter();
protected CmmnJsonConverter cmmnJsonConverter = new CmmnJsonConverter();
public byte[] generateThumbnailImage(Model model, ObjectNode editorJsonNode) {
try {
BpmnModel bpmnModel = bpmnJsonConverter.convertToBpmnModel(editorJsonNode);
double scaleFactor = 1.0;
GraphicInfo diagramInfo = calculateDiagramSize(bpmnModel);
if (diagramInfo.getWidth() > THUMBNAIL_WIDTH) {
scaleFactor = diagramInfo.getWidth() / THUMBNAIL_WIDTH;
scaleDiagram(bpmnModel, scaleFactor);
}
BufferedImage modelImage = ImageGenerator.createImage(bpmnModel, scaleFactor);
if (modelImage != null) {
return ImageGenerator.createByteArrayForImage(modelImage, "png");
}
} catch (Exception e) {
LOGGER.error("Error creating thumbnail image {}", model.getId(), e);
}
return null;
}
public byte[] generateCmmnThumbnailImage(Model model, ObjectNode editorJsonNode) {
try {
CmmnModel cmmnModel = cmmnJsonConverter.convertToCmmnModel(editorJsonNode);
double scaleFactor = 1.0;
GraphicInfo diagramInfo = calculateDiagramSize(cmmnModel);
if (diagramInfo.getWidth() > THUMBNAIL_WIDTH) {
scaleFactor = diagramInfo.getWidth() / THUMBNAIL_WIDTH;
scaleDiagram(cmmnModel, scaleFactor);
}
BufferedImage modelImage = ImageGenerator.createCmmnImage(cmmnModel, scaleFactor);
if (modelImage != null) {
return ImageGenerator.createByteArrayForImage(modelImage, "png");
}
} catch (Exception e) {
LOGGER.error("Error creating thumbnail cmmn image {}", model.getId(), e);
}
return null;
}
protected GraphicInfo calculateDiagramSize(BpmnModel bpmnModel) {
GraphicInfo diagramInfo = new GraphicInfo();
for (Pool pool : bpmnModel.getPools()) {
GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(pool.getId());
double elementMaxX = graphicInfo.getX() + graphicInfo.getWidth();
double elementMaxY = graphicInfo.getY() + graphicInfo.getHeight();
if (elementMaxX > diagramInfo.getWidth()) {
diagramInfo.setWidth(elementMaxX);
}
if (elementMaxY > diagramInfo.getHeight()) {
diagramInfo.setHeight(elementMaxY);
}
}
for (Process process : bpmnModel.getProcesses()) {
calculateWidthForFlowElements(process.getFlowElements(), bpmnModel, diagramInfo);
calculateWidthForArtifacts(process.getArtifacts(), bpmnModel, diagramInfo);
}
return diagramInfo;
}
protected GraphicInfo calculateDiagramSize(CmmnModel cmmnModel) {
GraphicInfo diagramInfo = new GraphicInfo();
for (Case caseModel : cmmnModel.getCases()) {
Stage stage = caseModel.getPlanModel();
org.flowable.cmmn.model.GraphicInfo graphicInfo = cmmnModel.getGraphicInfo(stage.getId());
double elementMaxX = graphicInfo.getX() + graphicInfo.getWidth();
double elementMaxY = graphicInfo.getY() + graphicInfo.getHeight();
if (elementMaxX > diagramInfo.getWidth()) {
diagramInfo.setWidth(elementMaxX);
}
if (elementMaxY > diagramInfo.getHeight()) {
diagramInfo.setHeight(elementMaxY);
}
}
return diagramInfo;
}
protected void scaleDiagram(BpmnModel bpmnModel, double scaleFactor) {
for (Pool pool : bpmnModel.getPools()) {
GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(pool.getId());
scaleGraphicInfo(graphicInfo, scaleFactor);
}
for (Process process : bpmnModel.getProcesses()) {
scaleFlowElements(process.getFlowElements(), bpmnModel, scaleFactor);
scaleArtifacts(process.getArtifacts(), bpmnModel, scaleFactor);
for (Lane lane : process.getLanes()) {
scaleGraphicInfo(bpmnModel.getGraphicInfo(lane.getId()), scaleFactor);
}
}
}
protected void scaleDiagram(CmmnModel cmmnModel, double scaleFactor) {
for (Case caseModel : cmmnModel.getCases()) {
org.flowable.cmmn.model.GraphicInfo graphicInfo = cmmnModel.getGraphicInfo(caseModel.getPlanModel().getId());
scaleCmmnGraphicInfo(graphicInfo, scaleFactor);
for (Criterion criterion : caseModel.getPlanModel().getExitCriteria()) {
org.flowable.cmmn.model.GraphicInfo criterionGraphicInfo = cmmnModel.getGraphicInfo(criterion.getId());
scaleCmmnGraphicInfo(criterionGraphicInfo, scaleFactor);
}
scalePlanItems(caseModel.getPlanModel().getPlanItems(), cmmnModel, scaleFactor);
}
scaleAssociations(cmmnModel.getAssociations(), cmmnModel, scaleFactor);
}
protected void calculateWidthForFlowElements(Collection elementList, BpmnModel bpmnModel, GraphicInfo diagramInfo) {
for (FlowElement flowElement : elementList) {
List graphicInfoList = new ArrayList<>();
if (flowElement instanceof SequenceFlow) {
List flowGraphics = bpmnModel.getFlowLocationGraphicInfo(flowElement.getId());
if (flowGraphics != null && flowGraphics.size() > 0) {
graphicInfoList.addAll(flowGraphics);
}
} else {
GraphicInfo graphicInfo = bpmnModel.getGraphicInfo(flowElement.getId());
if (graphicInfo != null) {
graphicInfoList.add(graphicInfo);
}
}
processGraphicInfoList(graphicInfoList, diagramInfo);
}
}
protected void calculateWidthForArtifacts(Collection artifactList, BpmnModel bpmnModel, GraphicInfo diagramInfo) {
for (Artifact artifact : artifactList) {
List graphicInfoList = new ArrayList<>();
if (artifact instanceof Association) {
graphicInfoList.addAll(bpmnModel.getFlowLocationGraphicInfo(artifact.getId()));
} else {
graphicInfoList.add(bpmnModel.getGraphicInfo(artifact.getId()));
}
processGraphicInfoList(graphicInfoList, diagramInfo);
}
}
protected void processGraphicInfoList(List graphicInfoList, GraphicInfo diagramInfo) {
for (GraphicInfo graphicInfo : graphicInfoList) {
double elementMaxX = graphicInfo.getX() + graphicInfo.getWidth();
double elementMaxY = graphicInfo.getY() + graphicInfo.getHeight();
if (elementMaxX > diagramInfo.getWidth()) {
diagramInfo.setWidth(elementMaxX);
}
if (elementMaxY > diagramInfo.getHeight()) {
diagramInfo.setHeight(elementMaxY);
}
}
}
protected void scaleFlowElements(Collection elementList, BpmnModel bpmnModel, double scaleFactor) {
for (FlowElement flowElement : elementList) {
List graphicInfoList = new ArrayList<>();
if (flowElement instanceof SequenceFlow) {
List flowList = bpmnModel.getFlowLocationGraphicInfo(flowElement.getId());
if (flowList != null) {
graphicInfoList.addAll(flowList);
}
// no graphic info for Data Objects
} else if (!DataObject.class.isInstance(flowElement)) {
graphicInfoList.add(bpmnModel.getGraphicInfo(flowElement.getId()));
}
scaleGraphicInfoList(graphicInfoList, scaleFactor);
if (flowElement instanceof SubProcess) {
SubProcess subProcess = (SubProcess) flowElement;
scaleFlowElements(subProcess.getFlowElements(), bpmnModel, scaleFactor);
}
}
}
protected void scaleArtifacts(Collection artifactList, BpmnModel bpmnModel, double scaleFactor) {
for (Artifact artifact : artifactList) {
List graphicInfoList = new ArrayList<>();
if (artifact instanceof Association) {
List flowList = bpmnModel.getFlowLocationGraphicInfo(artifact.getId());
if (flowList != null) {
graphicInfoList.addAll(flowList);
}
} else {
graphicInfoList.add(bpmnModel.getGraphicInfo(artifact.getId()));
}
scaleGraphicInfoList(graphicInfoList, scaleFactor);
}
}
protected void scalePlanItems(Collection itemList, CmmnModel cmmnModel, double scaleFactor) {
for (PlanItem planItem : itemList) {
org.flowable.cmmn.model.GraphicInfo graphicInfo = cmmnModel.getGraphicInfo(planItem.getId());
scaleCmmnGraphicInfo(graphicInfo, scaleFactor);
if (planItem.getPlanItemDefinition() instanceof Stage) {
Stage stage = (Stage) planItem.getPlanItemDefinition();
scalePlanItems(stage.getPlanItems(), cmmnModel, scaleFactor);
}
for (Criterion criterion : planItem.getEntryCriteria()) {
org.flowable.cmmn.model.GraphicInfo criterionGraphicInfo = cmmnModel.getGraphicInfo(criterion.getId());
scaleCmmnGraphicInfo(criterionGraphicInfo, scaleFactor);
}
for (Criterion criterion : planItem.getExitCriteria()) {
org.flowable.cmmn.model.GraphicInfo criterionGraphicInfo = cmmnModel.getGraphicInfo(criterion.getId());
scaleCmmnGraphicInfo(criterionGraphicInfo, scaleFactor);
}
}
}
protected void scaleAssociations(List associationList, CmmnModel cmmnModel, double scaleFactor) {
for (org.flowable.cmmn.model.Association association : associationList) {
List flowList = cmmnModel.getFlowLocationGraphicInfo(association.getId());
scaleCmmnGraphicInfoList(flowList, scaleFactor);
}
}
protected void scaleGraphicInfoList(List graphicInfoList, double scaleFactor) {
for (GraphicInfo graphicInfo : graphicInfoList) {
scaleGraphicInfo(graphicInfo, scaleFactor);
}
}
protected void scaleGraphicInfo(GraphicInfo graphicInfo, double scaleFactor) {
graphicInfo.setX(graphicInfo.getX() / scaleFactor);
graphicInfo.setY(graphicInfo.getY() / scaleFactor);
graphicInfo.setWidth(graphicInfo.getWidth() / scaleFactor);
graphicInfo.setHeight(graphicInfo.getHeight() / scaleFactor);
}
protected void scaleCmmnGraphicInfoList(List graphicInfoList, double scaleFactor) {
if (graphicInfoList != null) {
for (org.flowable.cmmn.model.GraphicInfo graphicInfo : graphicInfoList) {
scaleCmmnGraphicInfo(graphicInfo, scaleFactor);
}
}
}
protected void scaleCmmnGraphicInfo(org.flowable.cmmn.model.GraphicInfo graphicInfo, double scaleFactor) {
graphicInfo.setX(graphicInfo.getX() / scaleFactor);
graphicInfo.setY(graphicInfo.getY() / scaleFactor);
graphicInfo.setWidth(graphicInfo.getWidth() / scaleFactor);
graphicInfo.setHeight(graphicInfo.getHeight() / scaleFactor);
}
}
