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org.flowable.ui.modeler.service.FlowableDecisionTableService 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 com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.InputStreamReader;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Base64;
import java.util.List;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamReader;
import org.apache.commons.lang3.StringUtils;
import org.flowable.common.engine.api.FlowableException;
import org.flowable.dmn.model.DmnDefinition;
import org.flowable.dmn.xml.converter.DmnXMLConverter;
import org.flowable.editor.dmn.converter.DmnJsonConverter;
import org.flowable.idm.api.User;
import org.flowable.ui.common.model.ResultListDataRepresentation;
import org.flowable.ui.common.security.SecurityUtils;
import org.flowable.ui.common.service.exception.BadRequestException;
import org.flowable.ui.common.service.exception.InternalServerErrorException;
import org.flowable.ui.common.util.XmlUtil;
import org.flowable.ui.modeler.domain.AbstractModel;
import org.flowable.ui.modeler.domain.Model;
import org.flowable.ui.modeler.domain.ModelHistory;
import org.flowable.ui.modeler.model.DecisionTableSaveRepresentation;
import org.flowable.ui.modeler.model.ModelKeyRepresentation;
import org.flowable.ui.modeler.model.ModelRepresentation;
import org.flowable.ui.modeler.model.decisiontable.DecisionTableDefinitionRepresentation;
import org.flowable.ui.modeler.model.decisiontable.DecisionTableRepresentation;
import org.flowable.ui.modeler.repository.ModelSort;
import org.flowable.ui.modeler.serviceapi.ModelService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.multipart.MultipartFile;
/**
* @author erikwinlof
*/
@Service
@Transactional
public class FlowableDecisionTableService extends BaseFlowableModelService {
private static final Logger LOGGER = LoggerFactory.getLogger(FlowableDecisionTableService.class);
protected static final int MIN_FILTER_LENGTH = 1;
@Autowired
protected ModelService modelService;
@Autowired
protected ObjectMapper objectMapper;
protected DmnJsonConverter dmnJsonConverter = new DmnJsonConverter();
protected DmnXMLConverter dmnXmlConverter = new DmnXMLConverter();
public List getDecisionTables(String[] decisionTableIds) {
List decisionTableRepresentations = new ArrayList<>();
for (String decisionTableId : decisionTableIds) {
Model model = getModel(decisionTableId, true, false);
DecisionTableRepresentation decisionTableRepresentation = createDecisionTableRepresentation(model);
decisionTableRepresentations.add(decisionTableRepresentation);
}
return decisionTableRepresentations;
}
public ResultListDataRepresentation getDecisionTables(String filter) {
String validFilter = makeValidFilterText(filter);
List models = null;
if (validFilter != null) {
models = modelRepository.findByModelTypeAndFilter(AbstractModel.MODEL_TYPE_DECISION_TABLE, validFilter, ModelSort.NAME_ASC);
} else {
models = modelRepository.findByModelType(AbstractModel.MODEL_TYPE_DECISION_TABLE, ModelSort.NAME_ASC);
}
List reps = new ArrayList<>();
for (Model model : models) {
reps.add(new DecisionTableRepresentation(model));
}
ResultListDataRepresentation result = new ResultListDataRepresentation(reps);
result.setTotal(Long.valueOf(models.size()));
return result;
}
public void exportDecisionTable(HttpServletResponse response, String decisionTableId) {
exportDecisionTable(response, getModel(decisionTableId, true, false));
}
public void exportHistoricDecisionTable(HttpServletResponse response, String modelHistoryId) {
// Get the historic model
ModelHistory modelHistory = modelHistoryRepository.get(modelHistoryId);
// Load model and check we have read rights
getModel(modelHistory.getModelId(), true, false);
exportDecisionTable(response, modelHistory);
}
public void exportDecisionTableHistory(HttpServletResponse response, String decisionTableId) {
exportDecisionTable(response, getModel(decisionTableId, true, false));
}
protected void exportDecisionTable(HttpServletResponse response, AbstractModel decisionTableModel) {
DecisionTableRepresentation decisionTableRepresentation = getDecisionTableRepresentation(decisionTableModel);
try {
JsonNode editorJsonNode = objectMapper.readTree(decisionTableModel.getModelEditorJson());
// URLEncoder.encode will replace spaces with '+', to keep the actual name replacing '+' to '%20'
String fileName = URLEncoder.encode(decisionTableRepresentation.getName(), "UTF-8").replaceAll("\\+", "%20") + ".dmn";
response.setHeader("Content-Disposition", "attachment; filename*=UTF-8''" + fileName);
ServletOutputStream servletOutputStream = response.getOutputStream();
response.setContentType("application/xml");
DmnDefinition dmnDefinition = dmnJsonConverter.convertToDmn(editorJsonNode, decisionTableModel.getId(), decisionTableModel.getVersion(), decisionTableModel.getLastUpdated());
byte[] xmlBytes = dmnXmlConverter.convertToXML(dmnDefinition);
BufferedInputStream in = new BufferedInputStream(new ByteArrayInputStream(xmlBytes));
byte[] buffer = new byte[8096];
while (true) {
int count = in.read(buffer);
if (count == -1)
break;
servletOutputStream.write(buffer, 0, count);
}
// Flush and close stream
servletOutputStream.flush();
servletOutputStream.close();
} catch (Exception e) {
LOGGER.error("Could not export decision table model", e);
throw new InternalServerErrorException("Could not export decision table model");
}
}
public ModelRepresentation importDecisionTable(HttpServletRequest request, MultipartFile file) {
String fileName = file.getOriginalFilename();
if (fileName != null && (fileName.endsWith(".dmn") || fileName.endsWith(".xml"))) {
try {
XMLInputFactory xif = XmlUtil.createSafeXmlInputFactory();
InputStreamReader xmlIn = new InputStreamReader(file.getInputStream(), "UTF-8");
XMLStreamReader xtr = xif.createXMLStreamReader(xmlIn);
DmnDefinition dmnDefinition = dmnXmlConverter.convertToDmnModel(xtr);
if (dmnDefinition.getDecisions().size() == 0) {
throw new FlowableException("No decisions found in " + fileName);
}
ObjectNode editorJsonNode = dmnJsonConverter.convertToJson(dmnDefinition);
// remove id to avoid InvalidFormatException when deserializing
editorJsonNode.remove("id");
// set to latest model version
editorJsonNode.put("modelVersion", 2);
ModelRepresentation modelRepresentation = new ModelRepresentation();
modelRepresentation.setKey(dmnDefinition.getDecisions().get(0).getId());
modelRepresentation.setName(dmnDefinition.getName());
modelRepresentation.setDescription(dmnDefinition.getDescription());
modelRepresentation.setModelType(AbstractModel.MODEL_TYPE_DECISION_TABLE);
Model model = modelService.createModel(modelRepresentation, editorJsonNode.toString(), SecurityUtils.getCurrentUserObject());
return new ModelRepresentation(model);
} catch (Exception e) {
LOGGER.error("Could not import decision table model", e);
throw new InternalServerErrorException("Could not import decision table model");
}
} else {
throw new BadRequestException("Invalid file name, only .dmn or .xml files are supported not " + fileName);
}
}
public void migrateDecisionTables() {
List decisionTableModels = modelRepository.findByModelType(AbstractModel.MODEL_TYPE_DECISION_TABLE, ModelSort.NAME_ASC);
decisionTableModels.forEach(decisionTableModel -> {
decisionTableModel = DecisionTableModelConversionUtil.convertModelToV3(decisionTableModel);
modelRepository.save(decisionTableModel);
});
}
protected String makeValidFilterText(String filterText) {
String validFilter = null;
if (filterText != null) {
String trimmed = StringUtils.trim(filterText);
if (trimmed.length() >= MIN_FILTER_LENGTH) {
validFilter = "%" + trimmed.toLowerCase() + "%";
}
}
return validFilter;
}
public Model getDecisionTableModel(String decisionTableId) {
Model decisionTableModel = getModel(decisionTableId, true, false);
// convert to new model version
decisionTableModel = DecisionTableModelConversionUtil.convertModel(decisionTableModel);
return decisionTableModel;
}
public DecisionTableRepresentation getDecisionTable(String decisionTableId) {
return createDecisionTableRepresentation(getDecisionTableModel(decisionTableId));
}
public DecisionTableRepresentation getDecisionTableRepresentation(AbstractModel decisionTableModel) {
return createDecisionTableRepresentation(decisionTableModel);
}
public DecisionTableRepresentation getHistoricDecisionTable(String modelHistoryId) {
// Get the historic model
ModelHistory modelHistory = modelHistoryRepository.get(modelHistoryId);
// Load model and check we have read rights
getModel(modelHistory.getModelId(), true, false);
return createDecisionTableRepresentation(modelHistory);
}
protected DecisionTableRepresentation createDecisionTableRepresentation(AbstractModel model) {
DecisionTableDefinitionRepresentation decisionTableDefinitionRepresentation = null;
try {
decisionTableDefinitionRepresentation = objectMapper.readValue(model.getModelEditorJson(), DecisionTableDefinitionRepresentation.class);
} catch (Exception e) {
LOGGER.error("Error deserializing decision table", e);
throw new InternalServerErrorException("Could not deserialize decision table definition");
}
DecisionTableRepresentation result = new DecisionTableRepresentation(model);
result.setDecisionTableDefinition(decisionTableDefinitionRepresentation);
return result;
}
public DecisionTableRepresentation saveDecisionTable(String decisionTableId, DecisionTableSaveRepresentation saveRepresentation) {
User user = SecurityUtils.getCurrentUserObject();
Model model = getModel(decisionTableId, false, false);
String decisionKey = saveRepresentation.getDecisionTableRepresentation().getKey();
ModelKeyRepresentation modelKeyInfo = modelService.validateModelKey(model, model.getModelType(), decisionKey);
if (modelKeyInfo.isKeyAlreadyExists()) {
throw new BadRequestException("Provided model key already exists: " + decisionKey);
}
model.setName(saveRepresentation.getDecisionTableRepresentation().getName());
model.setKey(decisionKey);
model.setDescription(saveRepresentation.getDecisionTableRepresentation().getDescription());
saveRepresentation.getDecisionTableRepresentation().getDecisionTableDefinition().setKey(decisionKey);
String editorJson = null;
try {
editorJson = objectMapper.writeValueAsString(saveRepresentation.getDecisionTableRepresentation().getDecisionTableDefinition());
} catch (Exception e) {
LOGGER.error("Error while processing decision table json", e);
throw new InternalServerErrorException("Decision table could not be saved " + decisionTableId);
}
String filteredImageString = saveRepresentation.getDecisionTableImageBase64().replace("data:image/png;base64,", "");
byte[] imageBytes = Base64.getDecoder().decode(filteredImageString);
model = modelService.saveModel(model, editorJson, imageBytes, saveRepresentation.isNewVersion(), saveRepresentation.getComment(), user);
DecisionTableRepresentation result = new DecisionTableRepresentation(model);
result.setDecisionTableDefinition(saveRepresentation.getDecisionTableRepresentation().getDecisionTableDefinition());
return result;
}
}
