Export error definitions in BPMN XML

modules/flowable-bpmn-converter/src/main/java/org/flowable/bpmn/converter/BpmnXMLConverter.java

@@ -46,6 +46,7 @@
 import org.flowable.bpmn.converter.export.CollaborationExport;
 import org.flowable.bpmn.converter.export.DataStoreExport;
 import org.flowable.bpmn.converter.export.DefinitionsRootExport;
+import org.flowable.bpmn.converter.export.ErrorDefinitionExport;
 import org.flowable.bpmn.converter.export.EscalationDefinitionExport;
 import org.flowable.bpmn.converter.export.FlowableListenerExport;
 import org.flowable.bpmn.converter.export.MultiInstanceExport;
@@ -567,6 +568,7 @@ public byte[] convertToXML(BpmnModel model, String encoding) {
             CollaborationExport.writePools(model, xtw);
             DataStoreExport.writeDataStores(model, xtw);
             SignalAndMessageDefinitionExport.writeSignalsAndMessages(model, xtw);
+            ErrorDefinitionExport.writeErrors(model, xtw);
             EscalationDefinitionExport.writeEscalations(model, xtw);
 
             for (Process process : model.getProcesses()) {

modules/flowable-bpmn-converter/src/main/java/org/flowable/bpmn/converter/export/ErrorDefinitionExport.java

@@ -0,0 +1,36 @@
+/* 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.bpmn.converter.export;
+
+import java.util.Map;
+
+import javax.xml.stream.XMLStreamWriter;
+
+import org.apache.commons.lang3.StringUtils;
+import org.flowable.bpmn.constants.BpmnXMLConstants;
+import org.flowable.bpmn.model.BpmnModel;
+
+public class ErrorDefinitionExport implements BpmnXMLConstants {
+
+    public static void writeErrors(BpmnModel model, XMLStreamWriter xtw) throws Exception {
+
+        for (Map.Entry<String, String> error : model.getErrors().entrySet()) {
+            xtw.writeStartElement(ELEMENT_ERROR);
+            xtw.writeAttribute(ATTRIBUTE_ID, error.getKey());
+            if (StringUtils.isNotEmpty(error.getValue())) {
+                xtw.writeAttribute(ATTRIBUTE_ERROR_CODE, error.getValue());
+            }
+            xtw.writeEndElement();
+        }
+    }
+}

modules/flowable-bpmn-converter/src/test/java/org/flowable/editor/language/xml/BoundaryErrorEventConverterTest.java

@@ -13,6 +13,7 @@
 package org.flowable.editor.language.xml;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.entry;
 import static org.assertj.core.api.Assertions.tuple;
 
 import org.flowable.bpmn.model.BoundaryEvent;
@@ -28,6 +29,8 @@ class BoundaryErrorEventConverterTest {
 
     @BpmnXmlConverterTest("boundaryErrorEventWithInParameters.bpmn")
     void validateErrorBoundaryWithInParameters(BpmnModel model) {
+        assertThat(model.getErrors()).containsExactly(entry("errorOne", "errorCodeOne"));
+
         FlowElement flowElement = model.getFlowElement("theErrorBoundary");
         assertThat(flowElement).isInstanceOfSatisfying(BoundaryEvent.class, event -> {
             assertThat(event.getInParameters())

modules/flowable-bpmn-converter/src/test/resources/boundaryErrorEventWithInParameters.bpmn

@@ -4,7 +4,7 @@
              id="_1384552647085" name="" targetNamespace="http://sourceforge.net/bpmn/definitions/_1384552647085"
              typeLanguage="http://www.w3.org/2001/XMLSchema"
              xsi:schemaLocation="http://www.omg.org/spec/BPMN/20100524/MODEL http://bpmn.sourceforge.net/schemas/BPMN20.xsd">
-    <error id="errorOne" name="Error One" errorCode="errorOne"/>
+    <error id="errorOne" name="Error One" errorCode="errorCodeOne"/>
     <process id="testProcess" isExecutable="true" name="Test Process">
         <startEvent id="theStart"/>
         <sequenceFlow id="flow1" sourceRef="theStart" targetRef="theTask"/>