Fix NPE when getting model config lists (#4017)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

packages/server/src/main/java/software/uncharted/terarium/hmiserver/models/dataservice/model/Model.java

@@ -99,7 +99,9 @@ public Model clone() {
  @JsonIgnore
  @TSIgnore
  public List<Observable> getObservables() {
- if (this.getSemantics() == null || this.getSemantics().getOde() == null) {
+ if (this.getSemantics() == null
+ || this.getSemantics().getOde() == null
+ || this.getSemantics().getOde().getObservables() == null) {
  return new ArrayList<Observable>();
  }
  return this.getSemantics().getOde().getObservables();
@@ -111,12 +113,13 @@ public List<ModelParameter> getParameters() {
  final ObjectMapper objectMapper = new ObjectMapper();
  if (this.isRegnet()) {
  return objectMapper.convertValue(this.getModel().get("parameters"), new TypeReference<>() {});
- } else {
- if (this.getSemantics() == null || this.getSemantics().getOde() == null) {
- return new ArrayList<ModelParameter>();
- }
- return this.getSemantics().getOde().getParameters();
  }
+ if (this.getSemantics() == null
+ || this.getSemantics().getOde() == null
+ || this.getSemantics().getOde().getParameters() == null) {
+ return new ArrayList<ModelParameter>();
+ }
+ return this.getSemantics().getOde().getParameters();
  }
 
  @JsonIgnore
@@ -126,7 +129,9 @@ public List<Initial> getInitials() {
  if (this.isRegnet()) {
  return objectMapper.convertValue(this.getModel().get("initials"), new TypeReference<>() {});
  } else {
- if (this.getSemantics() == null || this.getSemantics().getOde() == null) {
+ if (this.getSemantics() == null
+ || this.getSemantics().getOde() == null
+ || this.getSemantics().getOde().getInitials() == null) {
  return new ArrayList<Initial>();
  }
  return this.getSemantics().getOde().getInitials();