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Multivalue

Multivalue is a component that allows to select multiple values from Popup List of entities

Tip

For this field type we need to talk about number of rows in popup and number of selected rows.Number of rows in popup: Feel free to use this field type for large entities of any size (only one page is loaded in memory).Number of selected rows: should be <1000-10000, because selected rows are stored in memory

Basics

Live Sample · GitHub

How does it look?

img_list.png

img_info.png

img_form.png

How to add?

Example

  • Step 1. AssocListPopup

    In the following example, MyEntity entity has a ManyToMany reference to the MyEntityMultivalue entity. Link is made by id in table MyEntity_MyEntityMultivalue, e.g. MyEntity.id = MyEntity_MyEntityMultivalue.MyEntityId, MyEntityMultivalue.id = MyEntity_MyEntityMultivalue.MyEntityMultivalueId.

    • Step 1.1 Create link table for ManyToMany (MyEntity_MyEntityMultivalue).
    • Step 1.2 Create Entity MyEntityMultivalue.
    • Step 1.3 Create DTO MyEntityMultivalueDTO.

    • Step 1.4 Add String additional field to corresponding BaseEntity.

      @Entity
@Getter
@Setter
@NoArgsConstructor
public class MyEntityMultivalue extends BaseEntity {

    @Column
    private String customField;

}

    • Step 1.5 Add String additional field to corresponding DataResponseDTO.

      @Getter
@Setter
@NoArgsConstructor
public class MyEntityMultivalueDTO extends DataResponseDTO {


    @SearchParameter(name = "customField")
    private String customField;

    public MyEntityMultivalueDTO(MyEntityMultivalue entity) {
        this.id = entity.getId().toString();
        this.customField = entity.getCustomField();
    }

}

    • Step 1.6.AssocListPopup Create AssocListPopup to .widget.json. 

      {
  "title": "myEntityAssocListPopup title",
  "name": "myEntityAssocListPopup",
  "type": "AssocListPopup",
  "bc": "myEntityAssocListPopup",
  "fields": [
    {
      "title": "Custom Field",
      "key": "customField",
      "type": "input"
    },
    {
      "title": "id",
      "key": "id",
      "type": "text"
    }
  ]
}

    • Step2 Add List field to corresponding BaseEntity.

      @Entity
@Getter
@Setter
@NoArgsConstructor
public class MyEntity extends BaseEntity {

    @JoinTable(name = "MyEntity_MyEntity",
            joinColumns = @JoinColumn(name = "MyEntity_id"),
            inverseJoinColumns = @JoinColumn(name = "MyEntity_id")
    )
    @ManyToMany(cascade = {CascadeType.PERSIST, CascadeType.MERGE})
    private List<MyEntityMultivalue> customFieldList = new ArrayList<>();

    @Column
    private String customFieldAdditional;

}

    • Step 3 Add MultivalueField field to corresponding DataResponseDTO.

      @Getter
@Setter
@NoArgsConstructor
public class MyExampleDTO extends DataResponseDTO {

    @SearchParameter(name = "customFieldList.id", provider = LongValueProvider.class)
    private MultivalueField customField;

    private String customFieldCalc;

    @SearchParameter(name = "customFieldAdditional")
    private String customFieldAdditional;

    public MyExampleDTO(MyEntity entity) {
        this.id = entity.getId().toString();
        this.customField = entity.getCustomFieldList().stream().collect(MultivalueField.toMultivalueField(
                e -> String.valueOf(e.getId()),
                MyEntityMultivalue::getCustomField
        ));

        this.customFieldCalc = StringUtils.abbreviate(entity.getCustomFieldList().stream().map(MyEntityMultivalue::getCustomField
        ).collect(Collectors.joining(",")), 12);
        this.customFieldAdditional = entity.getCustomFieldAdditional();
    }

}

    • Step4 Add bc MyEntityMultivalueAssocListPopup to corresponding EnumBcIdentifier.

          myExampleBc(MyExampleService.class),
    myEntityAssocListPopup(myExampleBc, MyEntityMultivalueService.class);

    • Step5 Add AssocListPopup widget to view.

    Step 6 Add popupBcName and assocValueKey to .widget.json.

    popupBcName - name bc Step 1.6.AssocListPopup

    assocValueKey - field for opening AssocListPopup

    displayedKey - text field usually containing contcatenated values from linked rows on List widget

    {
  "name": "MyExampleList",
  "title": "List title",
  "type": "List",
  "bc": "myExampleBc",
  "fields": [
    {
      "title": "Custom Field",
      "key": "customField",
      "type": "multivalue",
      "popupBcName": "myEntityAssocListPopup",
      "assocValueKey": "customField",
      "displayedKey": "customFieldCalc"
    }
  ]
}

    Step 6 Add to .widget.json. 

    {
  "name": "MyExampleInfo",
  "title": "Info title",
  "type": "Info",
  "bc": "myExampleBc",
  "fields": [
    {
      "label": "Custom Field",
      "key": "customField",
      "type": "multivalue",
      "popupBcName": "myEntityAssocListPopup",
      "assocValueKey": "customField"
    }
  ],
  "options": {
    "layout": {
      "rows": [
        {
          "cols": [
            {
              "fieldKey": "customField",
              "span": 12
            }
          ]
        }
      ]
    }
  }
}

    Step 6 Add popupBcName and assocValueKey to .widget.json.

    popupBcName - name bc Step 1.6.AssocListPopup

    `assocValueKey' - field for open AssocListPopup

    {
  "name": "MyExampleForm",
  "title": "Form title",
  "type": "Form",
  "bc": "myExampleBc",
  "fields": [
    {
      "label": "Custom Field",
      "key": "customField",
      "type": "multivalue",
      "popupBcName": "myEntityAssocListPopup",
      "assocValueKey": "customField"
    }
  ],
  "options": {
    "layout": {
      "rows": [
        {
          "cols": [
            {
              "fieldKey": "customField",
              "span": 12
            }
          ]
        }
      ]
    }
  }
}

Placeholder

Live Sample · GitHub

Placeholder allows you to provide a concise hint, guiding users on the expected value. This hint is displayed before any user input. It can be calculated based on business logic of application

How does it look?

not applicable

not applicable

img_plchldr_form.png

How to add?

Example

Add fields.setPlaceholder to corresponding FieldMetaBuilder.

    @Override
    public void buildRowDependentMeta(RowDependentFieldsMeta<MyExampleDTO> fields, InnerBcDescription bcDescription,
            Long id, Long parentId) {
        fields.setEnabled(MyExampleDTO_.customField);
        fields.setPlaceholder(MyExampleDTO_.customField, "Placeholder text");
    }

not applicable

not applicable

Works for Form.

Color

Color allows you to specify a field color. It can be calculated based on business logic of application

Calculated color: Live Sample · GitHub

Constant color: Live Sample · GitHub

How does it look?

img_color_list.png

not applicable

not applicable

How to add?

Example

Step 1 Add custom field for color to corresponding DataResponseDTO. The field can contain a HEX color or be null. 

@Getter
@Setter
@NoArgsConstructor
public class MyEntityMultivalueDTO extends DataResponseDTO {

    @SearchParameter(name = "customField")
    private String customField;

    public MyEntityMultivalueDTO(MyEntity entity) {
        this.id = entity.getId().toString();
        this.customField = entity.getCustomField();
    }

}

Step 2 Add "bgColorKey" : custom field for color to .widget.json. 

{
  "name": "MyExampleList",
  "title": "List title",
  "type": "List",
  "bc": "myExampleBc",
  "fields": [
    {
      "title": "Custom Field",
      "key": "customField",
      "type": "multivalue",
      "popupBcName": "myEntityAssocListPopup",
      "assocValueKey": "customField",
      "displayedKey": "customFieldCalc",
      "bgColorKey": "customFieldColor"
    }
  ]
}

not applicable

not applicable

Add "bgColor" : HEX color to .widget.json. 

{
  "name": "MyExampleList",
  "title": "List title",
  "type": "List",
  "bc": "myExampleBc",
  "fields": [
    {
      "title": "Custom Field",
      "key": "customField",
      "type": "multivalue",
      "popupBcName": "myEntityAssocListPopup",
      "assocValueKey": "customField",
      "bgColor": "#edaa",
      "displayedKey": "customFieldCalc"
    }
  ]
}

not applicable

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Readonly/Editable

Readonly/Editable indicates whether the field can be edited or not. It can be calculated based on business logic of application

Editable Live Sample · GitHub

Readonly Live Sample · GitHub

How does it look?

not applicable

not applicable

img_form.png

img_ro_list.png

img_ro_info.png

img_ro_form.png

How to add?

Example

Step1 Add mapping DTO->entity to corresponding VersionAwareResponseService. 

    @Override
    protected ActionResultDTO<MyExampleDTO> doUpdateEntity(MyEntity entity, MyExampleDTO data,
            BusinessComponent bc) {
        if (data.isFieldChanged(MyExampleDTO_.customFieldAdditional)) {
            entity.setCustomFieldAdditional(data.getCustomFieldAdditional());
        }
        if (data.isFieldChanged(MyExampleDTO_.customField)) {
            entity.getCustomFieldList().clear();
            entity.getCustomFieldList().addAll(data.getCustomField().getValues().stream()
                    .map(MultivalueFieldSingleValue::getId)
                    .filter(Objects::nonNull)
                    .map(Long::parseLong)
                    .map(e -> entityManager.getReference(MyEntityMultivalue.class, e))
                    .toList());
        }

        return new ActionResultDTO<>(entityToDto(bc, entity));
    }

Step2 Add fields.setEnabled to corresponding FieldMetaBuilder. 

    @Override
    public void buildRowDependentMeta(RowDependentFieldsMeta<MyExampleDTO> fields, InnerBcDescription bcDescription,
            Long id, Long parentId) {
        fields.setEnabled(MyExampleDTO_.customFieldAdditional);
        fields.setEnabled(MyExampleDTO_.customField);
    }

not applicable

not applicable

Works for Form.

Option 1 Enabled by default. 

    @Override
    public void buildRowDependentMeta(RowDependentFieldsMeta<MyExampleDTO> fields, InnerBcDescription bcDescription,
            Long id, Long parentId) {

    }

Option 2 Not recommended. Property fields.setDisabled() overrides the enabled field if you use after property fields.setEnabled.

not applicable

not applicable

Works for Form.

Filtering

Live Sample · GitHub

Filtering allows you to search data based on criteria. Search uses in operator which compares ids in this case.

How does it look?

img_filtr_list.gif

not applicable

not applicable

How to add?

Example

Step 1 Add @SearchParameter to corresponding DataResponseDTO. (Advanced customization SearchParameter) 

@Getter
@Setter
@NoArgsConstructor
public class MyExampleDTO extends DataResponseDTO {

    @SearchParameter(name = "customFieldList.id", provider = LongValueProvider.class)
    private MultivalueField customField;

    private String customFieldCalc;

    public MyExampleDTO(MyEntity entity) {
        this.id = entity.getId().toString();
        this.customField = entity.getCustomFieldList().stream().collect(MultivalueField.toMultivalueField(
                e -> String.valueOf(e.getId()),
                MyEntity::getCustomField
        ));
        this.customFieldCalc = StringUtils.abbreviate(entity.getCustomFieldList().stream().map(MyEntity::getCustomField
        ).collect(Collectors.joining(",")), 12);
    }

}

Step 2 Add fields.enableFilter to corresponding FieldMetaBuilder. 

    @Override
    public void buildIndependentMeta(FieldsMeta<MyExampleDTO> fields, InnerBcDescription bcDescription,
            Long parentId) {
        if (configuration.getForceActiveEnabled()) {
            fields.setForceActive(MyExampleDTO_.customField);
        }
        fields.enableFilter(MyExampleDTO_.customField);
    }

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Drilldown

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Validation

Validation allows you to check any business rules for user-entered value. There are types of validation:

1) Exception:Displays a message to notify users about technical or business errors.

Business Exception: Live Sample · GitHub

Runtime Exception: Live Sample · GitHub

2) Confirm: Presents a dialog with an optional message, requiring user confirmation or cancellation before proceeding.

Live Sample · GitHub

3) Field level validation: shows error next to all fields, that validation failed for

Option 1: Live Sample · GitHub

Option 2: Live Sample · GitHub

How does it look?

img_business_error

img_runtime_error

confirm_form

img_javax_stat_list

not applicable

img_business_error

img_runtime_error

confirm_form

img_javax_stat_form

How to add?

Example

BusinessException describes an error within a business process.

Add BusinessException to corresponding VersionAwareResponseService. 

    @Override
    protected ActionResultDTO<MyExampleDTO> doUpdateEntity(MyEntity entity, MyExampleDTO data,
            BusinessComponent bc) {
        if (data.isFieldChanged(MyExampleDTO_.customField)) {
            data.getCustomField().getValues()
                    .stream()
                    .filter(val -> !val.getValue().matches("[A-Za-z]+"))
                    .findFirst()
                    .orElseThrow(() -> new BusinessException().addPopup(ONLY_LETTER));
            entity.getCustomFieldList().clear();
            entity.getCustomFieldList().addAll(data.getCustomField().getValues().stream()
                    .map(MultivalueFieldSingleValue::getId)
                    .filter(Objects::nonNull)
                    .map(Long::parseLong)
                    .map(e -> entityManager.getReference(MyEntity.class, e))
                    .toList());
        }

        return new ActionResultDTO<>(entityToDto(bc, entity));
    }

Works for List.

not applicable

Works for Form.

RuntimeException describes technical error within a business process.

Add RuntimeException to corresponding VersionAwareResponseService. 

    @Override
    protected ActionResultDTO<MyExampleDTO> doUpdateEntity(MyEntity entity, MyExampleDTO data,
            BusinessComponent bc) {
        if (data.isFieldChanged(MyExampleDTO_.customField)) {
            entity.getCustomFieldList().clear();
            entity.getCustomFieldList().addAll(data.getCustomField().getValues().stream()
                    .map(MultivalueFieldSingleValue::getId)
                    .filter(Objects::nonNull)
                    .map(Long::parseLong)
                    .map(e -> entityManager.getReference(MyEntity.class, e))
                    .toList());
            try {
                //call custom function
                throw new Exception("Error");
            } catch (Exception e) {
                throw new RuntimeException("An unexpected error has occurred.");
            }
        }

        return new ActionResultDTO<>(entityToDto(bc, entity));
    }

Works for List.

not applicable

Works for Form.

Add PreAction.confirm to corresponding VersionAwareResponseService.

    @Override
    public Actions<MyExampleDTO> getActions() {
        return Actions.<MyExampleDTO>builder()
                .newAction()
                .action("save", "save")
                .withPreAction(PreAction.confirm("You want to save the value ?"))
                .add()
                .build();
    }

Works for List.

not applicable

Works for Form.

Add javax.validation to corresponding DataResponseDTO.

Use if:

Requires a simple fields check (javax validation) 

@Getter
@Setter
@NoArgsConstructor
public class MyEntityMultivalueDTO extends DataResponseDTO {

    @SearchParameter(name = "customField")
    private String customField;

    public MyEntityMultivalueDTO(MyEntity entity) {
        this.id = entity.getId().toString();
        this.customField = entity.getCustomField();
    }

}

Works for List.

not applicable

Works for Form.

Create сustom service for business logic check.

Use if:

Business logic check required for fields

Step 1 Create сustom method for check. 

    private void validateFields(BusinessComponent bc, MyExampleDTO dto) {
        BusinessError.Entity entity = new BusinessError.Entity(bc);
        if (!String.valueOf(dto.getCustomField()).matches("[A-Za-z]+")) {
            entity.addField(MyExampleDTO_.customField.getName(), "Custom message about required field");
        }
        if (!String.valueOf(dto.getCustomFieldAdditional()).matches("[A-Za-z]+")) {
            entity.addField(MyExampleDTO_.customFieldAdditional.getName(), "Custom message about required field");
        }
        if (entity.getFields().size() > 0) {
                throw new BusinessException().setEntity(entity);
        }
    }

Step 2 Add сustom method for check to corresponding VersionAwareResponseService. 

    @Override
    protected ActionResultDTO<MyExampleDTO> doUpdateEntity(MyEntity entity, MyExampleDTO data,
            BusinessComponent bc) {
        validateFields(bc, data);
        return new ActionResultDTO<>(entityToDto(bc, entity));
    }

Sorting

not applicable

Required

Live Sample · GitHub

Required allows you to denote, that this field must have a value provided.

How does it look?

not applicable

not applicable

img_req_form.png

How to add?

Example

Add fields.setRequired to corresponding FieldMetaBuilder.

    @Override
    public void buildRowDependentMeta(RowDependentFieldsMeta<MyExampleDTO> fields, InnerBcDescription bcDescription,
            Long id, Long parentId) {
        fields.setEnabled(MyExampleDTO_.customField);
        fields.setRequired(MyExampleDTO_.customField);
    }

not applicable

not applicable

Works for Form.