Upgrade to Cuba 7 and lambda functions not being recognised

Support
#1

Hi,

I have a 6.10 project, and upgrading to 7.0.5.

However the lambda functions I have (see example below) are in red and I’m having to convert them to non-lambda functions - is this correct?

jobStatusField.addValueChangeListener(e -> {
    getItem().setStatus((String)e.getValue());
});

and I’m having to change it to

jobStatusField.addValueChangeListener(new Consumer<com.haulmont.cuba.gui.components.HasValue.ValueChangeEvent>() {
    @Override
    public void accept(com.haulmont.cuba.gui.components.HasValue.ValueChangeEvent e) {
        getItem().setStatus((String)e.getValue());
    }
});
#2

Hi,

Since 7.0 you have to specify type of the value for a Component, e.g.:

@Inject
private LookupField<JobStatus> jobStatusField;
@Inject
private TextField<String> valueField;

You can easily do this for the entire screen in IntelliJ IDEA:

  1. Set cursor on a field without type that is highlighted with inspection (yellow background)
  2. Trigger Alt-Enter shortcut
  3. Select Change field type to
  4. Use right arrow key and apply Fix all in the file option

apply-fix

See also Release notes.

So, you do not need to change your lambdas back to classes. Due to Java type erasure you only need to specify a correct type for the variable.

Once you’ve set correct types your code can be simplified, slightly:

jobStatusField.addValueChangeListener(e -> {
    getItem().setStatus(e.getValue());
});

No need to cast value of the event anymore.

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