Add option ignoreEmptyLines to CsvToXml

[Hooghof]

As a user I want to have the possibility to ignore empty lines if the CSV message body only contains header values and no lines. Currently an error occurs if I enable to use the first line in the CSV as header and there are no lines.

We could also decide to set ignoreEmptyLines standard on true (opinionated) and do not add a new option to the component.

The output could be as follows:

<?xml version="1.0" encoding="UTF-8"?>
<items/>

or in the case where there are new lines below the header line in the CSV

<?xml version="1.0" encoding="UTF-8"?>
<items>
    <item>
        <ID/>
        <Name/>
        <Number/>
    </item>
</items>

Jira: https://dovetailworld.atlassian.net/browse/FG-2630

[skin27]

In Fluxygen 4.17.x (5.0.x) we will use the workaround for 6.0.0 the idea is:

If useHeaders=true and no lines in the body than create this body:

<?xml version="1.0" encoding="UTF-8"?>
<items/>

If useHeaders=true and only contains the header than create it like this:

<?xml version="1.0" encoding="UTF-8"?>
<items>
    <item>
        <ID/>
        <Name/>
        <Number/>
    </item>
</items>

[Hooghof]

I did 2 test cases:

1. CSV body with just a header
2. Empty CSV body

Expected and returned result in test case 1:

<?xml version="1.0" encoding="UTF-8"?>
<items>
    <item>
        <ID/>
        <Name/>
        <Number/>
    </item>
</items>

Expected result in test case 2:

<?xml version="1.0" encoding="UTF-8"?>
<items/>

This test got in this error: No type converter available to convert from type: null to the required type: java.io.InputStream.

Is it possible to ignore the empty body and show the expected response?

Test case
Instance: next
Tenant: Regression Tests
Flow: CsvToXml_default

[skin27]

I tested this with Chrome, but apperently that sends an empty string as body, while curl/postman send a null value that caused the issue. I know check for this explicitly.