[SOLVED] Get rid of empty line in XML created by call of JOOX' remove()

Get rid of empty line in XML created by call of JOOX' remove()

I am using joox for XML manipulation.

One of my use cases is the removal of a tag/node under certain circumstances.

Example:

XML input, test.xml:

<?xml version="1.0" encoding="UTF-8"?>
<Parent>
    <Data>
        <Tag1>Apples</Tag1>
        <Tag2>Banana</Tag2>
    </Data>
</Parent>

Java code to load and manipulate XML:

final Match template = $(IOUtils.toString(Objects.requireNonNull(
MyClass.class.getClassLoader().getResourceAsStream("templates/test.xml")), StandardCharsets.UTF_8));
    
if (someCriteria()) {
   template.find("Tag1").remove();
}

The output of the XML should look like this:

<?xml version="1.0" encoding="UTF-8"?>
<Parent>
    <Data>
        <Tag2>Banana</Tag2>
    </Data>
</Parent>

But instead it looks like this

<?xml version="1.0" encoding="UTF-8"?>
<Parent>
    <Data>
        
        <Tag2>Banana</Tag2>
    </Data>
</Parent>

Stack Overflow doesn't pick it up, but the indentation whitespaces are still present, so I tried this additional line of code:

    template.xpath("//text()[normalize-space(.) = '']").remove();

but with no success.

How do i remove an entire line with joox so that there is no gap in the xml output?

Solution

I think you need to try regx.

// first convert to string
String output = template.toString();
output = output.replaceAll("(?m)^\\s*$[\r\n]+", ""); // here is my regx 
System.out.println(output);