Empty Entry In Elementlist Simplexml

my question is simple, but I can't find nothing about it. I Have a list class and an entry class for XML Serialization: @Root(name = 'entries') public class List { @ElementLis

Solution 1:

You can check for empty elements manually:

@Root(name = "entries")@Convert(List.ListConverter.class)// Set the converterpublicclassList
{
    @ElementList(required = false, entry = "entry", inline = true, empty = true)private java.util.List<Entry> entries;


    publicvoidadd(Entry e)
    {
        // Just for testing
        entries.add(e);
    }



    staticclassListConverterimplementsConverter<List>
    {
        @Overridepublic List read(InputNode node)throws Exception
        {
            Listl=newList();
            InputNodechild= node.getNext("entry");

            while( child != null)
            {
                if( child.isEmpty() == true ) // child is an empty tag
                {
                    // Do something if entry is empty
                }
                else// child is not empty
                {
                    Entrye=newPersister().read(Entry.class, child); // Let the Serializer read the Object
                    l.add(e);
                }

                child = node.getNext("entry");
            }

            return l;
        }


        @Overridepublicvoidwrite(OutputNode node, List value)throws Exception
        {
            // Not required for reading ...thrownewUnsupportedOperationException("Not supported yet.");
        }
    }
}

How to use:

Serializerser=newPersister(newAnnotationStrategy()); // Set AnnotationStrategy here!Listl= ser.read(List.class, yourSourceHere);

Documentation:

• Converter
• AnnotationStrategy

Solution 2:

To avoid the error in parse do one should place annotation tags @set e @get

@Root(name = "entries", strict = false)
public class List {

@set:ElementList(required = false, entry = "entry", inline = true, empty = true)
@get:ElementList(required = false, entry = "entry", inline = true, empty = true)
    private List<Entry> entries;

}

@Root
public class Entry {

    @set:Element(name = "entry_id", required = true)
    @get:Element(name = "entry_id", required = true)
    private long id;

    @set:Element(name = "text", required = true)
    @get:Element(name = "text", required = true)
    private String Text;
}