SimpleXML parse ignores @Root name parameter

Question

SimpleXML library has issue. It ignores @Root name. Here is code with test:

Class:

@Root(name = "res", strict = true)
@Data
@NoArgsConstructor
@AllArgsConstructor
class Response {

    @Attribute(name = "a")
    private Integer a;

    @Attribute(name = "i")
    private Integer i;

    @Attribute(name = "o", required = false)
    private Integer o;

}

Test:

    @Test
    public void detectXml() {

        Serializer serializer = new Persister();

        String xml = "<xxx a=\"1\" i=\"1\"/>";

        Response res = null;
        try {
            res = serializer.read(Response.class, xml);
        } catch (Exception e) {
            e.printStackTrace();
        }

        assertNotNull(res);

    }

Test passes no matter what is first tag in xml ie."<xxx" library ignores @Root name "res". Any suggestions beside to switch to another XML parser library? Can anyone suggest one with class annotations like SimpleXML?

Colin Shah · Accepted Answer · 2021-04-15T06:12:42.367

........
@Convert(Response.ResponseConverter.class)
class Response {

    ...........

    public static class ResponseConverter implements Converter<Response> {

        public ResponseTest read(InputNode node) throws Exception {
        String rootAnnotation = ResponseTest.class.getAnnotation(Root.class).name();
        if (!node.getName().equals(rootAnnotation) && node.isRoot()) {
            return null;
        }
        return new ResponseTest();
    }
        .................
    }
}



     @Test
public void detectXml() {

    Serializer serializer = new Persister();

    String xml = "<xxx a=\"1\" i=\"1\"/>";

    ResponseTest res = null;
    try {
        StringReader stringReader = new StringReader(xml);
        res = new Persister(new AnnotationStrategy()).read(ResponseTest.class, NodeBuilder.read(stringReader));
        if (res != null) {
            res = serializer.read(ResponseTest.class, xml);
        }
        System.out.println(res);
    } catch (Exception e) {
        e.printStackTrace();
    }

    Assert.assertNotNull(res);
}

You can override the read method using @Converter annotation and validate the root name by fetching the Annotation value.

This works very well, but now in read() deserialization must be done manualy, even "required" annotation check for attribute "o" — Solata, Apr 12 '21 at 12:36
Is possible to continue with automatic deserialization after @Root node compare in RestponseConverter.read() method? — Solata, Apr 14 '21 at 11:26
There is some indirect way to do it, just check the edited answer. — Colin Shah, Apr 15 '21 at 06:13

SimpleXML parse ignores @Root name parameter

1 Answers1