[GROOVY-10073] Unable to use custom string representation in GString template

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.5.14
• Component/s: Templating
• Assignee: Unassigned
• Reporter: Gallyam Biktashev
• Created: 06/May/21 08:08
• Updated: 06/May/21 13:40

Description

I have a class

class JsonListAdapter implements List {
    private final List<Object> adaptee;
    private final JsonNode node;

    public JsonListAdapter(List<Object> adaptee, JsonNode node) {
        this.adaptee = adaptee;
        this.node = node;
    }

    // methods here

    @Override
    public String toString() {
        return node.toString();
    }
}

I'm expecting that it will work like

var json = "[\"v1\",\"v2\"]";
var node = parseJson(json);
var list = toList(node);
var result = gStringTemplateService.render("${variable}", Map.of("variable", new JsonListAdapter(list, node)));

// both assertions fail for now
Assertions.assertNotEquals("[v1, v2]", result);
Assertions.assertEquals(json, result);

Issue Links

• relates to: GROOVY-2599 unable to overwrite toString() via MOP in some cases