Github user aledsage commented on the issue:
https://github.com/apache/brooklyn-server/pull/280
@grkvlt when will you have a chance to look at this PR again?
I tried writing a test for you (adding it to `ConfigParametersYamlTest`),
but it fails:
```
@Test
public void testConfigParameterWithEntitySpecAsDefault() throws
Exception {
addCatalogItems(
"brooklyn.catalog:",
" itemType: entity",
" items:",
" - id: entity-with-keys",
" item:",
" type: "+TestEntity.class.getName(),
" brooklyn.parameters:",
" - name: my.param.key",
" type: "+EntitySpec.class.getName(),
" default: ",
" $brooklyn:entitySpec:",
" - type: "+BasicApplication.class.getName());
String yaml = Joiner.on("\n").join(
"services:",
"- type: entity-with-keys");
Entity app = createStartWaitAndLogApplication(yaml);
TestEntity entity = (TestEntity)
Iterables.getOnlyElement(app.getChildren());
Object defaultVal =
entity.config().get(entity.getEntityType().getConfigKey("my.param.key"));
assertEquals(defaultVal instanceof EntitySpec,
"defaultVal="+defaultVal);
assertEquals(((EntitySpec<?>)defaultVal).getType(),
BasicApplication.class, "defaultVal="+defaultVal);
Entity child = entity.addChild((EntitySpec<?>)defaultVal);
assertTrue(child instanceof BasicApplication, "child="+child);
}
```
The error I get is:
```
org.apache.brooklyn.util.javalang.coerce.ClassCoercionException: Cannot
coerce type
org.apache.brooklyn.camp.brooklyn.spi.creation.EntitySpecConfiguration to
org.apache.brooklyn.api.entity.EntitySpec
(org.apache.brooklyn.camp.brooklyn.spi.creation.EntitySpecConfiguration@5a35672e):
no adapter known
```
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