Github user geomacy commented on a diff in the pull request: https://github.com/apache/brooklyn-server/pull/462#discussion_r94390638 --- Diff: core/src/main/java/org/apache/brooklyn/core/objs/BasicSpecParameter.java --- @@ -404,7 +431,126 @@ public static void addParameters(AbstractBrooklynObjectSpec<?, ?> spec, List<? e spec.parametersAdd(BasicSpecParameter.fromSpec(loader.getManagementContext(), spec)); } if (explicitParams.size() > 0) { - spec.parametersAdd(explicitParams); + spec.parametersReplace(resolveParameters(explicitParams, spec.getParameters(), spec)); + } + } + + /** merge parameters against other parameters and known and type-inherited config keys */ + static Collection<SpecParameter<?>> resolveParameters(Collection<? extends SpecParameter<?>> newParams, Collection<? extends SpecParameter<?>> existingReferenceParamsToKeep, AbstractBrooklynObjectSpec<?,?> spec) { + Map<String,SpecParameter<?>> existingToKeep = MutableMap.of(); + if (existingReferenceParamsToKeep!=null) { + for (SpecParameter<?> p: existingReferenceParamsToKeep) { + existingToKeep.put(p.getConfigKey().getName(), p); + } + } + + List<SpecParameter<?>> result = MutableList.<SpecParameter<?>>of(); + for (SpecParameter<?> p: newParams) { + if (p instanceof SpecParameterForInheritance) { + SpecParameter<?> existingP = existingToKeep.remove(p.getConfigKey().getName()); + if (existingP!=null) { + p = ((SpecParameterForInheritance<?>)p).resolveWithAncestor(existingP); + } else { + // TODO find config keys on the type (not available as parameters) + /* we don't currently do this due to low priority; all it means if there is a config key in java, + * and a user wishes to expose it as a parameter, they have to redeclare everything; + * nothing from the config key in java will be inherited */ + p = ((SpecParameterForInheritance<?>)p).resolveWithAncestor((ConfigKey<?>)null); + } + result.add(p); + } else { + existingToKeep.remove(p.getConfigKey().getName()); + result.add(p); + } + } + result.addAll(existingToKeep.values()); + return result; + } + + /** instance of {@link SpecParameter} which includes information about what fields are explicitly set, + * for use with a subsequent merge */ + @SuppressWarnings("serial") + @Beta + static class SpecParameterForInheritance<T> extends BasicSpecParameter<T> { + + private final boolean hasType, hasLabelSet, hasPinnedSet, hasDefaultValue, hasConstraints, hasRuntimeInheritance, hasTypeInheritance; + + private <SensorType> SpecParameterForInheritance(String label, Boolean pinned, ConfigKey<T> config, AttributeSensor<SensorType> sensor, + boolean hasType, boolean hasDefaultValue, boolean hasConstraints, boolean hasRuntimeInheritance, boolean hasTypeInheritance) { + super(Preconditions.checkNotNull(label!=null ? label : config.getName(), "label or config name must be set"), + pinned==null ? true : pinned, config, sensor); + this.hasType = hasType; + this.hasLabelSet = label!=null; + this.hasPinnedSet = pinned!=null; + this.hasDefaultValue = hasDefaultValue; + this.hasConstraints = hasConstraints; + this.hasRuntimeInheritance = hasRuntimeInheritance; + this.hasTypeInheritance = hasTypeInheritance; + } + + /** used if yaml specifies a parameter, but possibly incomplete, and a spec supertype has a parameter */ + SpecParameter<?> resolveWithAncestor(SpecParameter<?> ancestor) { + if (ancestor==null) return new BasicSpecParameter<>(getLabel(), isPinned(), getConfigKey(), getSensor()); + + return new BasicSpecParameter<>( + hasLabelSet ? getLabel() : ancestor.getLabel(), + hasPinnedSet ? isPinned() : ancestor.isPinned(), + resolveWithAncestorConfigKey(ancestor.getConfigKey()), + hasType ? getSensor() : ancestor.getSensor()); --- End diff -- ignore that; have looked at it with a fresh eye, the `type` _is_ the sensor type of the parameter.
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. ---