/**
* Tries to locate resource id attribute
*
* @param result an evaluation result
* @return a resource id attribute
*/
private String getResourceId(Result result) {
if (log.isDebugEnabled()) {
log.debug("Mapping result=\"{}\" to resourceId", result);
}
Category resource = result.getAttribute(Categories.RESOURCE);
if (resource == null) {
return null;
}
Collection<Attribute> attrs = resource.getEntity().getAttributes(RESOURCE_ID);
if (attrs.size() == 1) {
Attribute resourceId = Iterables.getOnlyElement(attrs);
AttributeExp v = Iterables.getOnlyElement(resourceId.getValues());
Optional<TypeToString> toString = TypeToString.Types.getIndex().get(v.getType());
Preconditions.checkState(toString.isPresent());
return toString.get().toString(v);
}
Collection<AttributeExp> values =
resource.getEntity().getAttributeValues(CONTENT_SELECTOR, XacmlTypes.XPATH);
if (values.isEmpty() || values.size() > 1) {
return null;
}
AttributeExp v = Iterables.getOnlyElement(values);
Optional<TypeToString> toString = TypeToString.Types.getIndex().get(v.getType());
Preconditions.checkState(toString.isPresent());
return toString.get().toString(v);
}
private void serializeValue(
JsonSerializationContext context, JsonObject o, Collection<AttributeExp> values) {
checkArgument(values != null && !values.isEmpty(), "Attribute value is mandatory.");
AttributeExp firstValue = Iterables.getFirst(values, null);
o.addProperty(DATA_TYPE_PROPERTY, firstValue.getType().getShortDataTypeId());
Optional<TypeToGSon> toGson = TypeToGSon.Types.getIndex().get(firstValue.getType());
checkState(toGson.isPresent());
if (values.size() == 1) {
o.add(VALUE_PROPERTY, toGson.get().toJson(firstValue, context));
return;
}
JsonArray array = new JsonArray();
for (AttributeExp a : values) {
checkArgument(firstValue.getType().equals(a.getType()));
array.add(toGson.get().toJson(a, context));
}
o.add(VALUE_PROPERTY, array);
}