+ Component server = findComponent(aComponent);
+
+ if (server == null) {
+ throw new SystemAssemblyException("No component '" + aComponent
+ + "' in the container");
+ }
+
+ if (aProvidedInterface != null) {
+ if (findInterface(server.getProvidedInterfaces(), aProvidedInterface) == null) {
+ throw new SystemAssemblyException(getQualifiedName()
+ + ": Component '" + aComponent
+ + "' does not have a provided interface named '"
+ + aProvidedInterface + "'");
+ }
+ }
+
+ if (aExternalProvided != null) {
+ if (findInterface(getProvidedInterfaces(), aExternalProvided) == null) {
+ throw new SystemAssemblyException(getQualifiedName()
+ + ": Container does not have a provided interface named '"
+ + aExternalProvided + "'");
+ }
+ }