private static Set flattenStackInstancesGroup()

in aws-cloudformation-stackset/src/main/java/software/amazon/cloudformation/stackset/util/InstancesAnalyzer.java [140:176]

28 lines of code
10 McCabe index (conditional complexity)


    private static Set<StackInstance> flattenStackInstancesGroup(
            final Collection<StackInstances> stackInstancesGroup, final boolean isSelfManaged) {

        final Set<StackInstance> flatStacks = new HashSet<>();
        if (CollectionUtils.isNullOrEmpty(stackInstancesGroup)) return flatStacks;

        for (final StackInstances stackInstances : stackInstancesGroup) {
            for (final String region : stackInstances.getRegions()) {

                final Set<String> targets = isSelfManaged ? stackInstances.getDeploymentTargets().getAccounts()
                        : stackInstances.getDeploymentTargets().getOrganizationalUnitIds();

                // Validates expected DeploymentTargets exist in the template
                if (CollectionUtils.isNullOrEmpty(targets)) {
                    throw new CfnInvalidRequestException(
                            String.format("%s should be specified in DeploymentTargets in [%s] model",
                                    isSelfManaged ? "Accounts" : "OrganizationalUnitIds",
                                    isSelfManaged ? "SELF_MANAGED" : "SERVICE_MANAGED"));
                }

                for (final String target : targets) {
                    final StackInstance stackInstance = StackInstance.builder()
                            .region(region).deploymentTarget(target).parameters(stackInstances.getParameterOverrides())
                            .build();

                    // Validates no duplicated stack instance is specified
                    if (flatStacks.contains(stackInstance)) {
                        throw new CfnInvalidRequestException(
                                String.format("Stack instance [%s,%s] is duplicated", target, region));
                    }

                    flatStacks.add(stackInstance);
                }
            }
        }
        return flatStacks;
    }