private String validateChangeUsage(String hl7Version, Usage referenceUsage, Usage currentUsage) {
try {
if (!this.validUsages(hl7Version).contains(currentUsage.value())) {
return "Invalid usage value.";
} else if (!this.allowedChangesUsage(hl7Version, referenceUsage.value())
.contains(currentUsage.value())) {
return "Selected usage of "
+ currentUsage.value()
+ " is non-compatible with base usage "
+ referenceUsage.value();
}
} catch (IOException e) {
return "Rules file not found";
}
return "ok";
}
private String allowedChangesCardinality(int currentMin, String currentMax, Usage currentUsage) {
String message = "";
// card vs usage
int toBeMax = 0;
if ("*".equalsIgnoreCase(currentMax)) {
toBeMax = Integer.MAX_VALUE;
} else {
toBeMax = Integer.valueOf(currentMax);
}
// if X usage, then cardinality min and max have to be 0
if (currentUsage.value().equalsIgnoreCase(Usage.X.value())) {
if (currentMin != 0 || toBeMax != 0) {
message += "Cardinality Min and Max must be 0 when Usage is: X.\n";
}
}
// if R usage, then cardinality min has to be greater than zero
if (currentUsage.value().equalsIgnoreCase(Usage.R.value())) {
if (!(currentMin > 0)) {
message += "Cardinality Min can not be less than 1 when Usage is: R.\n";
}
if (!(toBeMax > 0)) {
message += "Cardinality Max can not be less than 1 when Usage is: R.\n";
}
}
// if RE usage, then cardinality min has to be greater than zero
if (currentUsage.value().equalsIgnoreCase(Usage.RE.value())) {
if (!(currentMin >= 0)) {
message += "Cardinality Min must be 0 when Usage is: RE.\n";
}
}
// if C,CE,O, or C(a/b) usage, min must be zero
// and cardinality max has to be greater than 1
if (currentUsage.value().equalsIgnoreCase(Usage.O.value())
|| currentUsage.value().equalsIgnoreCase(Usage.C.value())
|| currentUsage.value().equalsIgnoreCase(Usage.CE.value())
|| this.isConditionalUsage(currentUsage)) {
if (!(currentMin == 0) && !(toBeMax >= 1)) {
message += "Cardinality Min must be 0 when Usage is: " + currentUsage.value() + ".\n";
}
}
return message;
}
private boolean isConditionalUsage(Usage usage) {
return usage.value().contains("C(");
}