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package org.onap.sdc.dcae.ves;
import com.google.gson.Gson;
import org.apache.commons.lang.StringUtils;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.function.Predicate;
import java.util.stream.Collectors;
public class EventListenerDefinition extends VesDataTypeDefinition {
public static final String EVENT_ROOT = "event";
private String $schema;
private Map<String, VesDataTypeDefinition> definitions;
public String get$schema() {
return $schema;
}
public void set$schema(String $schema) {
this.$schema = $schema;
}
public Map<String, VesDataTypeDefinition> getDefinitions() {
return definitions;
}
public void setDefinitions(Map<String, VesDataTypeDefinition> definitions) {
this.definitions = definitions;
}
// returns error message detailing unresolvable types - or null (success)
public String resolveRefTypes() {
Predicate<Map.Entry<String, VesDataTypeDefinition>> isFullyResolved = dt -> !dt.getValue().containsAnyReferenceItem();
Map<String, VesDataTypeDefinition> resolved = definitions.entrySet().stream()
.filter(isFullyResolved)
.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
int initialUnresolvedItems = -1;
int remainingUnresolvedItems = 0;
while (resolved.size() != definitions.size() && initialUnresolvedItems != remainingUnresolvedItems) {
initialUnresolvedItems = definitions.size() - resolved.size();
definitions.entrySet().forEach(definition -> {
if (!resolved.containsKey(definition.getKey()) && definition.getValue().isResolvable(resolved)) {
definition.getValue().resolveAllReferences(resolved);
resolved.put(definition.getKey(), definition.getValue());
}
});
remainingUnresolvedItems = definitions.size() - resolved.size();
}
if (resolved.size() != definitions.size()) {
definitions.keySet().removeAll(resolved.keySet());
return constructErrorMessage(definitions.keySet());
}
return resolveRootRefTypes();
}
private String constructErrorMessage(Set<String> unresolvable) {
return "the following definitions containing unresolvable references: " + new Gson().toJson(unresolvable);
}
private String resolveRootRefTypes() {
Set<String> unresolvable = new HashSet<>();
getProperties().forEach((k, v) -> {
if (isResolvable(definitions))
resolveAllReferences(definitions);
else
unresolvable.add(k);
});
return unresolvable.isEmpty() ? null : constructErrorMessage(unresolvable);
}
@Override
public String validate() {
String error = getProperties().containsKey(EVENT_ROOT) ? null : "schema not containing property: event";
if (StringUtils.isBlank(error))
error = super.validate();
if (StringUtils.isBlank(error))
error = validateDefinitions();
return error;
}
private String validateDefinitions() {
String error = null;
for (VesDataTypeDefinition def : definitions.values()) {
if (StringUtils.isBlank(error))
error = def.validate();
else
break;
}
return error;
}
}
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