@Override
public ValidationResult validate(String subject, String uri, ValidationContext context) {
Configuration conf = getConfiguration(context.getProperty(CONF_XML_FILES).getValue());
String inputUri = context.getProperty(INPUT_SCHEMA).getValue();
String error = null;
final boolean elPresent =
context.isExpressionLanguageSupported(subject)
&& context.isExpressionLanguagePresent(uri);
if (!elPresent) {
try {
Schema outputSchema = getSchema(uri, conf);
Schema inputSchema = getSchema(inputUri, conf);
// Get the explicitly mapped fields. This is identical to
// logic in onTrigger, but ValidationContext and
// ProcessContext share no ancestor, so we cannot generalize
// the code.
Map<String, String> fieldMapping = new HashMap<>();
for (final Map.Entry<PropertyDescriptor, String> entry :
context.getProperties().entrySet()) {
if (entry.getKey().isDynamic()) {
fieldMapping.put(entry.getKey().getName(), entry.getValue());
}
}
AvroRecordConverter converter =
new AvroRecordConverter(inputSchema, outputSchema, fieldMapping);
Collection<String> unmappedFields = converter.getUnmappedFields();
if (unmappedFields.size() > 0) {
error = "The following fields are unmapped: " + unmappedFields;
}
} catch (SchemaNotFoundException e) {
error = e.getMessage();
}
}
return new ValidationResult.Builder()
.subject(subject)
.input(uri)
.explanation(error)
.valid(error == null)
.build();
}
