private Value reduceMultiValue(
final Key key, final Iterator<Value> iter, final Value firstValue) {
final String group;
try {
group = new String(key.getColumnFamilyData().getBackingArray(), CommonConstants.UTF_8);
} catch (final UnsupportedEncodingException e) {
throw new RuntimeException(e.getMessage(), e);
}
ElementAggregator aggregator;
Properties firstPropertySet;
try {
firstPropertySet = elementConverter.getPropertiesFromValue(group, firstValue);
aggregator = schema.getElement(group).getAggregator();
aggregator.aggregate(firstPropertySet);
while (iter.hasNext()) {
aggregator.aggregate(elementConverter.getPropertiesFromValue(group, iter.next()));
}
} catch (final AccumuloElementConversionException e) {
throw new IllegalArgumentException("Failed to get Properties from an accumulo value", e);
}
final Properties properties = new Properties();
aggregator.state(properties);
try {
return elementConverter.getValueFromProperties(group, properties);
} catch (final AccumuloElementConversionException e) {
throw new IllegalArgumentException("Failed to get Properties from an accumulo value", e);
}
}
@Override
public Properties reduce(final String group, final Key key, final Iterator<Properties> iter) {
if (!iter.hasNext()) {
return new Properties();
}
final Properties properties = iter.next();
if (!iter.hasNext()) {
return properties;
}
final ElementAggregator aggregator = schema.getElement(group).getAggregator();
aggregator.aggregate(properties);
while (iter.hasNext()) {
aggregator.aggregate(iter.next());
}
final Properties aggregatedProperties = new Properties();
aggregator.state(aggregatedProperties);
return aggregatedProperties;
}