/**
* Loads a similarity metric if it isn't already loaded.
*
* @param name
* @return
* @throws ConfigurationException
* @throws IOException
*/
public SimilarityMetric loadMetric(String name) throws ConfigurationException, IOException {
if (env.hasMetric(name)) {
return env.getMetric(name);
}
info("loading metric " + name);
String type = requireString(configuration.getMetric(name), "type");
SimilarityMetric metric;
if (type.equals("category")) {
metric = createCategorySimilarity(name);
} else if (type.equals("text")) {
metric = createTextSimilarity(name);
} else if (type.equals("esa")) {
metric = createEsaSimilarity(name);
} else if (type.equals("links")) {
metric = createLinkSimilarity(name);
} else if (type.equals("pairwise")) {
metric = createPairwiseSimilarity(name);
} else if (type.equals("ensemble")) {
metric = loadEnsembleMetric(name);
} else {
throw new ConfigurationException("Unknown metric type: " + type);
}
metric.setName(name);
JSONObject params = configuration.getMetric(name);
if (params.containsKey("normalizer")) {
Normalizer norm = parseNormalizer(requireString(params, "normalizer"));
if (!norm.equals(null)) {
metric.setNormalizer(norm);
}
}
env.addMetric(name, metric);
return metric;
}
