@Override
public Filter parse(QueryParseContext parseContext) throws IOException, QueryParsingException {
XContentParser parser = parseContext.parser();
XContentParser.Token token;
boolean cache = false; // no need to cache it by default, changes a lot?
CacheKeyFilter.Key cacheKey = null;
// also, when caching, since its isCacheable is false, will result in loading all bit set...
String script = null;
String scriptLang = null;
Map<String, Object> params = null;
String filterName = null;
String currentFieldName = null;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.START_OBJECT) {
if ("params".equals(currentFieldName)) {
params = parser.map();
} else {
throw new QueryParsingException(
parseContext.index(), "[script] filter does not support [" + currentFieldName + "]");
}
} else if (token.isValue()) {
if ("script".equals(currentFieldName)) {
script = parser.text();
} else if ("lang".equals(currentFieldName)) {
scriptLang = parser.text();
} else if ("_name".equals(currentFieldName)) {
filterName = parser.text();
} else if ("_cache".equals(currentFieldName)) {
cache = parser.booleanValue();
} else if ("_cache_key".equals(currentFieldName) || "_cacheKey".equals(currentFieldName)) {
cacheKey = new CacheKeyFilter.Key(parser.text());
} else {
throw new QueryParsingException(
parseContext.index(), "[script] filter does not support [" + currentFieldName + "]");
}
}
}
if (script == null) {
throw new QueryParsingException(
parseContext.index(), "script must be provided with a [script] filter");
}
if (params == null) {
params = newHashMap();
}
Filter filter =
new ScriptFilter(
scriptLang, script, params, parseContext.scriptService(), parseContext.lookup());
if (cache) {
filter = parseContext.cacheFilter(filter, cacheKey);
}
if (filterName != null) {
parseContext.addNamedFilter(filterName, filter);
}
return filter;
}
