/**
* Helper for providing a JSON string as a value for a setting.
*
* @param conf the Configuration
* @param key the key for the setting
* @param value the JSON string value
*/
public static void setJSON(final Configuration conf, final String key, final String value) {
try {
final Object dbObj = JSON.parse(value);
setDBObject(conf, key, (DBObject) dbObj);
} catch (final Exception e) {
LOG.error("Cannot parse JSON...", e);
throw new IllegalArgumentException(
"Provided JSON String is not representable/parseable as a DBObject.", e);
}
}
public static Configuration buildConfiguration(final Map<String, Object> data) {
Configuration newConf = new Configuration();
for (Entry<String, Object> entry : data.entrySet()) {
String key = entry.getKey();
Object val = entry.getValue();
if (val instanceof String) {
newConf.set(key, (String) val);
} else if (val instanceof Boolean) {
newConf.setBoolean(key, (Boolean) val);
} else if (val instanceof Integer) {
newConf.setInt(key, (Integer) val);
} else if (val instanceof Float) {
newConf.setFloat(key, (Float) val);
} else if (val instanceof DBObject) {
setDBObject(newConf, key, (DBObject) val);
} else {
throw new RuntimeException(
"can't convert " + val.getClass() + " into any type for Configuration");
}
}
return newConf;
}
public static void setInputSplitKey(final Configuration conf, final DBObject key) {
setDBObject(conf, INPUT_SPLIT_KEY_PATTERN, key);
}
/**
* Specify the sort order as a DBObject.
*
* @param conf the Configuration
* @param sort the sort document
*/
public static void setSort(final Configuration conf, final DBObject sort) {
setDBObject(conf, INPUT_SORT, sort);
}
/**
* Specify a projection document for documents retrieved from MongoDB.
*
* @param conf the Configuration
* @param fields a projection document
*/
public static void setFields(final Configuration conf, final DBObject fields) {
setDBObject(conf, INPUT_FIELDS, fields);
}
/**
* Set the query set for the Job using a DBObject.
*
* @param conf the Configuration
* @param query the query
*/
public static void setQuery(final Configuration conf, final DBObject query) {
setDBObject(conf, INPUT_QUERY, query);
}