/** Clear all KS/CF metadata and reset version. */
public synchronized void clear() {
for (String table : getNonSystemTables()) {
KSMetaData ksm = getTableDefinition(table);
for (CFMetaData cfm : ksm.cfMetaData().values()) purge(cfm);
clearTableDefinition(ksm);
}
updateVersionAndAnnounce();
}
/**
* Load specific keyspace into Schema
*
* @param keyspaceDef The keyspace to load up
* @return self to support chaining calls
*/
public Schema load(KSMetaData keyspaceDef) {
for (CFMetaData cfm : keyspaceDef.cfMetaData().values()) load(cfm);
setTableDefinition(keyspaceDef);
return this;
}
/**
* Get metadata about table inner ColumnFamilies
*
* @param tableName The name of the table
* @return metadata about ColumnFamilies the belong to the given table
*/
public Map<String, CFMetaData> getTableMetaData(String tableName) {
assert tableName != null;
KSMetaData ksm = tables.get(tableName);
assert ksm != null;
return ksm.cfMetaData();
}
/**
* Given a table name & column family name, get the column family meta data. If the table name or
* column family name is not valid this function returns null.
*
* @param tableName The table name
* @param cfName The ColumnFamily name
* @return ColumnFamily Metadata object or null if it wasn't found
*/
public CFMetaData getCFMetaData(String tableName, String cfName) {
assert tableName != null;
KSMetaData ksm = tables.get(tableName);
return (ksm == null) ? null : ksm.cfMetaData().get(cfName);
}