Package org.apache.drill.exec.alias

Interface Aliases

All Known Implementing Classes:

EmptyAliases, PersistentAliasesTable, ResolvedAliases

public interface Aliases

Aliases table. Provides API for managing and obtaining aliases.

Method Summary

Modifier and Type	Method	Description
String	get(String alias)	Returns value from aliases table that corresponds to provided alias.
Iterator<Map.Entry<String,String>>	getAllAliases()	Returns iterator for all entries of {@link this} aliases table.
String	getKey()	Key of {@link this} aliases table.
boolean	put(String alias, String value, boolean replace)	Associates provided alias with provided alias in aliases table.
boolean	remove(String alias)	Removes value for specified alias from aliases table.

Method Details

getKey

String getKey()

Key of {@link this} aliases table.

get

String get(String alias)

Returns value from aliases table that corresponds to provided alias.

Parameters:

alias - alias of the value to obtain

Returns:

value from aliases table that corresponds to provided alias

put

boolean put(String alias,
 String value,
 boolean replace)

Associates provided alias with provided alias in aliases table.

Parameters:

alias - alias of the value to associate with

value - value that will be associated with provided alias

replace - whether existing value for the same alias should be replaced

Returns:

true if provided alias was associated with the provided value in aliases table

remove

boolean remove(String alias)

Removes value for specified alias from aliases table.

Parameters:

alias - alias of the value to remove

Returns:

true if the value associated with provided alias was removed from the aliases table

getAllAliases

Iterator<Map.Entry<String,String>> getAllAliases()

Returns iterator for all entries of {@link this} aliases table.