org.apache.hadoop.hive.metastore.tools

Class Util

java.lang.Object

org.apache.hadoop.hive.metastore.tools.Util

public final class Util
extends Object

Helper utilities. The Util class is just a placeholder for static methods, it should be never instantiated.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Util.DatabaseBuilder A builder for Database.
static class	Util.PartitionBuilder Builder of partitions.
static class	Util.TableBuilder Builder for Table.
static interface	Util.ThrowingSupplier<T,E extends Exception> Version of the Supplier that can throw exceptions.

Method Summary

Modifier and Type	Method and Description
static List<org.apache.hadoop.hive.metastore.api.FieldSchema>	createSchema(@Nullable List<String> params) Create table schema from parameters.
static List<String>	filterMatches(@Nullable List<String> candidates, @Nullable Pattern[] positivePatterns, @Nullable Pattern[] negativePatterns) Filter candidates - find all that match positive matches and do not match any negative matches.
static @Nullable URI	getServerUri(@Nullable String host, @Nullable String portString) Get server URI.
static <T> T	throwingSupplierWrapper(Util.ThrowingSupplier<T,Exception> throwingSupplier) Wrapper that moves all checked exceptions to RuntimeException.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

throwingSupplierWrapper

public static <T> T throwingSupplierWrapper(Util.ThrowingSupplier<T,Exception> throwingSupplier)

Wrapper that moves all checked exceptions to RuntimeException.

Type Parameters:

T - Supplier return type

Parameters:

throwingSupplier - Supplier that throws Exception

Returns:

Supplier that throws unchecked exception

createSchema

public static List<org.apache.hadoop.hive.metastore.api.FieldSchema> createSchema(@Nullable
                                                                                  @Nullable List<String> params)

Create table schema from parameters.

Parameters:

params - list of parameters. Each parameter can be either a simple name or name:type for non-String types.

Returns:

table schema description

getServerUri

@Nullable
public static @Nullable URI getServerUri(@Nullable
                                                   @Nullable String host,
                                                   @Nullable
                                                   @Nullable String portString)
                                            throws URISyntaxException

Get server URI.

HMS host is obtained from

1. Argument
2. HMS_HOST environment parameter
3. hms.host Java property
4. use 'localhost' if above fails

HMS Port is obtained from

1. Argument
2. host:port string
3. HMS_PORT environment variable
4. hms.port Java property
5. default port value

Parameters:

host - HMS host string.

portString - HMS port

Returns:

HMS URI

Throws:

URISyntaxException - if URI is is invalid

filterMatches

public static List<String> filterMatches(@Nullable
                                         @Nullable List<String> candidates,
                                         @Nullable
                                         @Nullable Pattern[] positivePatterns,
                                         @Nullable
                                         @Nullable Pattern[] negativePatterns)

Filter candidates - find all that match positive matches and do not match any negative matches.

Parameters:

candidates - list of candidate strings. If null, return an empty list.

positivePatterns - list of regexp that should all match. If null, everything matches.

negativePatterns - list of regexp, none of these should match. If null, everything matches.

Returns:

list of filtered results.