co.cask.cdap.data2.metadata.dataset

Class MdsKey

java.lang.Object

co.cask.cdap.data2.metadata.dataset.MdsKey

public class MdsKey
extends Object

Key used to store metadata values and indexes.

Constructor Summary

Constructors

Constructor and Description
MdsKey()

Method Summary

Methods

Modifier and Type	Method and Description
static MDSKey	getMDSIndexKey(Id.NamespacedId targetId, String key, String index) Creates a key for metadata index row in the format: [INDEX_ROW_PREFIX][targetType][targetId][key][index] for value index rows
static MDSKey	getMDSValueKey(Id.NamespacedId targetId, String key) Creates a key for metadata value row in the format: [VALUE_ROW_PREFIX][targetType][targetId][key] for value index rows
static String	getMetadataKey(String type, byte[] rowKey)
static String	getNamespaceId(MDSKey key)
static Id.NamespacedId	getNamespaceIdFromKey(String type, byte[] rowKey)
static String	getTargetType(byte[] rowKey)

Methods inherited from class java.lang.Object

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

Constructor Detail

MdsKey

public MdsKey()

Method Detail

getMetadataKey

public static String getMetadataKey(String type,
                    byte[] rowKey)

getTargetType

public static String getTargetType(byte[] rowKey)

getMDSValueKey

public static MDSKey getMDSValueKey(Id.NamespacedId targetId,
                    @Nullable
                    String key)

Creates a key for metadata value row in the format: [VALUE_ROW_PREFIX][targetType][targetId][key] for value index rows

getMDSIndexKey

public static MDSKey getMDSIndexKey(Id.NamespacedId targetId,
                    String key,
                    @Nullable
                    String index)

Creates a key for metadata index row in the format: [INDEX_ROW_PREFIX][targetType][targetId][key][index] for value index rows

getNamespaceIdFromKey

public static Id.NamespacedId getNamespaceIdFromKey(String type,
                                    byte[] rowKey)

getNamespaceId

public static String getNamespaceId(MDSKey key)