Package tripleplay.syncdb

Class DBUtil

java.lang.Object

tripleplay.syncdb.DBUtil

public class DBUtil
extends Object

SyncDB related utility methods.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	MAP_KEY_SEP	The separator used in a map key.
static final String	SUBDB_KEY_SEP	The separator used in a subdb key.

Constructor Summary

Constructors

Constructor	Description
DBUtil()

Method Summary

Modifier and Type	Method	Description
static <E> List<E>	decodeList(String data, Codec<E> codec)	Decodes a list encoded via encodeList(java.util.List<E>, tripleplay.syncdb.Codec<E>).
static <E> Set<E>	decodeSet(String data, Codec<E> codec)	Decodes a set encoded via encodeSet(java.util.Set<E>, tripleplay.syncdb.Codec<E>).
static <E> String	encodeList(List<E> list, Codec<E> codec)	Encodes the supplied list as a string, using the supplied codec for its elements.
static <E> String	encodeSet(Set<E> set, Codec<E> codec)	Encodes the supplied set as a string, using the supplied codec for its elements.
static <K> String	mapKey(String prefix, K key, Codec<K> codec)	Computes the storage (fully qualified) key for the supplied map key.
static String	subDB(String fqKey)	Extracts and returns the subdb prefix from the supplied fully-qualified key.
static String	subDBKey(String prefix, String key)	Computes the storage (fully qualified) key for the supplied subdb property key.

Methods inherited from class java.lang.Object

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

Field Details

MAP_KEY_SEP

public static final String MAP_KEY_SEP

The separator used in a map key. This character must not appear in a normal key.

See Also:

• Constant Field Values

SUBDB_KEY_SEP

public static final String SUBDB_KEY_SEP

The separator used in a subdb key. This character may appear in a normal key, but if the client plans to manage subdb conflict resolution in the aggregate, it is best to avoid using this separator elsewhere.

See Also:

• Constant Field Values

Constructor Details

DBUtil

public DBUtil()

Method Details

decodeSet

public static <E> Set<E> decodeSet(String data,
 Codec<E> codec)

Decodes a set encoded via encodeSet(java.util.Set<E>, tripleplay.syncdb.Codec<E>).

encodeSet

public static <E> String encodeSet(Set<E> set,
 Codec<E> codec)

Encodes the supplied set as a string, using the supplied codec for its elements. The encoded set uses \t to separate; that character should not appear in codec's output.

decodeList

public static <E> List<E> decodeList(String data,
 Codec<E> codec)

Decodes a list encoded via encodeList(java.util.List<E>, tripleplay.syncdb.Codec<E>).

encodeList

public static <E> String encodeList(List<E> list,
 Codec<E> codec)

Encodes the supplied list as a string, using the supplied codec for its elements. The encoded list uses \t to separate; that character should not appear in codec's output.

subDBKey

public static String subDBKey(String prefix,
 String key)

Computes the storage (fully qualified) key for the supplied subdb property key.

subDB

public static String subDB(String fqKey)

Extracts and returns the subdb prefix from the supplied fully-qualified key. Returns null if the supplied key is not a subdb key.

mapKey

public static <K> String mapKey(String prefix,
 K key,
 Codec<K> codec)

Computes the storage (fully qualified) key for the supplied map key.