com.github.basking2.sdsai.dsds.io

Class IONodeStore<USERKEY>

java.lang.Object

com.github.basking2.sdsai.dsds.io.IONodeStore<USERKEY>

Type Parameters:

USERKEY - The user key.

All Implemented Interfaces:

NodeStore<USERKEY,byte[],java.io.InputStream>

public class IONodeStore<USERKEY>
extends java.lang.Object
implements NodeStore<USERKEY,byte[],java.io.InputStream>

An implementation of NodeStore that stores and returns streams of data.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	IONodeStore.NodeAccessor<USERKEY> How a IONodeStore accesses Node data.

Constructor Summary

Constructors

Constructor and Description
IONodeStore(IONodeStore.NodeAccessor<USERKEY> accessor)

Method Summary

Modifier and Type	Method and Description
byte[]	convert(USERKEY key) By default this returns the key parameter.
byte[]	generateKey(Node<USERKEY,byte[]> node, java.io.InputStream inputStream) Generate a key to store a node or data element.
java.io.InputStream	loadData(byte[] key) Load the user's data.
Node<USERKEY,byte[]>	loadNode(byte[] key) Load a node object from NodeStore.
void	removeData(byte[] key) Remove the given data key.
void	removeNode(byte[] key) Remove the given node key.
void	store(byte[] key, java.io.InputStream data) Store user data.
void	store(byte[] key, Node<USERKEY,byte[]> node) Store the given node.

Methods inherited from class java.lang.Object

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

Constructor Detail

IONodeStore

public IONodeStore(IONodeStore.NodeAccessor<USERKEY> accessor)

Method Detail

loadData

public java.io.InputStream loadData(byte[] key)

Description copied from interface: NodeStore

Load the user's data.

Specified by:

loadData in interface NodeStore<USERKEY,byte[],java.io.InputStream>

Returns:

the user's data or null if it is not found.

loadNode

public Node<USERKEY,byte[]> loadNode(byte[] key)

Description copied from interface: NodeStore

Load a node object from NodeStore.

Specified by:

loadNode in interface NodeStore<USERKEY,byte[],java.io.InputStream>

store

public void store(byte[] key,
                  java.io.InputStream data)

Description copied from interface: NodeStore

Store user data. If an object already exists at the key, it should be replaced.

Specified by:

store in interface NodeStore<USERKEY,byte[],java.io.InputStream>

store

public void store(byte[] key,
                  Node<USERKEY,byte[]> node)

Description copied from interface: NodeStore

Store the given node. If an object already exists at the key, it should be replaced.

Specified by:

store in interface NodeStore<USERKEY,byte[],java.io.InputStream>

removeNode

public void removeNode(byte[] key)

Description copied from interface: NodeStore

Remove the given node key. If the key does not exist, this should return without error.

Specified by:

removeNode in interface NodeStore<USERKEY,byte[],java.io.InputStream>

removeData

public void removeData(byte[] key)

Description copied from interface: NodeStore

Remove the given data key. If the key does not exist, this should return without error.

Specified by:

removeData in interface NodeStore<USERKEY,byte[],java.io.InputStream>

generateKey

public byte[] generateKey(Node<USERKEY,byte[]> node,
                          java.io.InputStream inputStream)

Description copied from interface: NodeStore

Generate a key to store a node or data element. This key must be unique.

Specified by:

generateKey in interface NodeStore<USERKEY,byte[],java.io.InputStream>

Parameters:

node - This is provided to implementations for some context. If generateKey is being called for the purposes of storing a user key, this will be null.

inputStream - If a key is being generated for a user key value, it will be passed along. This is most useful when things like a PagedList are adding a value, but the List API does not provide a way to specify a key.

convert

public byte[] convert(USERKEY key)

By default this returns the key parameter.

Specified by:

convert in interface NodeStore<USERKEY,byte[],java.io.InputStream>

Parameters:

key - The user key. This is returned as the storage key.

Returns:

Return a key for use in storing data.