com.bigdata.rawstore
Class AbstractRawStore

java.lang.Object
  com.bigdata.rawstore.AbstractRawStore

All Implemented Interfaces:

IAddressManager, IRawStore, IStoreSerializer

Direct Known Subclasses:

AbstractRawWormStore, IndexSegmentStore

public abstract class AbstractRawStore
extends Object
implements IRawStore, IStoreSerializer

Abstract base class for IRawStore implementations. This class uses a delegation pattern for the IStoreSerializer interface and does not implement either the methods defined directly by the IRawStore interface nor the methods of the IAddressManager interface. As such it may be used as an abstract base class by any IRawStore implementation.

Version:

$Id: AbstractRawStore.java 2265 2009-10-26 12:51:06Z thompsonbry $

Author:

Bryan Thompson

Field Summary

protected IStoreSerializer

serializer The object that handles serialization.

Fields inherited from interface com.bigdata.rawstore.IAddressManager

NULL

Constructor Summary

AbstractRawStore()
The designated constructor.

Method Summary

Object	deserialize(byte[] b) De-serialize an object using the Java serialization mechanisms.
Object	deserialize(byte[] b, int off, int len) De-serialize an object using the Java serialization mechanisms.
Object	deserialize(ByteBuffer buf) De-serialize an object using the Java serialization mechanisms.
abstract IAddressManager	getAddressManager() Return the delegate object that provides the IAddressManager implementation for this IRawStore.
byte[]	serialize(Object obj) Serialize an object using the Java serialization mechanisms.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.bigdata.rawstore.IRawStore

close, deleteResources, destroy, force, getCounters, getFile, getResourceMetadata, getUUID, isFullyBuffered, isOpen, isReadOnly, isStable, read, size, write

Methods inherited from interface com.bigdata.rawstore.IAddressManager

getByteCount, getOffset, packAddr, toAddr, toString, unpackAddr

Field Detail

serializer

protected final IStoreSerializer serializer

The object that handles serialization.

Constructor Detail

AbstractRawStore

public AbstractRawStore()

The designated constructor.

Method Detail

getAddressManager

public abstract IAddressManager getAddressManager()

Return the delegate object that provides the IAddressManager implementation for this IRawStore.

Note: LRUNexus depends on the delegation model to retain references to the IAddressManager without causing the IRawStore to be retained. It uses the IAddressManager to decode the address in order to track the bytesOnDisk for the buffered records.

deserialize

public final Object deserialize(byte[] b,
                                int off,
                                int len)

Description copied from interface: IStoreSerializer

De-serialize an object using the Java serialization mechanisms.

Specified by:

deserialize in interface IStoreSerializer

Parameters:

b - A byte[] containing a serialized object.

off - The offset of the first byte to de-serialize.

len - The #of bytes in the object record.

Returns:

The de-serialized object.

deserialize

public final Object deserialize(byte[] b)

Description copied from interface: IStoreSerializer

De-serialize an object using the Java serialization mechanisms.

Specified by:

deserialize in interface IStoreSerializer

Parameters:

b - A byte[] containing a serialized object.

Returns:

The de-serialized object.

deserialize

public final Object deserialize(ByteBuffer buf)

Description copied from interface: IStoreSerializer

De-serialize an object using the Java serialization mechanisms.

Specified by:

deserialize in interface IStoreSerializer

Parameters:

buf - A buffer containing a serialized object. The bytes from Buffer.position() to Buffer.limit() will be de-serialized and the position will be advanced to the limit.

Returns:

The de-serialized object.

serialize

public final byte[] serialize(Object obj)

Description copied from interface: IStoreSerializer

Serialize an object using the Java serialization mechanisms.

Specified by:

serialize in interface IStoreSerializer

Parameters:

obj - A Serializable object.

Returns:

The serialized object state.