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com.tangosol.io
Class AbstractBinaryStore

java.lang.Object
com.tangosol.util.Base
com.tangosol.io.AbstractBinaryStore

All Implemented Interfaces:

BinaryStore

Direct Known Subclasses:

BerkeleyDBBinaryStore

public abstract class AbstractBinaryStore

extends Base

implements BinaryStore

Abstract implementation of the BinaryStore interface.

Author:

cp 2003.05.30

Nested Class Summary

Nested classes/interfaces inherited from interface com.tangosol.io.BinaryStore

BinaryStore.KeySetAware, BinaryStore.SizeAware

Constructor Summary

AbstractBinaryStore()

Method Summary

void	erase(Binary binKey) Remove the specified key from the underlying store if present.
void	eraseAll() Remove all data from the underlying store.
static java.io.File	getDefaultDirectory() Obtain a File object for the default directory to use for file storage.
java.util.Iterator	keys() Iterate all keys in the underlying store.
abstract Binary	load(Binary binKey) Return the value associated with the specified key, or null if the key does not have an associated value in the underlying store.
void	store(Binary binKey, Binary binValue) Store the specified value under the specific key in the underlying store.

Constructor Detail

AbstractBinaryStore

public AbstractBinaryStore()

Method Detail

load

public abstract Binary load(Binary binKey)

Return the value associated with the specified key, or null if the key does not have an associated value in the underlying store.

Specified by:

load in interface BinaryStore

Parameters:

binKey - key whose associated value is to be returned

Returns:

the value associated with the specified key, or null if no value is available for that key

store

public void store(Binary binKey,
                  Binary binValue)

Store the specified value under the specific key in the underlying store. This method is intended to support both key/value creation and value update for a specific key.

Specified by:

store in interface BinaryStore

Parameters:

binKey - key to store the value under

binValue - value to be stored

Throws:

java.lang.UnsupportedOperationException - if this implementation or the underlying store is read-only

erase

public void erase(Binary binKey)

Remove the specified key from the underlying store if present.

Specified by:

erase in interface BinaryStore

Parameters:

binKey - key whose mapping is to be removed from the map

Throws:

java.lang.UnsupportedOperationException - if this implementation or the underlying store is read-only

eraseAll

public void eraseAll()

Remove all data from the underlying store.

Specified by:

eraseAll in interface BinaryStore

Throws:

java.lang.UnsupportedOperationException - if this implementation or the underlying store is read-only

keys

public java.util.Iterator keys()

Iterate all keys in the underlying store.

Specified by:

keys in interface BinaryStore

Returns:

a read-only iterator of the keys in the underlying store

Throws:

java.lang.UnsupportedOperationException - if the underlying store is not iterable

getDefaultDirectory

public static java.io.File getDefaultDirectory()

Obtain a File object for the default directory to use for file storage. The default directory is defined by the "java.io.tmpdir" system property.

Returns:

a File object representing the location of the default directory

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