Package weka.core.metastore

Class XMLFileBasedMetaStore

java.lang.Object

weka.core.metastore.XMLFileBasedMetaStore

All Implemented Interfaces:

MetaStore

public class XMLFileBasedMetaStore
extends Object
implements MetaStore

A simple default implementation of MetaStore that uses Weka's XML serialization mechanism to persist entries as XML files in ${WEKA_HOME}/wekaMetaStore

Version:

$Revision: 14281 $

Author:

Mark Hall (mhall{[at]}pentaho{[dot]}com)

Field Summary

Fields

Modifier and Type	Field	Description
static final String	DEFAULT_STORE_LOCATION	The default location for the XML files

Constructor Summary

Constructors

Constructor	Description
XMLFileBasedMetaStore()

Method Summary

Modifier and Type	Method	Description
void	createStore(String storeName)	Create a named store
Object	getEntry(String storeName, String name, Class<?> clazz)	Get a named entry from the store
Set<String>	listMetaStoreEntries(String storeName)	Get a list of all entries in a named store
Set<String>	listMetaStoreEntries(String storeName, String prefix)	Get a list of all named entries starting with the given prefix
Set<String>	listMetaStores()	Get a list of all named meta stores
void	storeEntry(String storeName, String name, Object toStore)	Store a named entry

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_STORE_LOCATION

public static final String DEFAULT_STORE_LOCATION

The default location for the XML files

Constructor Details

XMLFileBasedMetaStore

public XMLFileBasedMetaStore()

Method Details

listMetaStores

public Set<String> listMetaStores()
                           throws IOException

Description copied from interface: MetaStore

Get a list of all named meta stores

Specified by:

listMetaStores in interface MetaStore

Returns:

a list of meta stores

Throws:

IOException - if a problem occurs

listMetaStoreEntries

public Set<String> listMetaStoreEntries(String storeName)
                                 throws IOException

Description copied from interface: MetaStore

Get a list of all entries in a named store

Specified by:

listMetaStoreEntries in interface MetaStore

Parameters:

storeName - the name of the store to get entries for

Returns:

a list of all entries in the named store

Throws:

IOException - if a problem occurs

listMetaStoreEntries

public Set<String> listMetaStoreEntries(String storeName,
 String prefix)
                                 throws IOException

Description copied from interface: MetaStore

Get a list of all named entries starting with the given prefix

Specified by:

listMetaStoreEntries in interface MetaStore

Parameters:

storeName - the name of the store to get entries for

prefix - the prefix with which to search for entries

Returns:

a list of entries

Throws:

IOException - if a problem occurs

getEntry

public Object getEntry(String storeName,
 String name,
 Class<?> clazz)
                throws IOException

Description copied from interface: MetaStore

Get a named entry from the store

Specified by:

getEntry in interface MetaStore

Parameters:

storeName - the name of the store to use

name - the full name of the entry to retrieve

clazz - the expected class of the entry when deserialized

Returns:

the deserialized entry or null if the name does not exist in the store

Throws:

IOException - if the deserialized entry does not match the expected class

createStore

public void createStore(String storeName)
                 throws IOException

Description copied from interface: MetaStore

Create a named store

Specified by:

createStore in interface MetaStore

Parameters:

storeName - the name of the store to create

Throws:

IOException - if a problem occurs

storeEntry

public void storeEntry(String storeName,
 String name,
 Object toStore)
                throws IOException

Description copied from interface: MetaStore

Store a named entry

Specified by:

storeEntry in interface MetaStore

Parameters:

storeName - the name of the store to use

name - the full name of the entry to store

toStore - a beans compliant object to store

Throws:

IOException - if a problem occurs