org.apache.james.repository.file
Class AbstractFileRepository

java.lang.Object
  org.apache.james.repository.file.AbstractFileRepository

All Implemented Interfaces:

Configurable, LogEnabled, Repository

Direct Known Subclasses:

FilePersistentObjectRepository, FilePersistentStreamRepository

public abstract class AbstractFileRepository
extends Object
implements Repository, Configurable, LogEnabled

This an abstract class implementing functionality for creating a file-store.

Field Summary

protected static int	BYTE_MASK
protected static boolean	DEBUG
protected static char[]	HEX_DIGITS
protected File	m_baseDirectory
protected String	m_extension
protected FilenameFilter	m_filter
protected String	m_name

Constructor Summary

AbstractFileRepository()

Method Summary

void	configure(org.apache.commons.configuration.HierarchicalConfiguration configuration)
boolean	containsKey(String key) Indicates if the given key is associated to a contained object
protected AbstractFileRepository	createChildRepository() Return a new instance of this class
protected String	decode(String filename) Inverse of encode exept it do not use path.
protected String	encode(String key) Returns a String that uniquely identifies the object.
Repository	getChildRepository(String childName)
protected abstract String	getExtensionDecorator()
protected File	getFile(String key) Return the File Object which belongs to the given key
protected InputStream	getInputStream(String key) Return the InputStream which belongs to the given key
protected org.slf4j.Logger	getLogger()
protected OutputStream	getOutputStream(String key) Return the OutputStream which belongs to the given key
void	init()
Iterator<String>	list() Returns the list of used keys.
void	remove(String key) Remove the object associated to the given key.
protected void	setDestination(String destination) Set the destination for the repository
void	setFileSystem(FileSystem fileSystem)
void	setLog(org.slf4j.Logger logger)

Methods inherited from class java.lang.Object

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

Field Detail

DEBUG

protected static final boolean DEBUG

See Also:

Constant Field Values

BYTE_MASK

protected static final int BYTE_MASK

See Also:

Constant Field Values

HEX_DIGITS

protected static final char[] HEX_DIGITS

m_extension

protected String m_extension

m_name

protected String m_name

m_filter

protected FilenameFilter m_filter

m_baseDirectory

protected File m_baseDirectory

Constructor Detail

AbstractFileRepository

public AbstractFileRepository()

Method Detail

configure

public void configure(org.apache.commons.configuration.HierarchicalConfiguration configuration)
               throws org.apache.commons.configuration.ConfigurationException

Specified by:

configure in interface Configurable

Throws:

org.apache.commons.configuration.ConfigurationException

setFileSystem

public void setFileSystem(FileSystem fileSystem)

setLog

public void setLog(org.slf4j.Logger logger)

Specified by:

setLog in interface LogEnabled

getLogger

protected org.slf4j.Logger getLogger()

getExtensionDecorator

protected abstract String getExtensionDecorator()

init

@PostConstruct
public void init()
          throws Exception

Throws:

Exception

setDestination

protected void setDestination(String destination)
                       throws org.apache.commons.configuration.ConfigurationException

Set the destination for the repository

Parameters:

destination - the destination under which the repository get stored

Throws:

org.apache.commons.configuration.ConfigurationException

org.apache.commons.configuration.ConfigurationException - get thrown on invalid destintion syntax

createChildRepository

protected AbstractFileRepository createChildRepository()
                                                throws Exception

Return a new instance of this class

Returns:

class a new instance of AbstractFileRepository

Throws:

Exception - get thrown if an error is detected while create the new instance

getChildRepository

public Repository getChildRepository(String childName)

Specified by:

getChildRepository in interface Repository

See Also:

Repository.getChildRepository(java.lang.String)

getFile

protected File getFile(String key)
                throws IOException

Return the File Object which belongs to the given key

Parameters:

key - the key for which the File get returned

Returns:

file the File associted with the given Key

Throws:

IOException - get thrown on IO error

getInputStream

protected InputStream getInputStream(String key)
                              throws IOException

Return the InputStream which belongs to the given key

Parameters:

key - the key for which the InputStream get returned

Returns:

in the InputStram associted with the given key

Throws:

IOException - get thrown on IO error

getOutputStream

protected OutputStream getOutputStream(String key)
                                throws IOException

Return the OutputStream which belongs to the given key

Parameters:

key - the key for which the OutputStream get returned

Returns:

out the OutputStream

Throws:

IOException - get thrown on IO error

remove

public void remove(String key)

Remove the object associated to the given key.

Parameters:

key - the key to remove

containsKey

public boolean containsKey(String key)

Indicates if the given key is associated to a contained object

Parameters:

key - the key which checked for

Returns:

true if the repository contains the key

list

public Iterator<String> list()

Returns the list of used keys.

encode

protected String encode(String key)

Returns a String that uniquely identifies the object. Note: since this method uses the Object.toString() method, it's up to the caller to make sure that this method doesn't change between different JVM executions (like it may normally happen). For this reason, it's highly recommended (even if not mandated) that Strings be used as keys.

Parameters:

key - the key for which the Object should be searched

Returns:

result a unique String represent the Object which belongs to the key

decode

protected String decode(String filename)

Inverse of encode exept it do not use path. So decode(encode(s) - m_path) = s. In other words it returns a String that can be used as key to retrieve the record contained in the 'filename' file.

Parameters:

filename - the filename for which the key should generated

Returns:

key a String which can be used to retrieve the filename