org.apache.avalon.cornerstone.blocks.masterstore
Class AbstractFileRepository

java.lang.Object
  org.apache.avalon.cornerstone.blocks.masterstore.AbstractFileRepository

All Implemented Interfaces:

Repository

Direct Known Subclasses:

AbstractFilePersistentObjectRepository, AbstractFilePersistentStreamRepository, AbstractXMLFilePersistentObjectRepository

public abstract class AbstractFileRepository

extends java.lang.Object

implements Repository

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

Author:

Avalon Development Team

Field Summary

protected static int	BYTE_MASK
protected static boolean	DEBUG
protected static java.lang.String	HANDLED_URL
protected static char[]	HEX_DIGITS
protected java.io.File	m_baseDirectory
protected java.lang.String	m_destination
protected java.lang.String	m_extension
protected java.io.FilenameFilter	m_filter
protected java.lang.String	m_name
protected java.lang.String	m_path
protected FileRepositoryMonitor	monitor

Constructor Summary

AbstractFileRepository()

Method Summary

boolean	containsKey(java.lang.String key) Indicates if the given key is associated to a contained object.
protected AbstractFileRepository	createChildRepository()
protected java.lang.String	decode(java.lang.String filename) Inverse of encode exept it do not use path.
protected java.lang.String	encode(java.lang.String key) Returns a String that uniquely identifies the object.
Repository	getChildRepository(java.lang.String childName)
protected abstract java.lang.String	getExtensionDecorator()
protected java.io.File	getFile(java.lang.String key)
protected java.io.InputStream	getInputStream(java.lang.String key)
protected java.io.OutputStream	getOutputStream(java.lang.String key)
protected abstract void	initializeChild(AbstractFileRepository child)
java.util.Iterator	list() Returns the list of used keys.
void	remove(java.lang.String key) Remove the object associated to the given key.
protected void	setDestination(java.lang.String destination)

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

HANDLED_URL

protected static final java.lang.String HANDLED_URL

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_path

protected java.lang.String m_path

m_destination

protected java.lang.String m_destination

m_extension

protected java.lang.String m_extension

m_name

protected java.lang.String m_name

m_filter

protected java.io.FilenameFilter m_filter

m_baseDirectory

protected java.io.File m_baseDirectory

monitor

protected FileRepositoryMonitor monitor

Constructor Detail

AbstractFileRepository

public AbstractFileRepository()

Method Detail

getExtensionDecorator

protected abstract java.lang.String getExtensionDecorator()

setDestination

protected void setDestination(java.lang.String destination)
                       throws java.io.IOException

Throws:

java.io.IOException

createChildRepository

protected AbstractFileRepository createChildRepository()
                                                throws java.lang.Exception

Throws:

java.lang.Exception

getChildRepository

public Repository getChildRepository(java.lang.String childName)

Specified by:

getChildRepository in interface Repository

initializeChild

protected abstract void initializeChild(AbstractFileRepository child)
                                 throws java.lang.Exception

Throws:

java.lang.Exception

getFile

protected java.io.File getFile(java.lang.String key)
                        throws java.io.IOException

Throws:

java.io.IOException

getInputStream

protected java.io.InputStream getInputStream(java.lang.String key)
                                      throws java.io.IOException

Throws:

java.io.IOException

getOutputStream

protected java.io.OutputStream getOutputStream(java.lang.String key)
                                        throws java.io.IOException

Throws:

java.io.IOException

remove

public void remove(java.lang.String key)

Remove the object associated to the given key.

containsKey

public boolean containsKey(java.lang.String key)

Indicates if the given key is associated to a contained object.

list

public java.util.Iterator list()

Returns the list of used keys.

encode

protected java.lang.String encode(java.lang.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.

decode

protected java.lang.String decode(java.lang.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 retive the record contained in the 'filename' file.