org.ejtools.archive.io
Class StreamReader

java.lang.Object
  |
  +--org.ejtools.archive.io.StreamReader

All Implemented Interfaces:

Reader

Direct Known Subclasses:

ByteReader, FileReader

public abstract class StreamReader

extends java.lang.Object

implements Reader

Reader implementation based on stream.

Each Archive and each Entry will be created through a ZipInputStream. This classe serves as parent for derived ones.

As the structure is dynamically created, the Visitor Pattern cannot be strictly followed.

Version:

$Revision: 1.2 $

Author:

Laurent Etiemble

Constructor Summary

StreamReader()

Method Summary

protected Entry	createEntry(java.lang.String uri) Helper method to create an entry.
protected java.util.zip.ZipInputStream	getZipInputStream() Returns the current stream
protected java.util.zip.ZipInputStream	popZipInputStream() Pops the last entered stream
protected void	pushZipInputStream(java.util.zip.ZipInputStream stream) Pushes a stream onto the stack
void	visit(Archive archive) Visit an archive.
void	visit(Entry entry) Visit an entry.

Methods inherited from class java.lang.Object

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

Constructor Detail

StreamReader

public StreamReader()

Method Detail

visit

public void visit(Entry entry)

Visit an entry. Do nothing.

Specified by:

visit in interface Reader

Parameters:

entry - The entry to visit

visit

public void visit(Archive archive)

Visit an archive. Each Archive will be build from a ZipInputStream and populated with entries.

Specified by:

visit in interface Reader

Parameters:

archive - The archive to visit

createEntry

protected Entry createEntry(java.lang.String uri)

Helper method to create an entry.

Parameters:

uri - The URI of the entry

Returns:

The new Entry

getZipInputStream

protected java.util.zip.ZipInputStream getZipInputStream()

Returns the current stream

Returns:

The current stream

popZipInputStream

protected java.util.zip.ZipInputStream popZipInputStream()
                                                  throws java.io.IOException

Pops the last entered stream

Returns:

The stream

Throws:

java.io.IOException - If no stream is available

pushZipInputStream

protected void pushZipInputStream(java.util.zip.ZipInputStream stream)
                           throws java.io.IOException

Pushes a stream onto the stack

Parameters:

stream - The stream

Throws:

java.io.IOException - Shoud never occured