websphinx
Class RewritableLinkTransformer

java.lang.Object
  |
  +--websphinx.HTMLTransformer
        |
        +--websphinx.LinkTransformer
              |
              +--websphinx.RewritableLinkTransformer

Direct Known Subclasses:

Concatenator, MirrorTransformer, RecordTransformer

public class RewritableLinkTransformer

extends LinkTransformer

Transformer that remaps URLs in links in such a way that if the URL mapping changes during (or after) some HTML has been transformed, the HTML can be fixed up after the fact. This class is used by Concatenator and Mirror, since in those operations, the URL mapping function changes as each page is written to the concatenation or mirror.

Field Summary

(package private) static int	BUFFER_SIZE
private boolean	closed
private java.io.File	file
private RewriteRegion	head
(package private) static java.lang.String	PLACEHOLDER
private RewriteRegion	tail

Fields inherited from class websphinx.LinkTransformer

base, emitBaseElement, map, needToEmitBase

Fields inherited from class websphinx.HTMLTransformer

content, emitEnd, emitStart, next, openedStream, readwrite, stream, transformEnd

Constructor Summary

RewritableLinkTransformer(java.lang.String filename)
Make a RewritableLinkTransformer.

Method Summary

private RewriteRegion	addURL(java.net.URL url, long offset, int len)
void	close() Close the transformer.
protected void	handleLink(Link link) Handle a Link's transformation.
void	rewrite() Rewrite the file, remapping all the URLs according to their current values from lookup().

Methods inherited from class websphinx.LinkTransformer

getBase, getEmitBaseElement, handleBase, handleElement, isMapped, lookup, map, map, setBase, setEmitBaseElement, writePage

Methods inherited from class websphinx.HTMLTransformer

emit, emit, emitInternal, emitPendingRegion, finalize, flush, getFilePointer, getOutput, getRandomAccessFile, openFile, processElementsInRegion, seek, setOutput, setOutput, setRandomAccessFile, transformContents, transformElement, write, write, writeStream

Methods inherited from class java.lang.Object

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

Field Detail

head

private RewriteRegion head

tail

private RewriteRegion tail

file

private java.io.File file

closed

private boolean closed

PLACEHOLDER

static final java.lang.String PLACEHOLDER

BUFFER_SIZE

static final int BUFFER_SIZE

Constructor Detail

RewritableLinkTransformer

public RewritableLinkTransformer(java.lang.String filename)
                          throws java.io.IOException

Make a RewritableLinkTransformer.

Parameters:

filename - Filename to write to

Method Detail

close

public void close()
           throws java.io.IOException

Description copied from class: HTMLTransformer

Close the transformer. Flushes all buffered data to disk by calling flush(). This call may be time-consuming! Don't use the transformer again after closing it.

Overrides:

close in class HTMLTransformer

Following copied from class: websphinx.HTMLTransformer

Throws:

java.io.IOException - if an I/O error occurs

handleLink

protected void handleLink(Link link)
                   throws java.io.IOException

Description copied from class: LinkTransformer

Handle a Link's transformation. Default implementation replaces the link's URL with lookup(URL).

Overrides:

handleLink in class LinkTransformer

Following copied from class: websphinx.LinkTransformer

Parameters:

link - Link to transform

addURL

private RewriteRegion addURL(java.net.URL url,
                             long offset,
                             int len)

rewrite

public void rewrite()
             throws java.io.IOException

Rewrite the file, remapping all the URLs according to their current values from lookup().