Package org.ametys.core.util.cocoon

Class AbstractResourceReader

java.lang.Object

org.apache.avalon.framework.logger.AbstractLogEnabled

org.apache.cocoon.reading.AbstractReader

org.ametys.core.util.cocoon.AbstractResourceReader

All Implemented Interfaces:

Poolable, Recyclable, Component, LogEnabled, Reader, SitemapModelComponent, SitemapOutputComponent

Direct Known Subclasses:

AmetysResourceReader, FileReader, UploadReader

public abstract class AbstractResourceReader
extends AbstractReader

Abstract reader for Ametys resources. If the resource is an image, this reader handles resizing and cropping.

Field Summary

Fields

Modifier and Type	Field	Description
protected static Collection<String>	__ALLOWED_OUTPUT_FORMATS	List of allowed output formats
protected static String	__DEFAULT_FORMAT	Default returned format
protected static Collection<String>	__UNRESIZABLE_FORMATS	List of format that cannot be resized
private int	_cropHeight
private int	_cropWidth
private int	_height
private int	_maxHeight
private int	_maxWidth
private boolean	_readForDownload
private int	_width

Fields inherited from class org.apache.cocoon.reading.AbstractReader

objectModel, out, parameters, resolver, source

Fields inherited from interface org.apache.cocoon.reading.Reader

ROLE

Constructor Summary

Constructors

Constructor	Description
AbstractResourceReader()

Method Summary

Modifier and Type	Method	Description
protected abstract void	doSetup(SourceResolver res, Map objModel, String src, Parameters par)	Called by setup(SourceResolver, Map, String, Parameters).
void	generate()
protected void	generateThumbnail(InputStream is, String format)	Generate the thumbnail in OutputStream out
protected abstract String	getEncodedFilename()	If needed, returns the resource's name, properly encoded for using in a "Content-Disposition" HTTP header. May be null, in which case the result of getFilename() is used instead.
protected abstract String	getFilename()	Returns the resource's name.
protected abstract InputStream	getInputStream()	Returns the resource's InputStream.
protected String	getKeySuffix()	Helper method to compute a suffix based on resizing and cropping properties.
protected abstract long	getLength()	Returns the resource's length.
protected boolean	processImage(String fileExtension)	Determines if the file is an image and should be processed.
void	setup(SourceResolver sresolver, Map sObjectModel, String src, Parameters par)

Methods inherited from class org.apache.cocoon.reading.AbstractReader

getLastModified, getMimeType, recycle, setOutputStream, shouldSetContentLength

Methods inherited from class org.apache.avalon.framework.logger.AbstractLogEnabled

enableLogging, getLogger, setupLogger, setupLogger, setupLogger

Methods inherited from class java.lang.Object

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

Field Detail

__DEFAULT_FORMAT

protected static final String __DEFAULT_FORMAT

Default returned format

See Also:

Constant Field Values

__ALLOWED_OUTPUT_FORMATS

protected static final Collection<String> __ALLOWED_OUTPUT_FORMATS

List of allowed output formats

__UNRESIZABLE_FORMATS

protected static final Collection<String> __UNRESIZABLE_FORMATS

List of format that cannot be resized

_width

private int _width

_height

private int _height

_maxWidth

private int _maxWidth

_maxHeight

private int _maxHeight

_cropWidth

private int _cropWidth

_cropHeight

private int _cropHeight

_readForDownload

private boolean _readForDownload

Constructor Detail

AbstractResourceReader

public AbstractResourceReader()

Method Detail

setup

public void setup(SourceResolver sresolver,
                  Map sObjectModel,
                  String src,
                  Parameters par)
           throws ProcessingException,
                  SAXException,
                  IOException

Specified by:

setup in interface SitemapModelComponent

Overrides:

setup in class AbstractReader

Throws:

ProcessingException

SAXException

IOException

doSetup

protected abstract void doSetup(SourceResolver res,
                                Map objModel,
                                String src,
                                Parameters par)
                         throws ProcessingException,
                                IOException

Called by setup(SourceResolver, Map, String, Parameters). This method should be implemented by subclasses to retrieve the actual resource.

Parameters:

res - the SourceResolver.

objModel - the Cocoon's object model.

src - the source, as given by the sitemap.

par - the parameters, as given by the sitemap.

Throws:

ProcessingException - if an error occurs while processing the resource.

IOException - if an error occurs while accessing the resource.

generate

public void generate()
              throws IOException,
                     SAXException,
                     ProcessingException

Throws:

IOException

SAXException

ProcessingException

generateThumbnail

protected void generateThumbnail(InputStream is,
                                 String format)
                          throws IOException

Generate the thumbnail in OutputStream out

Parameters:

is - original image

format - format of the file

Throws:

IOException - if an error occurs when manipulating streams.

getInputStream

protected abstract InputStream getInputStream()

Returns the resource's InputStream.

Returns:

the resource's InputStream.

getFilename

protected abstract String getFilename()

Returns the resource's name.

Returns:

the resource's name.

getEncodedFilename

protected abstract String getEncodedFilename()

If needed, returns the resource's name, properly encoded for using in a "Content-Disposition" HTTP header.
May be null, in which case the result of getFilename() is used instead.

Returns:

the encoded resource's name, if any.

getLength

protected abstract long getLength()

Returns the resource's length.

Returns:

the resource's length.

processImage

protected boolean processImage(String fileExtension)

Determines if the file is an image and should be processed.

Parameters:

fileExtension - The file extension to process

Returns:

true if file is a image

getKeySuffix

protected String getKeySuffix()

Helper method to compute a suffix based on resizing and cropping properties.

Returns:

a String to be used in cache keys.