Java Doc for ImageReader.java in  » Content-Management-System » apache-lenya-2.0 » org » apache » cocoon » reading » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Content Management System » apache lenya 2.0 » org.apache.cocoon.reading 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.apache.cocoon.reading.AbstractReader
   org.apache.cocoon.reading.ResourceReader
      org.apache.cocoon.reading.ImageReader

ImageReader
final public class ImageReader extends ResourceReader (Code)
The ImageReader component is used to serve binary image data in a sitemap pipeline. It makes use of HTTP Headers to determine if the requested resource should be written to the OutputStream or if it can signal that it hasn't changed. Parameters:
<width>
This parameter is optional. When specified, it determines the width of the binary image. If no height parameter is specified, the aspect ratio of the image is kept. The parameter may be expressed as an int or a percentage.
<height>
This parameter is optional. When specified, it determines the height of the binary image. If no width parameter is specified, the aspect ratio of the image is kept. The parameter may be expressed as an int or a percentage.
<scale(Red|Green|Blue)>
This parameter is optional. When specified it will cause the specified color component in the image to be multiplied by the specified floating point value.
<offset(Red|Green|Blue)>
This parameter is optional. When specified it will cause the specified color component in the image to be incremented by the specified floating point value.
<grayscale>
This parameter is optional. When specified and set to true it will cause each image pixel to be normalized. Default is "false".
<allow-enlarging>
This parameter is optional. By default, if the image is smaller than the specified width and height, the image will be enlarged. In some circumstances this behaviour is undesirable, and can be switched off by setting this parameter to "false" so that images will be reduced in size, but not enlarged. The default is "true".
<quality>
This parameter is optional. By default, the quality uses the default for the JVM. If it is specified, the proper JPEG quality compression is used. The range is 0.0 to 1.0, if specified.

version:
   $Id: ImageReader.java 433543 2006-08-22 06:22:54Z crossley $




Method Summary
public  SerializablegetKey()
     Generate the unique key.
protected  voidprocessStream(InputStream inputStream)
    
protected  byte[]readFully(InputStream in)
    
public  voidrecycle()
    
public  voidsetup(SourceResolver resolver, Map objectModel, String src, Parameters par)
    
protected  voidsetupHeaders()
    



Method Detail
getKey
public Serializable getKey()(Code)
Generate the unique key. This key must be unique inside the space of this component. The generated key consists of the src and width and height,and the color transform parameters



processStream
protected void processStream(InputStream inputStream) throws IOException, ProcessingException(Code)



readFully
protected byte[] readFully(InputStream in) throws IOException(Code)



recycle
public void recycle()(Code)



setup
public void setup(SourceResolver resolver, Map objectModel, String src, Parameters par) throws ProcessingException, SAXException, IOException(Code)



setupHeaders
protected void setupHeaders()(Code)



Fields inherited from org.apache.cocoon.reading.ResourceReader
protected int bufferSize(Code)(Java Doc)
protected boolean byteRanges(Code)(Java Doc)
protected int configuredBufferSize(Code)(Java Doc)
protected boolean configuredByteRanges(Code)(Java Doc)
protected long configuredExpires(Code)(Java Doc)
protected boolean configuredQuickTest(Code)(Java Doc)
protected long expires(Code)(Java Doc)
protected Source inputSource(Code)(Java Doc)
protected boolean quickTest(Code)(Java Doc)
protected Request request(Code)(Java Doc)
protected Response response(Code)(Java Doc)

Methods inherited from org.apache.cocoon.reading.ResourceReader
public void configure(Configuration configuration) throws ConfigurationException(Code)(Java Doc)
public void generate() throws IOException, ProcessingException(Code)(Java Doc)
public Serializable getKey()(Code)(Java Doc)
public long getLastModified()(Code)(Java Doc)
public String getMimeType()(Code)(Java Doc)
public SourceValidity getValidity()(Code)(Java Doc)
protected boolean hasRanges()(Code)(Java Doc)
public void parameterize(Parameters parameters) throws ParameterException(Code)(Java Doc)
protected void processStream(InputStream inputStream) throws IOException, ProcessingException(Code)(Java Doc)
public void recycle()(Code)(Java Doc)
public void setup(SourceResolver resolver, Map objectModel, String src, Parameters par) throws ProcessingException, SAXException, IOException(Code)(Java Doc)
protected void setupHeaders()(Code)(Java Doc)

Fields inherited from org.apache.cocoon.reading.AbstractReader
protected Map objectModel(Code)(Java Doc)
protected OutputStream out(Code)(Java Doc)
protected Parameters parameters(Code)(Java Doc)
protected SourceResolver resolver(Code)(Java Doc)
protected String source(Code)(Java Doc)

Methods inherited from org.apache.cocoon.reading.AbstractReader
public long getLastModified()(Code)(Java Doc)
public String getMimeType()(Code)(Java Doc)
public void recycle()(Code)(Java Doc)
public void setOutputStream(OutputStream out)(Code)(Java Doc)
public void setup(SourceResolver resolver, Map objectModel, String src, Parameters par) throws ProcessingException, SAXException, IOException(Code)(Java Doc)
public boolean shouldSetContentLength()(Code)(Java Doc)

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