com.goldencode.p2j.ui

Class ImageExtractor.ImageReaderAdapter

java.lang.Object

com.goldencode.p2j.ui.ImageExtractor.ImageReaderAdapter

All Implemented Interfaces:

ImageExtractor.ImageReader

Enclosing class:

ImageExtractor

public static class ImageExtractor.ImageReaderAdapter
extends java.lang.Object
implements ImageExtractor.ImageReader

Adapts image readers to read different image types from the common data source.

Field Summary

Fields

Modifier and Type	Field and Description
private ImageExtractor.ImageReader	currentImageReader The current image reader
private java.util.List<ImageExtractor.ImageReader>	imageReaders The list of readers
private int	index The current image index

Constructor Summary

Constructors

Constructor and Description
ImageReaderAdapter(java.util.List<ImageExtractor.ImageReader> imageReaders) Builds this image reader excepting the given image reader list as its parameter.

Method Summary

Modifier and Type	Method and Description
byte[]	getImageData() Returns the binary image data.
java.lang.String	getImageFileExtension() Returns the file image standard extension.
int	getImageIndex() Returns the current image count as its index value, a 1-based index.
boolean	nextImage(java.io.RandomAccessFile raf) Extracts a first available image data starting from the current file offset.

Methods inherited from class java.lang.Object

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

Field Detail

imageReaders

private final java.util.List<ImageExtractor.ImageReader> imageReaders

The list of readers

index

private int index

The current image index

currentImageReader

private ImageExtractor.ImageReader currentImageReader

The current image reader

Constructor Detail

ImageReaderAdapter

public ImageReaderAdapter(java.util.List<ImageExtractor.ImageReader> imageReaders)

Builds this image reader excepting the given image reader list as its parameter.

Parameters:

imageReaders - The image reader list

Method Detail

nextImage

public boolean nextImage(java.io.RandomAccessFile raf)
                  throws java.io.IOException

Extracts a first available image data starting from the current file offset. It scans the given stream looking for the first occurrence of the target binary data and stores the binary in its internal state and returns true immediately after the first occurrence of the target image has been found, otherwise it returns false and shifts the current position one more toward the end of the given stream.

Specified by:

nextImage in interface ImageExtractor.ImageReader

Parameters:

raf - The data represented by the random access file

Returns:

True iff the target image has been read successfully and stored in its internal state, otherwise false.

Throws:

java.io.IOException - If IO error occurs during reading data and moving the current pointer operations.

getImageData

public byte[] getImageData()

Returns the binary image data.

Specified by:

getImageData in interface ImageExtractor.ImageReader

Returns:

The binary image data

getImageIndex

public int getImageIndex()

Returns the current image count as its index value, a 1-based index.

Specified by:

getImageIndex in interface ImageExtractor.ImageReader

Returns:

The image index

getImageFileExtension

public java.lang.String getImageFileExtension()

Returns the file image standard extension.

Specified by:

getImageFileExtension in interface ImageExtractor.ImageReader

Returns:

The file image standard extension.