Class PnmImageParser

java.lang.Object

org.apache.commons.imaging.common.BinaryFileParser

org.apache.commons.imaging.AbstractImageParser<PnmImagingParameters>

org.apache.commons.imaging.formats.pnm.PnmImageParser

public class PnmImageParser
extends AbstractImageParser<PnmImagingParameters>

Field Summary

Fields

Modifier and Type	Field	Description
private static final String[]	ACCEPTED_EXTENSIONS
private static final String	DEFAULT_EXTENSION
private static final int	DPI
private static final ImageFormat[]	IMAGE_FORMATS
private static final String	TOKEN_DEPTH
private static final String	TOKEN_ENDHDR
private static final String	TOKEN_HEIGHT
private static final String	TOKEN_MAXVAL
private static final String	TOKEN_TUPLTYPE
private static final String	TOKEN_WIDTH

Constructor Summary

Constructors

Constructor	Description
PnmImageParser()	Constructs a new instance with the little-endian byte order.

Method Summary

Modifier and Type	Method	Description
private void	check(boolean value, String type)
private void	checkFound(int value, String type)
private String	checkNextTokens(StringTokenizer tokenizer, String type)
private int	checkNextTokensAsInt(StringTokenizer tokenizer, String type)
boolean	dumpImageFile(PrintWriter pw, ByteSource byteSource)	Writes the ImageInfo and format-specific information for the image content of the specified byte source to a PrintWriter
protected String[]	getAcceptedExtensions()	Gets an array of all accepted extensions
protected ImageFormat[]	getAcceptedTypes()	Gets an array of ImageFormat objects describing all accepted types
BufferedImage	getBufferedImage(ByteSource byteSource, PnmImagingParameters params)	Gets a buffered image specified by the byte source (for sources that specify multiple images, choice of which image is returned is implementation dependent).
String	getDefaultExtension()	Gets the default extension for the format specified by an implementation of ImageParser.
PnmImagingParameters	getDefaultParameters()	Gets a default parameters instance for this parser.
byte[]	getIccProfileBytes(ByteSource byteSource, PnmImagingParameters params)	Gets an array of bytes describing the International Color Consortium (ICC) specification for the color space of the image contained in the input byteSource.
ImageInfo	getImageInfo(ByteSource byteSource, PnmImagingParameters params)	Gets image information from the specified ByteSource.
Dimension	getImageSize(ByteSource byteSource, PnmImagingParameters params)	Gets the size of the image described by the specified ByteSource.
ImageMetadata	getMetadata(ByteSource byteSource, PnmImagingParameters params)	Gets image metadata from the specified byte source.
String	getName()	Gets a descriptive name for the implementation of an ImageParser.
private AbstractFileInfo	readHeader(InputStream inputStream)
private AbstractFileInfo	readHeader(ByteSource byteSource)
void	writeImage(BufferedImage src, OutputStream os, PnmImagingParameters params)	Writes the content of a BufferedImage to the specified output stream.

Methods inherited from class AbstractImageParser

canAcceptExtension, canAcceptExtension, canAcceptType, dumpImageFile, dumpImageFile, dumpImageFile, getAllBufferedImages, getAllBufferedImages, getAllBufferedImages, getAllImageParsers, getBufferedImage, getBufferedImage, getBufferedImageFactory, getFormatCompliance, getFormatCompliance, getFormatCompliance, getIccProfileBytes, getIccProfileBytes, getIccProfileBytes, getIccProfileBytes, getImageInfo, getImageInfo, getImageInfo, getImageSize, getImageSize, getImageSize, getImageSize, getMetadata, getMetadata, getMetadata, getMetadata, getMetadata

Methods inherited from class BinaryFileParser

debugNumber, debugNumber, getByteOrder, setByteOrder

Methods inherited from class Object

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

Field Details

TOKEN_ENDHDR

private static final String TOKEN_ENDHDR

See Also:

• Constant Field Values

TOKEN_TUPLTYPE

private static final String TOKEN_TUPLTYPE

See Also:

• Constant Field Values

TOKEN_MAXVAL

private static final String TOKEN_MAXVAL

See Also:

• Constant Field Values

TOKEN_DEPTH

private static final String TOKEN_DEPTH

See Also:

• Constant Field Values

TOKEN_HEIGHT

private static final String TOKEN_HEIGHT

See Also:

• Constant Field Values

TOKEN_WIDTH

private static final String TOKEN_WIDTH

See Also:

• Constant Field Values

DPI

private static final int DPI

See Also:

• Constant Field Values

IMAGE_FORMATS

private static final ImageFormat[] IMAGE_FORMATS

DEFAULT_EXTENSION

private static final String DEFAULT_EXTENSION

ACCEPTED_EXTENSIONS

private static final String[] ACCEPTED_EXTENSIONS

Constructor Details

PnmImageParser

public PnmImageParser()

Constructs a new instance with the little-endian byte order.

Method Details

check

private void check(boolean value,
 String type)
            throws ImagingException

Throws:

ImagingException

checkFound

private void checkFound(int value,
 String type)
                 throws ImagingException

Throws:

ImagingException

checkNextTokens

private String checkNextTokens(StringTokenizer tokenizer,
 String type)
                        throws ImagingException

Throws:

ImagingException

checkNextTokensAsInt

private int checkNextTokensAsInt(StringTokenizer tokenizer,
 String type)
                          throws ImagingException

Throws:

ImagingException

dumpImageFile

public boolean dumpImageFile(PrintWriter pw,
 ByteSource byteSource)
                      throws ImagingException,
IOException

Description copied from class: AbstractImageParser

Writes the ImageInfo and format-specific information for the image content of the specified byte source to a PrintWriter

Overrides:

dumpImageFile in class AbstractImageParser<PnmImagingParameters>

Parameters:

pw - print writer used for writing the ImageInfo

byteSource - A valid byte source.

Returns:

A valid PrintWriter.

Throws:

ImagingException - In the event that the specified content does not conform to the format of the specific parser implementation.

IOException - In the event of unsuccessful read or access operation.

getAcceptedExtensions

protected String[] getAcceptedExtensions()

Description copied from class: AbstractImageParser

Gets an array of all accepted extensions

Specified by:

getAcceptedExtensions in class AbstractImageParser<PnmImagingParameters>

Returns:

A valid array of one or more elements.

getAcceptedTypes

protected ImageFormat[] getAcceptedTypes()

Description copied from class: AbstractImageParser

Gets an array of ImageFormat objects describing all accepted types

Specified by:

getAcceptedTypes in class AbstractImageParser<PnmImagingParameters>

Returns:

A valid array of one or more elements.

getBufferedImage

public BufferedImage getBufferedImage(ByteSource byteSource,
 PnmImagingParameters params)
                               throws ImagingException,
IOException

Description copied from class: AbstractImageParser

Gets a buffered image specified by the byte source (for sources that specify multiple images, choice of which image is returned is implementation dependent).

Specified by:

getBufferedImage in class AbstractImageParser<PnmImagingParameters>

Parameters:

byteSource - A valid instance of ByteSource

params - Optional instructions for special-handling or interpretation of the input data (null objects are permitted and must be supported by implementations).

Returns:

A valid instance of BufferedImage.

Throws:

ImagingException - In the event that the specified content does not conform to the format of the specific parser implementation.

IOException - In the event of unsuccessful read or access operation.

getDefaultExtension

public String getDefaultExtension()

Description copied from class: AbstractImageParser

Gets the default extension for the format specified by an implementation of ImageParser. Some parsers can support more than one extension (i.e. .JPEG, .JPG; .TIF, .TIFF, etc.).

Specified by:

getDefaultExtension in class AbstractImageParser<PnmImagingParameters>

Returns:

A valid string.

getDefaultParameters

public PnmImagingParameters getDefaultParameters()

Description copied from class: AbstractImageParser

Gets a default parameters instance for this parser.

Specified by:

getDefaultParameters in class AbstractImageParser<PnmImagingParameters>

Returns:

default parameters instance

getIccProfileBytes

public byte[] getIccProfileBytes(ByteSource byteSource,
 PnmImagingParameters params)
                          throws ImagingException,
IOException

Description copied from class: AbstractImageParser

Gets an array of bytes describing the International Color Consortium (ICC) specification for the color space of the image contained in the input byteSource. Not all formats support ICC profiles.

Specified by:

getIccProfileBytes in class AbstractImageParser<PnmImagingParameters>

Parameters:

byteSource - A valid ByteSource.

params - Optional instructions for special-handling or interpretation of the input data.

Returns:

If available, a valid array of bytes; otherwise, a null

Throws:

ImagingException - In the event that the specified content does not conform to the format of the specific parser implementation.

IOException - In the event of unsuccessful read or access operation.

getImageInfo

public ImageInfo getImageInfo(ByteSource byteSource,
 PnmImagingParameters params)
                       throws ImagingException,
IOException

Description copied from class: AbstractImageParser

Gets image information from the specified ByteSource. Format-specific ImageParser implementations are expected to return a valid ImageInfo object or to throw an ImageReadException if unable to process the specified data.

The params argument provides a mechanism for individual implementations to pass optional information into the parser. Not all formats will require this capability. Because the base class may call this method with a null params argument, implementations should always include logic for ignoring null input.

Specified by:

getImageInfo in class AbstractImageParser<PnmImagingParameters>

Parameters:

byteSource - A valid ByteSource object

params - Optional instructions for special-handling or interpretation of the input data (null objects are permitted and must be supported by implementations).

Returns:

A valid image information object describing the content extracted from the specified data.

Throws:

ImagingException - In the event that the specified content does not conform to the format of the specific parser implementation.

IOException - In the event of unsuccessful data access operation.

getImageSize

public Dimension getImageSize(ByteSource byteSource,
 PnmImagingParameters params)
                       throws ImagingException,
IOException

Description copied from class: AbstractImageParser

Gets the size of the image described by the specified ByteSource.

Specified by:

getImageSize in class AbstractImageParser<PnmImagingParameters>

Parameters:

byteSource - A valid reference to a ByteSource.

params - Optional instructions for special-handling or interpretation of the input data.

Returns:

A valid instance of Dimension.

Throws:

ImagingException - In the event that the specified content does not conform to the format of the specific parser implementation.

IOException - In the event of unsuccessful read or access operation.

getMetadata

public ImageMetadata getMetadata(ByteSource byteSource,
 PnmImagingParameters params)
                          throws ImagingException,
IOException

Description copied from class: AbstractImageParser

Gets image metadata from the specified byte source. Format-specific ImageParser implementations are expected to return a valid IImageMetadata object or to throw an ImageReadException if unable to process the specified byte source.

The params argument provides a mechanism for individual implementations to pass optional information into the parser. Not all formats will require this capability. Because the base class may call this method with a null params argument, implementations should always include logic for ignoring null input.

Specified by:

getMetadata in class AbstractImageParser<PnmImagingParameters>

Parameters:

byteSource - A valid byte source.

params - Optional instructions for special-handling or interpretation of the input data (null objects are permitted and must be supported by implementations).

Returns:

A valid, potentially subject-matter-specific implementation of the IImageMetadata interface describing the content extracted from the source content.

Throws:

ImagingException - In the event that the ByteSource content does not conform to the format of the specific parser implementation.

IOException - In the event of unsuccessful data read operation.

getName

public String getName()

Description copied from class: AbstractImageParser

Gets a descriptive name for the implementation of an ImageParser.

Specified by:

getName in class AbstractImageParser<PnmImagingParameters>

Returns:

a valid, subject-matter-specific string.

readHeader

private AbstractFileInfo readHeader(ByteSource byteSource)
                             throws ImagingException,
IOException

Throws:

ImagingException

IOException

readHeader

private AbstractFileInfo readHeader(InputStream inputStream)
                             throws ImagingException,
IOException

Throws:

ImagingException

IOException

writeImage

public void writeImage(BufferedImage src,
 OutputStream os,
 PnmImagingParameters params)
                throws ImagingException,
IOException

Description copied from class: AbstractImageParser

Writes the content of a BufferedImage to the specified output stream.

The params argument provides a mechanism for individual implementations to pass optional information into the parser. Not all formats will support this capability. Currently, some of the parsers do not check for null arguments.

Overrides:

writeImage in class AbstractImageParser<PnmImagingParameters>

Parameters:

src - An image giving the source content for output

os - A valid output stream for storing the formatted image

params - optional parameters, defining format-specific instructions for output (such as selections for data compression, color models, etc.)

Throws:

ImagingException - In the event that the output format cannot handle the input image or invalid params are specified.

IOException - In the event of an write error from the output stream.