com.drew.metadata.exif
Class ExifThumbnailDirectory

java.lang.Object
  com.drew.metadata.Directory
      com.drew.metadata.exif.ExifThumbnailDirectory

public class ExifThumbnailDirectory
extends Directory

One of several Exif directories. Otherwise known as IFD1, this directory holds information about an embedded thumbnail image.

Author:

Drew Noakes http://drewnoakes.com

Field Summary

protected static HashMap<Integer,String>	_tagNameMap
static int	TAG_BITS_PER_SAMPLE When image format is no compression, this value shows the number of bits per component for each pixel.
static int	TAG_ORIENTATION
static int	TAG_PHOTOMETRIC_INTERPRETATION Shows the color space of the image data components.
static int	TAG_PLANAR_CONFIGURATION
static int	TAG_REFERENCE_BLACK_WHITE
static int	TAG_RESOLUTION_UNIT
static int	TAG_ROWS_PER_STRIP The raster is codified by a single block of data holding this many rows.
static int	TAG_SAMPLES_PER_PIXEL Each pixel is composed of this many samples.
static int	TAG_STRIP_BYTE_COUNTS The size of the raster data in bytes.
static int	TAG_STRIP_OFFSETS The position in the file of raster data.
static int	TAG_THUMBNAIL_COMPRESSION Shows compression method for Thumbnail.
static int	TAG_THUMBNAIL_IMAGE_HEIGHT
static int	TAG_THUMBNAIL_IMAGE_WIDTH
static int	TAG_THUMBNAIL_LENGTH The size of the thumbnail image data in bytes.
static int	TAG_THUMBNAIL_OFFSET The offset to thumbnail image bytes.
static int	TAG_X_RESOLUTION When image format is no compression YCbCr, this value shows byte aligns of YCbCr data.
static int	TAG_Y_RESOLUTION
static int	TAG_YCBCR_COEFFICIENTS
static int	TAG_YCBCR_POSITIONING
static int	TAG_YCBCR_SUBSAMPLING

Fields inherited from class com.drew.metadata.Directory

_definedTagList, _descriptor, _tagMap

Constructor Summary

ExifThumbnailDirectory()

Method Summary

String	getName() Provides the name of the directory, for display purposes.
protected HashMap<Integer,String>	getTagNameMap() Provides the map of tag names, hashed by tag type identifier.
byte[]	getThumbnailData()
boolean	hasThumbnailData()
void	setThumbnailData(byte[] data)
void	writeThumbnail(String filename)

Methods inherited from class com.drew.metadata.Directory

addError, containsTag, getBoolean, getBooleanObject, getByteArray, getDate, getDate, getDescription, getDouble, getDoubleObject, getErrorCount, getErrors, getFloat, getFloatObject, getInt, getIntArray, getInteger, getLong, getLongObject, getObject, getRational, getRationalArray, getString, getString, getStringArray, getTagCount, getTagName, getTags, hasErrors, setBoolean, setByteArray, setDate, setDescriptor, setDouble, setDoubleArray, setFloat, setFloatArray, setInt, setIntArray, setLong, setObject, setObjectArray, setRational, setRationalArray, setString, setStringArray

Methods inherited from class java.lang.Object

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

Field Detail

TAG_THUMBNAIL_IMAGE_WIDTH

public static final int TAG_THUMBNAIL_IMAGE_WIDTH

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Constant Field Values

TAG_THUMBNAIL_IMAGE_HEIGHT

public static final int TAG_THUMBNAIL_IMAGE_HEIGHT

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Constant Field Values

TAG_BITS_PER_SAMPLE

public static final int TAG_BITS_PER_SAMPLE

When image format is no compression, this value shows the number of bits per component for each pixel. Usually this value is '8,8,8'.

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Constant Field Values

TAG_THUMBNAIL_COMPRESSION

public static final int TAG_THUMBNAIL_COMPRESSION

Shows compression method for Thumbnail. 1 = Uncompressed 2 = CCITT 1D 3 = T4/Group 3 Fax 4 = T6/Group 4 Fax 5 = LZW 6 = JPEG (old-style) 7 = JPEG 8 = Adobe Deflate 9 = JBIG B&W 10 = JBIG Color 32766 = Next 32771 = CCIRLEW 32773 = PackBits 32809 = Thunderscan 32895 = IT8CTPAD 32896 = IT8LW 32897 = IT8MP 32898 = IT8BL 32908 = PixarFilm 32909 = PixarLog 32946 = Deflate 32947 = DCS 34661 = JBIG 34676 = SGILog 34677 = SGILog24 34712 = JPEG 2000 34713 = Nikon NEF Compressed

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Constant Field Values

TAG_PHOTOMETRIC_INTERPRETATION

public static final int TAG_PHOTOMETRIC_INTERPRETATION

Shows the color space of the image data components. 0 = WhiteIsZero 1 = BlackIsZero 2 = RGB 3 = RGB Palette 4 = Transparency Mask 5 = CMYK 6 = YCbCr 8 = CIELab 9 = ICCLab 10 = ITULab 32803 = Color Filter Array 32844 = Pixar LogL 32845 = Pixar LogLuv 34892 = Linear Raw

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Constant Field Values

TAG_STRIP_OFFSETS

public static final int TAG_STRIP_OFFSETS

The position in the file of raster data.

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Constant Field Values

TAG_ORIENTATION

public static final int TAG_ORIENTATION

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Constant Field Values

TAG_SAMPLES_PER_PIXEL

public static final int TAG_SAMPLES_PER_PIXEL

Each pixel is composed of this many samples.

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Constant Field Values

TAG_ROWS_PER_STRIP

public static final int TAG_ROWS_PER_STRIP

The raster is codified by a single block of data holding this many rows.

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Constant Field Values

TAG_STRIP_BYTE_COUNTS

public static final int TAG_STRIP_BYTE_COUNTS

The size of the raster data in bytes.

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Constant Field Values

TAG_X_RESOLUTION

public static final int TAG_X_RESOLUTION

When image format is no compression YCbCr, this value shows byte aligns of YCbCr data. If value is '1', Y/Cb/Cr value is chunky format, contiguous for each subsampling pixel. If value is '2', Y/Cb/Cr value is separated and stored to Y plane/Cb plane/Cr plane format.

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Constant Field Values

TAG_Y_RESOLUTION

public static final int TAG_Y_RESOLUTION

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Constant Field Values

TAG_PLANAR_CONFIGURATION

public static final int TAG_PLANAR_CONFIGURATION

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Constant Field Values

TAG_RESOLUTION_UNIT

public static final int TAG_RESOLUTION_UNIT

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Constant Field Values

TAG_THUMBNAIL_OFFSET

public static final int TAG_THUMBNAIL_OFFSET

The offset to thumbnail image bytes.

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Constant Field Values

TAG_THUMBNAIL_LENGTH

public static final int TAG_THUMBNAIL_LENGTH

The size of the thumbnail image data in bytes.

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Constant Field Values

TAG_YCBCR_COEFFICIENTS

public static final int TAG_YCBCR_COEFFICIENTS

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Constant Field Values

TAG_YCBCR_SUBSAMPLING

public static final int TAG_YCBCR_SUBSAMPLING

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Constant Field Values

TAG_YCBCR_POSITIONING

public static final int TAG_YCBCR_POSITIONING

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Constant Field Values

TAG_REFERENCE_BLACK_WHITE

public static final int TAG_REFERENCE_BLACK_WHITE

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Constant Field Values

_tagNameMap

protected static final HashMap<Integer,String> _tagNameMap

Constructor Detail

ExifThumbnailDirectory

public ExifThumbnailDirectory()

Method Detail

getName

public String getName()

Description copied from class: Directory

Provides the name of the directory, for display purposes. E.g. Exif

Specified by:

getName in class Directory

Returns:

the name of the directory

getTagNameMap

protected HashMap<Integer,String> getTagNameMap()

Description copied from class: Directory

Provides the map of tag names, hashed by tag type identifier.

Specified by:

getTagNameMap in class Directory

Returns:

the map of tag names

hasThumbnailData

public boolean hasThumbnailData()

getThumbnailData

public byte[] getThumbnailData()

setThumbnailData

public void setThumbnailData(byte[] data)

writeThumbnail

public void writeThumbnail(String filename)
                    throws MetadataException,
                           IOException

Throws:

MetadataException

IOException