Class ScalarDS
- java.lang.Object
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- ncsa.hdf.object.HObject
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- ncsa.hdf.object.Dataset
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- ncsa.hdf.object.ScalarDS
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- All Implemented Interfaces:
java.io.Serializable
,DataFormat
public abstract class ScalarDS extends Dataset
A scalar dataset is a multiple dimension array of scalar points. The Datatype of a scalar dataset must be an atomic datatype. Common datatypes of scalar datasets include char, byte, short, int, long, float, double and string.A ScalarDS can be an image or spreadsheet data. ScalarDS defines few methods to deal with both images and spreadsheets.
ScalarDS is an abstract class. Current implementing classes are the H4SDS, H5GRImage and H5ScalarDS.
- Version:
- 1.1 9/4/2007
- Author:
- Peter X. Cao
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description protected java.lang.Object
fillValue
The fill value of the dataset.protected double[]
imageDataRange
The min-max range of image data values.protected int
interlace
The interlace mode of the stored raster image data.static int
INTERLACE_LINE
Indicates that each pixel component of RGB is stored as a scan line.static int
INTERLACE_PIXEL
Indicates that the pixel RGB values are contiguous.static int
INTERLACE_PLANE
Indicates that each pixel component of RGB is stored as a plane.protected boolean
isDefaultImageOrder
Flag to indicate if the dataset is displayed as an image with default order of dimensionsboolean
isFillValueConverted
Flag to indicate if the FillValue is converted from unsigned C.protected boolean
isImage
True if this dataset is an image.protected boolean
isImageDisplay
Flag to indicate if the dataset is displayed as an imageprotected boolean
isText
True if this dataset is ASCII text.protected boolean
isTrueColor
True if this dataset is a true color image.protected boolean
isUnsigned
Flag to indicate if the original C data is unsigned integer.protected byte[][]
palette
The indexed RGB color model with 256 colors.protected boolean
unsignedConverted
Flag to indicate is the original unsigned C data is converted.-
Fields inherited from class ncsa.hdf.object.Dataset
chunkSize, compression, compression_gzip_txt, convertByteToString, convertedBuf, data, datatype, dimNames, dims, enumConverted, filters, isDataLoaded, maxDims, nPoints, originalBuf, rank, selectedDims, selectedIndex, selectedStride, startDims, storage
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Fields inherited from class ncsa.hdf.object.HObject
fileFormat, linkTargetObjName, oid, separator
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Constructor Summary
Constructors Constructor Description ScalarDS(FileFormat theFile, java.lang.String theName, java.lang.String thePath)
Constructs an instance of a ScalarDS with specific name and path.ScalarDS(FileFormat theFile, java.lang.String theName, java.lang.String thePath, long[] oid)
Deprecated.Not for public use in the future.
UsingScalarDS(FileFormat, String, String)
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description void
addFilteredImageValue(java.lang.Number x)
Add a value that will be filtered out in imagevoid
clearData()
Clears the data buffer in memory and to force the next read() to load data from file.java.lang.Object
convertFromUnsignedC()
Converts the data values of this dataset to appropriate Java integer if they are unsigned integers.java.lang.Object
convertToUnsignedC()
Converts Java integer data of this dataset back to unsigned C-type integer data if they are unsigned integers.java.lang.Object
getFillValue()
Returns the fill values for the dataset.java.util.List<java.lang.Number>
getFilteredImageValues()
get a list of values that will be filtered out in imagedouble[]
getImageDataRange()
Returns the (min, max) pair of image data range.int
getInterlace()
Returns the interlace mode of a true color image (RGB).abstract byte[][]
getPalette()
Returns the palette of this scalar dataset or null if palette does not exist.java.lang.String
getPaletteName(int idx)
Get the name of a specific image palette from file.abstract byte[]
getPaletteRefs()
Returns the byte array of palette refs.boolean
isDefaultImageOrder()
Returns true if this dataset is displayed as an image with default image order.boolean
isImage()
Returns true if this dataset is an image.boolean
isImageDisplay()
Returns true if this dataset is displayed as an image.boolean
isText()
Returns true if this dataset is ASCII text.boolean
isTrueColor()
Returns true if this dataset is a true color image.boolean
isUnsigned()
Returns true if the original C data are unsigned integers.abstract byte[][]
readPalette(int idx)
Reads a specific image palette from file.void
setImageDataRange(double min, double max)
Sets data range for an image.void
setIsImage(boolean b)
Sets the flag to indicate this dataset is an image.void
setIsImageDisplay(boolean b)
Sets the flag to display the dataset as an image.void
setPalette(byte[][] pal)
Sets the palette for this dataset.-
Methods inherited from class ncsa.hdf.object.Dataset
byteToString, clear, convertFromUnsignedC, convertFromUnsignedC, convertToUnsignedC, convertToUnsignedC, copy, getChunkSize, getCompression, getConvertByteToString, getData, getDatatype, getDimNames, getDims, getFilters, getHeight, getMaxDims, getOriginalClass, getRank, getSelectedDims, getSelectedIndex, getSize, getStartDims, getStorage, getStride, getWidth, init, isEnumConverted, isString, read, readBytes, setConvertByteToString, setData, setEnumConverted, stringToByte, write, write
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Methods inherited from class ncsa.hdf.object.HObject
close, debug, equalsOID, getFID, getFile, getFileFormat, getFullName, getLinkTargetObjName, getName, getOID, getPath, open, setLinkTargetObjName, setName, setPath, toString
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods inherited from interface ncsa.hdf.object.DataFormat
getMetadata, hasAttribute, removeMetadata, updateMetadata, writeMetadata
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Field Detail
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INTERLACE_PIXEL
public static final int INTERLACE_PIXEL
Indicates that the pixel RGB values are contiguous.- See Also:
- Constant Field Values
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INTERLACE_LINE
public static final int INTERLACE_LINE
Indicates that each pixel component of RGB is stored as a scan line.- See Also:
- Constant Field Values
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INTERLACE_PLANE
public static final int INTERLACE_PLANE
Indicates that each pixel component of RGB is stored as a plane.- See Also:
- Constant Field Values
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interlace
protected int interlace
The interlace mode of the stored raster image data. Valid values are INTERLACE_PIXEL, INTERLACE_LINE and INTERLACE_PLANE.
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imageDataRange
protected double[] imageDataRange
The min-max range of image data values. For example, [0, 255] indicates the min is 0, and the max is 255.
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palette
protected byte[][] palette
The indexed RGB color model with 256 colors.The palette values are stored in a two-dimensional byte array and arrange by color components of red, green and blue. palette[][] = byte[3][256], where, palette[0][], palette[1][] and palette[2][] are the red, green and blue components respectively.
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isImage
protected boolean isImage
True if this dataset is an image.
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isTrueColor
protected boolean isTrueColor
True if this dataset is a true color image.
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isText
protected boolean isText
True if this dataset is ASCII text.
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isUnsigned
protected boolean isUnsigned
Flag to indicate if the original C data is unsigned integer.
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unsignedConverted
protected boolean unsignedConverted
Flag to indicate is the original unsigned C data is converted.
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fillValue
protected java.lang.Object fillValue
The fill value of the dataset.
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isImageDisplay
protected boolean isImageDisplay
Flag to indicate if the dataset is displayed as an image
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isDefaultImageOrder
protected boolean isDefaultImageOrder
Flag to indicate if the dataset is displayed as an image with default order of dimensions
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isFillValueConverted
public boolean isFillValueConverted
Flag to indicate if the FillValue is converted from unsigned C.
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Constructor Detail
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ScalarDS
public ScalarDS(FileFormat theFile, java.lang.String theName, java.lang.String thePath)
Constructs an instance of a ScalarDS with specific name and path. An HDF data object must have a name. The path is the group path starting from the root.For example, in H5ScalarDS(h5file, "dset", "/arrays/"), "dset" is the name of the dataset, "/arrays" is the group path of the dataset.
- Parameters:
theFile
- the file that contains the data object.theName
- the name of the data object, e.g. "dset".thePath
- the full path of the data object, e.g. "/arrays/".
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ScalarDS
@Deprecated public ScalarDS(FileFormat theFile, java.lang.String theName, java.lang.String thePath, long[] oid)
Deprecated.Not for public use in the future.
UsingScalarDS(FileFormat, String, String)
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Method Detail
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clearData
public void clearData()
Description copied from class:Dataset
Clears the data buffer in memory and to force the next read() to load data from file.The function read() loads data from file into memory only if the data is not read. If data is already in memory, read() just returns the memory buffer. Sometimes we want to force read() to re-read data from file. For example, when the selection is changed, we need to re-read the data. clearData() clears the current memory buffer and force the read() to load the data from file.
- Overrides:
clearData
in classDataset
- See Also:
Dataset.getData()
,Dataset.read()
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convertFromUnsignedC
public java.lang.Object convertFromUnsignedC()
Converts the data values of this dataset to appropriate Java integer if they are unsigned integers.- Returns:
- the converted data buffer.
- See Also:
Dataset.convertToUnsignedC(Object)
,Dataset.convertFromUnsignedC(Object, Object)
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convertToUnsignedC
public java.lang.Object convertToUnsignedC()
Converts Java integer data of this dataset back to unsigned C-type integer data if they are unsigned integers.- Returns:
- the converted data buffer.
- See Also:
Dataset.convertToUnsignedC(Object)
,Dataset.convertToUnsignedC(Object, Object)
,Dataset.convertFromUnsignedC(Object data_in)
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getPalette
public abstract byte[][] getPalette()
Returns the palette of this scalar dataset or null if palette does not exist.Scalar dataset can be displayed as spreadsheet data or image. When a scalar dataset is chosen to display as an image, the palette or color table may be needed to translate a pixel value to color components (for example, red, green, and blue). Some scalar datasets have no palette and some datasets have one or more than one palettes. If an associated palette exists but not loaded, this interface retrieves the palette from the file and returns the palette. If the palette is loaded, it returnd the palette. It returns null if there is no palette assciated with the dataset.
Current implementation only supports palette model of indexed RGB with 256 colors. Other models such as YUV", "CMY", "CMYK", "YCbCr", "HSV will be supported in the future.
The palette values are stored in a two-dimensional byte array and arrange by color components of red, green and blue. palette[][] = byte[3][256], where, palette[0][], palette[1][] and palette[2][] are the red, green and blue components respectively.
Sub-classes have to implement this interface. HDF4 and HDF5 images use different libraries to retrieve the associated palette.
- Returns:
- the 2D palette byte array.
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setPalette
public final void setPalette(byte[][] pal)
Sets the palette for this dataset.- Parameters:
pal
- the 2D palette byte array.
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readPalette
public abstract byte[][] readPalette(int idx)
Reads a specific image palette from file.A scalar dataset may have multiple palettes attached to it. readPalette(int idx) returns a specific palette identified by its index.
- Parameters:
idx
- the index of the palette to read.
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getPaletteName
public java.lang.String getPaletteName(int idx)
Get the name of a specific image palette from file.A scalar dataset may have multiple palettes attached to it. getPaletteName(int idx) returns the name of a specific palette identified by its index.
- Parameters:
idx
- the index of the palette to retrieve the name.- Returns:
- The name of the palette
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getPaletteRefs
public abstract byte[] getPaletteRefs()
Returns the byte array of palette refs.A palette reference is an object reference that points to the palette dataset.
For example, Dataset "Iceberg" has an attribute of object reference "Palette". The arrtibute "Palette" has value "2538" that is the object reference of the palette data set "Iceberg Palette".
- Returns:
- null if there is no palette attribute attached to this dataset.
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isImage
public final boolean isImage()
Returns true if this dataset is an image.For all Images, they must have an attribute called "CLASS". The value of this attribute is "IMAGE". For more details, read HDF5 Image and Palette Specification
- Returns:
- true if the dataset is an image; otherwise, returns false.
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isImageDisplay
public final boolean isImageDisplay()
Returns true if this dataset is displayed as an image.A ScalarDS can be displayed as an image or table.
- Returns:
- true if this dataset is displayed as an image; otherwise, returns false.
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isDefaultImageOrder
public final boolean isDefaultImageOrder()
Returns true if this dataset is displayed as an image with default image order.A ScalarDS can be displayed as an image with different orders of dimensions.
- Returns:
- true if this dataset is displayed as an image with default image order; otherwise, returns false.
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setIsImageDisplay
public final void setIsImageDisplay(boolean b)
Sets the flag to display the dataset as an image.- Parameters:
b
- if b is true, display the dataset as an image
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setIsImage
public final void setIsImage(boolean b)
Sets the flag to indicate this dataset is an image.- Parameters:
b
- if b is true, the dataset is an image.
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setImageDataRange
public final void setImageDataRange(double min, double max)
Sets data range for an image.- Parameters:
min
- the data range start.max
- the data range end.
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addFilteredImageValue
public void addFilteredImageValue(java.lang.Number x)
Add a value that will be filtered out in image- Parameters:
x
- value to be filtered
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getFilteredImageValues
public java.util.List<java.lang.Number> getFilteredImageValues()
get a list of values that will be filtered out in image
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isTrueColor
public final boolean isTrueColor()
Returns true if this dataset is a true color image.
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isText
public final boolean isText()
Returns true if this dataset is ASCII text.- Returns:
- true if this dataset is ASCII text.
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getInterlace
public final int getInterlace()
Returns the interlace mode of a true color image (RGB). Valid values:INTERLACE_PIXEL -- RGB components are contiguous, i.e. rgb, rgb, rgb, ... INTERLACE_LINE -- each RGB component is stored as a scan line INTERLACE_PLANE -- each RGB component is stored as a plane
- Returns:
- the interlace mode of a true color image (RGB).
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isUnsigned
public final boolean isUnsigned()
Returns true if the original C data are unsigned integers.- Returns:
- true if the original C data are unsigned integers.
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getImageDataRange
public double[] getImageDataRange()
Returns the (min, max) pair of image data range.- Returns:
- the (min, max) pair of image data range.
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getFillValue
public final java.lang.Object getFillValue()
Returns the fill values for the dataset.- Returns:
- the fill values for the dataset.
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