org.das2.qds.buffer.UByteDataSet

Unsigned Byte. This also contains a method for extracting the data at a location as a string.

UByteDataSet( int rank, int reclen, int recoffs, int len0, int len1, int len2, int len3, java.nio.ByteBuffer back )

collectString

collectString( java.nio.charset.Charset charset ) → String

efficiently return the data contained in the bytes presuming a string encoding. This is useful when the data is mostly binary but parts are text data. This is typically used with trim to extract text portions of data. This code shows how the length of each record in a U.S.G.S. DEM file is extracted: 

 from java.nio.charset import Charset
 usascii= Charset.forName( 'US-ASCII' )
 ds=getDataSet( 'vap+bin:%s?byteOffset=858&byteLength=6' % fil.toURI() )
 from java.lang import Integer
 ncol= Integer.parseUnsignedInt( ds.collectString( usascii ).strip() )
 print ncol

Parameters

charset - a Charset

Returns:

the string

See Also:

https://github.com/autoplot/dev/blob/master/demos/20190529/readUsgsDem.jyds


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putValue

putValue( double d ) → void

Parameters

d - a double

Returns:

void (returns nothing)

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putValue

putValue( int i0, double d ) → void

Parameters

i0 - an int
d - a double

Returns:

void (returns nothing)

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putValue

putValue( int i0, int i1, double d ) → void

Parameters

i0 - an int
i1 - an int
d - a double

Returns:

void (returns nothing)

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putValue

putValue( int i0, int i1, int i2, double d ) → void

Parameters

i0 - an int
i1 - an int
i2 - an int
d - a double

Returns:

void (returns nothing)

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putValue

putValue( int i0, int i1, int i2, int i3, double d ) → void

Parameters

i0 - an int
i1 - an int
i2 - an int
i3 - an int
d - a double

Returns:

void (returns nothing)

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value

value( ) → double

Returns:

double

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value

value( int i0 ) → double

Parameters

i0 - an int

Returns:

double

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value

value( int i0, int i1 ) → double

Parameters

i0 - an int
i1 - an int

Returns:

double

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value

value( int i0, int i1, int i2 ) → double

Parameters

i0 - an int
i1 - an int
i2 - an int

Returns:

double

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value

value( int i0, int i1, int i2, int i3 ) → double

Parameters

i0 - an int
i1 - an int
i2 - an int
i3 - an int

Returns:

double

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