dap4.servlet

Class CDMDataAtomic

java.lang.Object

dap4.dap4shared.AbstractData

dap4.dap4shared.AbstractDataVariable

dap4.servlet.CDMDataAtomic

All Implemented Interfaces:

Data, DataAtomic, DataVariable

public class CDMDataAtomic
extends AbstractDataVariable
implements DataAtomic

Field Summary

Fields

Modifier and Type	Field and Description
protected AtomicType	atomtype
protected DapType	basetype
protected Array	data
protected CDMDSP	dsp
protected long	product

Fields inherited from class dap4.dap4shared.AbstractData

sort, template

Constructor Summary

Constructors

Constructor and Description
CDMDataAtomic(CDMDSP dsp, DapAtomicVariable template, Array array)

Method Summary

Modifier and Type	Method and Description
protected DapSort	computesort(Array array)
long	getCount() Get the total number of elements in the atomic array.
long	getElementSize() Get the s ize of a single element in bytes; 0 => undefined
DapType	getType() Get the type of this atomic variable
void	read(List<Slice> slices, Object data, long offset) Read of multiple values at once.
Object	read(long index) Provide a read of a single value at a given offset in a (possibly dimensioned) atomic valued variable.

Methods inherited from class dap4.dap4shared.AbstractDataVariable

getVariable

Methods inherited from class dap4.dap4shared.AbstractData

computesort, getSort, getTemplate

Methods inherited from class java.lang.Object

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

Methods inherited from interface dap4.core.data.DataVariable

getVariable

Methods inherited from interface dap4.core.data.Data

getSort, getTemplate

Field Detail

dsp

protected CDMDSP dsp

product

protected long product

basetype

protected DapType basetype

atomtype

protected AtomicType atomtype

data

protected Array data

Constructor Detail

CDMDataAtomic

public CDMDataAtomic(CDMDSP dsp,
                     DapAtomicVariable template,
                     Array array)
              throws DataException

Throws:

DataException

Method Detail

getType

public DapType getType()

Description copied from interface: DataAtomic

Get the type of this atomic variable

Specified by:

getType in interface DataAtomic

Returns:

the type

getCount

public long getCount()

Description copied from interface: DataAtomic

Get the total number of elements in the atomic array. A scalar is treated as a one element array.

Specified by:

getCount in interface DataAtomic

Returns:

1 if the variable is scalar, else the product of the dimensions of the variable.

getElementSize

public long getElementSize()

Description copied from interface: DataAtomic

Get the s ize of a single element in bytes; 0 => undefined

Specified by:

getElementSize in interface DataAtomic

Returns:

size

read

public void read(List<Slice> slices,
                 Object data,
                 long offset)
          throws DataException

Description copied from interface: DataAtomic

Read of multiple values at once. The returned value (parameter "data") is some form of java array (e.g. int[]). The type depends on the value of getType(). Note that implementations of this interface are free to provide alternate read methods that return values in e.g. a java.nio.Buffer. Note that unsigned types (e.g. UInt64) are returned as a signed version (e.g. Int64), and will have the proper bit pattern for the unsigned value. If the size of the "data" array is not the correct size, then an error will be returned. For opaque data, the result is ByteBuffer[].

Specified by:

read in interface DataAtomic

Parameters:

slices - the set of slices defining which values to return

data - the array into which the values are returned

offset - the offset into data into which to read

Throws:

DataException

read

public Object read(long index)
            throws DataException

Description copied from interface: DataAtomic

Provide a read of a single value at a given offset in a (possibly dimensioned) atomic valued variable. As mentioned above, unsigned types are returned as a signed version. The type of the returned value is the obvious one (e.g. int->Integer, opaque->ByteBuffer, etc.).

Specified by:

read in interface DataAtomic

Throws:

DataException

computesort

protected DapSort computesort(Array array)
                       throws DataException

Throws:

DataException