Package dap4.dap4lib.serial

Class D4DataCompiler

java.lang.Object

dap4.dap4lib.serial.D4DataCompiler

public class D4DataCompiler
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
protected dap4.core.data.ChecksumMode	checksummode
static int	COUNTSIZE
protected ByteBuffer	databuffer
protected dap4.core.dmr.DapDataset	dataset
static boolean	DEBUG
protected D4DSP	dsp
protected ByteOrder	order

Constructor Summary

Constructors

Constructor	Description
D4DataCompiler(D4DSP dsp, dap4.core.data.ChecksumMode checksummode, ByteOrder order, ByteBuffer databuffer)	Constructor

Method Summary

Modifier and Type	Method	Description
void	compile()	The goal here is to process the serialized databuffer and locate top-level variable positions in the serialized databuffer.
protected D4Cursor	compileAtomicVar(dap4.core.dmr.DapVariable var, D4Cursor container)
D4Cursor	compileSequence(dap4.core.dmr.DapVariable var, dap4.core.dmr.DapSequence dapseq, D4Cursor container)	Compile a sequence as a set of records.
protected D4Cursor	compileSequenceArray(dap4.core.dmr.DapVariable var, D4Cursor container)	Compile a sequence array.
protected D4Cursor	compileStructure(dap4.core.dmr.DapVariable var, dap4.core.dmr.DapStructure dapstruct, D4Cursor container)	Compile a structure instance.
protected D4Cursor	compileStructureArray(dap4.core.dmr.DapVariable var, D4Cursor container)	Compile a structure array.
protected D4Cursor	compileVar(dap4.core.dmr.DapVariable dapvar, D4Cursor container)
protected static int	computeTypeSize(dap4.core.dmr.DapType daptype)	Compute the size in databuffer of the serialized form
protected int	extractChecksum(ByteBuffer data)
protected static int	getCount(ByteBuffer data)
protected static int	getPos(ByteBuffer data)
protected static void	skip(ByteBuffer data, int count)
protected static long	walkByteStrings(long[] positions, ByteBuffer databuffer)

Methods inherited from class java.lang.Object

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

Field Detail

DEBUG

public static boolean DEBUG

COUNTSIZE

public static final int COUNTSIZE

See Also:

Constant Field Values

dataset

protected dap4.core.dmr.DapDataset dataset

databuffer

protected ByteBuffer databuffer

checksummode

protected dap4.core.data.ChecksumMode checksummode

order

protected ByteOrder order

dsp

protected D4DSP dsp

Constructor Detail

D4DataCompiler

public D4DataCompiler(D4DSP dsp,
                      dap4.core.data.ChecksumMode checksummode,
                      ByteOrder order,
                      ByteBuffer databuffer)
               throws dap4.core.util.DapException

Constructor

Parameters:

dsp - the D4DSP

checksummode -

databuffer - the source of serialized databuffer

Throws:

dap4.core.util.DapException

Method Detail

compile

public void compile()
             throws dap4.core.util.DapException

The goal here is to process the serialized databuffer and locate top-level variable positions in the serialized databuffer. Access to non-top-level variables is accomplished on the fly.

Throws:

dap4.core.util.DapException

compileVar

protected D4Cursor compileVar(dap4.core.dmr.DapVariable dapvar,
                              D4Cursor container)
                       throws dap4.core.util.DapException

Throws:

dap4.core.util.DapException

compileAtomicVar

protected D4Cursor compileAtomicVar(dap4.core.dmr.DapVariable var,
                                    D4Cursor container)
                             throws dap4.core.util.DapException

Parameters:

var -

container -

Returns:

data

Throws:

dap4.core.util.DapException

compileStructureArray

protected D4Cursor compileStructureArray(dap4.core.dmr.DapVariable var,
                                         D4Cursor container)
                                  throws dap4.core.util.DapException

Compile a structure array.

Parameters:

var - the template

container - if inside a compound object

Returns:

A DataCompoundArray for the databuffer for this struct.

Throws:

dap4.core.util.DapException

compileStructure

protected D4Cursor compileStructure(dap4.core.dmr.DapVariable var,
                                    dap4.core.dmr.DapStructure dapstruct,
                                    D4Cursor container)
                             throws dap4.core.util.DapException

Compile a structure instance.

Parameters:

dapstruct - The template

container -

Returns:

A DataStructure for the databuffer for this struct.

Throws:

dap4.core.util.DapException

compileSequenceArray

protected D4Cursor compileSequenceArray(dap4.core.dmr.DapVariable var,
                                        D4Cursor container)
                                 throws dap4.core.util.DapException

Compile a sequence array.

Parameters:

var - the template

Returns:

A DataCompoundArray for the databuffer for this sequence.

Throws:

dap4.core.util.DapException

compileSequence

public D4Cursor compileSequence(dap4.core.dmr.DapVariable var,
                                dap4.core.dmr.DapSequence dapseq,
                                D4Cursor container)
                         throws dap4.core.util.DapException

Compile a sequence as a set of records.

Parameters:

dapseq -

container -

Returns:

sequence

Throws:

dap4.core.util.DapException

extractChecksum

protected int extractChecksum(ByteBuffer data)
                       throws dap4.core.util.DapException

Throws:

dap4.core.util.DapException

skip

protected static void skip(ByteBuffer data,
                           int count)

getCount

protected static int getCount(ByteBuffer data)

getPos

protected static int getPos(ByteBuffer data)

computeTypeSize

protected static int computeTypeSize(dap4.core.dmr.DapType daptype)

Compute the size in databuffer of the serialized form

Parameters:

daptype -

Returns:

type's serialized form size

walkByteStrings

protected static long walkByteStrings(long[] positions,
                                      ByteBuffer databuffer)