ucar.ma2

Class ArrayStructureBB

java.lang.Object

ucar.ma2.Array

ucar.ma2.ArrayStructure

ucar.ma2.ArrayStructureBB

All Implemented Interfaces:

java.lang.Iterable<StructureData>

Direct Known Subclasses:

ArrayStructureBBpos, ArrayStructureBBsection

public class ArrayStructureBB
extends ArrayStructure

Concrete implementation of ArrayStructure, data storage is in a ByteBuffer, which is converted to member data on the fly. In order to use this, the records must have the same size, and the member offset must be the same for each record. Use StructureMembers.setStructureSize() to set the record size. Use StructureMembers.Member.setDataParam() to set the offset of the member from the start of each record. The member data will then be located in the BB at offset = recnum * getStructureSize() + member.getDataParam(). This defers object creation for efficiency. Use getArray() and getScalar() data accessors if possible.

 Structure pdata = (Structure) ncfile.findVariable(name);
 StructureMembers members = pdata.makeStructureMembers();
 members.findMember("value").setDataParam(0); // these are the offsets into the record
 members.findMember("x_start").setDataParam(2);
 members.findMember("y_start").setDataParam(4);
 members.findMember("direction").setDataParam(6);
 members.findMember("speed").setDataParam(8);
 int recsize = pos[1] - pos[0]; // each record must be all the same size
 members.setStructureSize(recsize);
 ArrayStructureBB asbb = new ArrayStructureBB(members, new int[] {size}, bos, pos[0]);
 

For String members, you must store the Strings in the stringHeap. An integer index into the heap is used in the ByteBuffer.

See Also:

Array

Nested Class Summary

Nested classes/interfaces inherited from class ucar.ma2.ArrayStructure

ArrayStructure.ArrayStructureIterator

Constructor Summary

Constructors

Constructor and Description
ArrayStructureBB(StructureMembers members, int[] shape) Create a new Array of type StructureData and the given members and shape.
ArrayStructureBB(StructureMembers members, int[] shape, java.nio.ByteBuffer bbuffer, int offset) Construct an ArrayStructureBB with the given ByteBuffer.

Method Summary

Modifier and Type	Method and Description
void	addObjectToHeap(int recnum, StructureMembers.Member m, java.lang.Object s)
int	addObjectToHeap(java.lang.Object s)
Array	getArray(int recnum, StructureMembers.Member m) Get member data of any type for a specific record as an Array.
ArraySequence	getArraySequence(int recnum, StructureMembers.Member m) Get member data of type ArraySequence
ArrayStructure	getArrayStructure(int recnum, StructureMembers.Member m) Get member data of type array of Structure.
java.nio.ByteBuffer	getByteBuffer() Return backing storage as a ByteBuffer
java.util.List<java.lang.Object>	getHeap() DO NOT MODIFY
byte[]	getJavaArrayByte(int recnum, StructureMembers.Member m) Get member data of type byte as a 1D array.
char[]	getJavaArrayChar(int recnum, StructureMembers.Member m) Get member data of type char as a 1D array.
double[]	getJavaArrayDouble(int recnum, StructureMembers.Member m) Get member data of type double as a 1D array.
float[]	getJavaArrayFloat(int recnum, StructureMembers.Member m) Get member data of type float as a 1D array.
int[]	getJavaArrayInt(int recnum, StructureMembers.Member m) Get member data of type int as a 1D array.
long[]	getJavaArrayLong(int recnum, StructureMembers.Member m) Get member data of type long as a 1D array.
short[]	getJavaArrayShort(int recnum, StructureMembers.Member m) Get member data of type short as a 1D array.
java.lang.String[]	getJavaArrayString(int recnum, StructureMembers.Member m) Get member data of type String as a 1D array.
byte	getScalarByte(int recnum, StructureMembers.Member m) Get scalar member data of type byte.
char	getScalarChar(int recnum, StructureMembers.Member m) Get scalar member data of type char.
double	getScalarDouble(int recnum, StructureMembers.Member m) Get scalar member data of type double.
float	getScalarFloat(int recnum, StructureMembers.Member m) Get scalar member data of type float.
int	getScalarInt(int recnum, StructureMembers.Member m) Get scalar member data of type int.
long	getScalarLong(int recnum, StructureMembers.Member m) Get scalar member data of type long.
short	getScalarShort(int recnum, StructureMembers.Member m) Get scalar member data of type short.
java.lang.String	getScalarString(int recnum, StructureMembers.Member m) Get member data of type String or char.
StructureData	getScalarStructure(int recnum, StructureMembers.Member m) Get member data of type Structure.
static int	setOffsets(StructureMembers members) Set the offsets, based on m.getSizeBytes().
void	showInternal(java.util.Formatter f, Indent indent)
static int	showOffsets(StructureMembers members, Indent indent, java.util.Formatter f)

Methods inherited from class ucar.ma2.ArrayStructure

convertScalarDouble, convertScalarFloat, convertScalarInt, convertScalarLong, copy, createView, extractMemberArray, findMember, getArrayObject, getBoolean, getBoolean, getByte, getByte, getChar, getChar, getDouble, getDouble, getElementType, getFloat, getFloat, getInt, getInt, getLong, getLong, getMembers, getObject, getObject, getScalarObject, getShort, getShort, getSizeBytes, getStorage, getStructureData, getStructureData, getStructureDataIterator, getStructureMemberNames, getStructureMembers, getStructureSize, iterator, sectionNoReduce, setBoolean, setBoolean, setByte, setByte, setChar, setChar, setDouble, setDouble, setFloat, setFloat, setInt, setInt, setLong, setLong, setMemberArray, setObject, setObject, setShort, setShort, showInternalMembers

Methods inherited from class ucar.ma2.Array

arraycopy, copyTo1DJavaArray, copyToNDJavaArray, factory, factory, factory, factory, factoryConstant, factoryCopy, flip, get1DJavaArray, getDataAsByteBuffer, getDataAsByteBuffer, getDataAsByteBuffer, getDataType, getIndex, getIndexIterator, getRangeIterator, getRank, getShape, getSize, hasNext, isConstant, isUnsigned, isVlen, makeArray, makeArray, makeArray, makeArrayRankPlusOne, makeFromJavaArray, makeFromJavaArray, makeObjectArray, makeVlenArray, next, nextBoolean, nextByte, nextChar, nextDouble, nextFloat, nextInt, nextLong, nextShort, permute, reduce, reduce, resetLocalIterator, reshape, reshapeNoCopy, section, section, section, sectionNoReduce, shapeToString, slice, toString, transpose

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

ArrayStructureBB

public ArrayStructureBB(StructureMembers members,
                        int[] shape)

Create a new Array of type StructureData and the given members and shape. Generally, you extract the byte array and fill it:

 byte[] result = (byte[]) structureArray.getStorage();
 

Parameters:

members - a description of the structure members

shape - the shape of the Array.

ArrayStructureBB

public ArrayStructureBB(StructureMembers members,
                        int[] shape,
                        java.nio.ByteBuffer bbuffer,
                        int offset)

Construct an ArrayStructureBB with the given ByteBuffer.

Parameters:

members - the list of structure members.

shape - the shape of the structure array

bbuffer - the data is stored in this ByteBuffer. bbuffer.order must already be set.

offset - offset from the start of the ByteBufffer to the first record.

Method Detail

addObjectToHeap

public void addObjectToHeap(int recnum,
                            StructureMembers.Member m,
                            java.lang.Object s)

addObjectToHeap

public int addObjectToHeap(java.lang.Object s)

getArray

public Array getArray(int recnum,
                      StructureMembers.Member m)

Description copied from class: ArrayStructure

Get member data of any type for a specific record as an Array. This may avoid the overhead of creating the StructureData object, but is equivilent to getStructure(recno).getArray( Member m).

Overrides:

getArray in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member.

Returns:

Array values.

getArraySequence

public ArraySequence getArraySequence(int recnum,
                                      StructureMembers.Member m)

Description copied from class: ArrayStructure

Get member data of type ArraySequence

Overrides:

getArraySequence in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type Structure.

Returns:

nested ArrayStructure.

getArrayStructure

public ArrayStructure getArrayStructure(int recnum,
                                        StructureMembers.Member m)

Description copied from class: ArrayStructure

Get member data of type array of Structure.

Overrides:

getArrayStructure in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type Structure.

Returns:

nested ArrayStructure.

getByteBuffer

public java.nio.ByteBuffer getByteBuffer()

Return backing storage as a ByteBuffer

Returns:

backing storage as a ByteBuffer

getHeap

public java.util.List<java.lang.Object> getHeap()

DO NOT MODIFY

Returns:

heap

getJavaArrayByte

public byte[] getJavaArrayByte(int recnum,
                               StructureMembers.Member m)

Description copied from class: ArrayStructure

Get member data of type byte as a 1D array.

Overrides:

getJavaArrayByte in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type byte.

Returns:

byte[]

getJavaArrayChar

public char[] getJavaArrayChar(int recnum,
                               StructureMembers.Member m)

Description copied from class: ArrayStructure

Get member data of type char as a 1D array.

Overrides:

getJavaArrayChar in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type char.

Returns:

char[]

getJavaArrayDouble

public double[] getJavaArrayDouble(int recnum,
                                   StructureMembers.Member m)

Description copied from class: ArrayStructure

Get member data of type double as a 1D array. The member data may be any rank.

Overrides:

getJavaArrayDouble in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type double.

Returns:

double[]

getJavaArrayFloat

public float[] getJavaArrayFloat(int recnum,
                                 StructureMembers.Member m)

Description copied from class: ArrayStructure

Get member data of type float as a 1D array.

Overrides:

getJavaArrayFloat in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type float.

Returns:

float[]

getJavaArrayInt

public int[] getJavaArrayInt(int recnum,
                             StructureMembers.Member m)

Description copied from class: ArrayStructure

Get member data of type int as a 1D array.

Overrides:

getJavaArrayInt in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type int.

Returns:

int[]

getJavaArrayLong

public long[] getJavaArrayLong(int recnum,
                               StructureMembers.Member m)

Description copied from class: ArrayStructure

Get member data of type long as a 1D array.

Overrides:

getJavaArrayLong in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type long.

Returns:

long[]

getJavaArrayShort

public short[] getJavaArrayShort(int recnum,
                                 StructureMembers.Member m)

Description copied from class: ArrayStructure

Get member data of type short as a 1D array.

Overrides:

getJavaArrayShort in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type float.

Returns:

short[]

getJavaArrayString

public java.lang.String[] getJavaArrayString(int recnum,
                                             StructureMembers.Member m)

Description copied from class: ArrayStructure

Get member data of type String as a 1D array.

Overrides:

getJavaArrayString in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type String.

Returns:

String[]

getScalarByte

public byte getScalarByte(int recnum,
                          StructureMembers.Member m)

Description copied from class: ArrayStructure

Get scalar member data of type byte.

Overrides:

getScalarByte in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type byte.

Returns:

scalar double value

getScalarChar

public char getScalarChar(int recnum,
                          StructureMembers.Member m)

Description copied from class: ArrayStructure

Get scalar member data of type char.

Overrides:

getScalarChar in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type char.

Returns:

scalar double value

getScalarDouble

public double getScalarDouble(int recnum,
                              StructureMembers.Member m)

Description copied from class: ArrayStructure

Get scalar member data of type double.

Overrides:

getScalarDouble in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type double.

Returns:

scalar double value

getScalarFloat

public float getScalarFloat(int recnum,
                            StructureMembers.Member m)

Description copied from class: ArrayStructure

Get scalar member data of type float.

Overrides:

getScalarFloat in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type float.

Returns:

scalar double value

getScalarInt

public int getScalarInt(int recnum,
                        StructureMembers.Member m)

Description copied from class: ArrayStructure

Get scalar member data of type int.

Overrides:

getScalarInt in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type int.

Returns:

scalar double value

getScalarLong

public long getScalarLong(int recnum,
                          StructureMembers.Member m)

Description copied from class: ArrayStructure

Get scalar member data of type long.

Overrides:

getScalarLong in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type long.

Returns:

scalar double value

getScalarShort

public short getScalarShort(int recnum,
                            StructureMembers.Member m)

Description copied from class: ArrayStructure

Get scalar member data of type short.

Overrides:

getScalarShort in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type short.

Returns:

scalar double value

getScalarString

public java.lang.String getScalarString(int recnum,
                                        StructureMembers.Member m)

Description copied from class: ArrayStructure

Get member data of type String or char.

Overrides:

getScalarString in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type String or char.

Returns:

scalar String value

getScalarStructure

public StructureData getScalarStructure(int recnum,
                                        StructureMembers.Member m)

Description copied from class: ArrayStructure

Get member data of type Structure.

Overrides:

getScalarStructure in class ArrayStructure

Parameters:

recnum - get data from the recnum-th StructureData of the ArrayStructure. Must be less than getSize();

m - get data from this StructureMembers.Member. Must be of type Structure.

Returns:

scalar StructureData

setOffsets

public static int setOffsets(StructureMembers members)

Set the offsets, based on m.getSizeBytes(). Also sets members.setStructureSize().

Parameters:

members - set offsets for these members

Returns:

the total size

showInternal

public void showInternal(java.util.Formatter f,
                         Indent indent)

Overrides:

showInternal in class ArrayStructure

showOffsets

public static int showOffsets(StructureMembers members,
                              Indent indent,
                              java.util.Formatter f)