com.google.gwt.typedarrays.server

Class ArrayBufferViewImpl

java.lang.Object

com.google.gwt.typedarrays.server.ArrayBufferViewImpl

All Implemented Interfaces:

ArrayBufferView

Direct Known Subclasses:

DataViewImpl, Float32ArrayImpl, Float64ArrayImpl, Int16ArrayImpl, Int32ArrayImpl, Int8ArrayImpl, Uint16ArrayImpl, Uint32ArrayImpl, Uint8ArrayImpl

public abstract class ArrayBufferViewImpl
extends java.lang.Object
implements ArrayBufferView

Base class for ArrayBufferView implementations.

Field Summary

Fields

Modifier and Type	Field and Description
protected ArrayBufferImpl	arrayBuf
protected int	byteLength
protected int	byteOffset
(package private) static boolean	USE_LITTLE_ENDIAN The spec lets the platform's native endianness come through, so we choose to expose little-endian regardless -- if apps care about the endianness but don't test for it, it is likely they assume little-endian.

Constructor Summary

Constructors

Constructor and Description
ArrayBufferViewImpl(ArrayBuffer buffer, int byteOffset, int byteLength)

Method Summary

Modifier and Type	Method and Description
ArrayBuffer	buffer() Get the underlying ArrayBuffer.
int	byteLength() Get the length of this view in bytes.
int	byteOffset() Get the offset from the beginning of the underlying ArrayBuffer.
protected int	checkRange(int index, int bytesPerElement) Check the index range and throw an exception if out of range, if ok return the byte index of the specified element.

Methods inherited from class java.lang.Object

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

Field Detail

USE_LITTLE_ENDIAN

static final boolean USE_LITTLE_ENDIAN

The spec lets the platform's native endianness come through, so we choose to expose little-endian regardless -- if apps care about the endianness but don't test for it, it is likely they assume little-endian.

See Also:

Constant Field Values

arrayBuf

protected final ArrayBufferImpl arrayBuf

byteLength

protected final int byteLength

byteOffset

protected final int byteOffset

Constructor Detail

ArrayBufferViewImpl

public ArrayBufferViewImpl(ArrayBuffer buffer,
                           int byteOffset,
                           int byteLength)

Parameters:

buffer -

byteOffset -

byteLength -

Method Detail

buffer

public ArrayBuffer buffer()

Description copied from interface: ArrayBufferView

Get the underlying ArrayBuffer.

Specified by:

buffer in interface ArrayBufferView

Returns:

the ArrayBuffer instance backing this view

byteLength

public int byteLength()

Description copied from interface: ArrayBufferView

Get the length of this view in bytes.

Specified by:

byteLength in interface ArrayBufferView

Returns:

number of bytes in this view

byteOffset

public int byteOffset()

Description copied from interface: ArrayBufferView

Get the offset from the beginning of the underlying ArrayBuffer.

Specified by:

byteOffset in interface ArrayBufferView

Returns:

0-based offset from the beginning of ArrayBufferView.buffer()

checkRange

protected int checkRange(int index,
                         int bytesPerElement)

Check the index range and throw an exception if out of range, if ok return the byte index of the specified element.

Parameters:

index - an element index

bytesPerElement -

Returns:

the byte index of the start of this element