Module lmdbjava

Package org.lmdbjava

Class ByteBufferProxy.AbstractByteBufferProxy

java.lang.Object

org.lmdbjava.BufferProxy<ByteBuffer>

org.lmdbjava.ByteBufferProxy.AbstractByteBufferProxy

Enclosing class:

ByteBufferProxy

public abstract static class ByteBufferProxy.AbstractByteBufferProxy
extends BufferProxy<ByteBuffer>

Provides ByteBuffer pooling and address resolution for concrete BufferProxy implementations.

Field Summary

Fields

Modifier and Type	Field	Description
protected static final String	FIELD_NAME_ADDRESS
protected static final String	FIELD_NAME_CAPACITY

Fields inherited from class org.lmdbjava.BufferProxy

MDB_VAL_STRUCT_SIZE, STRUCT_FIELD_OFFSET_DATA, STRUCT_FIELD_OFFSET_SIZE

Constructor Summary

Constructors

Constructor	Description
AbstractByteBufferProxy()

Method Summary

Modifier and Type	Method	Description
protected final long	address(ByteBuffer buffer)
final ByteBuffer	allocate()	Allocate a new buffer suitable for passing to BufferProxy.out(java.lang.Object, jnr.ffi.Pointer, long).
final int	compare(ByteBuffer o1, ByteBuffer o2)	Compare the two buffers.
static int	compareBuff(ByteBuffer o1, ByteBuffer o2)	Lexicographically compare two buffers.
final void	deallocate(ByteBuffer buff)	Deallocate a buffer that was previously provided by BufferProxy.allocate().
static Field	findField(Class<?> c, String name)
protected byte[]	getBytes(ByteBuffer buffer)	Obtain a copy of the bytes contained within the passed buffer.

Methods inherited from class org.lmdbjava.BufferProxy

in, in, out

Methods inherited from class java.lang.Object

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

Field Details

FIELD_NAME_ADDRESS

protected static final String FIELD_NAME_ADDRESS

See Also:

• Constant Field Values

FIELD_NAME_CAPACITY

protected static final String FIELD_NAME_CAPACITY

See Also:

• Constant Field Values

Constructor Details

AbstractByteBufferProxy

public AbstractByteBufferProxy()

Method Details

compareBuff

public static int compareBuff(ByteBuffer o1,
 ByteBuffer o2)

Lexicographically compare two buffers.

Parameters:

o1 - left operand (required)

o2 - right operand (required)

Returns:

as specified by Comparable interface

findField

public static Field findField(Class<?> c,
 String name)

address

protected final long address(ByteBuffer buffer)

allocate

public final ByteBuffer allocate()

Description copied from class: BufferProxy

Allocate a new buffer suitable for passing to BufferProxy.out(java.lang.Object, jnr.ffi.Pointer, long).

Specified by:

allocate in class BufferProxy<ByteBuffer>

Returns:

a buffer for passing to the out method

compare

public final int compare(ByteBuffer o1,
 ByteBuffer o2)

Description copied from class: BufferProxy

Compare the two buffers.

Implemented as a protected method to discourage use of the buffer proxy in collections etc (given by design it wraps a temporary value only).

Specified by:

compare in class BufferProxy<ByteBuffer>

Parameters:

o1 - left operand

o2 - right operand

Returns:

as per Comparable

deallocate

public final void deallocate(ByteBuffer buff)

Description copied from class: BufferProxy

Deallocate a buffer that was previously provided by BufferProxy.allocate().

Specified by:

deallocate in class BufferProxy<ByteBuffer>

Parameters:

buff - the buffer to deallocate (required)

getBytes

protected byte[] getBytes(ByteBuffer buffer)

Description copied from class: BufferProxy

Obtain a copy of the bytes contained within the passed buffer.

Specified by:

getBytes in class BufferProxy<ByteBuffer>

Parameters:

buffer - a non-null buffer created by this proxy instance

Returns:

a copy of the bytes this buffer is currently representing