Package org.apache.qpid.protonj2.buffer.impl

Class ProtonCompositeBufferImpl

java.lang.Object

org.apache.qpid.protonj2.resource.SharedResource<ProtonBuffer>

org.apache.qpid.protonj2.buffer.impl.ProtonCompositeBufferImpl

All Implemented Interfaces:

AutoCloseable, Comparable<ProtonBuffer>, ProtonBuffer, ProtonBufferAccessors, ProtonCompositeBuffer, Resource<ProtonBuffer>

public final class ProtonCompositeBufferImpl
extends SharedResource<ProtonBuffer>
implements ProtonCompositeBuffer

The built in composite buffer implementation.

Constructor Summary

Constructors

Constructor	Description
ProtonCompositeBufferImpl(ProtonBufferAllocator allocator)	Creates a new empty composite buffer.

Method Summary

Modifier and Type	Method	Description
ProtonBufferAllocator	allocator()
ProtonCompositeBuffer	append(ProtonBuffer buffer)	Appends the given buffer to this composite buffer if all the constraints on buffer composites are met, otherwise thrown an exception.
ProtonBufferIterator	bufferIterator(int offset, int length)	Creates and returns a new ProtonBufferIterator that iterates from the given offset and continues until specified number of bytes has been traversed.
ProtonBufferIterator	bufferReverseIterator(int offset, int length)	Creates and returns a new ProtonBufferIterator that reverse iterates from the given offset and continues until specified number of bytes has been traversed.
int	capacity()
ProtonCompositeBuffer	compact()	Moves the readable portion of the buffer to the beginning of the underlying buffer storage and possibly makes additional bytes available for writes before a buffer expansion would occur via an ProtonBuffer.ensureWritable(int) call.
ProtonBufferComponentAccessor	componentAccessor()	Returns a component access object that can be used to gain access to the constituent buffer components for use in IO operations or other lower level buffer operations that need to work on single compoents.
int	componentCount()	Returns the number of constituent buffer components that are contained in this buffer instance which for a non-composite buffer will always be one (namely itself).
ProtonCompositeBuffer	convertToReadOnly()	Converts this buffer instance to a read-only buffer, any write operation that is performed on this buffer following this call will fail.
ProtonCompositeBuffer	copy(int index, int length, boolean readOnly)	Returns a copy of this buffer's sub-region.
void	copyInto(int offset, byte[] destination, int destOffset, int length)	Copies the given number of bytes from this buffer into the specified target byte array starting at the given offset into this buffer.
void	copyInto(int offset, ByteBuffer destination, int destOffset, int length)	Copies the given number of bytes from this buffer into the specified target ByteBuffer starting at the given offset into this buffer.
void	copyInto(int offset, ProtonBuffer destination, int destOffset, int length)	Copies the given number of bytes from this buffer into the specified target ProtonBuffer starting at the given offset into this buffer.
static ProtonCompositeBuffer	create(ProtonBufferAllocator allocator)	Create an empty ProtonCompositeBuffer with the given allocator which will be used any time the buffer needs to allocate additional storage space for implicit write or explicit ensure writable calls.
static ProtonCompositeBuffer	create(ProtonBufferAllocator allocator, ProtonBuffer buffer)	Create an empty ProtonCompositeBuffer with the given allocator which will be used any time the buffer needs to allocate additional storage space for implicit write or explicit ensure writable calls.
static ProtonCompositeBuffer	create(ProtonBufferAllocator allocator, ProtonBuffer[] buffers)	Create an empty ProtonCompositeBuffer with the given allocator which will be used any time the buffer needs to allocate additional storage space for implicit write or explicit ensure writable calls.
Iterable<ProtonBuffer>	decomposeBuffer()	Splits the composite buffer up into a collection of buffers that comprise it and leaves this buffer in an empty state.
ProtonCompositeBuffer	ensureWritable(int size, int minimumGrowth, boolean allowCompaction)	Ensures that the requested number of bytes is available for write operations in the current buffer, growing the buffer if needed to meet the requested writable capacity.
boolean	equals(Object o)
ProtonCompositeBuffer	fill(byte value)	Assigns the given value to every byte in the buffer without respect for the buffer read or write offsets.
byte	getByte(int index)	Reads a single byte at the given index and returns it without modification to the target buffer read offset.
char	getChar(int index)	Gets a 2-byte char from the specified index, this method will not modify the read or write index.
int	getInt(int index)	Gets a int from the specified index, this method will not modify the read or write index.
long	getLong(int index)	Gets a long from the specified index, this method will not modify the read or write index.
int	getReadOffset()
short	getShort(int index)	Gets a short from the specified index, this method will not modify the read or write index.
int	getWriteOffset()
int	hashCode()
int	implicitGrowthLimit()	Returns the limit assigned to this buffer if one was set which controls how large the capacity of the buffer can grow implicitly via write calls.
ProtonCompositeBuffer	implicitGrowthLimit(int limit)	Configures the limit assigned to this buffer if one was set which controls how large the capacity of the buffer can grow implicitly via write calls.
int	indexOf(byte needle, int offset, int length)	Starting from the given offset into this buffer, find the next offset (index) in the buffer where the given value is located or -1 if the value is not found by the time the specified number of bytes has been searched.
boolean	isComposite()
boolean	isDirect()
boolean	isReadOnly()
int	readableComponentCount()	Returns the number of readable constituent buffer components that are contained in this buffer instance which for a non-composite buffer will always be zero or one (namely itself).
byte	readByte()	Reads one byte from the buffer and advances the read index by one.
char	readChar()	Reads a character value from the buffer and advances the read index by four.
int	readInt()	Reads a integer value from the buffer and advances the read index by four.
long	readLong()	Reads a long value from the buffer and advances the read index by eight.
short	readShort()	Reads a short value from the buffer and advances the read index by two.
protected void	releaseResourceOwnership()
protected RuntimeException	resourceIsClosedException()
ProtonBuffer	setByte(int index, byte value)	Sets the byte value at the given write index in this buffer's backing data store.
ProtonBuffer	setChar(int index, char value)	Sets the char value at the given write index in this buffer's backing data store.
ProtonBuffer	setInt(int index, int value)	Sets the int value at the given write index in this buffer's backing data store.
ProtonBuffer	setLong(int index, long value)	Sets the long value at the given write index in this buffer's backing data store.
ProtonCompositeBuffer	setReadOffset(int value)	Sets the read offset for this buffer.
ProtonBuffer	setShort(int index, short value)	Sets the short value at the given write index in this buffer's backing data store.
ProtonCompositeBuffer	setWriteOffset(int value)	Sets the write offset for this buffer.
ProtonCompositeBuffer	split(int splitOffset)	Splits this buffer at the given offset.
ProtonCompositeBuffer	splitComponentsCeil(int splitOffset)	Split this buffer returning a composite that consists of all the buffer components up to and including the buffer that contains the split offset, no buffer components are split.
ProtonCompositeBuffer	splitComponentsFloor(int splitOffset)	Split this buffer returning a composite that consists of all the buffer components that come before the buffer that contains the split offset, no buffer components are split.
String	toString()
int	transferFrom(FileChannel channel, long position, int length)	Reads a sequence of bytes from the given channel into this buffer.
int	transferFrom(ReadableByteChannel channel, int length)	Reads a sequence of bytes from the given channel into this buffer.
protected ProtonBuffer	transferTheResource()
int	transferTo(WritableByteChannel channel, int length)	Read from this buffer and write to the given channel.
ProtonCompositeBuffer	unwrap()	Return the underlying buffer object that backs this ProtonBuffer instance, or self if there is no backing object.
int	writableComponentCount()	Returns the number of writable constituent buffer components that are contained in this buffer instance which for a non-composite buffer will always be zero or one (namely itself).
ProtonBuffer	writeByte(byte value)	Writes a single byte to the buffer and advances the write index by one.
ProtonCompositeBuffer	writeBytes(byte[] source, int offset, int length)	Writes into this buffer, the given number of bytes from the byte array.
ProtonCompositeBuffer	writeBytes(ProtonBuffer source)	Writes into this buffer, all the readable bytes from the given buffer.
ProtonBuffer	writeChar(char value)	Writes a single character to the buffer and advances the write index by four.
ProtonBuffer	writeInt(int value)	Writes a single integer to the buffer and advances the write index by four.
ProtonBuffer	writeLong(long value)	Writes a single long to the buffer and advances the write index by eight.
ProtonBuffer	writeShort(short value)	Writes a single short to the buffer and advances the write index by two.

Methods inherited from class org.apache.qpid.protonj2.resource.SharedResource

acquire, close, isClosed, isShared, transfer

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.qpid.protonj2.buffer.ProtonBuffer

bufferIterator, bufferReverseIterator, clear, close, compareTo, getReadableBytes, getWritableBytes, indexOf, isClosed, isReadable, isWritable, readCharSequence, toString, writeCharSequence

Methods inherited from interface org.apache.qpid.protonj2.buffer.ProtonBufferAccessors

getBoolean, getDouble, getFloat, getUnsignedByte, getUnsignedInt, getUnsignedShort, readBoolean, readDouble, readFloat, readUnsignedByte, readUnsignedInt, readUnsignedShort, setBoolean, setDouble, setFloat, setUnsignedByte, setUnsignedInt, setUnsignedShort, writeBoolean, writeDouble, writeFloat, writeUnsignedByte, writeUnsignedInt, writeUnsignedShort

Methods inherited from interface org.apache.qpid.protonj2.buffer.ProtonCompositeBuffer

advanceReadOffset, advanceWriteOffset, copy, copy, copy, ensureWritable, readBytes, readBytes, readSplit, split, writeBytes, writeBytes, writeSplit

Methods inherited from interface org.apache.qpid.protonj2.resource.Resource

transfer

Constructor Details

ProtonCompositeBufferImpl

public ProtonCompositeBufferImpl(ProtonBufferAllocator allocator)

Creates a new empty composite buffer.

Parameters:

allocator - the allocator that created this composite buffer.

Method Details

allocator

public ProtonBufferAllocator allocator()

Returns:

this buffer's allocator which was assigned on create.

isDirect

public boolean isDirect()

Specified by:

isDirect in interface ProtonBuffer

Returns:

true if the buffer is backed by native memory.

convertToReadOnly

public ProtonCompositeBuffer convertToReadOnly()

Description copied from interface: ProtonBuffer

Converts this buffer instance to a read-only buffer, any write operation that is performed on this buffer following this call will fail. A buffer cannot be made writable after this call.

Specified by:

convertToReadOnly in interface ProtonBuffer

Specified by:

convertToReadOnly in interface ProtonCompositeBuffer

Returns:

this buffer for use in chaining.

implicitGrowthLimit

public int implicitGrowthLimit()

Description copied from interface: ProtonBuffer

Returns the limit assigned to this buffer if one was set which controls how large the capacity of the buffer can grow implicitly via write calls. Once the limit is hit any write call that requires more capacity than is currently available will throw an exception instead of allocating more space.

When a capacity limit is hit the buffer can still be enlarged but must be done explicitly via the ensure writable APIs.

Specified by:

implicitGrowthLimit in interface ProtonBuffer

Returns:

the number of bytes this buffer can currently grow to..

implicitGrowthLimit

public ProtonCompositeBuffer implicitGrowthLimit(int limit)

Description copied from interface: ProtonBuffer

Configures the limit assigned to this buffer if one was set which controls how large the capacity of the buffer can grow implicitly via write calls. Once the limit is hit any write call that requires more capacity than is currently available will throw an exception instead of allocating more space.

When a capacity limit is hit the buffer can still be enlarged but must be done explicitly via the ensure writable APIs.

The growth limit set applies only to this buffer instance and is not carried over to a copied buffer of the split buffer created from any of the buffer split calls.

Specified by:

implicitGrowthLimit in interface ProtonBuffer

Specified by:

implicitGrowthLimit in interface ProtonCompositeBuffer

Parameters:

limit - The limit to assign as the maximum capacity this buffer can grow

Returns:

this buffer for using in call chaining.

fill

public ProtonCompositeBuffer fill(byte value)

Description copied from interface: ProtonBuffer

Assigns the given value to every byte in the buffer without respect for the buffer read or write offsets.

Specified by:

fill in interface ProtonBuffer

Specified by:

fill in interface ProtonCompositeBuffer

Parameters:

value - The byte value to assign each byte in this buffer.

Returns:

this ProtonBuffer for chaining.

isComposite

public boolean isComposite()

Specified by:

isComposite in interface ProtonBuffer

Returns:

true if the buffer is backed by one or more ProtonBuffer instances.

componentCount

public int componentCount()

Description copied from interface: ProtonBuffer

Returns the number of constituent buffer components that are contained in this buffer instance which for a non-composite buffer will always be one (namely itself). For a composite buffer this count is the total count of all buffers mapped to the composite.

Specified by:

componentCount in interface ProtonBuffer

Returns:

the number of buffers managed by this ProtonBuffer instance.

readableComponentCount

public int readableComponentCount()

Description copied from interface: ProtonBuffer

Returns the number of readable constituent buffer components that are contained in this buffer instance which for a non-composite buffer will always be zero or one (namely itself). For a composite buffer this count is the total count of all buffers mapped to the composite which are readable.

Specified by:

readableComponentCount in interface ProtonBuffer

Returns:

the number of readable buffers managed by this ProtonBuffer instance.

writableComponentCount

public int writableComponentCount()

Description copied from interface: ProtonBuffer

Returns the number of writable constituent buffer components that are contained in this buffer instance which for a non-composite buffer will always be zero or one (namely itself). For a composite buffer this count is the total count of all buffers mapped to the composite which are writable.

Specified by:

writableComponentCount in interface ProtonBuffer

Returns:

the number of writable buffer components managed by this ProtonBuffer instance.

isReadOnly

public boolean isReadOnly()

Specified by:

isReadOnly in interface ProtonBuffer

Returns:

whether this buffer instance is read-only or not.

capacity

public int capacity()

Specified by:

capacity in interface ProtonBuffer

Returns:

the number of bytes this buffer can currently contain.

unwrap

public ProtonCompositeBuffer unwrap()

Description copied from interface: ProtonBuffer

Return the underlying buffer object that backs this ProtonBuffer instance, or self if there is no backing object. This method should be overridden in buffer abstraction when access to the underlying backing store is needed such as when wrapping pooled resources that need explicit release calls.

Specified by:

unwrap in interface ProtonBuffer

Returns:

an underlying buffer object or other backing store for this buffer.

getReadOffset

public int getReadOffset()

Specified by:

getReadOffset in interface ProtonBuffer

Returns:

the current value of the read offset for this buffer.

setReadOffset

public ProtonCompositeBuffer setReadOffset(int value)

Description copied from interface: ProtonBuffer

Sets the read offset for this buffer.

Specified by:

setReadOffset in interface ProtonBuffer

Specified by:

setReadOffset in interface ProtonCompositeBuffer

Parameters:

value - The offset into the buffer where the read offset should be positioned.

Returns:

this buffer for use in chaining.

getWriteOffset

public int getWriteOffset()

Specified by:

getWriteOffset in interface ProtonBuffer

Returns:

the current value of the write offset for this buffer.

setWriteOffset

public ProtonCompositeBuffer setWriteOffset(int value)

Description copied from interface: ProtonBuffer

Sets the write offset for this buffer.

Specified by:

setWriteOffset in interface ProtonBuffer

Specified by:

setWriteOffset in interface ProtonCompositeBuffer

Parameters:

value - The offset into the buffer where the write offset should be positioned.

Returns:

this buffer for use in chaining.

compact

public ProtonCompositeBuffer compact()

Description copied from interface: ProtonBuffer

Moves the readable portion of the buffer to the beginning of the underlying buffer storage and possibly makes additional bytes available for writes before a buffer expansion would occur via an ProtonBuffer.ensureWritable(int) call.

Specified by:

compact in interface ProtonBuffer

Specified by:

compact in interface ProtonCompositeBuffer

Returns:

this buffer for using in call chaining.

copyInto

public void copyInto(int offset,
 byte[] destination,
 int destOffset,
 int length)

Description copied from interface: ProtonBuffer

Copies the given number of bytes from this buffer into the specified target byte array starting at the given offset into this buffer. The copied region is written into the target starting at the given offset and continues for the specified length of elements.

Specified by:

copyInto in interface ProtonBuffer

Parameters:

offset - The offset into this buffer where the copy begins from.

destination - The destination byte array where the copied bytes are written.

destOffset - The offset into the destination to begin writing the copied bytes.

length - The number of bytes to copy into the destination.

copyInto

public void copyInto(int offset,
 ByteBuffer destination,
 int destOffset,
 int length)

Description copied from interface: ProtonBuffer

Copies the given number of bytes from this buffer into the specified target ByteBuffer starting at the given offset into this buffer. The copied region is written into the target starting at the given offset and continues for the specified length of elements.

Specified by:

copyInto in interface ProtonBuffer

Parameters:

offset - The offset into this buffer where the copy begins from.

destination - The destination ByteBuffer where the copied bytes are written.

destOffset - The offset into the destination to begin writing the copied bytes.

length - The number of bytes to copy into the destination.

copyInto

public void copyInto(int offset,
 ProtonBuffer destination,
 int destOffset,
 int length)

Description copied from interface: ProtonBuffer

Copies the given number of bytes from this buffer into the specified target ProtonBuffer starting at the given offset into this buffer. The copied region is written into the target starting at the given offset and continues for the specified length of elements.

Specified by:

copyInto in interface ProtonBuffer

Parameters:

offset - The offset into this buffer where the copy begins from.

destination - The destination ProtonBuffer where the copied bytes are written.

destOffset - The offset into the destination to begin writing the copied bytes.

length - The number of bytes to copy into the destination.

writeBytes

public ProtonCompositeBuffer writeBytes(byte[] source,
 int offset,
 int length)

Description copied from interface: ProtonBuffer

Writes into this buffer, the given number of bytes from the byte array. This updates the ProtonBuffer.getWriteOffset() of this buffer by the length argument.

Specified by:

writeBytes in interface ProtonBuffer

Specified by:

writeBytes in interface ProtonCompositeBuffer

Parameters:

source - The byte array to read from.

offset - The position in the source from where bytes should be written to this buffer.

length - The number of bytes to copy.

Returns:

this buffer for using in call chaining.

writeBytes

public ProtonCompositeBuffer writeBytes(ProtonBuffer source)

Description copied from interface: ProtonBuffer

Writes into this buffer, all the readable bytes from the given buffer. This updates the ProtonBuffer.getWriteOffset() of this buffer, and the ProtonBuffer.getReadOffset() of the given buffer.

Specified by:

writeBytes in interface ProtonBuffer

Specified by:

writeBytes in interface ProtonCompositeBuffer

Parameters:

source - The buffer to read from.

Returns:

This buffer.

append

public ProtonCompositeBuffer append(ProtonBuffer buffer)

Description copied from interface: ProtonCompositeBuffer

Appends the given buffer to this composite buffer if all the constraints on buffer composites are met, otherwise thrown an exception.

Specified by:

append in interface ProtonCompositeBuffer

Parameters:

buffer - The buffer to append to this composite collection of buffers.

Returns:

this composite buffer instance.

decomposeBuffer

public Iterable<ProtonBuffer> decomposeBuffer()

Description copied from interface: ProtonCompositeBuffer

Splits the composite buffer up into a collection of buffers that comprise it and leaves this buffer in an empty state. The returned buffers are now the property of the caller.

Specified by:

decomposeBuffer in interface ProtonCompositeBuffer

Returns:

the collection of buffers that comprised this composite buffer.

ensureWritable

public ProtonCompositeBuffer ensureWritable(int size,
 int minimumGrowth,
 boolean allowCompaction)
                                     throws IndexOutOfBoundsException,
IllegalArgumentException

Description copied from interface: ProtonBuffer

Ensures that the requested number of bytes is available for write operations in the current buffer, growing the buffer if needed to meet the requested writable capacity. This method will not alter the write offset but may change the value returned from the capacity method if new buffer space is allocated. If the buffer cannot create the required number of byte via compaction then the buffer will be grown by either the requested number of bytes or by the minimum allowed value specified.

This method allows buffer compaction as a strategy to reclaim already read space to make room for additional writes. This implies that a composite buffer can reuse already read buffers to extend the buffer's writable space by moving them to the end of the set of composite buffers and reseting their index values to make them fully writable.

Specified by:

ensureWritable in interface ProtonBuffer

Specified by:

ensureWritable in interface ProtonCompositeBuffer

Parameters:

size - The number of bytes beyond the current write index needed.

minimumGrowth - The minimum number of byte that the buffer can grow by

allowCompaction - Can the buffer use compaction as a strategy to create more writable space.

Returns:

this buffer for using in call chaining.

Throws:

IndexOutOfBoundsException - if the amount given would result in the buffer exceeding the maximum capacity for this buffer.

IllegalArgumentException - if the amount given is less than zero.

copy

public ProtonCompositeBuffer copy(int index,
 int length,
 boolean readOnly)
                           throws IllegalArgumentException

Description copied from interface: ProtonBuffer

Returns a copy of this buffer's sub-region. Modifying the content of the returned buffer or this buffer does not affect each other at all. This method does not modify the value returned from ProtonBuffer.getReadOffset() or ProtonBuffer.getWriteOffset() of this buffer.

If this buffer is read-only and the requested copy is also read-only the copy may be shallow and allow each buffer to share the same memory.

Specified by:

copy in interface ProtonBuffer

Specified by:

copy in interface ProtonCompositeBuffer

Parameters:

index - The index in this buffer where the copy should begin

length - The number of bytes to copy to the new buffer from this one.

readOnly - Should the returned buffer be read-only or not.

Returns:

a new ProtonBuffer instance containing the copied bytes.

Throws:

IllegalArgumentException - if the offset or length given are out of bounds.

split

public ProtonCompositeBuffer split(int splitOffset)

Description copied from interface: ProtonBuffer

Splits this buffer at the given offset.

This creates two independent buffers that can manage differing views of the same memory region or in the case of a composite buffer two buffers that take ownership of differing sections of the composite buffer range. For a composite buffer a single buffer might be split if the offset lays within its bounds but all others buffers are divided amongst the two split buffers.

If this buffer is a read-only buffer then the resulting split buffer will also be read-only.

Specified by:

split in interface ProtonBuffer

Specified by:

split in interface ProtonCompositeBuffer

Parameters:

splitOffset - The offset in this buffer where the split should occur.

Returns:

A new buffer that owns the memory spanning the range given.

splitComponentsFloor

public ProtonCompositeBuffer splitComponentsFloor(int splitOffset)

Description copied from interface: ProtonCompositeBuffer

Split this buffer returning a composite that consists of all the buffer components that come before the buffer that contains the split offset, no buffer components are split. This allows for operations such as reclaiming read bytes from a buffer to reduce overall memory use.

Specified by:

splitComponentsFloor in interface ProtonCompositeBuffer

Parameters:

splitOffset - The index into the buffer where the split should be performed.

Returns:

A ProtonCompositeBuffer that owns all buffers that come before the buffer that holds given index.

splitComponentsCeil

public ProtonCompositeBuffer splitComponentsCeil(int splitOffset)

Description copied from interface: ProtonCompositeBuffer

Split this buffer returning a composite that consists of all the buffer components up to and including the buffer that contains the split offset, no buffer components are split.

Specified by:

splitComponentsCeil in interface ProtonCompositeBuffer

Parameters:

splitOffset - The index into the buffer where the split should be performed.

Returns:

A ProtonCompositeBuffer that owns all buffers up to and including the buffer that holds given index.

getByte

public byte getByte(int index)

Description copied from interface: ProtonBufferAccessors

Reads a single byte at the given index and returns it without modification to the target buffer read offset.

Specified by:

getByte in interface ProtonBufferAccessors

Parameters:

index - The index into the buffer where the value should be read.

Returns:

the value read from the given index.

getChar

public char getChar(int index)

Description copied from interface: ProtonBufferAccessors

Gets a 2-byte char from the specified index, this method will not modify the read or write index.

Specified by:

getChar in interface ProtonBufferAccessors

Parameters:

index - The index into the buffer where the value should be read.

Returns:

the value read from the given index.

getShort

public short getShort(int index)

Description copied from interface: ProtonBufferAccessors

Gets a short from the specified index, this method will not modify the read or write index.

Specified by:

getShort in interface ProtonBufferAccessors

Parameters:

index - The index into the buffer where the value should be read.

Returns:

the value read from the given index.

getInt

public int getInt(int index)

Description copied from interface: ProtonBufferAccessors

Gets a int from the specified index, this method will not modify the read or write index.

Specified by:

getInt in interface ProtonBufferAccessors

Parameters:

index - The index into the buffer where the value should be read.

Returns:

the value read from the given index.

getLong

public long getLong(int index)

Description copied from interface: ProtonBufferAccessors

Gets a long from the specified index, this method will not modify the read or write index.

Specified by:

getLong in interface ProtonBufferAccessors

Parameters:

index - The index into the buffer where the value should be read.

Returns:

the value read from the given index.

setByte

public ProtonBuffer setByte(int index,
 byte value)

Description copied from interface: ProtonBufferAccessors

Sets the byte value at the given write index in this buffer's backing data store.

Specified by:

setByte in interface ProtonBufferAccessors

Parameters:

index - The index to start the write from.

value - The value to write at the given index.

Returns:

a reference to this ProtonBuffer for chaining.

setChar

public ProtonBuffer setChar(int index,
 char value)

Description copied from interface: ProtonBufferAccessors

Sets the char value at the given write index in this buffer's backing data store.

Specified by:

setChar in interface ProtonBufferAccessors

Parameters:

index - The index to start the write from.

value - The value to write at the given index.

Returns:

a reference to this ProtonBuffer for chaining.

setShort

public ProtonBuffer setShort(int index,
 short value)

Description copied from interface: ProtonBufferAccessors

Sets the short value at the given write index in this buffer's backing data store.

Specified by:

setShort in interface ProtonBufferAccessors

Parameters:

index - The index to start the write from.

value - The value to write at the given index.

Returns:

a reference to this ProtonBuffer for chaining.

setInt

public ProtonBuffer setInt(int index,
 int value)

Description copied from interface: ProtonBufferAccessors

Sets the int value at the given write index in this buffer's backing data store.

Specified by:

setInt in interface ProtonBufferAccessors

Parameters:

index - The index to start the write from.

value - The value to write at the given index.

Returns:

a reference to this ProtonBuffer for chaining.

setLong

public ProtonBuffer setLong(int index,
 long value)

Description copied from interface: ProtonBufferAccessors

Sets the long value at the given write index in this buffer's backing data store.

Specified by:

setLong in interface ProtonBufferAccessors

Parameters:

index - The index to start the write from.

value - The value to write at the given index.

Returns:

a reference to this ProtonBuffer for chaining.

readByte

public byte readByte()

Description copied from interface: ProtonBufferAccessors

Reads one byte from the buffer and advances the read index by one.

Specified by:

readByte in interface ProtonBufferAccessors

Returns:

a single byte from the ProtonBuffer.

readChar

public char readChar()

Description copied from interface: ProtonBufferAccessors

Reads a character value from the buffer and advances the read index by four.

Specified by:

readChar in interface ProtonBufferAccessors

Returns:

char value read from the buffer.

readShort

public short readShort()

Description copied from interface: ProtonBufferAccessors

Reads a short value from the buffer and advances the read index by two.

Specified by:

readShort in interface ProtonBufferAccessors

Returns:

short value read from the buffer.

readInt

public int readInt()

Description copied from interface: ProtonBufferAccessors

Reads a integer value from the buffer and advances the read index by four.

Specified by:

readInt in interface ProtonBufferAccessors

Returns:

integer value read from the buffer.

readLong

public long readLong()

Description copied from interface: ProtonBufferAccessors

Reads a long value from the buffer and advances the read index by eight.

Specified by:

readLong in interface ProtonBufferAccessors

Returns:

long value read from the buffer.

writeByte

public ProtonBuffer writeByte(byte value)

Description copied from interface: ProtonBufferAccessors

Writes a single byte to the buffer and advances the write index by one.

Specified by:

writeByte in interface ProtonBufferAccessors

Parameters:

value - The byte to write into the buffer.

Returns:

this ProtonBuffer for chaining.

writeChar

public ProtonBuffer writeChar(char value)

Description copied from interface: ProtonBufferAccessors

Writes a single character to the buffer and advances the write index by four.

Specified by:

writeChar in interface ProtonBufferAccessors

Parameters:

value - The char to write into the buffer.

Returns:

this ProtonBuffer for chaining.

writeShort

public ProtonBuffer writeShort(short value)

Description copied from interface: ProtonBufferAccessors

Writes a single short to the buffer and advances the write index by two.

Specified by:

writeShort in interface ProtonBufferAccessors

Parameters:

value - The short to write into the buffer.

Returns:

this ProtonBuffer for chaining.

writeInt

public ProtonBuffer writeInt(int value)

Description copied from interface: ProtonBufferAccessors

Writes a single integer to the buffer and advances the write index by four.

Specified by:

writeInt in interface ProtonBufferAccessors

Parameters:

value - The integer to write into the buffer.

Returns:

this ProtonBuffer for chaining.

writeLong

public ProtonBuffer writeLong(long value)

Description copied from interface: ProtonBufferAccessors

Writes a single long to the buffer and advances the write index by eight.

Specified by:

writeLong in interface ProtonBufferAccessors

Parameters:

value - The long to write into the buffer.

Returns:

this ProtonBuffer for chaining.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

transferTo

public int transferTo(WritableByteChannel channel,
 int length)
               throws IOException

Description copied from interface: ProtonBuffer

Read from this buffer and write to the given channel.

The number of bytes actually written to the channel are returned. No more than the given length of bytes, or the number of readable bytes, will be written to the channel, whichever is smaller. A channel that has a position marker, will be advanced by the number of bytes written. The read offset of this buffer will also be advanced by the number of bytes written.

Specified by:

transferTo in interface ProtonBuffer

Parameters:

channel - The channel to write to.

length - The maximum number of bytes to write.

Returns:

The actual number of bytes written, possibly zero.

Throws:

IOException - If the write-operation on the channel failed for some reason.

transferFrom

public int transferFrom(ReadableByteChannel channel,
 int length)
                 throws IOException

Description copied from interface: ProtonBuffer

Reads a sequence of bytes from the given channel into this buffer.

The method reads a given amount of bytes from the provided channel and returns the number of bytes actually read which can be zero or -1 if the channel has reached the end of stream state.

The length value given is a maximum limit however the code will adjust this if the number of writable bytes in this buffer is smaller (or zero) and the result will indicate how many bytes where actually read. The write offset of this buffer will be advanced by the number of bytes read from the buffer as will the channel position index if one exists.

Specified by:

transferFrom in interface ProtonBuffer

Parameters:

channel - The readable byte channel where the bytes are read

length - The maximum number of bytes to read from the channel

Returns:

The number of bytes read, possibly zero, or -1 if the channel has reached end-of-stream

Throws:

IOException - if the read operation fails

transferFrom

public int transferFrom(FileChannel channel,
 long position,
 int length)
                 throws IOException

Description copied from interface: ProtonBuffer

Reads a sequence of bytes from the given channel into this buffer.

The method reads a given amount of bytes from the provided channel and returns the number of bytes actually read which can be zero or -1 if the channel has reached the end of stream state.

The length value given is a maximum limit however the code will adjust this if the number of writable bytes in this buffer is smaller (or zero) and the result will indicate how many bytes where actually read. The write offset of this buffer will be advanced by the number of bytes read from the buffer, the channel will not have its position modified.

Specified by:

transferFrom in interface ProtonBuffer

Parameters:

channel - The File channel where the bytes are read

position - The position in the channel where the read should begin

length - The maximum number of bytes to read from the channel

Returns:

The number of bytes read, possibly zero, or -1 if the channel has reached end-of-stream

Throws:

IOException - if the read operation fails

bufferIterator

public ProtonBufferIterator bufferIterator(int offset,
 int length)

Description copied from interface: ProtonBuffer

Creates and returns a new ProtonBufferIterator that iterates from the given offset and continues until specified number of bytes has been traversed. The source buffer read and write offsets are not modified by an iterator instance.

The caller must ensure that the source buffer lifetime extends beyond the lifetime of the returned ProtonBufferIterator.

Specified by:

bufferIterator in interface ProtonBuffer

Parameters:

offset - The offset into the buffer where iteration begins

length - The number of bytes to iterate over.

Returns:

a new buffer iterator that iterates over the readable bytes.

bufferReverseIterator

public ProtonBufferIterator bufferReverseIterator(int offset,
 int length)

Description copied from interface: ProtonBuffer

Creates and returns a new ProtonBufferIterator that reverse iterates from the given offset and continues until specified number of bytes has been traversed. The source buffer read and write offsets are not modified by an iterator instance.

The caller must ensure that the source buffer lifetime extends beyond the lifetime of the returned ProtonBufferIterator.

Specified by:

bufferReverseIterator in interface ProtonBuffer

Parameters:

offset - The offset into the buffer where iteration begins

length - The number of bytes to iterate over.

Returns:

a new buffer iterator that iterates over the readable bytes.

indexOf

public int indexOf(byte needle,
 int offset,
 int length)

Description copied from interface: ProtonBuffer

Starting from the given offset into this buffer, find the next offset (index) in the buffer where the given value is located or -1 if the value is not found by the time the specified number of bytes has been searched. This method does not affect the read or write offset and can be called from any point in the buffer regardless of the current read or write offsets. The search bounds are that of the buffer's readable bytes meaning that the starting office cannot be less than the read offset and the length cannot cause the search to read past the readable bytes otherwise an IndexOutOfBoundsException will be thrown.

Specified by:

indexOf in interface ProtonBuffer

Parameters:

needle - The byte value to search for in the remaining buffer bytes.

offset - The offset into the buffer where the search should begin from.

length - The offset into the buffer where the search should begin from.

Returns:

the location in the buffer where the value was found or -1 if not found.

componentAccessor

public ProtonBufferComponentAccessor componentAccessor()

Description copied from interface: ProtonBuffer

Returns a component access object that can be used to gain access to the constituent buffer components for use in IO operations or other lower level buffer operations that need to work on single compoents.

The general usage of the component access object should be within a try-with-resource block as follows:

   try (ProtonBufferComponentAccessor accessor = buffer.componentAccessor()) {
      for (ProtonBufferComponent component : accessor.readableComponents()) {
         // Access logic here....
      }
   }
 

Specified by:

componentAccessor in interface ProtonBuffer

Returns:

a component access object instance used to view the buffer internal components

create

public static ProtonCompositeBuffer create(ProtonBufferAllocator allocator)

Create an empty ProtonCompositeBuffer with the given allocator which will be used any time the buffer needs to allocate additional storage space for implicit write or explicit ensure writable calls.

Parameters:

allocator - the allocator to use when expanding capacity

Returns:

a new ProtonCompositeBuffer that uses the provided allocator

create

public static ProtonCompositeBuffer create(ProtonBufferAllocator allocator,
 ProtonBuffer[] buffers)

Create an empty ProtonCompositeBuffer with the given allocator which will be used any time the buffer needs to allocate additional storage space for implicit write or explicit ensure writable calls.

Parameters:

allocator - the allocator to use when expanding capacity.

buffers - the sequence of buffers to compose.

Returns:

a new ProtonCompositeBuffer that uses the provided allocator

create

public static ProtonCompositeBuffer create(ProtonBufferAllocator allocator,
 ProtonBuffer buffer)

Create an empty ProtonCompositeBuffer with the given allocator which will be used any time the buffer needs to allocate additional storage space for implicit write or explicit ensure writable calls.

Parameters:

allocator - the allocator to use when expanding capacity.

buffer - the buffers to compose.

Returns:

a new ProtonCompositeBuffer that uses the provided allocator

releaseResourceOwnership

protected void releaseResourceOwnership()

Specified by:

releaseResourceOwnership in class SharedResource<ProtonBuffer>

transferTheResource

protected ProtonBuffer transferTheResource()

Specified by:

transferTheResource in class SharedResource<ProtonBuffer>

resourceIsClosedException

protected RuntimeException resourceIsClosedException()

Specified by:

resourceIsClosedException in class SharedResource<ProtonBuffer>