Package org.apache.qpid.protonj2.codec.encoders.messaging

Class TargetTypeEncoder

java.lang.Object

org.apache.qpid.protonj2.codec.encoders.AbstractDescribedTypeEncoder<V>

org.apache.qpid.protonj2.codec.encoders.AbstractDescribedListTypeEncoder<Target>

org.apache.qpid.protonj2.codec.encoders.messaging.TargetTypeEncoder

All Implemented Interfaces:

DescribedTypeEncoder<Target>, TypeEncoder<Target>

public final class TargetTypeEncoder
extends AbstractDescribedListTypeEncoder<Target>

Encoder of AMQP Target type values to a byte stream.

Constructor Summary

Constructors

Constructor	Description
TargetTypeEncoder()

Method Summary

Modifier and Type	Method	Description
UnsignedLong	getDescriptorCode()
Symbol	getDescriptorSymbol()
int	getElementCount(Target target)	Gets the number of elements that will result when this type is encoded into an AMQP List type.
byte	getListEncoding(Target value)	Determine the list type the given value can be encoded to based on the number of bytes that would be needed to hold the encoded form of the resulting list entries.
Class<Target>	getTypeClass()
void	writeElement(Target target, int index, ProtonBuffer buffer, Encoder encoder, EncoderState state)	Instructs the encoder to write the element identified with the given index

Methods inherited from class org.apache.qpid.protonj2.codec.encoders.AbstractDescribedListTypeEncoder

getMinElementCount, writeArray, writeRawArray, writeType

Methods inherited from class org.apache.qpid.protonj2.codec.encoders.AbstractDescribedTypeEncoder

isArrayType

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.qpid.protonj2.codec.DescribedTypeEncoder

encoderRegistered

Constructor Detail

TargetTypeEncoder

public TargetTypeEncoder()

Method Detail

getDescriptorCode

public UnsignedLong getDescriptorCode()

Returns:

the UnsignedLong value to use as the Descriptor for this type.

getDescriptorSymbol

public Symbol getDescriptorSymbol()

Returns:

the Symbol value to use as the Descriptor for this type.

getTypeClass

public Class<Target> getTypeClass()

Returns:

the Class type that this encoder handles.

writeElement

public void writeElement(Target target,
                         int index,
                         ProtonBuffer buffer,
                         Encoder encoder,
                         EncoderState state)

Description copied from class: AbstractDescribedListTypeEncoder

Instructs the encoder to write the element identified with the given index

Specified by:

writeElement in class AbstractDescribedListTypeEncoder<Target>

Parameters:

target - the source of the list elements to write

index - the element index that needs to be written

buffer - the buffer to write the element to

encoder - the current Encoder value to use.

state - the current EncoderState value to use.

getListEncoding

public byte getListEncoding(Target value)

Description copied from class: AbstractDescribedListTypeEncoder

Determine the list type the given value can be encoded to based on the number of bytes that would be needed to hold the encoded form of the resulting list entries.

Most encoders will return LIST32 but for cases where the type is known to be encoded to LIST8 or always encodes an empty list (LIST0) the encoder can optimize the encode step and not compute sizes.

Overrides:

getListEncoding in class AbstractDescribedListTypeEncoder<Target>

Parameters:

value - The value that is to be encoded.

Returns:

the encoding code of the list type encoding needed for this object.

getElementCount

public int getElementCount(Target target)

Description copied from class: AbstractDescribedListTypeEncoder

Gets the number of elements that will result when this type is encoded into an AMQP List type.

Specified by:

getElementCount in class AbstractDescribedListTypeEncoder<Target>

Parameters:

target - the value which will be encoded as a list type.

Returns:

the number of elements that should comprise the encoded list.