Package org.apache.qpid.protonj2.codec.decoders.primitives

Class AbstractSymbolTypeDecoder

java.lang.Object

org.apache.qpid.protonj2.codec.decoders.AbstractPrimitiveTypeDecoder<Symbol>

org.apache.qpid.protonj2.codec.decoders.primitives.AbstractSymbolTypeDecoder

All Implemented Interfaces:

SymbolTypeDecoder, PrimitiveTypeDecoder<Symbol>, StreamTypeDecoder<Symbol>, TypeDecoder<Symbol>

Direct Known Subclasses:

Symbol32TypeDecoder, Symbol8TypeDecoder

public abstract class AbstractSymbolTypeDecoder
extends AbstractPrimitiveTypeDecoder<Symbol>
implements SymbolTypeDecoder

Base class for the Symbol decoders used on AMQP Symbol types.

Constructor Summary

Constructors

Constructor	Description
AbstractSymbolTypeDecoder()

Method Summary

Modifier and Type	Method	Description
protected abstract int	readSize(InputStream stream)	Subclasses must read the correct number of bytes from the buffer to determine the size of the encoded Symbol value.
protected abstract int	readSize(ProtonBuffer buffer)	Subclasses must read the correct number of bytes from the buffer to determine the size of the encoded Symbol value.
String	readString(InputStream stream, StreamDecoderState state)	Reads a String view of an encoded Symbol value from the given buffer.
String	readString(ProtonBuffer buffer, DecoderState state)	Reads a String view of an encoded Symbol value from the given buffer.
Symbol	readValue(InputStream stream, StreamDecoderState state)	Reads the next type from the given buffer and returns it.
Symbol	readValue(ProtonBuffer buffer, DecoderState state)	Reads the next type from the given buffer and returns it.
void	skipValue(InputStream stream, StreamDecoderState state)	Skips over the bytes that compose the type this descriptor decodes.
void	skipValue(ProtonBuffer buffer, DecoderState state)	Skips over the bytes that compose the type this descriptor decodes.

Methods inherited from class org.apache.qpid.protonj2.codec.decoders.AbstractPrimitiveTypeDecoder

isArrayType, isJavaPrimitive, readArrayElements, readArrayElements

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.decoders.PrimitiveTypeDecoder

getTypeCode, isJavaPrimitive

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

getTypeClass, isArrayType, readArrayElements

Methods inherited from interface org.apache.qpid.protonj2.codec.decoders.primitives.SymbolTypeDecoder

getTypeClass

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

isArrayType, readArrayElements

Constructor Detail

AbstractSymbolTypeDecoder

public AbstractSymbolTypeDecoder()

Method Detail

readValue

public Symbol readValue(ProtonBuffer buffer,
                        DecoderState state)
                 throws DecodeException

Description copied from interface: TypeDecoder

Reads the next type from the given buffer and returns it.

Specified by:

readValue in interface TypeDecoder<Symbol>

Parameters:

buffer - the source of encoded data.

state - the current state of the decoder.

Returns:

the next instance in the stream that this decoder handles.

Throws:

DecodeException - if an error is encountered while reading the next value.

readString

public String readString(ProtonBuffer buffer,
                         DecoderState state)
                  throws DecodeException

Reads a String view of an encoded Symbol value from the given buffer.

This method has the same result as calling the Symbol reading variant readValue(ProtonBuffer, DecoderState) and then invoking the toString method on the resulting Symbol.

Parameters:

buffer - The buffer to read the encoded symbol from.

state - The encoder state that applied to this decode operation.

Returns:

a String view of the encoded Symbol value.

Throws:

DecodeException - if an error occurs decoding the Symbol from the given buffer.

readValue

public Symbol readValue(InputStream stream,
                        StreamDecoderState state)
                 throws DecodeException

Description copied from interface: StreamTypeDecoder

Reads the next type from the given buffer and returns it.

Specified by:

readValue in interface StreamTypeDecoder<Symbol>

Parameters:

stream - the source of encoded data.

state - the current state of the decoder.

Returns:

the next instance in the stream that this decoder handles.

Throws:

DecodeException - if an error is encountered while reading the next value.

readString

public String readString(InputStream stream,
                         StreamDecoderState state)
                  throws DecodeException

Reads a String view of an encoded Symbol value from the given buffer.

This method has the same result as calling the Symbol reading variant readValue(ProtonBuffer, DecoderState) and then invoking the toString method on the resulting Symbol.

Parameters:

stream - The InputStream to read the encoded symbol from.

state - The encoder state that applied to this decode operation.

Returns:

a String view of the encoded Symbol value.

Throws:

DecodeException - if an error occurs decoding the Symbol from the given buffer.

skipValue

public void skipValue(ProtonBuffer buffer,
                      DecoderState state)
               throws DecodeException

Description copied from interface: TypeDecoder

Skips over the bytes that compose the type this descriptor decodes.

Skipping values can be used when the type is not used or processed by the application doing the decoding. An example might be an AMQP message decoder that only needs to decode certain parts of the message and not others.

Specified by:

skipValue in interface TypeDecoder<Symbol>

Parameters:

buffer - The buffer that contains the encoded type.

state - The decoder state.

Throws:

DecodeException - if an error occurs while skipping the value.

skipValue

public void skipValue(InputStream stream,
                      StreamDecoderState state)
               throws DecodeException

Description copied from interface: StreamTypeDecoder

Skips over the bytes that compose the type this descriptor decodes.

Skipping values can be used when the type is not used or processed by the application doing the decoding. An example might be an AMQP message decoder that only needs to decode certain parts of the message and not others.

Specified by:

skipValue in interface StreamTypeDecoder<Symbol>

Parameters:

stream - The stream that contains the encoded type.

state - The decoder state.

Throws:

DecodeException - if an error occurs while skipping the value.

readSize

protected abstract int readSize(ProtonBuffer buffer)
                         throws DecodeException

Subclasses must read the correct number of bytes from the buffer to determine the size of the encoded Symbol value.

Parameters:

buffer - The buffer to read the size from.

Returns:

the number of bytes that make up the encoded Symbol value.

Throws:

DecodeException - if an error occurs reading the size value.

readSize

protected abstract int readSize(InputStream stream)
                         throws DecodeException

Subclasses must read the correct number of bytes from the buffer to determine the size of the encoded Symbol value.

Parameters:

stream - The InputStream to read the size from.

Returns:

the number of bytes that make up the encoded Symbol value.

Throws:

DecodeException - if an error occurs reading the size value.