org.apache.qpid.transport.codec
Class AbstractDecoder

java.lang.Object
  extended by org.apache.qpid.transport.codec.AbstractDecoder
All Implemented Interfaces:
Decoder
Direct Known Subclasses:
BBDecoder

abstract class AbstractDecoder
extends Object
implements Decoder

AbstractDecoder


Constructor Summary
AbstractDecoder()
           
 
Method Summary
protected abstract  byte doGet()
           
protected abstract  void doGet(byte[] bytes)
           
protected  byte get()
           
protected  void get(byte[] bytes)
           
protected  Binary get(int size)
           
 List<Object> readArray()
          An array is an ordered sequence of values of the same type.
 RangeSet readByteRanges()
           
 String readContent()
           
 long readDatetime()
          The datetime type encodes a date and time using the 64 bit POSIX time_t format.
 List<Object> readList()
          A list is an ordered sequence of (type, value) pairs.
 Map<String,Object> readMap()
          A map is a set of distinct keys where each key has an associated (type,value) pair.
 int readSequenceNo()
          // *The sequence-no type encodes, in network byte order, a serial number as defined in RFC-1982.
 RangeSet readSequenceSet()
           
 String readStr16()
          The str16 type encodes up to 65535 octets worth of UTF-8 unicode.
 String readStr8()
          The str8 type encodes up to 255 octets worth of UTF-8 unicode.
 Struct readStruct(int type)
           
 Struct readStruct32()
          The struct32 type describes any coded struct with a 32-bit (4 octet) size.
 int readUint16()
          The uint16 type is a 16-bit unsigned integral value encoded in network byte order.
 long readUint32()
          The uint32 type is a 32-bit unsigned integral value encoded in network byte order.
 long readUint64()
          The uint64 type is a 64-bit unsigned integral value encoded in network byte order.
 short readUint8()
          The uint8 type is an 8-bit unsigned integral value.
 UUID readUuid()
          The uuid type encodes a universally unique id as defined by RFC-4122.
 byte[] readVbin16()
          The vbin16 type encodes up to 65535 octets of opaque binary data.
 byte[] readVbin32()
          The vbin32 type encodes up to 4294967295 octets of opaque binary data.
 byte[] readVbin8()
          The vbin8 type encodes up to 255 octets of opaque binary data.
protected  short uget()
           
 
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.transport.codec.Decoder
hasRemaining, readBin128, readBytes, readDouble, readFloat, readInt16, readInt32, readInt64, readInt8, readReaminingBytes
 

Constructor Detail

AbstractDecoder

AbstractDecoder()
Method Detail

doGet

protected abstract byte doGet()

doGet

protected abstract void doGet(byte[] bytes)

get

protected byte get()

get

protected void get(byte[] bytes)

get

protected Binary get(int size)

uget

protected short uget()

readUint8

public short readUint8()
Description copied from interface: Decoder
The uint8 type is an 8-bit unsigned integral value.

Specified by:
readUint8 in interface Decoder
Returns:
an 8-bit unsigned integral value.

readUint16

public int readUint16()
Description copied from interface: Decoder
The uint16 type is a 16-bit unsigned integral value encoded in network byte order.

Specified by:
readUint16 in interface Decoder
Returns:
a 16-bit unsigned integral value encoded in network byte order.

readUint32

public long readUint32()
Description copied from interface: Decoder
The uint32 type is a 32-bit unsigned integral value encoded in network byte order.

Specified by:
readUint32 in interface Decoder
Returns:
a 32-bit unsigned integral value encoded in network byte order.

readSequenceNo

public int readSequenceNo()
Description copied from interface: Decoder
// *The sequence-no type encodes, in network byte order, a serial number as defined in RFC-1982.

Specified by:
readSequenceNo in interface Decoder
Returns:
a serial number as defined in RFC-1982.

readUint64

public long readUint64()
Description copied from interface: Decoder
The uint64 type is a 64-bit unsigned integral value encoded in network byte order.

Specified by:
readUint64 in interface Decoder
Returns:
a 64-bit unsigned integral value encoded in network byte order.

readDatetime

public long readDatetime()
Description copied from interface: Decoder
The datetime type encodes a date and time using the 64 bit POSIX time_t format.

Specified by:
readDatetime in interface Decoder
Returns:
a date and time using the 64 bit POSIX time_t format.

readStr8

public String readStr8()
Description copied from interface: Decoder
The str8 type encodes up to 255 octets worth of UTF-8 unicode. The number of octets of unicode is first encoded as an 8-bit unsigned integral value. This is followed by the actual UTF-8 unicode. Note that the encoded size refers to the number of octets of unicode, not necessarily the number of characters since the UTF-8 unicode may include multi-byte character sequences.

Specified by:
readStr8 in interface Decoder
Returns:
a string.

readStr16

public String readStr16()
Description copied from interface: Decoder
The str16 type encodes up to 65535 octets worth of UTF-8 unicode. The number of octets is first encoded as a 16-bit unsigned integral value in network byte order. This is followed by the actual UTF-8 unicode. Note that the encoded size refers to the number of octets of unicode, not necessarily the number of unicode characters since the UTF-8 unicode may include multi-byte character sequences. return a string.

Specified by:
readStr16 in interface Decoder

readVbin8

public byte[] readVbin8()
Description copied from interface: Decoder
The vbin8 type encodes up to 255 octets of opaque binary data. return a byte array.

Specified by:
readVbin8 in interface Decoder

readVbin16

public byte[] readVbin16()
Description copied from interface: Decoder
The vbin16 type encodes up to 65535 octets of opaque binary data.

Specified by:
readVbin16 in interface Decoder
Returns:
the corresponding byte array.

readVbin32

public byte[] readVbin32()
Description copied from interface: Decoder
The vbin32 type encodes up to 4294967295 octets of opaque binary data.

Specified by:
readVbin32 in interface Decoder
Returns:
the corresponding byte array.

readSequenceSet

public RangeSet readSequenceSet()
Specified by:
readSequenceSet in interface Decoder

readByteRanges

public RangeSet readByteRanges()
Specified by:
readByteRanges in interface Decoder

readUuid

public UUID readUuid()
Description copied from interface: Decoder
The uuid type encodes a universally unique id as defined by RFC-4122. The format and operations for this type can be found in section 4.1.2 of RFC-4122. return a universally unique id as defined by RFC-4122.

Specified by:
readUuid in interface Decoder

readContent

public String readContent()

readStruct

public Struct readStruct(int type)
Specified by:
readStruct in interface Decoder
Parameters:
type - the type of the struct.
Returns:
the decoded struct.

readStruct32

public Struct readStruct32()
Description copied from interface: Decoder
The struct32 type describes any coded struct with a 32-bit (4 octet) size. The type is restricted to be only coded structs with a 32-bit size, consequently the first six octets of any encoded value for this type MUST always contain the size, class-code, and struct-code in that order. The size is encoded as a 32-bit unsigned integral value in network byte order that is equal to the size of the encoded field-data, packing-flags, class-code, and struct-code. The class-code is a single octet that may be set to any valid class code. The struct-code is a single octet that may be set to any valid struct code within the given class-code. The first six octets are then followed by the packing flags and encoded field data. The presence and quantity of packingflags, as well as the specific fields are determined by the struct definition identified with the encoded class-code and struct-code.

Specified by:
readStruct32 in interface Decoder
Returns:
the decoded struct.

readMap

public Map<String,Object> readMap()
Description copied from interface: Decoder
A map is a set of distinct keys where each key has an associated (type,value) pair. The triple of the key, type, and value, form an entry within a map. Each entry within a given map MUST have a distinct key. A map is encoded as a size in octets, a count of the number of entries, followed by the encoded entries themselves. An encoded map may contain up to (4294967295 - 4) octets worth of encoded entries. The size is encoded as a 32-bit unsigned integral value in network byte order equal to the number of octets worth of encoded entries plus 4. (The extra 4 octets is added for the entry count.) The size is then followed by the number of entries encoded as a 32-bit unsigned integral value in network byte order. Finally the entries are encoded sequentially. An entry is encoded as the key, followed by the type, and then the value. The key is always a string encoded as a str8. The type is a single octet that may contain any valid AMQP type code. The value is encoded according to the rules defined by the type code for that entry.

Specified by:
readMap in interface Decoder
Returns:
the decoded map.

readList

public List<Object> readList()
Description copied from interface: Decoder
A list is an ordered sequence of (type, value) pairs. The (type, value) pair forms an item within the list. The list may contain items of many distinct types. A list is encoded as a size in octets, followed by a count of the number of items, followed by the items themselves encoded in their defined order. An encoded list may contain up to (4294967295 - 4) octets worth of encoded items. The size is encoded as a 32-bit unsigned integral value in network byte order equal to the number of octets worth of encoded items plus 4. (The extra4 octets is added for the item count.) The size is then followed by the number of items encoded as a 32-bit unsigned integral value in network byte order. Finally the items are encoded sequentially in their defined order. An item is encoded as the type followed by the value. The type is a single octet that may contain any valid AMQP type code. The value is encoded according to the rules defined by the type code for that item.

Specified by:
readList in interface Decoder
Returns:
the decoded list.

readArray

public List<Object> readArray()
Description copied from interface: Decoder
An array is an ordered sequence of values of the same type. The array is encoded in as a size in octets, followed by a type code, then a count of the number values in the array, and finally the values encoded in their defined order. An encoded array may contain up to (4294967295 - 5) octets worth of encoded values. The size is encoded as a 32-bit unsigned integral value in network byte order equal to the number of octets worth of encoded values plus 5. (The extra 5 octets consist of 4 octets for the count of the number of values, and one octet to hold the type code for the items inthe array.) The size is then followed by a single octet that may contain any valid AMQP type code. The type code is then followed by the number of values encoded as a 32-bit unsigned integral value in network byte order. Finally the values are encoded sequentially in their defined order according to the rules defined by the type code for the array.

Specified by:
readArray in interface Decoder
Returns:
the decoded array.


Licensed to the Apache Software Foundation