java.lang.Object
- com.caucho.hessian.io.AbstractHessianOutput
- - com.caucho.hessian.io.Hessian2Output

All Implemented Interfaces:: Hessian2Constants

Direct Known Subclasses:: HessianSerializerOutput

public class Hessian2Output
extends AbstractHessianOutput
implements Hessian2Constants

Output stream for Hessian 2 requests.

Since HessianOutput does not depend on any classes other than in the JDK, it can be extracted independently into a smaller package.

HessianOutput is unbuffered, so any client needs to provide its own buffering.

 OutputStream os = ...; // from http connection
 Hessian2Output out = new Hessian2Output(os);
 String value;

 out.startCall("hello", 1); // start hello call
 out.writeString("arg1");   // write a string argument
 out.completeCall();        // complete the call

Field Summary

Fields
Modifier and Type Field Description

protected OutputStream _os

static int SIZE
- Fields inherited from class com.caucho.hessian.io.AbstractHessianOutput
  _serializerFactory
- Fields inherited from interface com.caucho.hessian.io.Hessian2Constants
  BC_BINARY, BC_BINARY_CHUNK, BC_BINARY_DIRECT, BC_BINARY_SHORT, BC_CLASS_DEF, BC_DATE, BC_DATE_MINUTE, BC_DOUBLE, BC_DOUBLE_BYTE, BC_DOUBLE_MILL, BC_DOUBLE_ONE, BC_DOUBLE_SHORT, BC_DOUBLE_ZERO, BC_END, BC_FALSE, BC_INT, BC_INT_BYTE_ZERO, BC_INT_SHORT_ZERO, BC_INT_ZERO, BC_LIST_DIRECT, BC_LIST_DIRECT_UNTYPED, BC_LIST_FIXED, BC_LIST_FIXED_UNTYPED, BC_LIST_VARIABLE, BC_LIST_VARIABLE_UNTYPED, BC_LONG, BC_LONG_BYTE_ZERO, BC_LONG_INT, BC_LONG_SHORT_ZERO, BC_LONG_ZERO, BC_MAP, BC_MAP_UNTYPED, BC_NULL, BC_OBJECT, BC_OBJECT_DEF, BC_OBJECT_DIRECT, BC_REF, BC_STRING, BC_STRING_CHUNK, BC_STRING_DIRECT, BC_STRING_SHORT, BC_TRUE, BINARY_DIRECT_MAX, BINARY_SHORT_MAX, INT_BYTE_MAX, INT_BYTE_MIN, INT_DIRECT_MAX, INT_DIRECT_MIN, INT_SHORT_MAX, INT_SHORT_MIN, LIST_DIRECT_MAX, LONG_BYTE_MAX, LONG_BYTE_MIN, LONG_DIRECT_MAX, LONG_DIRECT_MIN, LONG_SHORT_MAX, LONG_SHORT_MIN, OBJECT_DIRECT_MAX, P_PACKET, P_PACKET_CHUNK, P_PACKET_DIRECT, P_PACKET_SHORT, PACKET_DIRECT_MAX, PACKET_SHORT_MAX, STRING_DIRECT_MAX, STRING_SHORT_MAX

Constructor Summary

Constructors
Constructor	Description
`Hessian2Output()`	Creates a new Hessian output stream, initialized with an underlying output stream.
`Hessian2Output(OutputStream os)`	Creates a new Hessian output stream, initialized with an underlying output stream.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`addRef(Object object)`	If the object has already been written, just write its ref.
`void`	`call(String method, Object[] args)`	Writes a complete method call.
`void`	`close()`
`void`	`completeCall()`	Completes.
`void`	`completeEnvelope()`	Completes an envelope.
`void`	`completeMessage()`	Completes reading the message
`void`	`completeReply()`	Completes reading the reply
`void`	`endPacket()`
`void`	`flush()`
`void`	`flushBuffer()`
`void`	`free()`
`OutputStream`	`getBytesOutputStream()`	Returns an output stream to write binary data.
`int`	`getRef(Object obj)`
`void`	`init(OutputStream os)`	Initialize the output with a new underlying stream.
`void`	`initPacket(OutputStream os)`
`boolean`	`isCloseStreamOnClose()`
`void`	`printLenString(String v)`	Prints a string to the stream, encoded as UTF-8 with preceeding length
`void`	`printString(char[] v, int strOffset, int length)`	Prints a string to the stream, encoded as UTF-8
`void`	`printString(String v)`	Prints a string to the stream, encoded as UTF-8
`void`	`printString(String v, int strOffset, int length)`	Prints a string to the stream, encoded as UTF-8
`boolean`	`removeRef(Object obj)`	Removes a reference.
`boolean`	`replaceRef(Object oldRef, Object newRef)`	Replaces a reference from one object to another.
`void`	`reset()`	Resets all counters and references
`void`	`resetReferences()`	Resets the references for streaming.
`void`	`setCloseStreamOnClose(boolean isClose)`
`boolean`	`setUnshared(boolean isUnshared)`	Sets hessian to be "unshared", meaning it will not detect duplicate or circular references.
`void`	`startCall()`	Writes the call tag.
`void`	`startCall(String method, int length)`	Starts the method call.
`void`	`startEnvelope(String method)`	Starts an envelope.
`void`	`startMessage()`	Starts a packet
`void`	`startPacket()`	Starts a streaming packet
`void`	`startReply()`	Starts the reply
`void`	`writeBoolean(boolean value)`	Writes a boolean value to the stream.
`void`	`writeByteBufferEnd(byte[] buffer, int offset, int length)`	Writes a byte buffer to the stream.
`void`	`writeByteBufferPart(byte[] buffer, int offset, int length)`	Writes a byte buffer to the stream.
`void`	`writeByteBufferStart()`	Writes a byte buffer to the stream.
`void`	`writeBytes(byte[] buffer)`	Writes a byte array to the stream.
`void`	`writeBytes(byte[] buffer, int offset, int length)`	Writes a byte array to the stream.
`void`	`writeByteStream(InputStream is)`	Writes a full output stream.
`void`	`writeClassFieldLength(int len)`	Writes the tail of the class definition to the stream.
`void`	`writeDouble(double value)`	Writes a double value to the stream.
`void`	`writeFault(String code, String message, Object detail)`	Writes a fault.
`void`	`writeInt(int value)`	Writes an integer value to the stream.
`boolean`	`writeListBegin(int length, String type)`	Writes the list header to the stream.
`void`	`writeListEnd()`	Writes the tail of the list to the stream for a variable-length list.
`void`	`writeLong(long value)`	Writes a long value to the stream.
`void`	`writeMapBegin(String type)`	Writes the map header to the stream.
`void`	`writeMapEnd()`	Writes the tail of the map to the stream.
`void`	`writeMethod(String method)`	Writes the method tag.
`void`	`writeNull()`	Writes a null value to the stream.
`void`	`writeObject(Object object)`	Writes any object to the output stream.
`int`	`writeObjectBegin(String type)`	Writes the object definition
`void`	`writeObjectEnd()`	Writes the tail of the object definition to the stream.
`protected void`	`writeRef(int value)`	Writes a reference.
`void`	`writeStreamingObject(Object obj)`	Starts the streaming message
`void`	`writeString(char[] buffer, int offset, int length)`	Writes a string value to the stream using UTF-8 encoding.
`void`	`writeString(String value)`	Writes a string value to the stream using UTF-8 encoding.
`void`	`writeUTCDate(long time)`	Writes a date to the stream.
`void`	`writeVersion()`

Methods inherited from class com.caucho.hessian.io.AbstractHessianOutput
findSerializerFactory, getSerializerFactory, setSerializerFactory, writeHeader, writeReply

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - SIZE
```
public static final int SIZE
```
    See Also:
    
    Constant Field Values
  - _os
```
protected OutputStream _os
```
- Constructor Detail
  - Hessian2Output
```
public Hessian2Output()
```
    Creates a new Hessian output stream, initialized with an underlying output stream.
    
    Parameters:
    
    os - the underlying output stream.
  - Hessian2Output
```
public Hessian2Output(OutputStream os)
```
    Creates a new Hessian output stream, initialized with an underlying output stream.
    
    Parameters:
    
    os - the underlying output stream.
- Method Detail
  - init
```
public void init(OutputStream os)
```
    Description copied from class: AbstractHessianOutput
    
    Initialize the output with a new underlying stream.
    
    Overrides:
    
    init in class AbstractHessianOutput
  - initPacket
```
public void initPacket(OutputStream os)
```
  - setCloseStreamOnClose
```
public void setCloseStreamOnClose(boolean isClose)
```
  - isCloseStreamOnClose
```
public boolean isCloseStreamOnClose()
```
  - setUnshared
```
public boolean setUnshared(boolean isUnshared)
```
    Sets hessian to be "unshared", meaning it will not detect duplicate or circular references.
    
    Overrides:
    
    setUnshared in class AbstractHessianOutput
  - call
```
public void call(String method,
                 Object[] args)
          throws IOException
```
    Writes a complete method call.
    
    Overrides:
    
    call in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - startCall
```
public void startCall(String method,
                      int length)
               throws IOException
```
    Starts the method call. Clients would use startCall instead of call if they wanted finer control over writing the arguments, or needed to write headers. C string # method name int # arg count
    Specified by:
    
    startCall in class AbstractHessianOutput
    
    Parameters:
    
    method - the method name to call.
    
    Throws:
    
    IOException
  - startCall
```
public void startCall()
               throws IOException
```
    Writes the call tag. This would be followed by the method and the arguments C
    Specified by:
    
    startCall in class AbstractHessianOutput
    
    Parameters:
    
    method - the method name to call.
    
    Throws:
    
    IOException
  - startEnvelope
```
public void startEnvelope(String method)
                   throws IOException
```
    Starts an envelope. E major minor m b16 b8 method-name
    Parameters:
    
    method - the method name to call.
    
    Throws:
    
    IOException
  - completeEnvelope
```
public void completeEnvelope()
                      throws IOException
```
    Completes an envelope.
    A successful completion will have a single value:
    Z
    Throws:
    
    IOException
  - writeMethod
```
public void writeMethod(String method)
                 throws IOException
```
    Writes the method tag. string
    Specified by:
    
    writeMethod in class AbstractHessianOutput
    
    Parameters:
    
    method - the method name to call.
    
    Throws:
    
    IOException
  - completeCall
```
public void completeCall()
                  throws IOException
```
    Completes. z
    Specified by:
    
    completeCall in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - startReply
```
public void startReply()
                throws IOException
```
    Starts the reply
    A successful completion will have a single value:
    R
    Overrides:
    
    startReply in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - writeVersion
```
public void writeVersion()
                  throws IOException
```
    Throws:
    
    IOException
  - completeReply
```
public void completeReply()
                   throws IOException
```
    Completes reading the reply
    A successful completion will have a single value:
    z
    Overrides:
    
    completeReply in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - startMessage
```
public void startMessage()
                  throws IOException
```
    Starts a packet
    A message contains several objects encapsulated by a length
    
    p x02 x00
    Throws:
    
    IOException
  - completeMessage
```
public void completeMessage()
                     throws IOException
```
    Completes reading the message
    A successful completion will have a single value:
    z
    Throws:
    
    IOException
  - writeFault
```
public void writeFault(String code,
                       String message,
                       Object detail)
                throws IOException
```
    Writes a fault. The fault will be written as a descriptive string followed by an object: F map F H \x04code \x10the fault code \x07message \x11the fault message \x06detail M\xnnjavax.ejb.FinderException ... Z Z
    Overrides:
    
    writeFault in class AbstractHessianOutput
    
    Parameters:
    
    code - the fault code, a three digit
    
    Throws:
    
    IOException
  - writeObject
```
public void writeObject(Object object)
                 throws IOException
```
    Writes any object to the output stream.
    
    Specified by:
    
    writeObject in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - writeListBegin
```
public boolean writeListBegin(int length,
                              String type)
                       throws IOException
```
    Writes the list header to the stream. List writers will call writeListBegin followed by the list contents and then call writeListEnd. list ::= V type value* Z ::= v type int value*
    Specified by:
    
    writeListBegin in class AbstractHessianOutput
    
    Returns:
    
    true for variable lists, false for fixed lists
    
    Throws:
    
    IOException
  - writeListEnd
```
public void writeListEnd()
                  throws IOException
```
    Writes the tail of the list to the stream for a variable-length list.
    
    Specified by:
    
    writeListEnd in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - writeMapBegin
```
public void writeMapBegin(String type)
                   throws IOException
```
    Writes the map header to the stream. Map writers will call writeMapBegin followed by the map contents and then call writeMapEnd. map ::= M type ( )* Z ::= H ( )* Z
    Specified by:
    
    writeMapBegin in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - writeMapEnd
```
public void writeMapEnd()
                 throws IOException
```
    Writes the tail of the map to the stream.
    
    Specified by:
    
    writeMapEnd in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - writeObjectBegin
```
public int writeObjectBegin(String type)
                     throws IOException
```
    Writes the object definition C <string> <int> <string>*
    Overrides:
    
    writeObjectBegin in class AbstractHessianOutput
    
    Returns:
    
    true if the object has already been defined.
    
    Throws:
    
    IOException
  - writeClassFieldLength
```
public void writeClassFieldLength(int len)
                           throws IOException
```
    Writes the tail of the class definition to the stream.
    
    Overrides:
    
    writeClassFieldLength in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - writeObjectEnd
```
public void writeObjectEnd()
                    throws IOException
```
    Writes the tail of the object definition to the stream.
    
    Overrides:
    
    writeObjectEnd in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - writeBoolean
```
public void writeBoolean(boolean value)
                  throws IOException
```
    Writes a boolean value to the stream. The boolean will be written with the following syntax: T F
    Specified by:
    
    writeBoolean in class AbstractHessianOutput
    
    Parameters:
    
    value - the boolean value to write.
    
    Throws:
    
    IOException
  - writeInt
```
public void writeInt(int value)
              throws IOException
```
    Writes an integer value to the stream. The integer will be written with the following syntax: I b32 b24 b16 b8
    Specified by:
    
    writeInt in class AbstractHessianOutput
    
    Parameters:
    
    value - the integer value to write.
    
    Throws:
    
    IOException
  - writeLong
```
public void writeLong(long value)
               throws IOException
```
    Writes a long value to the stream. The long will be written with the following syntax: L b64 b56 b48 b40 b32 b24 b16 b8
    Specified by:
    
    writeLong in class AbstractHessianOutput
    
    Parameters:
    
    value - the long value to write.
    
    Throws:
    
    IOException
  - writeDouble
```
public void writeDouble(double value)
                 throws IOException
```
    Writes a double value to the stream. The double will be written with the following syntax: D b64 b56 b48 b40 b32 b24 b16 b8
    Specified by:
    
    writeDouble in class AbstractHessianOutput
    
    Parameters:
    
    value - the double value to write.
    
    Throws:
    
    IOException
  - writeUTCDate
```
public void writeUTCDate(long time)
                  throws IOException
```
    Writes a date to the stream. date ::= d b7 b6 b5 b4 b3 b2 b1 b0 ::= x65 b3 b2 b1 b0
    Specified by:
    
    writeUTCDate in class AbstractHessianOutput
    
    Parameters:
    
    time - the date in milliseconds from the epoch in UTC
    
    Throws:
    
    IOException
  - writeNull
```
public void writeNull()
               throws IOException
```
    Writes a null value to the stream. The null will be written with the following syntax N
    Specified by:
    
    writeNull in class AbstractHessianOutput
    
    Parameters:
    
    value - the string value to write.
    
    Throws:
    
    IOException
  - writeString
```
public void writeString(String value)
                 throws IOException
```
    Writes a string value to the stream using UTF-8 encoding. The string will be written with the following syntax: S b16 b8 string-value If the value is null, it will be written as N
    Specified by:
    
    writeString in class AbstractHessianOutput
    
    Parameters:
    
    value - the string value to write.
    
    Throws:
    
    IOException
  - writeString
```
public void writeString(char[] buffer,
                        int offset,
                        int length)
                 throws IOException
```
    Writes a string value to the stream using UTF-8 encoding. The string will be written with the following syntax: S b16 b8 string-value If the value is null, it will be written as N
    Specified by:
    
    writeString in class AbstractHessianOutput
    
    Parameters:
    
    value - the string value to write.
    
    Throws:
    
    IOException
  - writeBytes
```
public void writeBytes(byte[] buffer)
                throws IOException
```
    Writes a byte array to the stream. The array will be written with the following syntax: B b16 b18 bytes If the value is null, it will be written as N
    Specified by:
    
    writeBytes in class AbstractHessianOutput
    
    Parameters:
    
    value - the string value to write.
    
    Throws:
    
    IOException
  - writeBytes
```
public void writeBytes(byte[] buffer,
                       int offset,
                       int length)
                throws IOException
```
    Writes a byte array to the stream. The array will be written with the following syntax: B b16 b18 bytes If the value is null, it will be written as N
    Specified by:
    
    writeBytes in class AbstractHessianOutput
    
    Parameters:
    
    value - the string value to write.
    
    Throws:
    
    IOException
  - writeByteBufferStart
```
public void writeByteBufferStart()
                          throws IOException
```
    Writes a byte buffer to the stream.
    Specified by:
    
    writeByteBufferStart in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - writeByteBufferPart
```
public void writeByteBufferPart(byte[] buffer,
                                int offset,
                                int length)
                         throws IOException
```
    Writes a byte buffer to the stream. b b16 b18 bytes
    Specified by:
    
    writeByteBufferPart in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - writeByteBufferEnd
```
public void writeByteBufferEnd(byte[] buffer,
                               int offset,
                               int length)
                        throws IOException
```
    Writes a byte buffer to the stream. b b16 b18 bytes
    Specified by:
    
    writeByteBufferEnd in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - getBytesOutputStream
```
public OutputStream getBytesOutputStream()
                                  throws IOException
```
    Returns an output stream to write binary data.
    
    Throws:
    
    IOException
  - writeByteStream
```
public void writeByteStream(InputStream is)
                     throws IOException
```
    Writes a full output stream.
    
    Overrides:
    
    writeByteStream in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - writeRef
```
protected void writeRef(int value)
                 throws IOException
```
    Writes a reference. x51 <int>
    Specified by:
    
    writeRef in class AbstractHessianOutput
    
    Parameters:
    
    value - the integer value to write.
    
    Throws:
    
    IOException
  - addRef
```
public boolean addRef(Object object)
               throws IOException
```
    If the object has already been written, just write its ref.
    
    Specified by:
    
    addRef in class AbstractHessianOutput
    
    Parameters:
    
    object - the object to add as a reference.
    
    Returns:
    
    true if we're writing a ref.
    
    Throws:
    
    IOException
  - getRef
```
public int getRef(Object obj)
```
    Specified by:
    
    getRef in class AbstractHessianOutput
    
    Returns:
  - removeRef
```
public boolean removeRef(Object obj)
                  throws IOException
```
    Removes a reference.
    
    Overrides:
    
    removeRef in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - replaceRef
```
public boolean replaceRef(Object oldRef,
                          Object newRef)
                   throws IOException
```
    Replaces a reference from one object to another.
    
    Specified by:
    
    replaceRef in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - writeStreamingObject
```
public void writeStreamingObject(Object obj)
                          throws IOException
```
    Starts the streaming message
    A streaming message starts with 'P'
    
    P x02 x00
    Throws:
    
    IOException
  - startPacket
```
public void startPacket()
                 throws IOException
```
    Starts a streaming packet
    A streaming contains a set of chunks, ending with a zero chunk. Each chunk is a length followed by data where the length is encoded by (b1xxxxxxxx)* b0xxxxxxxx
    
    Throws:
    
    IOException
  - endPacket
```
public void endPacket()
               throws IOException
```
    Throws:
    
    IOException
  - printLenString
```
public void printLenString(String v)
                    throws IOException
```
    Prints a string to the stream, encoded as UTF-8 with preceeding length
    
    Parameters:
    
    v - the string to print.
    
    Throws:
    
    IOException
  - printString
```
public void printString(String v)
                 throws IOException
```
    Prints a string to the stream, encoded as UTF-8
    
    Parameters:
    
    v - the string to print.
    
    Throws:
    
    IOException
  - printString
```
public void printString(String v,
                        int strOffset,
                        int length)
                 throws IOException
```
    Prints a string to the stream, encoded as UTF-8
    
    Parameters:
    
    v - the string to print.
    
    Throws:
    
    IOException
  - printString
```
public void printString(char[] v,
                        int strOffset,
                        int length)
                 throws IOException
```
    Prints a string to the stream, encoded as UTF-8
    
    Parameters:
    
    v - the string to print.
    
    Throws:
    
    IOException
  - flush
```
public final void flush()
                 throws IOException
```
    Overrides:
    
    flush in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - flushBuffer
```
public final void flushBuffer()
                       throws IOException
```
    Throws:
    
    IOException
  - close
```
public void close()
           throws IOException
```
    Overrides:
    
    close in class AbstractHessianOutput
    
    Throws:
    
    IOException
  - free
```
public void free()
```
  - resetReferences
```
public void resetReferences()
```
    Resets the references for streaming.
    
    Overrides:
    
    resetReferences in class AbstractHessianOutput
  - reset
```
public void reset()
```
    Resets all counters and references

Fields
Modifier and Type	Field	Description
`protected OutputStream`	`_os`
`static int`	`SIZE`

Class Hessian2Output

Field Summary

Fields inherited from class com.caucho.hessian.io.AbstractHessianOutput

Fields inherited from interface com.caucho.hessian.io.Hessian2Constants

Constructor Summary

Method Summary

Methods inherited from class com.caucho.hessian.io.AbstractHessianOutput

Methods inherited from class java.lang.Object

Field Detail

SIZE

_os

Constructor Detail

Hessian2Output

Hessian2Output

Method Detail

init

initPacket

setCloseStreamOnClose

isCloseStreamOnClose

setUnshared

call

startCall

startCall

startEnvelope

completeEnvelope

writeMethod

completeCall

startReply

writeVersion

completeReply

startMessage

completeMessage

writeFault

writeObject

writeListBegin

writeListEnd

writeMapBegin

writeMapEnd

writeObjectBegin

writeClassFieldLength

writeObjectEnd

writeBoolean

writeInt

writeLong

writeDouble

writeUTCDate

writeNull

writeString

writeString

writeBytes

writeBytes

writeByteBufferStart

writeByteBufferPart

writeByteBufferEnd

getBytesOutputStream

writeByteStream

writeRef

addRef

getRef

removeRef

replaceRef

writeStreamingObject

startPacket

endPacket

printLenString

printString

printString

printString

flush

flushBuffer

close

free

resetReferences

reset