com.caucho.burlap.client
Class MicroBurlapInput

java.lang.Object
  com.caucho.burlap.client.MicroBurlapInput

public class MicroBurlapInput
extends Object

Input stream for Burlap requests, compatible with microedition Java. It only uses classes and types available to J2ME. In particular, it does not have any support for the <double> type.

MicroBurlapInput does not depend on any classes other than in J2ME, so it can be extracted independently into a smaller package.

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

 InputStream is = ...; // from http connection
 MicroBurlapInput in = new MicroBurlapInput(is);
 String value;

 in.startReply();         // read reply header
 value = in.readString(); // read string value
 in.completeReply();      // read reply footer
 

Field Summary

protected Date	date
protected StringBuffer	entity
protected String	method
protected int	peek
protected boolean	peekTag
protected Vector	refs
protected StringBuffer	sbuf
protected Calendar	utcCalendar

Constructor Summary

MicroBurlapInput()
Creates an uninitialized Burlap input stream.

MicroBurlapInput(InputStream is)
Creates a new Burlap input stream, initialized with an underlying input stream.

Method Summary

void	completeCall() Completes reading the call.
void	completeReply() Completes reading the reply.
protected IOException	expectBeginTag(String expect, String tag)
protected IOException	expectedChar(String expect, int actualChar)
protected void	expectEndTag(String tag)
protected void	expectStartTag(String tag)
String	getMethod() Returns a call's method.
void	init(InputStream is) Initialize the Burlap input stream with a new underlying stream.
protected boolean	isWhitespace(int ch)
protected byte[]	parseBytes() Parses a byte array.
protected ByteArrayOutputStream	parseBytes(ByteArrayOutputStream bos) Parses a byte array.
protected long	parseDate(Calendar calendar) Parses a date value from the stream.
protected int	parseInt() Parses an integer value from the stream.
protected long	parseLong() Parses a long value from the stream.
protected String	parseString() Parses a string value from the stream.
protected StringBuffer	parseString(StringBuffer sbuf) Parses a string value from the stream.
protected boolean	parseTag() Parses a tag.
protected int	read()
boolean	readBoolean() Reads a boolean value from the input stream.
byte[]	readBytes() Reads a byte array from the input stream.
protected Object	readExtensionObject(Class expectedClass, String tag) Reads object unknown to MicroBurlapInput.
Hashtable	readFault() Reads a fault.
int	readInt() Reads an integer value from the input stream.
int	readLength() Reads a length value from the input stream.
Object	readList(Class expectedClass, String type, int length) Reads a list object from the input stream.
long	readLocalDate() Reads a date value from the input stream.
long	readLong() Reads a long value from the input stream.
Object	readMap(Class expectedClass, String type) Reads an object from the input stream.
Object	readObject(Class expectedClass) Reads an arbitrary object the input stream.
BurlapRemote	readRemote() Reads a remote value from the input stream.
Object	readReply(Class expectedClass) Reads a reply as an object.
String	readString() Reads a string value from the input stream.
String	readType() Reads a type value from the input stream.
long	readUTCDate() Reads a date value from the input stream.
Object	resolveRemote(String type, String url) Resolves a remote object.
protected int	skipWhitespace()
void	startCall() Starts reading the call A successful completion will have a single value: <burlap:call> <method>method</method>
boolean	startReply() Starts reading the reply.

Methods inherited from class java.lang.Object

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

Field Detail

peek

protected int peek

peekTag

protected boolean peekTag

date

protected Date date

utcCalendar

protected Calendar utcCalendar

refs

protected Vector refs

method

protected String method

sbuf

protected StringBuffer sbuf

entity

protected StringBuffer entity

Constructor Detail

MicroBurlapInput

public MicroBurlapInput(InputStream is)

Creates a new Burlap input stream, initialized with an underlying input stream.

Parameters:

is - the underlying input stream.

MicroBurlapInput

public MicroBurlapInput()

Creates an uninitialized Burlap input stream.

Method Detail

getMethod

public String getMethod()

Returns a call's method.

init

public void init(InputStream is)

Initialize the Burlap input stream with a new underlying stream. Applications can use init(InputStream) to reuse MicroBurlapInput to save garbage collection.

startCall

public void startCall()
               throws IOException

Starts reading the call

A successful completion will have a single value:

 <burlap:call>
 <method>method</method>
 

Throws:

IOException

completeCall

public void completeCall()
                  throws IOException

Completes reading the call.

 </burlap:call>
 

Throws:

IOException

readReply

public Object readReply(Class expectedClass)
                 throws Exception

Reads a reply as an object. If the reply has a fault, throws the exception.

Throws:

Exception

startReply

public boolean startReply()
                   throws IOException

Starts reading the reply.

A successful completion will have a single value. An unsuccessful one will have a fault:

 <burlap:reply>
 

Returns:

true if success, false for fault.

Throws:

IOException

completeReply

public void completeReply()
                   throws IOException

Completes reading the reply.

 </burlap:reply>
 

Throws:

IOException

readBoolean

public boolean readBoolean()
                    throws IOException

Reads a boolean value from the input stream.

Throws:

IOException

readInt

public int readInt()
            throws IOException

Reads an integer value from the input stream.

Throws:

IOException

readLong

public long readLong()
              throws IOException

Reads a long value from the input stream.

Throws:

IOException

readUTCDate

public long readUTCDate()
                 throws IOException

Reads a date value from the input stream.

Throws:

IOException

readLocalDate

public long readLocalDate()
                   throws IOException

Reads a date value from the input stream.

Throws:

IOException

readRemote

public BurlapRemote readRemote()
                        throws IOException

Reads a remote value from the input stream.

Throws:

IOException

readString

public String readString()
                  throws IOException

Reads a string value from the input stream.

The two valid possibilities are either a <null> or a <string>. The string value is encoded in utf-8, and understands the basic XML escapes: "&123;", "<", ">", "'", """.

 <null></null>
 <string>a utf-8 encoded string</string>
 

Throws:

IOException

readBytes

public byte[] readBytes()
                 throws IOException

Reads a byte array from the input stream.

The two valid possibilities are either a <null> or a <base64>.

Throws:

IOException

readObject

public Object readObject(Class expectedClass)
                  throws IOException

Reads an arbitrary object the input stream.

Throws:

IOException

readType

public String readType()
                throws IOException

Reads a type value from the input stream.

 <type>a utf-8 encoded string</type>
 

Throws:

IOException

readLength

public int readLength()
               throws IOException

Reads a length value from the input stream. If the length isn't specified, returns -1.

 <length>integer</length>
 

Throws:

IOException

resolveRemote

public Object resolveRemote(String type,
                            String url)
                     throws IOException

Resolves a remote object.

Throws:

IOException

readFault

public Hashtable readFault()
                    throws IOException

Reads a fault.

Throws:

IOException

readMap

public Object readMap(Class expectedClass,
                      String type)
               throws IOException

Reads an object from the input stream.

Parameters:

expectedClass - the calling routine's expected class

type - the type from the stream

Throws:

IOException

readExtensionObject

protected Object readExtensionObject(Class expectedClass,
                                     String tag)
                              throws IOException

Reads object unknown to MicroBurlapInput.

Throws:

IOException

readList

public Object readList(Class expectedClass,
                       String type,
                       int length)
                throws IOException

Reads a list object from the input stream.

Parameters:

expectedClass - the calling routine's expected class

type - the type from the stream

length - the expected length, -1 for unspecified length

Throws:

IOException

parseInt

protected int parseInt()
                throws IOException

Parses an integer value from the stream.

Throws:

IOException

parseLong

protected long parseLong()
                  throws IOException

Parses a long value from the stream.

Throws:

IOException

parseDate

protected long parseDate(Calendar calendar)
                  throws IOException

Parses a date value from the stream.

Throws:

IOException

parseString

protected String parseString()
                      throws IOException

Parses a string value from the stream. string buffer is used for the result.

Throws:

IOException

parseString

protected StringBuffer parseString(StringBuffer sbuf)
                            throws IOException

Parses a string value from the stream. The burlap object's string buffer is used for the result.

Throws:

IOException

parseBytes

protected byte[] parseBytes()
                     throws IOException

Parses a byte array.

Throws:

IOException

parseBytes

protected ByteArrayOutputStream parseBytes(ByteArrayOutputStream bos)
                                    throws IOException

Parses a byte array.

Throws:

IOException

expectStartTag

protected void expectStartTag(String tag)
                       throws IOException

Throws:

IOException

expectEndTag

protected void expectEndTag(String tag)
                     throws IOException

Throws:

IOException

parseTag

protected boolean parseTag()
                    throws IOException

Parses a tag. Returns true if it's a start tag.

Throws:

IOException

expectedChar

protected IOException expectedChar(String expect,
                                   int actualChar)

expectBeginTag

protected IOException expectBeginTag(String expect,
                                     String tag)

skipWhitespace

protected int skipWhitespace()
                      throws IOException

Throws:

IOException

isWhitespace

protected boolean isWhitespace(int ch)
                        throws IOException

Throws:

IOException

read

protected int read()
            throws IOException

Throws:

IOException