/*
* Copyright (c) 2001-2004 Caucho Technology, Inc. All rights reserved.
*
* The Apache Software License, Version 1.1
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Caucho Technology (http://www.caucho.com/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "Hessian", "Resin", and "Caucho" must not be used to
* endorse or promote products derived from this software without prior
* written permission. For written permission, please contact
* info@caucho.com.
*
* 5. Products derived from this software may not be called "Resin"
* nor may "Resin" appear in their names without prior written
* permission of Caucho Technology.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @author Scott Ferguson
*/
package com.caucho.hessian.io;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
/**
* Input stream for Hessian requests.
*
* <p>HessianInput is unbuffered, so any client needs to provide
* its own buffering.
*
* <pre>
* InputStream is = ...; // from http connection
* HessianInput in = new HessianInput(is);
* String value;
*
* in.startReply(); // read reply header
* value = in.readString(); // read string value
* in.completeReply(); // read reply footer
* </pre>
*/
public class HessianInput extends AbstractHessianInput {
private static int END_OF_DATA = -2;
private static Field _detailMessageField;
// factory for deserializing objects in the input stream
protected SerializerFactory _serializerFactory;
protected ArrayList _refs;
// the underlying input stream
private InputStream _is;
// a peek character
protected int _peek = -1;
// the method for a call
private String _method;
private Reader _chunkReader;
private InputStream _chunkInputStream;
private Throwable _replyFault;
private StringBuffer _sbuf = new StringBuffer();
// true if this is the last chunk
private boolean _isLastChunk;
// the chunk length
private int _chunkLength;
/**
* Creates an uninitialized Hessian input stream.
*/
public HessianInput()
{
}
/**
* Creates a new Hessian input stream, initialized with an
* underlying input stream.
*
* @param is the underlying input stream.
*/
public HessianInput(InputStream is)
{
init(is);
}
/**
* Sets the serializer factory.
*/
public void setSerializerFactory(SerializerFactory factory)
{
_serializerFactory = factory;
}
/**
* Gets the serializer factory.
*/
public SerializerFactory getSerializerFactory()
{
return _serializerFactory;
}
/**
* Initialize the hessian stream with the underlying input stream.
*/
public void init(InputStream is)
{
_is = is;
_method = null;
_isLastChunk = true;
_chunkLength = 0;
_peek = -1;
_refs = null;
_replyFault = null;
if (_serializerFactory == null)
_serializerFactory = new SerializerFactory();
}
/**
* Returns the calls method
*/
public String getMethod()
{
return _method;
}
/**
* Returns any reply fault.
*/
public Throwable getReplyFault()
{
return _replyFault;
}
/**
* Starts reading the call
*
* <pre>
* c major minor
* </pre>
*/
public int readCall()
throws IOException
{
int tag = read();
if (tag != 'c')
throw error("expected hessian call ('c') at " + codeName(tag));
int major = read();
int minor = read();
return (major << 16) + minor;
}
/**
* For backward compatibility with HessianSkeleton
*/
public void skipOptionalCall()
throws IOException
{
int tag = read();
if (tag == 'c') {
read();
read();
}
else
_peek = tag;
}
/**
* Starts reading the call
*
* <p>A successful completion will have a single value:
*
* <pre>
* m b16 b8 method
* </pre>
*/
public String readMethod()
throws IOException
{
int tag = read();
if (tag != 'm')
throw error("expected hessian method ('m') at " + codeName(tag));
int d1 = read();
int d2 = read();
_isLastChunk = true;
_chunkLength = d1 * 256 + d2;
_sbuf.setLength(0);
int ch;
while ((ch = parseChar()) >= 0)
_sbuf.append((char) ch);
_method = _sbuf.toString();
return _method;
}
/**
* Starts reading the call, including the headers.
*
* <p>The call expects the following protocol data
*
* <pre>
* c major minor
* m b16 b8 method
* </pre>
*/
public void startCall()
throws IOException
{
readCall();
while (readHeader() != null) {
readObject();
}
readMethod();
}
/**
* Completes reading the call
*
* <p>A successful completion will have a single value:
*
* <pre>
* z
* </pre>
*/
public void completeCall()
throws IOException
{
int tag = read();
if (tag == 'z') {
}
else
throw error("expected end of call ('z') at " + codeName(tag) + ". Check method arguments and ensure method overloading is enabled if necessary");
}
/**
* Reads a reply as an object.
* If the reply has a fault, throws the exception.
*/
public Object readReply(Class expectedClass)
throws Throwable
{
int tag = read();
if (tag != 'r')
error("expected hessian reply at " + codeName(tag));
int major = read();
int minor = read();
tag = read();
if (tag == 'f')
throw prepareFault();
else {
_peek = tag;
Object value = readObject(expectedClass);
completeValueReply();
return value;
}
}
/**
* Starts reading the reply
*
* <p>A successful completion will have a single value:
*
* <pre>
* r
* </pre>
*/
public void startReply()
throws Throwable
{
int tag = read();
if (tag != 'r')
error("expected hessian reply at " + codeName(tag));
int major = read();
int minor = read();
startReplyBody();
}
public void startReplyBody()
throws Throwable
{
int tag = read();
if (tag == 'f')
throw prepareFault();
else
_peek = tag;
}
/**
* Prepares the fault.
*/
private Throwable prepareFault()
throws IOException
{
HashMap fault = readFault();
Object detail = fault.get("detail");
String message = (String) fault.get("message");
if (detail instanceof Throwable) {
_replyFault = (Throwable) detail;
if (message != null && _detailMessageField != null) {
try {
_detailMessageField.set(_replyFault, message);
} catch (Throwable e) {
}
}
return _replyFault;
}
else {
String code = (String) fault.get("code");
_replyFault = new HessianServiceException(message, code, detail);
return _replyFault;
}
}
/**
* Completes reading the call
*
* <p>A successful completion will have a single value:
*
* <pre>
* z
* </pre>
*/
public void completeReply()
throws IOException
{
int tag = read();
if (tag != 'z')
error("expected end of reply at " + codeName(tag));
}
/**
* Completes reading the call
*
* <p>A successful completion will have a single value:
*
* <pre>
* z
* </pre>
*/
public void completeValueReply()
throws IOException
{
int tag = read();
if (tag != 'z')
error("expected end of reply at " + codeName(tag));
}
/**
* Reads a header, returning null if there are no headers.
*
* <pre>
* H b16 b8 value
* </pre>
*/
public String readHeader()
throws IOException
{
int tag = read();
if (tag == 'H') {
_isLastChunk = true;
_chunkLength = (read() << 8) + read();
_sbuf.setLength(0);
int ch;
while ((ch = parseChar()) >= 0)
_sbuf.append((char) ch);
return _sbuf.toString();
}
_peek = tag;
return null;
}
/**
* Reads a null
*
* <pre>
* N
* </pre>
*/
public void readNull()
throws IOException
{
int tag = read();
switch (tag) {
case 'N': return;
default:
throw expect("null", tag);
}
}
/**
* Reads a boolean
*
* <pre>
* T
* F
* </pre>
*/
public boolean readBoolean()
throws IOException
{
int tag = read();
switch (tag) {
case 'T': return true;
case 'F': return false;
case 'I': return parseInt() == 0;
case 'L': return parseLong() == 0;
case 'D': return parseDouble() == 0.0;
case 'N': return false;
default:
throw expect("boolean", tag);
}
}
/**
* Reads a byte
*
* <pre>
* I b32 b24 b16 b8
* </pre>
*/
/*
public byte readByte()
throws IOException
{
return (byte) readInt();
}
*/
/**
* Reads a short
*
* <pre>
* I b32 b24 b16 b8
* </pre>
*/
public short readShort()
throws IOException
{
return (short) readInt();
}
/**
* Reads an integer
*
* <pre>
* I b32 b24 b16 b8
* </pre>
*/
public int readInt()
throws IOException
{
int tag = read();
switch (tag) {
case 'T': return 1;
case 'F': return 0;
case 'I': return parseInt();
case 'L': return (int) parseLong();
case 'D': return (int) parseDouble();
default:
throw expect("int", tag);
}
}
/**
* Reads a long
*
* <pre>
* L b64 b56 b48 b40 b32 b24 b16 b8
* </pre>
*/
public long readLong()
throws IOException
{
int tag = read();
switch (tag) {
case 'T': return 1;
case 'F': return 0;
case 'I': return parseInt();
case 'L': return parseLong();
case 'D': return (long) parseDouble();
default:
throw expect("long", tag);
}
}
/**
* Reads a float
*
* <pre>
* D b64 b56 b48 b40 b32 b24 b16 b8
* </pre>
*/
public float readFloat()
throws IOException
{
return (float) readDouble();
}
/**
* Reads a double
*
* <pre>
* D b64 b56 b48 b40 b32 b24 b16 b8
* </pre>
*/
public double readDouble()
throws IOException
{
int tag = read();
switch (tag) {
case 'T': return 1;
case 'F': return 0;
case 'I': return parseInt();
case 'L': return (double) parseLong();
case 'D': return parseDouble();
default:
throw expect("long", tag);
}
}
/**
* Reads a date.
*
* <pre>
* T b64 b56 b48 b40 b32 b24 b16 b8
* </pre>
*/
public long readUTCDate()
throws IOException
{
int tag = read();
if (tag != 'd')
throw error("expected date at " + codeName(tag));
long b64 = read();
long b56 = read();
long b48 = read();
long b40 = read();
long b32 = read();
long b24 = read();
long b16 = read();
long b8 = read();
return ((b64 << 56) +
(b56 << 48) +
(b48 << 40) +
(b40 << 32) +
(b32 << 24) +
(b24 << 16) +
(b16 << 8) +
b8);
}
/**
* Reads a byte from the stream.
*/
public int readChar()
throws IOException
{
if (_chunkLength > 0) {
_chunkLength--;
if (_chunkLength == 0 && _isLastChunk)
_chunkLength = END_OF_DATA;
int ch = parseUTF8Char();
return ch;
}
else if (_chunkLength == END_OF_DATA) {
_chunkLength = 0;
return -1;
}
int tag = read();
switch (tag) {
case 'N':
return -1;
case 'S':
case 's':
case 'X':
case 'x':
_isLastChunk = tag == 'S' || tag == 'X';
_chunkLength = (read() << 8) + read();
_chunkLength--;
int value = parseUTF8Char();
// special code so successive read byte won't
// be read as a single object.
if (_chunkLength == 0 && _isLastChunk)
_chunkLength = END_OF_DATA;
return value;
default:
throw new IOException("expected 'S' at " + (char) tag);
}
}
/**
* Reads a byte array from the stream.
*/
public int readString(char []buffer, int offset, int length)
throws IOException
{
int readLength = 0;
if (_chunkLength == END_OF_DATA) {
_chunkLength = 0;
return -1;
}
else if (_chunkLength == 0) {
int tag = read();
switch (tag) {
case 'N':
return -1;
case 'S':
case 's':
case 'X':
case 'x':
_isLastChunk = tag == 'S' || tag == 'X';
_chunkLength = (read() << 8) + read();
break;
default:
throw new IOException("expected 'S' at " + (char) tag);
}
}
while (length > 0) {
if (_chunkLength > 0) {
buffer[offset++] = (char) parseUTF8Char();
_chunkLength--;
length--;
readLength++;
}
else if (_isLastChunk) {
if (readLength == 0)
return -1;
else {
_chunkLength = END_OF_DATA;
return readLength;
}
}
else {
int tag = read();
switch (tag) {
case 'S':
case 's':
case 'X':
case 'x':
_isLastChunk = tag == 'S' || tag == 'X';
_chunkLength = (read() << 8) + read();
break;
default:
throw new IOException("expected 'S' at " + (char) tag);
}
}
}
if (readLength == 0)
return -1;
else if (_chunkLength > 0 || ! _isLastChunk)
return readLength;
else {
_chunkLength = END_OF_DATA;
return readLength;
}
}
/**
* Reads a string
*
* <pre>
* S b16 b8 string value
* </pre>
*/
public String readString()
throws IOException
{
int tag = read();
switch (tag) {
case 'N':
return null;
case 'I':
return String.valueOf(parseInt());
case 'L':
return String.valueOf(parseLong());
case 'D':
return String.valueOf(parseDouble());
case 'S':
case 's':
case 'X':
case 'x':
_isLastChunk = tag == 'S' || tag == 'X';
_chunkLength = (read() << 8) + read();
_sbuf.setLength(0);
int ch;
while ((ch = parseChar()) >= 0)
_sbuf.append((char) ch);
return _sbuf.toString();
default:
throw expect("string", tag);
}
}
/**
* Reads an XML node.
*
* <pre>
* S b16 b8 string value
* </pre>
*/
public org.w3c.dom.Node readNode()
throws IOException
{
int tag = read();
switch (tag) {
case 'N':
return null;
case 'S':
case 's':
case 'X':
case 'x':
_isLastChunk = tag == 'S' || tag == 'X';
_chunkLength = (read() << 8) + read();
throw error("Can't handle string in this context");
default:
throw expect("string", tag);
}
}
/**
* Reads a byte array
*
* <pre>
* B b16 b8 data value
* </pre>
*/
public byte []readBytes()
throws IOException
{
int tag = read();
switch (tag) {
case 'N':
return null;
case 'B':
case 'b':
_isLastChunk = tag == 'B';
_chunkLength = (read() << 8) + read();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
int data;
while ((data = parseByte()) >= 0)
bos.write(data);
return bos.toByteArray();
default:
throw expect("bytes", tag);
}
}
/**
* Reads a byte from the stream.
*/
public int readByte()
throws IOException
{
if (_chunkLength > 0) {
_chunkLength--;
if (_chunkLength == 0 && _isLastChunk)
_chunkLength = END_OF_DATA;
return read();
}
else if (_chunkLength == END_OF_DATA) {
_chunkLength = 0;
return -1;
}
int tag = read();
switch (tag) {
case 'N':
return -1;
case 'B':
case 'b':
_isLastChunk = tag == 'B';
_chunkLength = (read() << 8) + read();
int value = parseByte();
// special code so successive read byte won't
// be read as a single object.
if (_chunkLength == 0 && _isLastChunk)
_chunkLength = END_OF_DATA;
return value;
default:
throw new IOException("expected 'B' at " + (char) tag);
}
}
/**
* Reads a byte array from the stream.
*/
public int readBytes(byte []buffer, int offset, int length)
throws IOException
{
int readLength = 0;
if (_chunkLength == END_OF_DATA) {
_chunkLength = 0;
return -1;
}
else if (_chunkLength == 0) {
int tag = read();
switch (tag) {
case 'N':
return -1;
case 'B':
case 'b':
_isLastChunk = tag == 'B';
_chunkLength = (read() << 8) + read();
break;
default:
throw new IOException("expected 'B' at " + (char) tag);
}
}
while (length > 0) {
if (_chunkLength > 0) {
buffer[offset++] = (byte) read();
_chunkLength--;
length--;
readLength++;
}
else if (_isLastChunk) {
if (readLength == 0)
return -1;
else {
_chunkLength = END_OF_DATA;
return readLength;
}
}
else {
int tag = read();
switch (tag) {
case 'B':
case 'b':
_isLastChunk = tag == 'B';
_chunkLength = (read() << 8) + read();
break;
default:
throw new IOException("expected 'B' at " + (char) tag);
}
}
}
if (readLength == 0)
return -1;
else if (_chunkLength > 0 || ! _isLastChunk)
return readLength;
else {
_chunkLength = END_OF_DATA;
return readLength;
}
}
/**
* Reads a fault.
*/
private HashMap readFault()
throws IOException
{
HashMap map = new HashMap();
int code = read();
for (; code > 0 && code != 'z'; code = read()) {
_peek = code;
Object key = readObject();
Object value = readObject();
if (key != null && value != null)
map.put(key, value);
}
if (code != 'z')
throw expect("fault", code);
return map;
}
/**
* Reads an object from the input stream with an expected type.
*/
public Object readObject(Class cl)
throws IOException
{
if (cl == null || cl == Object.class)
return readObject();
int tag = read();
switch (tag) {
case 'N':
return null;
case 'M':
{
String type = readType();
// hessian/3386
if ("".equals(type)) {
Deserializer reader;
reader = _serializerFactory.getDeserializer(cl);
return reader.readMap(this);
}
else {
Deserializer reader;
reader = _serializerFactory.getObjectDeserializer(type);
return reader.readMap(this);
}
}
case 'V':
{
String type = readType();
int length = readLength();
Deserializer reader;
reader = _serializerFactory.getObjectDeserializer(type);
if (cl != reader.getType() && cl.isAssignableFrom(reader.getType()))
return reader.readList(this, length);
reader = _serializerFactory.getDeserializer(cl);
Object v = reader.readList(this, length);
return v;
}
case 'R':
{
int ref = parseInt();
return _refs.get(ref);
}
case 'r':
{
String type = readType();
String url = readString();
return resolveRemote(type, url);
}
}
_peek = tag;
// hessian/332i vs hessian/3406
//return readObject();
Object value = _serializerFactory.getDeserializer(cl).readObject(this);
return value;
}
/**
* Reads an arbitrary object from the input stream when the type
* is unknown.
*/
public Object readObject()
throws IOException
{
int tag = read();
switch (tag) {
case 'N':
return null;
case 'T':
return Boolean.valueOf(true);
case 'F':
return Boolean.valueOf(false);
case 'I':
return Integer.valueOf(parseInt());
case 'L':
return Long.valueOf(parseLong());
case 'D':
return Double.valueOf(parseDouble());
case 'd':
return new Date(parseLong());
case 'x':
case 'X': {
_isLastChunk = tag == 'X';
_chunkLength = (read() << 8) + read();
return parseXML();
}
case 's':
case 'S': {
_isLastChunk = tag == 'S';
_chunkLength = (read() << 8) + read();
int data;
_sbuf.setLength(0);
while ((data = parseChar()) >= 0)
_sbuf.append((char) data);
return _sbuf.toString();
}
case 'b':
case 'B': {
_isLastChunk = tag == 'B';
_chunkLength = (read() << 8) + read();
int data;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
while ((data = parseByte()) >= 0)
bos.write(data);
return bos.toByteArray();
}
case 'V': {
String type = readType();
int length = readLength();
return _serializerFactory.readList(this, length, type);
}
case 'M': {
String type = readType();
return _serializerFactory.readMap(this, type);
}
case 'R': {
int ref = parseInt();
return _refs.get(ref);
}
case 'r': {
String type = readType();
String url = readString();
return resolveRemote(type, url);
}
default:
throw error("unknown code for readObject at " + codeName(tag));
}
}
/**
* Reads a remote object.
*/
public Object readRemote()
throws IOException
{
String type = readType();
String url = readString();
return resolveRemote(type, url);
}
/**
* Reads a reference.
*/
public Object readRef()
throws IOException
{
return _refs.get(parseInt());
}
/**
* Reads the start of a list.
*/
public int readListStart()
throws IOException
{
return read();
}
/**
* Reads the start of a list.
*/
public int readMapStart()
throws IOException
{
return read();
}
/**
* Returns true if this is the end of a list or a map.
*/
public boolean isEnd()
throws IOException
{
int code = read();
_peek = code;
return (code < 0 || code == 'z');
}
/**
* Reads the end byte.
*/
public void readEnd()
throws IOException
{
int code = read();
if (code != 'z')
throw error("unknown code at " + codeName(code));
}
/**
* Reads the end byte.
*/
public void readMapEnd()
throws IOException
{
int code = read();
if (code != 'z')
throw error("expected end of map ('z') at " + codeName(code));
}
/**
* Reads the end byte.
*/
public void readListEnd()
throws IOException
{
int code = read();
if (code != 'z')
throw error("expected end of list ('z') at " + codeName(code));
}
/**
* Adds a list/map reference.
*/
public int addRef(Object ref)
{
if (_refs == null)
_refs = new ArrayList();
_refs.add(ref);
return _refs.size() - 1;
}
/**
* Adds a list/map reference.
*/
public void setRef(int i, Object ref)
{
_refs.set(i, ref);
}
/**
* Resets the references for streaming.
*/
public void resetReferences()
{
if (_refs != null)
_refs.clear();
}
/**
* Resolves a remote object.
*/
public Object resolveRemote(String type, String url)
throws IOException
{
HessianRemoteResolver resolver = getRemoteResolver();
if (resolver != null)
return resolver.lookup(type, url);
else
return new HessianRemote(type, url);
}
/**
* Parses a type from the stream.
*
* <pre>
* t b16 b8
* </pre>
*/
public String readType()
throws IOException
{
int code = read();
if (code != 't') {
_peek = code;
return "";
}
_isLastChunk = true;
_chunkLength = (read() << 8) + read();
_sbuf.setLength(0);
int ch;
while ((ch = parseChar()) >= 0)
_sbuf.append((char) ch);
return _sbuf.toString();
}
/**
* Parses the length for an array
*
* <pre>
* l b32 b24 b16 b8
* </pre>
*/
public int readLength()
throws IOException
{
int code = read();
if (code != 'l') {
_peek = code;
return -1;
}
return parseInt();
}
/**
* Parses a 32-bit integer value from the stream.
*
* <pre>
* b32 b24 b16 b8
* </pre>
*/
private int parseInt()
throws IOException
{
int b32 = read();
int b24 = read();
int b16 = read();
int b8 = read();
return (b32 << 24) + (b24 << 16) + (b16 << 8) + b8;
}
/**
* Parses a 64-bit long value from the stream.
*
* <pre>
* b64 b56 b48 b40 b32 b24 b16 b8
* </pre>
*/
private long parseLong()
throws IOException
{
long b64 = read();
long b56 = read();
long b48 = read();
long b40 = read();
long b32 = read();
long b24 = read();
long b16 = read();
long b8 = read();
return ((b64 << 56) +
(b56 << 48) +
(b48 << 40) +
(b40 << 32) +
(b32 << 24) +
(b24 << 16) +
(b16 << 8) +
b8);
}
/**
* Parses a 64-bit double value from the stream.
*
* <pre>
* b64 b56 b48 b40 b32 b24 b16 b8
* </pre>
*/
private double parseDouble()
throws IOException
{
long b64 = read();
long b56 = read();
long b48 = read();
long b40 = read();
long b32 = read();
long b24 = read();
long b16 = read();
long b8 = read();
long bits = ((b64 << 56) +
(b56 << 48) +
(b48 << 40) +
(b40 << 32) +
(b32 << 24) +
(b24 << 16) +
(b16 << 8) +
b8);
return Double.longBitsToDouble(bits);
}
org.w3c.dom.Node parseXML()
throws IOException
{
throw new UnsupportedOperationException();
}
/**
* Reads a character from the underlying stream.
*/
private int parseChar()
throws IOException
{
while (_chunkLength <= 0) {
if (_isLastChunk)
return -1;
int code = read();
switch (code) {
case 's':
case 'x':
_isLastChunk = false;
_chunkLength = (read() << 8) + read();
break;
case 'S':
case 'X':
_isLastChunk = true;
_chunkLength = (read() << 8) + read();
break;
default:
throw expect("string", code);
}
}
_chunkLength--;
return parseUTF8Char();
}
/**
* Parses a single UTF8 character.
*/
private int parseUTF8Char()
throws IOException
{
int ch = read();
if (ch < 0x80)
return ch;
else if ((ch & 0xe0) == 0xc0) {
int ch1 = read();
int v = ((ch & 0x1f) << 6) + (ch1 & 0x3f);
return v;
}
else if ((ch & 0xf0) == 0xe0) {
int ch1 = read();
int ch2 = read();
int v = ((ch & 0x0f) << 12) + ((ch1 & 0x3f) << 6) + (ch2 & 0x3f);
return v;
}
else
throw error("bad utf-8 encoding at " + codeName(ch));
}
/**
* Reads a byte from the underlying stream.
*/
private int parseByte()
throws IOException
{
while (_chunkLength <= 0) {
if (_isLastChunk) {
return -1;
}
int code = read();
switch (code) {
case 'b':
_isLastChunk = false;
_chunkLength = (read() << 8) + read();
break;
case 'B':
_isLastChunk = true;
_chunkLength = (read() << 8) + read();
break;
default:
throw expect("byte[]", code);
}
}
_chunkLength--;
return read();
}
/**
* Reads bytes based on an input stream.
*/
public InputStream readInputStream()
throws IOException
{
int tag = read();
switch (tag) {
case 'N':
return null;
case 'B':
case 'b':
_isLastChunk = tag == 'B';
_chunkLength = (read() << 8) + read();
break;
default:
throw expect("inputStream", tag);
}
return new InputStream() {
boolean _isClosed = false;
public int read()
throws IOException
{
if (_isClosed || _is == null)
return -1;
int ch = parseByte();
if (ch < 0)
_isClosed = true;
return ch;
}
public int read(byte []buffer, int offset, int length)
throws IOException
{
if (_isClosed || _is == null)
return -1;
int len = HessianInput.this.read(buffer, offset, length);
if (len < 0)
_isClosed = true;
return len;
}
public void close()
throws IOException
{
while (read() >= 0) {
}
_isClosed = true;
}
};
}
/**
* Reads bytes from the underlying stream.
*/
int read(byte []buffer, int offset, int length)
throws IOException
{
int readLength = 0;
while (length > 0) {
while (_chunkLength <= 0) {
if (_isLastChunk)
return readLength == 0 ? -1 : readLength;
int code = read();
switch (code) {
case 'b':
_isLastChunk = false;
_chunkLength = (read() << 8) + read();
break;
case 'B':
_isLastChunk = true;
_chunkLength = (read() << 8) + read();
break;
default:
throw expect("byte[]", code);
}
}
int sublen = _chunkLength;
if (length < sublen)
sublen = length;
sublen = _is.read(buffer, offset, sublen);
offset += sublen;
readLength += sublen;
length -= sublen;
_chunkLength -= sublen;
}
return readLength;
}
final int read()
throws IOException
{
if (_peek >= 0) {
int value = _peek;
_peek = -1;
return value;
}
int ch = _is.read();
return ch;
}
public void close()
{
_is = null;
}
public Reader getReader()
{
return null;
}
protected IOException expect(String expect, int ch)
{
return error("expected " + expect + " at " + codeName(ch));
}
protected String codeName(int ch)
{
if (ch < 0)
return "end of file";
else
return "0x" + Integer.toHexString(ch & 0xff) + " (" + (char) + ch + ")";
}
protected IOException error(String message)
{
if (_method != null)
return new HessianProtocolException(_method + ": " + message);
else
return new HessianProtocolException(message);
}
static {
try {
_detailMessageField = Throwable.class.getDeclaredField("detailMessage");
_detailMessageField.setAccessible(true);
} catch (Throwable e) {
}
}
}