How to use

FSTDecoder

in

org.nustaq.serialization

@Override
public int available() throws IOException {
  return getCodec().available();
}

public Class getClassForName(String name) throws ClassNotFoundException {
  return getCodec().classForName(name);
}

@Override
public void close() throws IOException {
  closed = true;
  resetAndClearRefs();
  conf.returnObject(objects);
  getCodec().close();
}

protected Object readArray(FSTClazzInfo.FSTFieldInfo referencee, int pos) throws Exception {
  Object classOrArray = getCodec().readArrayHeader();
  if (pos < 0)
    pos = getCodec().getInputPos();
  if ( classOrArray instanceof Class == false )
    return classOrArray;
  if ( classOrArray == null )
    return null;
  Object o = readArrayNoHeader(referencee, pos, (Class) classOrArray);
  getCodec().readArrayEnd(null);
  return o;
}

protected Object instantiateHandle(FSTClazzInfo.FSTFieldInfo referencee) throws IOException {
  int handle = getCodec().readFInt();
  Object res = objects.getReadRegisteredObject(handle);
  if (res == null) {
    throw new IOException("unable to ressolve handle " + handle + " " + referencee.getDesc() + " " + getCodec().getInputPos() );
  }
  return res;
}

protected Object instantiateAndReadNoSer(Class c, FSTClazzInfo clzSerInfo, FSTClazzInfo.FSTFieldInfo referencee, int readPos) throws Exception {
  Object newObj;
  newObj = clzSerInfo.newInstance(getCodec().isMapBased());
  if (newObj == null) {
    throw new IOException(referencee.getDesc() + ":Failed to instantiate '" + c.getName() + "'. Register a custom serializer implementing instantiate or define empty constructor..");
  }
  if ( clzSerInfo.isExternalizable() )
  {
    getCodec().ensureReadAhead(readExternalReadAHead);
    ((Externalizable)newObj).readExternal(this);
    getCodec().readExternalEnd();
  } else {
    FSTClazzInfo.FSTFieldInfo[] fieldInfo = clzSerInfo.getFieldInfo();
    readObjectFields(referencee, clzSerInfo, fieldInfo, newObj,0,0);
  }
  return newObj;
}

protected void readFieldsMapBased(FSTClazzInfo.FSTFieldInfo referencee, FSTClazzInfo serializationInfo, Object newObj) throws Exception {
  String name;
  int len = getCodec().getObjectHeaderLen(); // check if len is known in advance
  if ( len < 0 )
    len = Integer.MAX_VALUE;
  int count = 0;
  boolean isUnknown = newObj.getClass() == Unknown.class; // json
  boolean inArray = isUnknown && getCodec().inArray();    // json externalized/custom serialized
  getCodec().startFieldReading(newObj);
      if ( o != null && getCodec().isEndMarker(o.toString()) )
        return;
      ((Unknown)newObj).add(o);
      continue;
    name= getCodec().readStringUTF();
    if ( len == Integer.MAX_VALUE && getCodec().isEndMarker(name) )
      return;
    count++;
              fieldInfo.setBooleanValue(newObj, getCodec().readFByte() == 0 ? false : true);
              break;
            case FSTClazzInfo.FSTFieldInfo.BYTE:
              fieldInfo.setByteValue(newObj, getCodec().readFByte());
              break;
            case FSTClazzInfo.FSTFieldInfo.CHAR:
              fieldInfo.setCharValue(newObj, getCodec().readFChar());
              break;
            case FSTClazzInfo.FSTFieldInfo.SHORT:

protected Object instantiateSpecialTag(FSTClazzInfo.FSTFieldInfo referencee, int readPos, byte code) throws Exception {
  if ( code == FSTObjectOutput.STRING ) { // faster than switch, note: currently string tag not used by all codecs ..
    String res = getCodec().readStringUTF();
    objects.registerObjectForRead(res, readPos);
    return res;
      case FSTObjectOutput.BIG_LONG: { return Long.valueOf(getCodec().readFLong()); }
      case FSTObjectOutput.BIG_BOOLEAN_FALSE: { return Boolean.FALSE; }
      case FSTObjectOutput.BIG_BOOLEAN_TRUE: { return Boolean.TRUE; }
      case FSTObjectOutput.ONE_OF: { return referencee.getOneOf()[getCodec().readFByte()]; }
        Object directObject = getCodec().getDirectObject();
        objects.registerObjectForRead(directObject,readPos);
        return directObject;
        Object directObject = getCodec().getDirectObject();
        if (directObject.getClass() == byte[].class) { // fixme. special for minibin, move it there
          if ( referencee != null && referencee.getType() == boolean[].class )
        getCodec().readObjectEnd();
        return res;

protected Object readArrayNoHeader(FSTClazzInfo.FSTFieldInfo referencee, int pos, Class arrCl) throws Exception {
  final int len = getCodec().readFInt();
  if (len == -1) {
    return null;
      objects.registerObjectForRead(array, pos );
    if (arrType.isPrimitive()) {
      return getCodec().readFPrimitiveArray(array, arrType, len);
    } else { // Object Array
      Object arr[] = (Object[]) array;
      for (int i = 0; i < len; i++) {
        Object value = readObjectWithHeader(referencee);
        value = getCodec().coerceElement(arrType, value);
        arr[i] = value;
      getCodec().readObjectEnd();

public Object readObjectWithHeader(FSTClazzInfo.FSTFieldInfo referencee) throws Exception {
  FSTClazzInfo clzSerInfo;
  Class c;
  final int readPos = getCodec().getInputPos();
  byte code = getCodec().readObjectHeaderTag();  // NOTICE: THIS ADVANCES THE INPUT STREAM...
  if (code == FSTObjectOutput.OBJECT ) {
    if (ser != null) {
      Object res = instantiateAndReadWithSer(c, ser, clzSerInfo, referencee, readPos);
      getCodec().readArrayEnd(clzSerInfo);
      return res;
    } else {

protected Object instantiateAndReadWithSer(Class c, FSTObjectSerializer ser, FSTClazzInfo clzSerInfo, FSTClazzInfo.FSTFieldInfo referencee, int readPos) throws Exception {
  boolean serInstance = false;
  Object newObj = ser.instantiate(c, this, clzSerInfo, referencee, readPos);
  if (newObj == null) {
    newObj = clzSerInfo.newInstance(getCodec().isMapBased());
  } else
    serInstance = true;
  if (newObj == null) {
    throw new IOException(referencee.getDesc() + ":Failed to instantiate '" + c.getName() + "'. Register a custom serializer implementing instantiate or define empty constructor..");
  }
  if ( newObj == FSTObjectSerializer.REALLY_NULL ) {
    newObj = null;
  } else {
    if (newObj.getClass() != c && ser == null ) {
      // for advanced trickery (e.g. returning non-serializable from FSTSerializer)
      // this hurts. so in case of FSTSerializers incoming clzInfo will refer to the
      // original class, not the one actually instantiated
      c = newObj.getClass();
      clzSerInfo = clInfoRegistry.getCLInfo(c, conf);
    }
    if ( ! referencee.isFlat() && ! clzSerInfo.isFlat() && !ser.alwaysCopy()) {
      objects.registerObjectForRead(newObj, readPos);
    }
    if ( !serInstance )
      ser.readObject(this, newObj, clzSerInfo, referencee);
  }
  getCodec().consumeEndMarker(); //=> bug when writing objects unlimited
  return newObj;
}

getCodec().moveTo(getCodec().getInputPos() - 1); // need to push back tag, cause defaultWriteObject on writer side does not write tag

protected void readFieldsMapBased(FSTClazzInfo.FSTFieldInfo referencee, FSTClazzInfo serializationInfo, Object newObj) throws Exception {
  String name;
  int len = getCodec().getObjectHeaderLen(); // check if len is known in advance
  if ( len < 0 )
    len = Integer.MAX_VALUE;
  int count = 0;
  boolean isUnknown = newObj.getClass() == Unknown.class; // json
  boolean inArray = isUnknown && getCodec().inArray();    // json externalized/custom serialized
  getCodec().startFieldReading(newObj);
      if ( o != null && getCodec().isEndMarker(o.toString()) )
        return;
      ((Unknown)newObj).add(o);
      continue;
    name= getCodec().readStringUTF();
    if ( len == Integer.MAX_VALUE && getCodec().isEndMarker(name) )
      return;
    count++;
              fieldInfo.setBooleanValue(newObj, getCodec().readFByte() == 0 ? false : true);
              break;
            case FSTClazzInfo.FSTFieldInfo.BYTE:
              fieldInfo.setByteValue(newObj, getCodec().readFByte());
              break;
            case FSTClazzInfo.FSTFieldInfo.CHAR:
              fieldInfo.setCharValue(newObj, getCodec().readFChar());
              break;
            case FSTClazzInfo.FSTFieldInfo.SHORT:

protected Object instantiateSpecialTag(FSTClazzInfo.FSTFieldInfo referencee, int readPos, byte code) throws Exception {
  if ( code == FSTObjectOutput.STRING ) { // faster than switch, note: currently string tag not used by all codecs ..
    String res = getCodec().readStringUTF();
    objects.registerObjectForRead(res, readPos);
    return res;
      case FSTObjectOutput.BIG_LONG: { return Long.valueOf(getCodec().readFLong()); }
      case FSTObjectOutput.BIG_BOOLEAN_FALSE: { return Boolean.FALSE; }
      case FSTObjectOutput.BIG_BOOLEAN_TRUE: { return Boolean.TRUE; }
      case FSTObjectOutput.ONE_OF: { return referencee.getOneOf()[getCodec().readFByte()]; }
        Object directObject = getCodec().getDirectObject();
        objects.registerObjectForRead(directObject,readPos);
        return directObject;
        Object directObject = getCodec().getDirectObject();
        if (directObject.getClass() == byte[].class) { // fixme. special for minibin, move it there
          if ( referencee != null && referencee.getType() == boolean[].class )
        getCodec().readObjectEnd();
        return res;

protected Object instantiateAndReadNoSer(Class c, FSTClazzInfo clzSerInfo, FSTClazzInfo.FSTFieldInfo referencee, int readPos) throws Exception {
  Object newObj;
  newObj = clzSerInfo.newInstance(getCodec().isMapBased());
  if (newObj == null) {
    throw new IOException(referencee.getDesc() + ":Failed to instantiate '" + c.getName() + "'. Register a custom serializer implementing instantiate or define empty constructor..");
  }
  if ( clzSerInfo.isExternalizable() )
  {
    getCodec().ensureReadAhead(readExternalReadAHead);
    ((Externalizable)newObj).readExternal(this);
    getCodec().readExternalEnd();
  } else {
    FSTClazzInfo.FSTFieldInfo[] fieldInfo = clzSerInfo.getFieldInfo();
    readObjectFields(referencee, clzSerInfo, fieldInfo, newObj,0,0);
  }
  return newObj;
}

protected Object readArrayNoHeader(FSTClazzInfo.FSTFieldInfo referencee, int pos, Class arrCl) throws Exception {
  final int len = getCodec().readFInt();
  if (len == -1) {
    return null;
      objects.registerObjectForRead(array, pos );
    if (arrType.isPrimitive()) {
      return getCodec().readFPrimitiveArray(array, arrType, len);
    } else { // Object Array
      Object arr[] = (Object[]) array;
      for (int i = 0; i < len; i++) {
        Object value = readObjectWithHeader(referencee);
        value = getCodec().coerceElement(arrType, value);
        arr[i] = value;
      getCodec().readObjectEnd();

protected Object readArray(FSTClazzInfo.FSTFieldInfo referencee, int pos) throws Exception {
  Object classOrArray = getCodec().readArrayHeader();
  if (pos < 0)
    pos = getCodec().getInputPos();
  if ( classOrArray instanceof Class == false )
    return classOrArray;
  if ( classOrArray == null )
    return null;
  Object o = readArrayNoHeader(referencee, pos, (Class) classOrArray);
  getCodec().readArrayEnd(null);
  return o;
}

public Object readObjectWithHeader(FSTClazzInfo.FSTFieldInfo referencee) throws Exception {
  FSTClazzInfo clzSerInfo;
  Class c;
  final int readPos = getCodec().getInputPos();
  byte code = getCodec().readObjectHeaderTag();  // NOTICE: THIS ADVANCES THE INPUT STREAM...
  if (code == FSTObjectOutput.OBJECT ) {
    if (ser != null) {
      Object res = instantiateAndReadWithSer(c, ser, clzSerInfo, referencee, readPos);
      getCodec().readArrayEnd(clzSerInfo);
      return res;
    } else {

protected Object instantiateHandle(FSTClazzInfo.FSTFieldInfo referencee) throws IOException {
  int handle = getCodec().readFInt();
  Object res = objects.getReadRegisteredObject(handle);
  if (res == null) {
    throw new IOException("unable to ressolve handle " + handle + " " + referencee.getDesc() + " " + getCodec().getInputPos() );
  }
  return res;
}

protected Object instantiateAndReadWithSer(Class c, FSTObjectSerializer ser, FSTClazzInfo clzSerInfo, FSTClazzInfo.FSTFieldInfo referencee, int readPos) throws Exception {
  boolean serInstance = false;
  Object newObj = ser.instantiate(c, this, clzSerInfo, referencee, readPos);
  if (newObj == null) {
    newObj = clzSerInfo.newInstance(getCodec().isMapBased());
  } else
    serInstance = true;
  if (newObj == null) {
    throw new IOException(referencee.getDesc() + ":Failed to instantiate '" + c.getName() + "'. Register a custom serializer implementing instantiate or define empty constructor..");
  }
  if ( newObj == FSTObjectSerializer.REALLY_NULL ) {
    newObj = null;
  } else {
    if (newObj.getClass() != c && ser == null ) {
      // for advanced trickery (e.g. returning non-serializable from FSTSerializer)
      // this hurts. so in case of FSTSerializers incoming clzInfo will refer to the
      // original class, not the one actually instantiated
      c = newObj.getClass();
      clzSerInfo = clInfoRegistry.getCLInfo(c, conf);
    }
    if ( ! referencee.isFlat() && ! clzSerInfo.isFlat() && !ser.alwaysCopy()) {
      objects.registerObjectForRead(newObj, readPos);
    }
    if ( !serInstance )
      ser.readObject(this, newObj, clzSerInfo, referencee);
  }
  getCodec().consumeEndMarker(); //=> bug when writing objects unlimited
  return newObj;
}