Object unpack(ByteStream buf) {
int bits = BEreadInt(buf);
float v = Float.intBitsToFloat(bits);
if (PyFloat.float_format == PyFloat.Format.UNKNOWN
&& (Float.isInfinite(v) || Float.isNaN(v))) {
throw Py.ValueError("can't unpack IEEE 754 special value on non-IEEE platform");
}
return Py.newFloat(v);
}
Object unpack(ByteStream buf) {
long bits = (((long) BEreadInt(buf)) << 32) + (BEreadInt(buf) & 0xFFFFFFFFL);
double v = Double.longBitsToDouble(bits);
if (PyFloat.double_format == PyFloat.Format.UNKNOWN
&& (Double.isInfinite(v) || Double.isNaN(v))) {
throw Py.ValueError("can't unpack IEEE 754 special value on non-IEEE platform");
}
return Py.newFloat(v);
}
private PyObject checkCircularReference(PyObject obj) {
PyObject ident = null;
if (markers != null) {
ident = Py.newInteger(Py.id(obj));
if (markers.__contains__(ident)) {
throw Py.ValueError("Circular reference detected");
}
markers.__setitem__(ident, obj);
}
return ident;
}
/**
* Creates an iterator that returns selected values from an iterable.
*
* @param startObj the index of where in the iterable to start returning values
* @param stopObj the index of where in the iterable to stop returning values
* @param stepObj the number of steps to take beween each call to <code>next()</code>
*/
public static PyIterator islice(
final PyObject iterable, PyObject startObj, PyObject stopObj, PyObject stepObj) {
final int stop = py2int(stopObj, 0, "Stop argument must be a non-negative integer or None");
final int start = py2int(startObj, 0, "Start argument must be a non-negative integer or None");
final int step = py2int(stepObj, 1, "Step argument must be a non-negative integer or None");
final boolean stopNone = stopObj instanceof PyNone;
if (start < 0 || step < 0 || stop < 0) {
throw Py.ValueError("Indices for islice() must be non-negative integers");
}
if (step == 0) {
throw Py.ValueError("Step must be one or larger for islice()");
}
return new ItertoolsIterator() {
int counter = start;
int lastCount = 0;
PyObject iter = iterable.__iter__();
public PyObject __iternext__() {
PyObject result = null;
if (counter >= stop && !stopNone) {
return null;
}
while (lastCount <= counter) {
result = nextElement(iter);
lastCount++;
}
counter += step;
return result;
}
};
}
public PyObject __call__(PyObject[] args, String[] keywords) {
BCP bcp = (BCP) __self__;
switch (index) {
case 0:
/*
* B.bcp(table, [where=None, params=None, include=None, exclude=None, toTable=None, bindings=None])
*/
String where = null;
PyObject params = Py.None;
PyArgParser parser = new PyArgParser(args, keywords);
String table = (String) parser.arg(0, Py.None).__tojava__(String.class);
if (table == null) {
throw Py.ValueError(zxJDBC.getString("invalidTableName"));
}
// 'where' can be the second argument or a keyword
if (parser.numArg() >= 2) {
where = (String) parser.arg(1, Py.None).__tojava__(String.class);
}
if (where == null) {
where = (String) parser.kw("where", Py.None).__tojava__(String.class);
}
// 'params' can be the third argument or a keyword
if (parser.numArg() >= 3) {
params = parser.arg(2, Py.None);
}
if (params == Py.None) {
params = parser.kw("params", Py.None);
}
String toTable = (String) parser.kw("toTable", Py.None).__tojava__(String.class);
PyObject include = parser.kw("include", Py.None);
PyObject exclude = parser.kw("exclude", Py.None);
PyObject bindings = parser.kw("bindings", Py.None);
PyObject count = bcp.bcp(table, where, params, include, exclude, toTable, bindings);
return count;
default:
throw info.unexpectedCall(3, false);
}
}
private static int py2int(PyObject obj, int defaultValue, String msg) {
if (obj instanceof PyNone) {
return defaultValue;
} else {
int value = defaultValue;
try {
value = Py.py2int(obj);
} catch (PyException pyEx) {
if (pyEx.match(Py.TypeError)) {
throw Py.ValueError(msg);
} else {
throw pyEx;
}
}
return value;
}
}
private PyString encode_float(PyObject obj) {
/* Return the JSON representation of a PyFloat */
double i = obj.asDouble();
if (Double.isInfinite(i) || Double.isNaN(i)) {
if (!allow_nan) {
throw Py.ValueError("Out of range float values are not JSON compliant");
}
if (i == Double.POSITIVE_INFINITY) {
return new PyString("Infinity");
} else if (i == Double.NEGATIVE_INFINITY) {
return new PyString("-Infinity");
} else {
return new PyString("NaN");
}
}
/* Use a better float format here? */
return obj.__repr__();
}
/**
* Method __call__
*
* @param arg
* @return PyObject
*/
public PyObject __call__(PyObject arg) {
BCP bcp = (BCP) __self__;
switch (index) {
case 0:
String table = (String) arg.__tojava__(String.class);
if (table == null) {
throw Py.ValueError(zxJDBC.getString("invalidTableName"));
}
PyObject count = bcp.bcp(table, null, Py.None, Py.None, Py.None, null, Py.None);
return count;
default:
throw info.unexpectedCall(1, false);
}
}
/**
* Open file and return a stream. Raise IOError upon failure. This is a port to Java of the
* CPython _io.open (Modules/_io/_iomodule.c) following the same logic, but expressed with the
* benefits of Java syntax.
*
* @param args array of arguments from Python call via Jython framework
* @param kwds array of keywords from Python call via Jython framework
* @return the stream object
*/
public static PyObject open(PyObject[] args, String[] kwds) {
// Get the arguments to variables
ArgParser ap = new ArgParser("open", args, kwds, openKwds, 1);
PyObject file = ap.getPyObject(0);
String m = ap.getString(1, "r");
int buffering = ap.getInt(2, -1);
final String encoding = ap.getString(3, null);
final String errors = ap.getString(4, null);
final String newline = ap.getString(5, null);
boolean closefd = Py.py2boolean(ap.getPyObject(6, Py.True));
// Decode the mode string
OpenMode mode =
new OpenMode(m) {
@Override
public void validate() {
super.validate();
validate(encoding, errors, newline);
}
};
mode.checkValid();
/*
* Create the Raw file stream. Let the constructor deal with the variants and argument
* checking.
*/
PyFileIO raw = new PyFileIO(file, mode, closefd);
/*
* From the Python documentation for io.open() buffering = 0 to switch buffering off (only
* allowed in binary mode), 1 to select line buffering (only usable in text mode), and an
* integer > 1 to indicate the size of a fixed-size buffer.
*
* When no buffering argument is given, the default buffering policy works as follows:
* Binary files are buffered in fixed-size chunks; "Interactive" text files (files for which
* isatty() returns True) use line buffering. Other text files use the policy described
* above for binary files.
*
* In Java, it seems a stream never is *known* to be interactive, but we ask anyway, and
* maybe one day we shall know.
*/
boolean line_buffering = false;
if (buffering == 0) {
if (!mode.binary) {
throw Py.ValueError("can't have unbuffered text I/O");
}
return raw;
} else if (buffering == 1) {
// The stream is to be read line-by-line.
line_buffering = true;
// Force default size for actual buffer
buffering = -1;
} else if (buffering < 0 && raw.isatty()) {
// No buffering argument given but stream is inteeractive.
line_buffering = true;
}
if (buffering < 0) {
/*
* We are still being asked for the default buffer size. CPython establishes the default
* buffer size using fstat(fd), but Java appears to give no clue. A useful study of
* buffer sizes in NIO is http://www.evanjones.ca/software/java-bytebuffers.html . This
* leads us to the fixed choice of _DEFAULT_BUFFER_SIZE (=8KB).
*/
buffering = _DEFAULT_BUFFER_SIZE;
}
/*
* We now know just what particular class of file we are opening, and therefore what stack
* (buffering and text encoding) we should build.
*/
if (buffering == 0) {
// Not buffering, return the raw file object
return raw;
} else {
// We are buffering, so wrap raw into a buffered file
PyObject bufferType = null;
PyObject io = imp.load("io");
if (mode.updating) {
bufferType = io.__getattr__("BufferedRandom");
} else if (mode.writing || mode.appending) {
bufferType = io.__getattr__("BufferedWriter");
} else { // = reading
bufferType = io.__getattr__("BufferedReader");
}
PyInteger pyBuffering = new PyInteger(buffering);
PyObject buffer = bufferType.__call__(raw, pyBuffering);
if (mode.binary) {
// If binary, return the just the buffered file
return buffer;
} else {
// We are opening in text mode, so wrap buffered file in a TextIOWrapper.
PyObject textType = io.__getattr__("TextIOWrapper");
PyObject[] textArgs = {
buffer,
ap.getPyObject(3, Py.None),
ap.getPyObject(4, Py.None),
ap.getPyObject(5, Py.None),
Py.newBoolean(line_buffering)
};
PyObject wrapper = textType.__call__(textArgs);
wrapper.__setattr__("mode", new PyString(m));
return wrapper;
}
}
}