src.org.python.modules._csv.PyDialect Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jython Show documentation
Show all versions of jython Show documentation
Jython is an implementation of the high-level, dynamic, object-oriented
language Python written in 100% Pure Java, and seamlessly integrated with
the Java platform. It thus allows you to run Python on any Java platform.
/* Copyright (c) Jython Developers */
package org.python.modules._csv;
import org.python.core.ArgParser;
import org.python.core.Py;
import org.python.core.PyBaseString;
import org.python.core.PyInteger;
import org.python.core.PyNewWrapper;
import org.python.core.PyObject;
import org.python.core.PyString;
import org.python.core.PyType;
import org.python.core.Untraversable;
import org.python.expose.ExposedDelete;
import org.python.expose.ExposedGet;
import org.python.expose.ExposedNew;
import org.python.expose.ExposedSet;
import org.python.expose.ExposedType;
/**
* The Python CSV Dialect type.
*/
@Untraversable
@ExposedType(name = "_csv.Dialect", doc = PyDialect.Dialect_doc)
public class PyDialect extends PyObject {
public static final PyType TYPE = PyType.fromClass(PyDialect.class);
public static final String Dialect_doc =
"CSV dialect\n" +
"\n" +
"The Dialect type records CSV parsing and generation options.\n";
/** Whether " is represented by "". */
@ExposedGet
public boolean doublequote;
/** Field separator. */
@ExposedGet
public char delimiter;
/** Quote character. */
public char quotechar;
/** Escape character. */
public char escapechar;
/** Ignore spaces following delimiter? */
@ExposedGet
public boolean skipinitialspace;
/** String to write between records. */
@ExposedGet
public String lineterminator;
/** Style of quoting to write. */
public QuoteStyle quoting;
/** Whether an exception is raised on bad CSV. */
@ExposedGet
public boolean strict;
public PyDialect() {
super(TYPE);
}
public PyDialect(PyType subType) {
super(subType);
}
@ExposedNew
final static PyObject Dialect___new__(PyNewWrapper new_, boolean init, PyType subtype,
PyObject[] args, String[] keywords) {
ArgParser ap = new ArgParser("__new__", args, keywords,
new String[] {"dialect", "delimiter", "doublequote",
"escapechar", "lineterminator", "quotechar",
"quoting", "skipinitialspace", "strict"});
PyObject dialect = ap.getPyObject(0, null);
PyObject delimiter = ap.getPyObject(1, null);
PyObject doublequote = ap.getPyObject(2, null);
PyObject escapechar = ap.getPyObject(3, null);
PyObject lineterminator = ap.getPyObject(4, null);
PyObject quotechar = ap.getPyObject(5, null);
PyObject quoting = ap.getPyObject(6, null);
PyObject skipinitialspace = ap.getPyObject(7, null);
PyObject strict = ap.getPyObject(8, null);
if (dialect instanceof PyString) {
dialect = _csv.get_dialect_from_registry(dialect);
}
// Can we reuse this instance?
if (dialect instanceof PyDialect && delimiter == null && doublequote == null
&& escapechar == null && lineterminator == null && quotechar == null && quoting == null
&& skipinitialspace == null && strict == null) {
return dialect;
}
if (dialect != null) {
delimiter = delimiter != null ? delimiter : dialect.__findattr__("delimiter");
doublequote = doublequote != null
? doublequote : dialect.__findattr__("doublequote");
escapechar = escapechar != null ? escapechar : dialect.__findattr__("escapechar");
lineterminator = lineterminator != null
? lineterminator : dialect.__findattr__("lineterminator");
quotechar = quotechar != null ? quotechar : dialect.__findattr__("quotechar");
quoting = quoting != null ? quoting : dialect.__findattr__("quoting");
skipinitialspace = skipinitialspace != null
? skipinitialspace : dialect.__findattr__("skipinitialspace");
strict = strict != null ? strict : dialect.__findattr__("strict");
}
PyDialect self;
if (new_.for_type == subtype) {
self = new PyDialect();
} else {
self = new PyDialectDerived(subtype);
}
// check types and convert to Java values
int quotingOrdinal;
self.delimiter = toChar("delimiter", delimiter, ',');
self.doublequote = toBool("doublequote", doublequote, true);
self.escapechar = toChar("escapechar", escapechar, '\0');
self.lineterminator = toStr("lineterminator", lineterminator, "\r\n");
self.quotechar = toChar("quotechar", quotechar, '"');
quotingOrdinal = toInt("quoting", quoting, QuoteStyle.QUOTE_MINIMAL.ordinal());
self.skipinitialspace = toBool("skipinitialspace", skipinitialspace, false);
self.strict = toBool("strict", strict, false);
// validate options
self.quoting = QuoteStyle.fromOrdinal(quotingOrdinal);
if (self.quoting == null) {
throw Py.TypeError("bad \"quoting\" value");
}
if (self.delimiter == '\0') {
throw Py.TypeError("delimiter must be set");
}
if (quotechar == Py.None && quoting == null) {
self.quoting = QuoteStyle.QUOTE_NONE;
}
if (self.quoting != QuoteStyle.QUOTE_NONE && self.quotechar == '\0') {
throw Py.TypeError("quotechar must be set if quoting enabled");
}
if (self.lineterminator == null) {
throw Py.TypeError("lineterminator must be set");
}
return self;
}
private static boolean toBool(String name, PyObject src, boolean dflt) {
return src == null ? dflt : src.__nonzero__();
}
private static char toChar(String name, PyObject src, char dflt) {
if (src == null) {
return dflt;
}
boolean isStr = Py.isInstance(src, PyString.TYPE);
if (src == Py.None || isStr && src.__len__() == 0) {
return '\0';
} else if (!isStr || src.__len__() != 1) {
throw Py.TypeError(String.format("\"%s\" must be an 1-character string", name));
}
return src.toString().charAt(0);
}
private static int toInt(String name, PyObject src, int dflt) {
if (src == null) {
return dflt;
}
if (!(src instanceof PyInteger)) {
throw Py.TypeError(String.format("\"%s\" must be an integer", name));
}
return src.asInt();
}
private static String toStr(String name, PyObject src, String dflt) {
if (src == null) {
return dflt;
}
if (src == Py.None) {
return null;
}
if (!(src instanceof PyBaseString)) {
throw Py.TypeError(String.format("\"%s\" must be an string", name));
}
return src.toString();
}
@ExposedGet(name = "escapechar")
public PyObject getEscapechar() {
return escapechar == '\0' ? Py.None : Py.newString(escapechar);
}
@ExposedGet(name = "quotechar")
public PyObject getQuotechar() {
return quotechar == '\0' ? Py.None : Py.newString(quotechar);
}
@ExposedGet(name = "quoting")
public PyObject getQuoting() {
return Py.newInteger(quoting.ordinal());
}
// XXX: setQuoting and delQuoting are to make test_csv pass (currently we incorrectly
// throw TypeErrors for get/set AttributeError failures)
@ExposedSet(name = "quoting")
public void setQuoting(PyObject obj) {
throw Py.AttributeError(String.format("attribute '%s' of '%s' objects is not writable",
"quoting", getType().fastGetName()));
}
@ExposedDelete(name = "quoting")
public void delQuoting() {
throw Py.AttributeError(String.format("attribute '%s' of '%s' objects is not writable",
"quoting", getType().fastGetName()));
}
}