protected void append_json_sequence_repr(StringBuffer buf, PySequence sequence)
throws JSONEncodeError {
int num_items = sequence.__len__();
buf.append('[');
for (int ix = 0; ix < num_items; ix++) {
buf.append(json_repr(sequence.__getitem__(ix)));
if (ix < num_items - 1) buf.append(',');
}
buf.append(']');
}
protected void append_json_map_repr(StringBuffer buf, PyObject map, PyList keys)
throws JSONEncodeError {
int num_keys = keys.__len__();
buf.append('{');
for (int ix = 0; ix < num_keys; ix++) {
PyObject k = keys.__getitem__(ix);
if (!(k instanceof PyString))
throw new JSONEncodeError(
((PyType) k.fastGetClass()).fastGetName()
+ " objects are not permitted as JSON object keys.");
append_json_string_repr(buf, ((PyString) k).toString());
buf.append(':');
buf.append(json_repr(map.__finditem__(k)));
if (ix < num_keys - 1) buf.append(',');
}
buf.append('}');
}
public void append_json_repr(StringBuffer buf, PyObject py_obj) throws JSONEncodeError {
if (py_obj instanceof PyString) append_json_string_repr(buf, ((PyString) py_obj).toString());
// Must test for PyBoolean before PyInteger because former is a subclass of latter.
else if (py_obj instanceof PyBoolean)
buf.append(((PyBoolean) py_obj).getBooleanValue() ? "true" : "false");
else if (py_obj instanceof PyInteger)
buf.append(Integer.toString(((PyInteger) py_obj).getValue()));
else if (py_obj instanceof PyLong) {
String repr = ((PyLong) py_obj).__repr__().toString();
buf.append(repr.substring(0, repr.length() - 1));
} else if (py_obj instanceof PyFloat)
buf.append(Double.toString(((PyFloat) py_obj).getValue()));
else if (py_obj instanceof PyStringMap) append_json_string_map_repr(buf, (PyStringMap) py_obj);
else if (py_obj instanceof PyDictionary)
append_json_dictionary_repr(buf, (PyDictionary) py_obj);
else if (py_obj instanceof PySequence) append_json_sequence_repr(buf, (PySequence) py_obj);
else if (py_obj instanceof PyNone) buf.append("null");
else if (py_obj.__findattr__("__json__") != null
&& py_obj.__findattr__("__json__").isCallable())
buf.append(((PyMethod) py_obj.__findattr__("__json__")).__call__().toString());
else
throw new JSONEncodeError(
"Python '"
+ ((PyType) py_obj.fastGetClass()).fastGetName()
+ "' object '"
+ py_obj.__repr__()
+ "' is not encodable in JSON");
}
protected void append_json_string_repr(StringBuffer buf, String str) {
int size = str.length();
StringBuffer v = new StringBuffer(str.length());
char quote = '"';
buf.append(quote);
for (int i = 0; size-- > 0; ) {
int ch = str.charAt(i++);
/* Escape quotes */
if (ch == quote || ch == '\\') {
buf.append('\\');
buf.append((char) ch);
} else if (ch == '\n') buf.append("\\n");
else if (ch == '\t') buf.append("\\t");
else if (ch == '\b') buf.append("\\b");
else if (ch == '\f') buf.append("\\f");
else if (ch == '\r') buf.append("\\r");
else if (ch < ' '
|| (ch >= 127 && emit_ascii)
|| (ch >= Character.MIN_SURROGATE && ch <= Character.MAX_SURROGATE)) {
/* Map control and non ascii characters to '\\uxxxx' */
buf.append("\\u");
buf.append(hexdigit[(ch >> 12) & 0xf]);
buf.append(hexdigit[(ch >> 8) & 0xf]);
buf.append(hexdigit[(ch >> 4) & 0xf]);
buf.append(hexdigit[ch & 15]);
}
/* Copy everything else as-is */
else buf.append((char) ch);
}
buf.append(quote);
}
public String json_repr(PyObject py_obj) throws JSONEncodeError {
StringBuffer buf = new StringBuffer();
append_json_repr(buf, py_obj);
return buf.toString();
}
