bool c4_JoinViewer::GetItem(int row_, int col_, c4_Bytes& buf_)
{
c4_View v = _parent;
int o = 0;
int r = _offset.GetAt(row_);
if (r < 0)
{
o = ~r;
if (o == 0)
return false; // if this is a null row in an outer join
r -= o;
}
if (col_ >= v.NumProperties())
{
v = _argView;
r = _o;
col_ = v.FindProperty(_template.NthProperty(col_));
if (col_ < 0)
return false; // if second view doesn't have all properties
}
return v.GetItem(r, col_, buf_);
}
bool PyViewer::GetItem(int row_, int col_, c4_Bytes &buf_) {
const c4_Property &prop = _template.NthProperty(col_);
if (_byPos) {
PWOSequence item(_data[row_]);
PyRowRef::setFromPython(_tempRow, prop, item[col_]);
return prop(_tempRow).GetData(buf_);
}
PyObject *item = _data[row_];
if (PyInstance_Check(item)) {
PyObject *attr = PyObject_GetAttrString(item, (char*)prop.Name());
PyRowRef::setFromPython(_tempRow, prop, attr);
return prop(_tempRow).GetData(buf_);
}
if (PyDict_Check(item)) {
PyObject *attr = PyDict_GetItemString(item, (char*)prop.Name());
PyRowRef::setFromPython(_tempRow, prop, attr);
return prop(_tempRow).GetData(buf_);
}
if (_template.NumProperties() == 1) {
PyRowRef::setFromPython(_tempRow, prop, _data[row_]);
return prop(_tempRow).GetData(buf_);
}
Fail(PyExc_ValueError, "Object has no usable attributes");
return false;
// create a row with just this single property value
// this detour handles dicts and objects, because makeRow does
/* c4_Row one;
PyView v (prop); // nasty, stack-based temp to get at makeRow
v.makeRow(one, _data[row_]);
return prop (one).GetData(buf_); */
}
bool c4_RemapWithViewer::GetItem(int row_, int col_, c4_Bytes &buf_) {
const c4_Property &map = _argView.NthProperty(0);
d4_assert(map.Type() == 'I');
row_ = ((const c4_IntProp &)map)(_argView[row_]);
return _parent.GetItem(row_, col_, buf_);
}
bool c4_PairViewer::GetItem(int row_, int col_, c4_Bytes &buf_) {
c4_View v = _parent;
if (col_ >= v.NumProperties()) {
v = _argView;
col_ = v.FindProperty(_template.NthProperty(col_).GetId());
d4_assert(col_ >= 0);
}
return v.GetItem(row_, col_, buf_);
}
bool c4_ConcatViewer::SetItem(int row_, int col_, const c4_Bytes &buf_) {
c4_View v = _parent;
if (row_ >= _parent.GetSize()) {
v = _argView;
row_ -= _parent.GetSize();
col_ = v.FindProperty(_parent.NthProperty(col_).GetId());
d4_assert(col_ >= 0);
}
v.SetItem(row_, col_, buf_);
return true;
}
bool c4_ConcatViewer::GetItem(int row_, int col_, c4_Bytes &buf_) {
c4_View v = _parent;
if (row_ >= _parent.GetSize()) {
v = _argView;
row_ -= _parent.GetSize();
col_ = v.FindProperty(_parent.NthProperty(col_).GetId());
if (col_ < 0)
return false;
}
return v.GetItem(row_, col_, buf_);
}
bool c4_ProductViewer::GetItem(int row_, int col_, c4_Bytes &buf_) {
c4_View v = _parent;
if (col_ < v.NumProperties()) {
row_ /= _argView.GetSize();
} else {
v = _argView;
row_ %= _argView.GetSize();
col_ = v.FindProperty(_template.NthProperty(col_).GetId());
d4_assert(col_ >= 0);
}
return v.GetItem(row_, col_, buf_);
}
bool PyViewer::SetItem(int row_, int col_, const c4_Bytes &buf_) {
const c4_Property &prop = _template.NthProperty(col_);
c4_Row one;
prop(one).SetData(buf_);
PyRowRef r(one); // careful, stack-based temp
PyObject *item = r.asPython(prop);
if (_byPos) {
PWOSequence item(_data[row_]);
item[col_] = item;
} else if (PyDict_Check((PyObject*)_data))
PyDict_SetItemString(_data, (char*)prop.Name(), item);
else
PyObject_SetAttrString(_data, (char*)prop.Name(), item);
Py_DECREF(item);
return true;
}
bool c4_JoinPropViewer::GetItem(int row_, int col_, c4_Bytes &buf_) {
c4_View v = _parent;
int r = _base.GetAt(row_);
if (col_ >= _subPos)
if (col_ >= _subPos + _subWidth) {
col_ -= _subWidth - 1;
} else {
v = _sub(_parent[r]);
r = _offset.GetAt(row_);
if (r < 0)
return false;
// if this is a null row in an outer join
col_ = v.FindProperty(_template.NthProperty(col_).GetId());
if (col_ < 0)
return false;
// if subview doesn't have all properties
}
return v.GetItem(r, col_, buf_);
}
static void ViewDisplay(const c4_View& v_, int l_ =0)
{
c4_String types;
bool hasData = false, hasSubs = false;
// display header info and collect all data types
printf("%*s VIEW %5d rows =", l_, "", v_.GetSize());
for (int n = 0; n < v_.NumProperties(); ++n)
{
c4_Property prop = v_.NthProperty(n);
char t = prop.Type();
printf(" %s:%c", (const char*) prop.Name(), t);
types += t;
if (t == 'V')
hasSubs = true;
else
hasData = true;
}
printf("\n");
for (int j = 0; j < v_.GetSize(); ++j)
{
if (hasData) // data properties are all shown on the same line
{
printf("%*s %4d:", l_, "", j);
c4_RowRef r = v_[j];
c4_Bytes data;
for (int k = 0; k < types.GetLength(); ++k)
{
c4_Property p = v_.NthProperty(k);
switch (types[k])
{
case 'I':
printf(" %ld", (long) ((c4_IntProp&) p) (r));
break;
#if !q4_TINY
case 'F':
printf(" %g", (double) ((c4_FloatProp&) p) (r));
break;
case 'D':
printf(" %.12g", (double) ((c4_DoubleProp&) p) (r));
break;
#endif
case 'S':
printf(" '%s'", (const char*) ((c4_StringProp&) p) (r));
break;
case 'M': // backward compatibility
case 'B':
(p (r)).GetData(data);
printf(" (%db)", data.Size());
break;
default:
if (types[k] != 'V')
printf(" (%c?)", types[k]);
}
}
printf("\n");
}
if (hasSubs) // subviews are then shown, each as a separate block
{
for (int k = 0; k < types.GetLength(); ++k)
{
if (types[k] == 'V')
{
c4_Property prop = v_.NthProperty(k);
printf("%*s %4d: subview '%s'\n", l_, "", j,
(const char*) prop.Name());
c4_ViewProp& vp = (c4_ViewProp&) prop;
ViewDisplay(vp (v_[j]), l_ + 2);
}
}
}
}
}