public FrameBlock(List<ValueType> schema, List<String> names, String[][] data) {
_numRows = 0; // maintained on append
_schema = new ArrayList<ValueType>(schema);
_colnames = new ArrayList<String>(names);
_coldata = new ArrayList<Array>();
for (int i = 0; i < data.length; i++) appendRow(data[i]);
}
/**
* Appends the given argument frameblock 'that' to this frameblock by creating a deep copy to
* prevent side effects. For cbind, the frames are appended column-wise (same number of rows),
* while for rbind the frames are appended row-wise (same number of columns).
*
* @param that
* @param ret
* @param cbind
* @return
*/
public FrameBlock appendOperations(FrameBlock that, FrameBlock ret, boolean cbind)
throws DMLRuntimeException {
if (cbind) // COLUMN APPEND
{
// sanity check row dimension mismatch
if (getNumRows() != that.getNumRows()) {
throw new DMLRuntimeException(
"Incompatible number of rows for cbind: "
+ that.getNumRows()
+ " (expected: "
+ getNumRows()
+ ")");
}
// allocate output frame
if (ret == null) ret = new FrameBlock();
ret._numRows = _numRows;
// concatenate schemas (w/ deep copy to prevent side effects)
ret._schema = new ArrayList<ValueType>(_schema);
ret._schema.addAll(that._schema);
ret._colnames = new ArrayList<String>(_colnames);
ret._colnames.addAll(that._colnames);
// concatenate column data (w/ deep copy to prevent side effects)
for (Array tmp : _coldata) ret._coldata.add(tmp.clone());
for (Array tmp : that._coldata) ret._coldata.add(tmp.clone());
} else // ROW APPEND
{
// sanity check column dimension mismatch
if (getNumColumns() != that.getNumColumns()) {
throw new DMLRuntimeException(
"Incompatible number of columns for rbind: "
+ that.getNumColumns()
+ " (expected: "
+ getNumColumns()
+ ")");
}
// allocate output frame (incl deep copy schema)
if (ret == null) ret = new FrameBlock();
ret._numRows = _numRows;
ret._schema = new ArrayList<ValueType>(_schema);
ret._colnames = new ArrayList<String>(_colnames);
// concatenate data (deep copy first, append second)
for (Array tmp : _coldata) ret._coldata.add(tmp.clone());
Iterator<Object[]> iter = that.getObjectRowIterator();
while (iter.hasNext()) ret.appendRow(iter.next());
}
return ret;
}
