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package com.google.refine.operations.cell;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONWriter;
import com.google.refine.history.HistoryEntry;
import com.google.refine.model.AbstractOperation;
import com.google.refine.model.Cell;
import com.google.refine.model.Column;
import com.google.refine.model.Project;
import com.google.refine.model.Row;
import com.google.refine.model.changes.MassRowColumnChange;
import com.google.refine.operations.OperationRegistry;
public class TransposeRowsIntoColumnsOperation extends AbstractOperation {
final protected String _columnName;
final protected int _rowCount;
static public AbstractOperation reconstruct(Project project, JSONObject obj) throws Exception {
return new TransposeRowsIntoColumnsOperation(
obj.getString("columnName"),
obj.getInt("rowCount")
);
}
public TransposeRowsIntoColumnsOperation(
String columnName,
int rowCount
) {
_columnName = columnName;
_rowCount = rowCount;
}
@Override
public void write(JSONWriter writer, Properties options)
throws JSONException {
writer.object();
writer.key("op"); writer.value(OperationRegistry.s_opClassToName.get(this.getClass()));
writer.key("description"); writer.value("Transpose every " + _rowCount + " cells in column " + _columnName + " into separate columns");
writer.key("columnName"); writer.value(_columnName);
writer.key("rowCount"); writer.value(_rowCount);
writer.endObject();
}
@Override
protected String getBriefDescription(Project project) {
return "Transpose every " + _rowCount + " cells in column " + _columnName + " into separate columns";
}
@Override
protected HistoryEntry createHistoryEntry(Project project, long historyEntryID) throws Exception {
List<Column> newColumns = new ArrayList<Column>();
List<Column> oldColumns = project.columnModel.columns;
int columnIndex = project.columnModel.getColumnIndexByName(_columnName);
int columnCount = oldColumns.size();
for (int i = 0; i < columnCount; i++) {
Column column = oldColumns.get(i);
if (i == columnIndex) {
int newIndex = 1;
for (int n = 0; n < _rowCount; n++) {
String columnName = _columnName + " " + newIndex++;
while (project.columnModel.getColumnByName(columnName) != null) {
columnName = _columnName + " " + newIndex++;
}
newColumns.add(new Column(i + n, columnName));
}
} else if (i < columnIndex) {
newColumns.add(new Column(i, column.getName()));
} else {
newColumns.add(new Column(i + _rowCount - 1, column.getName()));
}
}
List<Row> oldRows = project.rows;
List<Row> newRows = new ArrayList<Row>(oldRows.size() / _rowCount);
for (int r = 0; r < oldRows.size(); r += _rowCount) {
Row firstNewRow = new Row(newColumns.size());
for (int r2 = 0; r2 < _rowCount && r + r2 < oldRows.size(); r2++) {
Row oldRow = oldRows.get(r + r2);
Row newRow = r2 == 0 ? firstNewRow : new Row(newColumns.size());
boolean hasData = r2 == 0;
for (int c = 0; c < oldColumns.size(); c++) {
Column column = oldColumns.get(c);
Cell cell = oldRow.getCell(column.getCellIndex());
if (cell != null && cell.value != null) {
if (c == columnIndex) {
firstNewRow.setCell(columnIndex + r2, cell);
} else if (c < columnIndex) {
newRow.setCell(c, cell);
hasData = true;
} else {
newRow.setCell(c + _rowCount - 1, cell);
hasData = true;
}
}
}
if (hasData) {
newRows.add(newRow);
}
}
}
return new HistoryEntry(
historyEntryID,
project,
getBriefDescription(null),
this,
new MassRowColumnChange(newColumns, newRows)
);
}
}