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package com.google.refine.model.changes;
import java.io.IOException;
import java.io.LineNumberReader;
import java.io.Writer;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Properties;
import com.google.refine.history.Change;
import com.google.refine.model.Column;
import com.google.refine.model.ColumnGroup;
import com.google.refine.model.Project;
import com.google.refine.model.Row;
import com.google.refine.util.Pool;
public class ColumnAdditionChange extends ColumnChange {
final protected String _columnName;
final protected int _columnIndex;
final protected CellAtRow[] _newCells;
protected int _newCellIndex = -1;
protected List<ColumnGroup> _oldColumnGroups;
public ColumnAdditionChange(String columnName, int columnIndex, List<CellAtRow> newCells) {
_columnName = columnName;
_columnIndex = columnIndex;
_newCells = new CellAtRow[newCells.size()];
newCells.toArray(_newCells);
}
@Override
public void apply(Project project) {
synchronized (project) {
if (_newCellIndex < 0) {
_newCellIndex = project.columnModel.allocateNewCellIndex();
}
int columnGroupCount = project.columnModel.columnGroups.size();
_oldColumnGroups = new ArrayList<ColumnGroup>(columnGroupCount);
for (int i = columnGroupCount - 1; i >= 0; i--) {
ColumnGroup columnGroup = project.columnModel.columnGroups.get(i);
_oldColumnGroups.add(columnGroup);
if (columnGroup.startColumnIndex <= _columnIndex) {
if (columnGroup.startColumnIndex + columnGroup.columnSpan > _columnIndex) {
// the new column is inserted right in the middle of the group
project.columnModel.columnGroups.set(i, new ColumnGroup(
columnGroup.startColumnIndex,
columnGroup.columnSpan + 1,
columnGroup.keyColumnIndex < _columnIndex ?
columnGroup.keyColumnIndex :
(columnGroup.keyColumnIndex + 1)
));
}
} else {
// the new column precedes this whole group
project.columnModel.columnGroups.set(i, new ColumnGroup(
columnGroup.startColumnIndex + 1,
columnGroup.columnSpan,
columnGroup.keyColumnIndex + 1
));
}
}
Column column = new Column(_newCellIndex, _columnName);
project.columnModel.columns.add(_columnIndex, column);
try {
for (CellAtRow cell : _newCells) {
project.rows.get(cell.row).setCell(_newCellIndex, cell.cell);
}
} catch (Exception e) {
e.printStackTrace();
}
project.update();
}
}
@Override
public void revert(Project project) {
synchronized (project) {
for (CellAtRow cell : _newCells) {
Row row = project.rows.get(cell.row);
row.setCell(_newCellIndex, null);
}
project.columnModel.columns.remove(_columnIndex);
project.columnModel.columnGroups.clear();
project.columnModel.columnGroups.addAll(_oldColumnGroups);
project.update();
}
}
@Override
public void save(Writer writer, Properties options) throws IOException {
writer.write("columnName="); writer.write(_columnName); writer.write('\n');
writer.write("columnIndex="); writer.write(Integer.toString(_columnIndex)); writer.write('\n');
writer.write("newCellIndex="); writer.write(Integer.toString(_newCellIndex)); writer.write('\n');
writer.write("newCellCount="); writer.write(Integer.toString(_newCells.length)); writer.write('\n');
for (CellAtRow c : _newCells) {
c.save(writer, options);
writer.write('\n');
}
writeOldColumnGroups(writer, options, _oldColumnGroups);
writer.write("/ec/\n"); // end of change marker
}
static public Change load(LineNumberReader reader, Pool pool) throws Exception {
String columnName = null;
int columnIndex = -1;
int newCellIndex = -1;
List<CellAtRow> newCells = null;
List<ColumnGroup> oldColumnGroups = null;
String line;
while ((line = reader.readLine()) != null && !"/ec/".equals(line)) {
int equal = line.indexOf('=');
CharSequence field = line.subSequence(0, equal);
if ("columnName".equals(field)) {
columnName = line.substring(equal + 1);
} else if ("columnIndex".equals(field)) {
columnIndex = Integer.parseInt(line.substring(equal + 1));
} else if ("newCellIndex".equals(field)) {
newCellIndex = Integer.parseInt(line.substring(equal + 1));
} else if ("newCellCount".equals(field)) {
int newCellCount = Integer.parseInt(line.substring(equal + 1));
newCells = new ArrayList<CellAtRow>(newCellCount);
for (int i = 0; i < newCellCount; i++) {
line = reader.readLine();
if (line != null) {
newCells.add(CellAtRow.load(line, pool));
}
}
} else if ("oldColumnGroupCount".equals(field)) {
int oldColumnGroupCount = Integer.parseInt(line.substring(equal + 1));
oldColumnGroups = readOldColumnGroups(reader, oldColumnGroupCount);
}
}
ColumnAdditionChange change = new ColumnAdditionChange(columnName, columnIndex, newCells);
change._newCellIndex = newCellIndex;
change._oldColumnGroups = oldColumnGroups != null ?
oldColumnGroups : new LinkedList<ColumnGroup>();
return change;
}
}