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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.List;
import java.util.Properties;
import com.google.refine.ProjectManager;
import com.google.refine.history.Change;
import com.google.refine.model.Column;
import com.google.refine.model.Project;
import com.google.refine.model.Row;
import com.google.refine.util.Pool;
public class MassCellChange implements Change {
final protected CellChange[] _cellChanges;
final protected String _commonColumnName;
final protected boolean _updateRowContextDependencies;
public MassCellChange(
CellChange[] cellChanges,
String commonColumnName,
boolean updateRowContextDependencies) {
_cellChanges = cellChanges;
_commonColumnName = commonColumnName;
_updateRowContextDependencies = updateRowContextDependencies;
}
public MassCellChange(
List<CellChange> cellChanges,
String commonColumnName,
boolean updateRowContextDependencies) {
_cellChanges = new CellChange[cellChanges.size()];
_commonColumnName = commonColumnName;
cellChanges.toArray(_cellChanges);
_updateRowContextDependencies = updateRowContextDependencies;
}
public MassCellChange(CellChange cellChange, String commonColumnName, boolean updateRowContextDependencies) {
_cellChanges = new CellChange[1];
_cellChanges[0] = cellChange;
_commonColumnName = commonColumnName;
_updateRowContextDependencies = updateRowContextDependencies;
}
@Override
public void apply(Project project) {
synchronized (project) {
List<Row> rows = project.rows;
for (CellChange cellChange : _cellChanges) {
rows.get(cellChange.row).setCell(cellChange.cellIndex, cellChange.newCell);
}
if (_commonColumnName != null) {
Column column = project.columnModel.getColumnByName(_commonColumnName);
column.clearPrecomputes();
ProjectManager.singleton.getInterProjectModel().flushJoinsInvolvingProjectColumn(project.id, _commonColumnName);
}
if (_updateRowContextDependencies) {
project.update();
}
}
}
@Override
public void revert(Project project) {
synchronized (project) {
List<Row> rows = project.rows;
for (CellChange cellChange : _cellChanges) {
rows.get(cellChange.row).setCell(cellChange.cellIndex, cellChange.oldCell);
}
if (_commonColumnName != null) {
Column column = project.columnModel.getColumnByName(_commonColumnName);
column.clearPrecomputes();
ProjectManager.singleton.getInterProjectModel().flushJoinsInvolvingProjectColumn(project.id, _commonColumnName);
}
if (_updateRowContextDependencies) {
project.update();
}
}
}
@Override
public void save(Writer writer, Properties options) throws IOException {
if (_commonColumnName != null) {
writer.write("commonColumnName="); writer.write(_commonColumnName); writer.write('\n');
}
writer.write("updateRowContextDependencies="); writer.write(Boolean.toString(_updateRowContextDependencies)); writer.write('\n');
writer.write("cellChangeCount="); writer.write(Integer.toString(_cellChanges.length)); writer.write('\n');
for (CellChange c : _cellChanges) {
c.save(writer, options);
}
writer.write("/ec/\n"); // end of change marker
}
static public Change load(LineNumberReader reader, Pool pool) throws Exception {
String commonColumnName = null;
boolean updateRowContextDependencies = false;
CellChange[] cellChanges = null;
String line;
while ((line = reader.readLine()) != null && !"/ec/".equals(line)) {
int equal = line.indexOf('=');
CharSequence field = line.subSequence(0, equal);
if ("commonColumnName".equals(field)) {
commonColumnName = line.substring(equal + 1);
} else if ("updateRowContextDependencies".equals(field)) {
updateRowContextDependencies = Boolean.parseBoolean(line.substring(equal + 1));
} else if ("cellChangeCount".equals(field)) {
int cellChangeCount = Integer.parseInt(line.substring(equal + 1));
cellChanges = new CellChange[cellChangeCount];
for (int i = 0; i < cellChangeCount; i++) {
cellChanges[i] = CellChange.load(reader, pool);
}
}
}
MassCellChange change = new MassCellChange(cellChanges, commonColumnName, updateRowContextDependencies);
return change;
}
}