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package com.google.refine.operations;
import java.util.ArrayList;
import java.util.List;
import org.json.JSONObject;
import com.google.refine.browsing.Engine;
import com.google.refine.browsing.FilteredRows;
import com.google.refine.browsing.RowVisitor;
import com.google.refine.history.Change;
import com.google.refine.history.HistoryEntry;
import com.google.refine.model.Column;
import com.google.refine.model.Project;
import com.google.refine.model.changes.CellChange;
import com.google.refine.model.changes.MassCellChange;
abstract public class EngineDependentMassCellOperation extends EngineDependentOperation {
final protected String _columnName;
final protected boolean _updateRowContextDependencies;
protected EngineDependentMassCellOperation(
JSONObject engineConfig, String columnName, boolean updateRowContextDependencies) {
super(engineConfig);
_columnName = columnName;
_updateRowContextDependencies = updateRowContextDependencies;
}
@Override
protected HistoryEntry createHistoryEntry(Project project, long historyEntryID) throws Exception {
Engine engine = createEngine(project);
Column column = project.columnModel.getColumnByName(_columnName);
if (column == null) {
throw new Exception("No column named " + _columnName);
}
List<CellChange> cellChanges = new ArrayList<CellChange>(project.rows.size());
FilteredRows filteredRows = engine.getAllFilteredRows();
try {
filteredRows.accept(project, createRowVisitor(project, cellChanges, historyEntryID));
} catch (Exception e) {
e.printStackTrace();
}
String description = createDescription(column, cellChanges);
return new HistoryEntry(
historyEntryID, project, description, this, createChange(project, column, cellChanges));
}
protected Change createChange(Project project, Column column, List<CellChange> cellChanges) {
return new MassCellChange(
cellChanges, column.getName(), _updateRowContextDependencies);
}
abstract protected RowVisitor createRowVisitor(Project project, List<CellChange> cellChanges, long historyEntryID) throws Exception;
abstract protected String createDescription(Column column, List<CellChange> cellChanges);
}