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package com.google.refine.operations.row;
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.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.AbstractOperation;
import com.google.refine.model.Project;
import com.google.refine.model.Row;
import com.google.refine.model.changes.MassChange;
import com.google.refine.model.changes.RowFlagChange;
import com.google.refine.operations.EngineDependentOperation;
import com.google.refine.operations.OperationRegistry;
public class RowFlagOperation extends EngineDependentOperation {
final protected boolean _flagged;
static public AbstractOperation reconstruct(Project project, JSONObject obj) throws Exception {
JSONObject engineConfig = obj.getJSONObject("engineConfig");
boolean flagged = obj.getBoolean("flagged");
return new RowFlagOperation(
engineConfig,
flagged
);
}
public RowFlagOperation(JSONObject engineConfig, boolean flagged) {
super(engineConfig);
_flagged = flagged;
}
@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(getBriefDescription(null));
writer.key("engineConfig"); writer.value(getEngineConfig());
writer.key("flagged"); writer.value(_flagged);
writer.endObject();
}
@Override
protected String getBriefDescription(Project project) {
return (_flagged ? "Flag rows" : "Unflag rows");
}
@Override
protected HistoryEntry createHistoryEntry(Project project, long historyEntryID) throws Exception {
Engine engine = createEngine(project);
List<Change> changes = new ArrayList<Change>(project.rows.size());
FilteredRows filteredRows = engine.getAllFilteredRows();
filteredRows.accept(project, createRowVisitor(project, changes));
return new HistoryEntry(
historyEntryID,
project,
(_flagged ? "Flag" : "Unflag") + " " + changes.size() + " rows",
this,
new MassChange(changes, false)
);
}
protected RowVisitor createRowVisitor(Project project, List<Change> changes) throws Exception {
return new RowVisitor() {
List<Change> changes;
public RowVisitor init(List<Change> changes) {
this.changes = changes;
return this;
}
@Override
public void start(Project project) {
// nothing to do
}
@Override
public void end(Project project) {
// nothing to do
}
@Override
public boolean visit(Project project, int rowIndex, Row row) {
if (row.flagged != _flagged) {
RowFlagChange change = new RowFlagChange(rowIndex, _flagged);
changes.add(change);
}
return false;
}
}.init(changes);
}
}