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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.HashMap;
import java.util.Map;
import java.util.Properties;
import org.json.JSONException;
import org.json.JSONWriter;
import com.google.refine.history.Change;
import com.google.refine.model.Cell;
import com.google.refine.model.Project;
import com.google.refine.model.Recon;
import com.google.refine.model.Row;
import com.google.refine.util.Pool;
public class MassReconChange implements Change {
final protected Map<Long, Recon> _newRecons;
final protected Map<Long, Recon> _oldRecons;
public MassReconChange(Map<Long, Recon> newRecons, Map<Long, Recon> oldRecons) {
_newRecons = newRecons;
_oldRecons = oldRecons;
}
@Override
public void apply(Project project) {
switchRecons(project, _newRecons);
}
@Override
public void revert(Project project) {
switchRecons(project, _oldRecons);
}
protected void switchRecons(Project project, Map<Long, Recon> reconMap) {
synchronized (project) {
for (int r = 0; r < project.rows.size(); r++) {
Row row = project.rows.get(r);
for (int c = 0; c < row.cells.size(); c++) {
Cell cell = row.cells.get(c);
if (cell != null && cell.recon != null) {
Recon recon = cell.recon;
if (reconMap.containsKey(recon.id)) {
row.setCell(c, new Cell(cell.value, reconMap.get(recon.id)));
}
}
}
}
}
}
@Override
public void save(Writer writer, Properties options) throws IOException {
writeRecons(writer, options, _oldRecons, "oldReconCount");
writeRecons(writer, options, _newRecons, "newReconCount");
writer.write("/ec/\n"); // end of change marker
}
protected void writeRecons(Writer writer, Properties options, Map<Long, Recon> recons, String key) throws IOException {
writer.write(key + "="); writer.write(Integer.toString(recons.size())); writer.write('\n');
for (Recon recon : recons.values()) {
Pool pool = (Pool) options.get("pool");
pool.poolReconCandidates(recon);
JSONWriter jsonWriter = new JSONWriter(writer);
try {
recon.write(jsonWriter, options);
} catch (JSONException e) {
e.printStackTrace();
}
writer.write("\n");
}
}
static public Change load(LineNumberReader reader, Pool pool) throws Exception {
Map<Long, Recon> oldRecons = new HashMap<Long, Recon>();
Map<Long, Recon> newRecons = new HashMap<Long, Recon>();
String line;
while ((line = reader.readLine()) != null && !"/ec/".equals(line)) {
int equal = line.indexOf('=');
CharSequence field = line.subSequence(0, equal);
String value = line.substring(equal + 1);
if ("oldReconCount".equals(field)) {
loadRecons(reader, pool, oldRecons, value);
} else if ("newReconCount".equals(field)) {
loadRecons(reader, pool, newRecons, value);
}
}
MassReconChange change = new MassReconChange(newRecons, oldRecons);
return change;
}
static protected void loadRecons(LineNumberReader reader, Pool pool, Map<Long, Recon> recons, String countString) throws Exception {
int count = Integer.parseInt(countString);
for (int i = 0; i < count; i++) {
String line = reader.readLine();
Recon recon = Recon.loadStreaming(line, pool);
recons.put(recon.id, recon);
}
}
}