/*******************************************************************************
* Copyright 2012 University of Southern California
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This code was developed by the Information Integration Group as part
* of the Karma project at the Information Sciences Institute of the
* University of Southern California. For more information, publications,
* and related projects, please see: http://www.isi.edu/integration
******************************************************************************/
package edu.isi.karma.controller.command.worksheet;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import edu.isi.karma.controller.command.CommandException;
import edu.isi.karma.controller.command.CommandType;
import edu.isi.karma.controller.command.ICommand;
import edu.isi.karma.controller.command.WorksheetCommand;
import edu.isi.karma.controller.command.selection.SuperSelectionManager;
import edu.isi.karma.controller.history.CommandHistory;
import edu.isi.karma.controller.update.UpdateContainer;
import edu.isi.karma.controller.update.WorksheetUpdateFactory;
import edu.isi.karma.rep.HNode;
import edu.isi.karma.rep.Workspace;
public class RenameColumnCommand extends WorksheetCommand {
final private String newColumnName;
final private String hNodeId;
private String oldColumnName;
private static Logger logger = LoggerFactory
.getLogger(RenameColumnCommand.class);
public RenameColumnCommand(String id, String newColumnName, String hNodeId, String worksheetId) {
super(id, worksheetId);
this.newColumnName = newColumnName;
this.hNodeId = hNodeId;
}
@Override
public String getCommandName() {
return this.getClass().getSimpleName();
}
@Override
public String getTitle() {
return "Rename Column";
}
@Override
public String getDescription() {
if (newColumnName.length() > 20)
return newColumnName.substring(0, 19) + "...";
return newColumnName;
}
@Override
public CommandType getCommandType() {
return CommandType.undoable;
}
@Override
public UpdateContainer doIt(Workspace workspace) throws CommandException {
HNode columnNode = workspace.getFactory().getHNode(hNodeId);
oldColumnName = columnNode.getColumnName();
// Change the column name
columnNode.setColumnName(newColumnName);
CommandHistory history = workspace.getCommandHistory();
List<ICommand> allCommands = history._getHistory();
for(ICommand command : allCommands) {
String json = command.getInputParameterJson();
if(json != null && json.length() > 0) {
JSONArray inputs = new JSONArray(json);
for(int i=0; i<inputs.length(); i++) {
JSONObject input = inputs.getJSONObject(i);
replaceColumnName(input);
}
command.setInputParameterJson(inputs.toString());
}
}
// Prepare the output to be sent
UpdateContainer c = WorksheetUpdateFactory.createRegenerateWorksheetUpdates(worksheetId, SuperSelectionManager.DEFAULT_SELECTION);
c.append(computeAlignmentAndSemanticTypesAndCreateUpdates(workspace));
return c;
}
private void replaceColumnName(JSONObject object) {
for(Object key : object.keySet()) {
String strKey = (String)key;
Object value = object.get(strKey);
if(value instanceof String) {
String strValue = (String)value;
if(strValue.equals(oldColumnName)) {
object.put(strKey, newColumnName);
logger.info("Change column name in " + strKey + " of " + object.toString());
}
} else if(value instanceof JSONObject) {
replaceColumnName((JSONObject) value);
} else if(value instanceof JSONArray) {
JSONArray valueArr = (JSONArray) value;
for(int i=0; i<valueArr.length(); i++) {
JSONObject input = valueArr.getJSONObject(i);
replaceColumnName(input);
}
}
}
}
@Override
public UpdateContainer undoIt(Workspace workspace) {
HNode columnNode = workspace.getFactory().getHNode(hNodeId);
// Change the column name
columnNode.setColumnName(oldColumnName);
// Prepare the output to be sent
UpdateContainer c = WorksheetUpdateFactory.createRegenerateWorksheetUpdates(worksheetId, SuperSelectionManager.DEFAULT_SELECTION);
c.append(computeAlignmentAndSemanticTypesAndCreateUpdates(workspace));
return c;
}
}