/**
* Copyright (C) 2001-2017 by RapidMiner and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapidminer.com
*
* This program is free software: you can redistribute it and/or modify it under the terms of the
* GNU Affero General Public License as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License along with this program.
* If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.gui.operatormenu;
import com.rapidminer.gui.RapidMinerGUI;
import com.rapidminer.gui.tools.SwingTools;
import com.rapidminer.operator.ExecutionUnit;
import com.rapidminer.operator.Operator;
import com.rapidminer.operator.OperatorChain;
import com.rapidminer.operator.OperatorDescription;
import com.rapidminer.operator.ports.InputPort;
import com.rapidminer.operator.ports.OutputPort;
import com.rapidminer.tools.OperatorService;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* An operator menu which can be used to replace the currently selected operator by one of the same
* type. Simple operators can be by other simple operators or operator chains, operator chains can
* only be replaced by other chains. This operator menu is available in the context menu of an
* operator in tree view.
*
* @author Ingo Mierswa, Simon Fischer, Tobias Malbrecht
*/
public class ReplaceOperatorMenu extends OperatorMenu {
private static final long serialVersionUID = -663404687013352042L;
protected ReplaceOperatorMenu(boolean onlyChains) {
super("replace_operator", onlyChains);
}
@Override
public void performAction(OperatorDescription description) {
try {
Operator operator = OperatorService.createOperator(description);
replace(operator);
} catch (Exception e) {
SwingTools.showSimpleErrorMessage("cannot_instantiate", e, description.getName());
}
}
/** The currently selected operator will be replaced by the given operator. */
private void replace(Operator operator) {
List<Operator> selection = RapidMinerGUI.getMainFrame().getSelectedOperators();
if (selection.isEmpty()) {
return;
}
Operator selectedOperator = selection.get(0);
ExecutionUnit parent = selectedOperator.getExecutionUnit();
if (parent == null) {
return;
}
// remember source and sink connections so we can reconnect them later.
Map<String, InputPort> inputPortMap = new HashMap<String, InputPort>();
Map<String, OutputPort> outputPortMap = new HashMap<String, OutputPort>();
for (OutputPort source : selectedOperator.getOutputPorts().getAllPorts()) {
if (source.isConnected()) {
inputPortMap.put(source.getName(), source.getDestination());
source.lock();
source.getDestination().lock();
}
}
for (InputPort sink : selectedOperator.getInputPorts().getAllPorts()) {
if (sink.isConnected()) {
outputPortMap.put(sink.getName(), sink.getSource());
sink.lock();
sink.getSource().lock();
}
}
selectedOperator.getOutputPorts().disconnectAll();
selectedOperator.getInputPorts().disconnectAll();
int failedReconnects = 0;
// copy children if possible
if ((selectedOperator instanceof OperatorChain) && (operator instanceof OperatorChain)) {
OperatorChain oldChain = (OperatorChain) selectedOperator;
OperatorChain newChain = (OperatorChain) operator;
int numCommonSubprocesses = Math.min(oldChain.getNumberOfSubprocesses(), newChain.getNumberOfSubprocesses());
for (int i = 0; i < numCommonSubprocesses; i++) {
ExecutionUnit oldSubprocess = oldChain.getSubprocess(i);
ExecutionUnit newSubprocess = newChain.getSubprocess(i);
failedReconnects += newSubprocess.stealOperatorsFrom(oldSubprocess);
}
}
int oldPos = parent.getOperators().indexOf(selectedOperator);
selectedOperator.remove();
parent.addOperator(operator, oldPos);
// Rewire sources and sinks
for (Map.Entry<String, InputPort> entry : inputPortMap.entrySet()) {
OutputPort mySource = operator.getOutputPorts().getPortByName(entry.getKey());
if (mySource != null) {
mySource.connectTo(entry.getValue());
mySource.unlock();
entry.getValue().unlock();
} else {
failedReconnects++;
}
}
for (Map.Entry<String, OutputPort> entry : outputPortMap.entrySet()) {
InputPort mySink = operator.getInputPorts().getPortByName(entry.getKey());
if (mySink != null) {
entry.getValue().connectTo(mySink);
entry.getValue().unlock();
mySink.unlock();
} else {
failedReconnects++;
}
}
RapidMinerGUI.getMainFrame().selectOperator(operator.getParent());
if (failedReconnects > 0) {
SwingTools.showVerySimpleErrorMessage("op_replaced_failed_connections_restored", failedReconnects);
}
}
}