/*
* Copyright 2003-2011 JetBrains s.r.o.
*
* 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.
*/
package jetbrains.mps.newTypesystem.operation;
import jetbrains.mps.newTypesystem.TypesUtil;
import jetbrains.mps.newTypesystem.state.State;
import org.jetbrains.mps.openapi.model.SNode;
import jetbrains.mps.typesystem.inference.EquationInfo;
import java.util.LinkedList;
import java.util.List;
public class AssignTypeOperation extends AbstractOperation {
final SNode myNode;
final SNode myType;
public AssignTypeOperation(SNode node, SNode type, EquationInfo info) {
myNode = node;
myType = type;
mySource = node;
setRule(info);
}
@Override
public void doUndo(State state) {
state.getNodeMaps().removeNodeType(myNode);
}
@Override
public void doRedo(State state) {
state.getNodeMaps().assignNodeType(myNode, myType);
}
@Override
public String getPresentation() {
return myNode + " : " + myType+ " assigned";
}
@Override
public String getPresentationKind() {
return PresentationKind.TYPE_ASSIGNED;
}
@Override
public List<SNode> getVariables() {
LinkedList<SNode> nodes = new LinkedList<SNode>();
if (TypesUtil.isVariable(myType)) {
nodes.add(myType);
}
return nodes;
}
public SNode getNode() {
return myNode;
}
public SNode getType() {
return myType;
}
}