/*
* Copyright 2003-2016 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 org.jetbrains.mps.openapi.event;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.mps.annotations.Immutable;
import org.jetbrains.mps.openapi.language.SContainmentLink;
import org.jetbrains.mps.openapi.model.SModel;
import org.jetbrains.mps.openapi.model.SNode;
/**
* Encapsulates information about node added to a model.
* To tell added root node from a child, use {@link #isRoot()}
* @since 3.3
* @author Artem Tikhomirov
*/
@Immutable
public final class SNodeAddEvent extends AbstractModelChangeEvent {
private final SModel myModel;
private final SNode myParent;
private final SNode myChild;
private final SContainmentLink myLink;
public SNodeAddEvent(@NotNull SModel model, @NotNull SNode node) {
myModel = model;
myChild = node;
myParent = null;
myLink = null;
}
public SNodeAddEvent(@NotNull SModel model, @NotNull SNode parent, @NotNull SNode child, @NotNull SContainmentLink link) {
myModel = model;
myParent = parent;
myChild = child;
myLink = link;
}
/**
* @return <code>true</code> if model root has been added
*/
public boolean isRoot() {
return myLink == null;
}
@Override
@NotNull
public SModel getModel() {
return myModel;
}
/**
* @return modified node, the one that got new {@link #getChild() child}, or <code>null</code> for root add event.
*/
@Nullable
public SNode getParent() {
return myParent;
}
@NotNull
public SNode getChild() {
return myChild;
}
@Nullable
public SContainmentLink getAggregationLink() {
return myLink;
}
}