/*
* 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 jetbrains.mps.nodeEditor.cells.collections;
import jetbrains.mps.openapi.editor.cells.EditorCell;
import org.jetbrains.annotations.NotNull;
/**
* User: shatalin
* Date: 10/02/16
*/
public class CellContainer extends AbstractContainer<EditorCell> {
@Override
protected Entry<EditorCell> getEntry(@NotNull EditorCell item) {
//noinspection unchecked
return (Entry<EditorCell>) item.getUserObject(this);
}
@Override
protected Entry<EditorCell> createEntry(@NotNull EditorCell item) {
if (item.getUserObject(this) != null) {
return null;
}
Entry<EditorCell> entry = new EntryImpl<>(item);
item.putUserObject(this, entry);
return entry;
}
@Override
protected Entry<EditorCell> deleteEntry(@NotNull Entry<EditorCell> entry) {
if (entry.getItem().getUserObject(this) != entry) {
return null;
}
entry.getItem().putUserObject(this, null);
return entry;
}
}