/*
* 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.lang.editor.menus;
import org.apache.log4j.Logger;
import org.jetbrains.annotations.NotNull;
import java.util.Collections;
import java.util.List;
public abstract class GroupMenuPart<ItemT, ContextT> implements MenuPart<ItemT, ContextT> {
@NotNull
@Override
public List<ItemT> createItems(ContextT context) {
try {
initialize(context);
if (!isApplicable(context)) {
return Collections.emptyList();
}
return new CompositeMenuPart<>(getParts()).createItems(context);
} catch (RuntimeException e) {
Logger.getLogger(getClass()).warn("Exception creating items of group " + this, e);
return Collections.emptyList();
}
}
protected void initialize(ContextT context) {
}
protected boolean isApplicable(ContextT context) {
return true;
}
protected abstract List<MenuPart<ItemT, ContextT>> getParts();
}