/*
* 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.menus;
import jetbrains.mps.smodel.constraints.ModelConstraints;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.mps.openapi.language.SAbstractConcept;
import org.jetbrains.mps.openapi.language.SContainmentLink;
import org.jetbrains.mps.openapi.model.SNode;
import org.jetbrains.mps.openapi.model.SNodeReference;
import org.jetbrains.mps.openapi.module.SRepository;
import java.util.function.Predicate;
/**
* @author simon
*/
public class CanBeParentPredicate implements Predicate<SAbstractConcept> {
@Nullable
private final SNode myParentNode;
@NotNull
private final SRepository myRepository;
@Nullable
private final SNode myLinkDeclarationNode;
public CanBeParentPredicate(@Nullable SNode parentNode, @Nullable SContainmentLink link, @NotNull SRepository repository) {
myParentNode = parentNode;
myRepository = repository;
myLinkDeclarationNode = link == null ? null : link.getDeclarationNode();
}
@Override
public boolean test(@Nullable SAbstractConcept concept) {
if (myParentNode == null) {
return true;
}
if (concept == null) {
return true;
}
SNodeReference outputConceptSourceNodeReference = concept.getSourceNode();
if (outputConceptSourceNodeReference == null) {
return true;
}
SNode outputConceptSourceNode = outputConceptSourceNodeReference.resolve(myRepository);
if (outputConceptSourceNode == null) {
return true;
}
return (myLinkDeclarationNode == null || ModelConstraints.canBeParent(myParentNode, outputConceptSourceNode, myLinkDeclarationNode, null, null)) &&
ModelConstraints.canBeAncestor(myParentNode, null, outputConceptSourceNode, myLinkDeclarationNode, null);
}
}