001    /*
002     * Copyright 2010-2015 JetBrains s.r.o.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.jetbrains.kotlin.resolve;
018    
019    import com.google.common.collect.Lists;
020    import com.intellij.openapi.util.Key;
021    import com.intellij.psi.PsiElement;
022    import com.intellij.psi.PsiFile;
023    import org.jetbrains.annotations.NotNull;
024    import org.jetbrains.kotlin.descriptors.CallableDescriptor;
025    import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor;
026    import org.jetbrains.kotlin.descriptors.PackageFragmentDescriptor;
027    
028    import java.util.Collection;
029    import java.util.List;
030    
031    import static org.jetbrains.kotlin.resolve.DescriptorToSourceUtils.callableDescriptorToDeclaration;
032    
033    public class LibrarySourceHacks {
034        private LibrarySourceHacks() {
035        }
036    
037        public static final Key<Boolean> SKIP_TOP_LEVEL_MEMBERS = Key.create("SKIP_TOP_LEVEL_MEMBERS"); // used when analyzing library source
038    
039    
040        @NotNull
041        public static <D extends CallableDescriptor> List<D> filterOutMembersFromLibrarySource(Collection<D> members) {
042            List<D> filteredMembers = Lists.newArrayList();
043            for (D member : members) {
044                if (!shouldSkip(member)) {
045                    filteredMembers.add(member);
046                }
047            }
048            return filteredMembers;
049        }
050    
051        private static boolean shouldSkip(CallableDescriptor member) {
052            CallableDescriptor original = member.getOriginal();
053            if (!(original instanceof CallableMemberDescriptor)) {
054                return false;
055            }
056            if (!(original.getContainingDeclaration() instanceof PackageFragmentDescriptor)) {
057                return false;
058            }
059    
060            PsiElement declaration = callableDescriptorToDeclaration((CallableMemberDescriptor) original);
061            if (declaration == null) {
062                return false;
063            }
064            PsiFile file = declaration.getContainingFile();
065            return file != null && Boolean.TRUE.equals(file.getUserData(SKIP_TOP_LEVEL_MEMBERS));
066        }
067    }