001    /*
002     * Copyright 2010-2013 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.jet.lang.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.jet.lang.descriptors.CallableDescriptor;
024    import org.jetbrains.jet.lang.descriptors.CallableMemberDescriptor;
025    import org.jetbrains.jet.lang.descriptors.PackageFragmentDescriptor;
026    
027    import java.util.Collection;
028    import java.util.List;
029    
030    import static org.jetbrains.jet.lang.resolve.DescriptorToSourceUtils.callableDescriptorToDeclaration;
031    
032    public class LibrarySourceHacks {
033        private LibrarySourceHacks() {
034        }
035    
036        public static final Key<Boolean> SKIP_TOP_LEVEL_MEMBERS = Key.create("SKIP_TOP_LEVEL_MEMBERS"); // used when analyzing library source
037    
038    
039        public static <D extends CallableDescriptor> List<D> filterOutMembersFromLibrarySource(Collection<D> members) {
040            List<D> filteredMembers = Lists.newArrayList();
041            for (D member : members) {
042                if (!shouldSkip(member)) {
043                    filteredMembers.add(member);
044                }
045            }
046            return filteredMembers;
047        }
048    
049        private static boolean shouldSkip(CallableDescriptor member) {
050            CallableDescriptor original = member.getOriginal();
051            if (!(original instanceof CallableMemberDescriptor)) {
052                return false;
053            }
054            if (!(original.getContainingDeclaration() instanceof PackageFragmentDescriptor)) {
055                return false;
056            }
057    
058            PsiElement declaration = callableDescriptorToDeclaration((CallableMemberDescriptor) original);
059            if (declaration == null) {
060                return false;
061            }
062            PsiFile file = declaration.getContainingFile();
063            return file != null && Boolean.TRUE.equals(file.getUserData(SKIP_TOP_LEVEL_MEMBERS));
064        }
065    }